RuPAC2016 - List of Keywords (linac)

Paper	Title	Other Keywords	Page
TUXMH01	The European XFEL - Status and Commissioning	electron, undulator, klystron, operation	11
	H. Weise DESY, Hamburg, Germany
	Funding: The European XFEL is funded by the respective funding agencies of the contributing countries. The European X-ray Free Electron Laser* in Hamburg, Germany, is being constructed by an international consortium. The facility is being built to offer photon beam of highest brilliance at wavelengths down to below 1 Angstrom. The accelerator complex with all its sections, the injector, the 17.5 GeV superconducting linac, bunch compressors, beam distribution systems etc. was built under the leadership of DESY. Seventeen European research institutes contributed to the accelerator complex and to the comprehensive infrastructure. DESY coordinates the European XFEL Accelerator Consortium but also contributes with many accelerator components, and the technical equipment of buildings, with its associated general infrastructure. With the finishing of the accelerator installation in autumn 2016, the first cool-down of the superconducting linac was started. Commissioning is next with the goal to demonstrate first lasing in spring 2017. Users are expected to use the first photon beams in 2017. A project overview and the status will be given illustrating the success of the collaborative work. * http://xfel.eu
	Slides TUXMH01 [48.625 MB]
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TUZMH02	INR High Intensity Proton Linac. Status and Prospects.	proton, operation, cavity, neutron	48
	A. Feschenko, L.V. Kravchuk, V.L. Serov RAS/INR, Moscow, Russia
	The status and the prospects of High Intensity INR Linac are presented. The routine beam intensity is equal to 130 mkA. The annual accelerator run duration is about 1600 hours. The main beam user facilities are multipurpose complex for neutron science, isotope production facility and proton therapy facility. The primary activities are accelerator maintenance, modernization of accelerator systems and beam transportation channels, increasing of accelerator reliability, improvement of beam parameters.
	Slides TUZMH02 [7.267 MB]
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TUZMH03	Status of IFMIF-EVEDA RFQ	rfq, vacuum, controls, operation	51
	E. Fagotti, L. Antoniazzi, A. Baldo, A. Battistello, P. Bottin, L. Ferrari, M.G. Giacchini, F. Grespan, M. Montis, A. Pisent, D. Scarpa INFN/LNL, Legnaro (PD), Italy D. Agguiaro, A.G. Colombo, A. Pepato, L. Ramina INFN- Sez. di Padova, Padova, Italy F. Borotto Dalla Vecchia, G. Dughera, G. Giraudo, E.A. Macri, P. Mereu, R. Panero INFN-Torino, Torino, Italy K. Kondo, T. Shinya QST, Aomori, Japan F. Scantamburlo IFMIF/EVEDA, Rokkasho, Japan
	All IFMIF - EVEDA RFQ modules were completed in summer 2015. In the previous year the last three modules were RF tested at LNL at nominal power up to cw operation. At the beginning of this year all the modules were assembled in three 3.3 m long super-modules structures that were shipped to Japan. RFQ was then installed and tuned with provisional aluminum tuners and end plates to nominal frequency and field distribution. Replacement of movable aluminum components with copper fixed ones increased cavity quality value not affecting field flatness and frequency.
	Slides TUZMH03 [18.884 MB]
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WEXMH01	Feeding BINP Colliders with the New VEPP-5 Injection Complex	injection, positron, electron, damping	56
	F.A. Emanov, A.V. Andrianov, K.V. Astrelina, V.V. Balakin, A.M. Barnyakov, O.V. Belikov, D.E. Berkaev, M.F. Blinov, Y.M. Boimelshtain, D. Bolkhovityanov, A.G. Chupyra, N.S. Dikansky, A.R. Frolov, Ye.A. Gusev, G.V. Karpov, A.S. Kasaev, V.I. Kokoulin, A.A. Kondakov, I. Koop, I.V. Kuptsov, G.Y. Kurkin, R.M. Lapik, N.N. Lebedev, A.E. Levichev, P.V. Logatchov, Yu. Maltseva, P.V. Martyshkin, A.A. Murasev, D.A. Nikiforov, A.V. Pavlenko, V.M. Pavlov, A.V. Petrenko, V. Podlevskih, V.V. Rashchenko, S.L. Samoylov, S.V. Shiyankov, A.N. Skrinsky, A.A. Starostenko, D.P. Sukhanov, A.G. Tribendis, A.S. Tsyganov, S.V. Vasiliev, V.D. Yudin, I.M. Zemlyansky BINP SB RAS, Novosibirsk, Russia Yu. A. Rogovsky Budker INP & NSU, Novosibirsk, Russia A.L. Romanov Fermilab, Batavia, Illinois, USA
	VEPP-4 and VEPP-2000 e⁺e⁻ colliders are switching to feed from VEPP-5 Injection Complex via newly constructed K-500 beam transfer line. Since first operation of K-500 at the end of 2015 injection complex delivered e⁺ and e^- beams to VEPP-2000 facility and is getting ready to work with VEPP-4. Upgraded injection chain demonstrated ability to provide design luminosity toVEPP-2000 and techniques of reliable operation are now under development. The designand operation experience of Injection Complex and transfer lines will be presented.
	Slides WEXMH01 [6.228 MB]
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WECAMH05	Optimization and Simuations of Beam Dynamics in APF Accelerators	simulation, acceleration, rfq, ion	70
	D.A. Ovsyannikov, V.V. Altsybeyev Saint Petersburg State University, Saint Petersburg, Russia
	Design problem of APF accelerator for ensurance enough high quality of output beam is considered. As we know, this problem is not easy because we have to achieve stability of longitudinal and transversal motions simultaneously. One of the first significant results in this subject were obtained by V. V. Kushin. In this work the problems of optimizations of intense ion beam are considered. The optimazation approaches for some beam characteristics improving (acceleration and transmission rates) are considered. Obtained results are confirmed by particle in cell simulations.
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WEYMH01	Development of MHF Conception at ITEP	proton, ion, experiment, extraction	73
	N.N. Alexeev, A. Andreev, A. Kolomiets, V.I. Nikolaev, Yu.A. Satov, A. Shumshurov, V. Stolbunov, A. Zarubin ITEP, Moscow, Russia
	The conception of Multi-purpose Hadrons Facility (MHF) began to be discussed at ITEP in the late ~2010s when ITEP-TWAC facility was intensively exploited for physical and applied research with the use of accelerated proton and ion beams varied in a wide range of operating parameters. Technological developments have continued to expand the scope of beams utilizing in diverse fields of science, medicine, industry and education. The ITEP-TWAC facility was decommissioned in 2012 and continues to remain in a state of waiting for reasonable decision on its recovery and upgrade, but conception of MHF is alive and aims at creating a technological base of particle accelerator technique intended for generation of proton and ion beams, covering the needs of many areas of fundamental, applied and technological research and industrial applications, represents a significant scientific and practical interest for modern and future engineering community. Created MHF environment should obviously be friendly and flexible for collaboration with industry, universities, and other national and foreign labs to provide continuous intelligent and technological progress. The key components of the MHF mission and vision are presented.
	Slides WEYMH01 [5.810 MB]
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WECBMH01	First Cold Tests of the Superconducting cw Demonstrator at GSI	cavity, ion, electron, cryomodule	83
	F.D. Dziuba, M. Amberg, K. Aulenbacher, W.A. Barth, V. Gettmann, M. Miski-Oglu HIM, Mainz, Germany M. Amberg, M. Basten, M. Busch, H. Podlech, M. Schwarz IAP, Frankfurt am Main, Germany K. Aulenbacher IKP, Mainz, Germany W.A. Barth, M. Heilmann, S. Mickat, S. Yaramyshev GSI, Darmstadt, Germany W.A. Barth, S. Yaramyshev MEPhI, Moscow, Russia
	The future experimental program of super heavy element synthesis at GSI desires high intense heavy ion beams at or above the coulomb barrier, exceeding the capabilities of the GSI-UNILAC (Universal Linear Accelerator). Additionally, the existing GSI accelerator chain will be used as an injector for FAIR (Facility for Antiproton and Ion Research) primarily providing high power heavy ion beams at a low repetition rate. Due to this limitations a new dedicated superconducting (sc) continuous wave (cw) linac is proposed to keep the Super Heavy Element (SHE) research program at GSI competitive. The construction of the first linac section has been finished in the 3rd quarter of 2016. It serves as a prototype to demonstrate its reliable operability in a realistic accelerator environment. This demonstrator cryomodule comprises the sc 217 MHz crossbar-H-mode (CH) multigap cavity as the key component of the whole project and two sc 9.3 T solenoids. The performance of the cavity has been extensively tested at cryogenic temperatures. In this contribution the measurement results of initial cold tests will be presented.
	Slides WECBMH01 [4.677 MB]
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FRCAMH02	Commissioning of New Light Ion RFQ Linac and First Nuclotron Run with New Injector	rfq, ion, ion-source, vacuum	153
	A.V. Butenko, A.M. Bazanov, D.E. Donets, A.D. Kovalenko, K.A. Levterov, D.A. Lyuosev, A.A. Martynov, V.V. Mialkovskiy, D.O. Ponkin, R.G. Pushkar, V.V. Seleznev, K.V. Shevchenko, I.V. Shirikov, A.O. Sidorin JINR/VBLHEP, Moscow, Russia S.V. Barabin, A.V. Kozlov, G. Kropachev, T. Kulevoy, V.G. Kuzmichev ITEP, Moscow, Russia A. Belov RAS/INR, Moscow, Russia V.V. Fimushkin, B.V. Golovenskiy, A. Govorov, V. Kobets, V.A. Monchinsky, A.V. Smirnov, G.V. Trubnikov JINR, Dubna, Moscow Region, Russia S.M. Polozov MEPhI, Moscow, Russia
	The new accelerator complex Nuclotron-based Ion Collider fAcility (NICA) is now under development and construction at JINR, Dubna. This complex is assumed to operate using two injectors: the Alvarez-type linac LU-20 as injector of light ions, polarized protons and deuterons and a new linac HILAc - injector of heavy ions beams. Old HV for-injector of the LU-20, which operated from 1974, is replaced by the new RFQ accelerator, which was commissioned in spring 2016. The first Nuclotron technological run with new fore-injector was performed in June 2016. Beams of D⁺ and H²⁺ were successfully injected and accelerated in the Nuclotron ring. Main results of the RFQ commissioning and the first Nuclotron run with new for-injector is discussed in this paper.
	Slides FRCAMH02 [30.140 MB]
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FRCAMH03	Commissioning of the New Heavy Ion Linac at the NICA Project	rfq, ion, ion-source, heavy-ion	156
	A.V. Butenko, A.M. Bazanov, D.E. Donets, A.D. Kovalenko, K.A. Levterov, D.A. Lyuosev, A.A. Martynov, V.V. Mialkovskiy, V.V. Seleznev, K.V. Shevchenko, I.V. Shirikov, A.O. Sidorin JINR/VBLHEP, Moscow, Russia B.V. Golovenskiy, A. Govorov, V. Kobets, V.A. Monchinsky, A.V. Smirnov, E. Syresin, G.V. Trubnikov JINR, Dubna, Moscow Region, Russia H. Hoeltermann, H. Podlech, U. Ratzinger, A. Schempp BEVATECH, Frankfurt, Germany D.A. Liakin ITEP, Moscow, Russia
	The new accelerator complex Nuclotron-based Ion Collider fAcility (NICA) is now under development and construction at JINR, Dubna. This complex is assumed to operate using two injectors: modernized old Alvarez-type linac LU-20 as injector of light polarized ions and a new Heavy Ion Linear Accelerator HILAc - injector of heavy ions beams. The new heavy ion linac accelerate ions with q/A values above 0.16 to 3.2 MeV/u is under commissioning. The main components are 4-Rod-RFQ and two IH - drift tube cavities is operated at 100.6 MHz. Main results of the HILAc commissioning with carbon beam from the laser ion source are discussed.
	Slides FRCAMH03 [14.452 MB]
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TUCASH02	Commissioning and First Tests of the New Standing Wave 10 Mev Electron Accelerator	simulation, coupling, electron, site	173
	S.M. Polozov, D.B. Bazyl, T.V. Bondarenko, M. Gusarova, Yu.D. Kliuchevskaia, M.V. Lalayan, V.I. Rashchikov, E.A. Savin MEPhI, Moscow, Russia M.I. Demsky, A.A. Eliseev, V.V. Krotov, D.E. Trifonov CORAD Ltd., St. Petersburg, Russia
	A new linear electron accelerator for industrial applications was developed by the joint team of CORAD and MEPhI. It is based on conventional biperiodical accelerating structure for energy range from 7.5 to 10 MeV and beam power up to 20 kW. The use of modern methods and codes for beam dynamics simulation, raised coupling coefficient and group velocity of SW biperiodic accelerating structure allowed to reach high pulse power utilization and obtain high efficiency. The first two accelerators with the new structure have been installed and tested.
	Slides TUCASH02 [4.924 MB]
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THCASH01	Effective RF Deflecting Structures for Bunch Rotation and Deflection	emittance, operation, RF-structure, luminosity	201
	V.V. Paramonov RAS/INR, Moscow, Russia
	Deflecting RF Structures find now applications for the bunch rotation with the purposes of diagnostic for the longitudinal distribution, emittance exchange and for the luminosity improvements in colliders. Report describes results of R&D program for development of deflectors with minimized level of aberrations in the distribution of deflecting field. Such structures, applied for bunch rotation along transverse axis, provide much smaller emittence growth, as compared to another options. In comparison with classical and widely used deflectors, based on disk loaded waveguide, developed structures have, depending on modification, in 2-6 times higher RF efficiency. Structures can operate both in Traveling Wave (TW) and in Standing Wave (SW) modes. To create long RF cavities for SW operation, compensated (bi-periodical) options are developed, combining field stability and high RF efficiency. The problem of stabilization for the plane of deflection is removed due to essentially 3D geometry. The main solutions for such structures development are described and achieved parameters are reported.
	Slides THCASH01 [6.084 MB]
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THCBSH01	INR RAS Instrumentation for Bunch Shape and Beam Cross-Section Monitoring	electron, diagnostics, ion, operation	204
	S.A. Gavrilov, A. Feschenko, P.I. Reinhardt-Nickoulin RAS/INR, Moscow, Russia
	Instruments for bunch shape and beam cross-section diagnostics at ion linacs are as important as complicated devices. Widespread Bunch Shape Monitors developed in INR RAS are used during a linac commissioning and optimization of beam dynamics. Beam Cross-Section Monitors implemented at INR RAS linac provide efficient non-destructive beam tuning and control. Features of both monitors investigated in simulations and beam tests are described. A variety of experimental results are presented.
	Slides THCBSH01 [12.054 MB]
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TUPSA004	Proposal of the Accelerating Structure for the First Cavity of the Main Part of INR Linac	cavity, coupling, booster, hadron	216
	I.V. Rybakov, A. Feschenko, Y.Z. Kalinin, L.V. Kravchuk, V.N. Leontiev, A.N. Naboka, V.V. Paramonov, V.L. Serov RAS/INR, Moscow, Russia
	For the beam intensity and overall stability improvement of INR linac replacement of the first four section cavity of the main part is required. The present cavity is realized as the Disks and Washers (DAW) structure. The new cavity should not lose to the present one in electro dynamical parameters with minimal modifications in the rest linac systems. As the possible structures for the first cavity replacement both proven in exploitation structures and promising developments were considered. The analysis of electro dynamical parameters, coupled RF heating, mechanical processes and manufacturing analysis were performed for the considered structures. For further development the Cut Disk Structure (CDS) option is proposed as the structure with satisfying RF parameters and having the smallest transverse dimensions in comparison with analogues. For the production simplification with minimal losses in electro dynamical parameters an unification of the main geometrical parameters for the four sections cells was performed. The possibility of multipaction in the cavity is considered and an option for its damping is proposed. The manufacturing tolerances for the structure are estimated.
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TUPSA008	Gradient Limitations for RF Accelerator on Parallel-Coupled Structure	cavity, acceleration, accelerating-gradient, vacuum	225
	Y.D. Chernousov ICKC, Novosibirsk, Russia I.V. Shebolaev ICKC SB RAS, Novosibirsk, Russia
	RF breakdown is the main gradient limitation for RF accelerator. It is believed that all the known ways to increase the accelerating gradient have been already investigated. These are increase in the frequency of the accelerating field, reduction in the pulse duration, the optimization of cavities form, selection of operating surface materials, preparation and training of accelerating structures. In this paper, we discuss the possibility of increasing the accelerating gradient due to the circuit design, i.e., the use of the parallel-coupled accelerating structure.
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TUPSA009	Electron Beam Dynamics Calculation and Accelerating Structure Geometry Design in 10 MeV Hybrid Electron Linac	electron, focusing, coupling, beam-loading	228
	A.V. Bulanov, S.V. Matsievskiy, E.A. Savin, N.P. Sobenin MEPhI, Moscow, Russia
	Electron linear accelerators with an energy of 10 MeV are widely used for industrial purposes. This article presents the electron dynamic calculations and the design of linac with a standing wave (SW) buncher based on the biperiodic accelerating structure and a constant impedance backward traveling wave (BTW) accelerating section after it. In such accelerator, all unused RF power coming out from BTW section is used in SW section to improve the linac efficiency. Thus no RF load is needed. Also, a beam is experiencing an RF focusing in the SW buncher. Solenoid focusing field influence on the beam dynamics in the TW section was studied.
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TUPSA010	Electron Linear Accelerator with the Variable Energy from 6 to 11 MeV	electron, gun, klystron, focusing	231
	A.V. Bulanov, E.A. Savin, N.P. Sobenin MEPhI, Moscow, Russia A.V. Gryzlov TORIY, Moscow, Russia
	The standing wave accelerator with the variable energy from 6 to 11 MeV has been designed. Electron energy is controlled by the injected current. The buncher has been designed to provide capture above 70% for the all injected currents range. The possibility of using a permanent radially magnetized toroidal magnet for the beam focusing was studied.
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TUPSA011	Matching the Proton Beam by Means of Independently Phased Bunchers in CYCLINAC Concept	cyclotron, proton, simulation, ion	234
	V.S. Dyubkov, S.M. Polozov, K.E. Prianishnikov MEPhI, Moscow, Russia S.M. Polozov ITEP, Moscow, Russia
	Nowadays a hadron therapy is one of the modern methods of a cancer treatment. For that purpose it is required that a proton beam, accelerated up to 250 MeV, penetrates on a depth about of 30 cm. It is known that linac, cyclotron and synchrotron can be used as a sources of proton/ion beams. The main linac advantages are a high beam quality and a possibility of beam energy variation but, on the other hand, initial low-energy part of a linac is markedly expensive. Production of mentioned beams is possible on the base of a concept called CYCLINAC, when a commercial cyclotron is used as an injector, in which protons are accelerated up to 20-30 MeV, for main linac. Matching the beam from a cyclotron with a linac input is the main problem of this concept. It is caused by difference of operating frequencies of cyclotron and linear accelerator as well as a high phase size of a bunch from the cyclotron. It is proposed to use the system of independently phased bunchers for beam matching. Solenoids are proposed to use for a limitation of transverse emittance growth. The BEAMDULAC-CYCLINAC program is developed for simulation of the self-consistent dynamics of proton beams in a matching channel. Results of beam dynamics simulation for CYCLINAC will be presented and discussed.
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TUPSA012	Superconducting Stored Energy RF Linac as Free Electron Laser Driver	cavity, electron, FEL, laser	237
	V.G. Kurakin, P.V. Kurakin LPI, Moscow, Russia
	Due to cavity losses in multi pass free electron laser (FEL), generation starts in it from definite threshold of driving electron beam current. Depending on generation wave range the threshold current strikes from fraction of ampere to dozens of amperes. In order to rich laser saturation, from hundreds to thousands electron bunches are required. Simple estimations give the value from units up to tens joules of bunches train energy in order to rich FEL saturation for infrared wave range (approximately 20 - 25 MeV of bunches energy and 3 A of pick current, bunch length being 1 cm). A beam with parameters mentioned might be obtained in rf superconducting linac operating in stored energy mode. The advantage of such approach is simplified linac power supply since dozens watts cw rf generator is required only to rich necessary accelerating voltage. At the same time the energy spread arising from beam loading may be compensated by additional cavities exited at shifted frequencies. In this paper Maxwell equations are used for beam-cavity interaction analysis. The bunch energy loss or the same the voltage induced by radiating bunch is expressed in terms of cavity external parameters. The detailed analysis of beam energy spread compensation is carried out followed by an example showing the reality of FEL schema suggested.
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TUPSA016	Beam Simulation and Measurements at Beam Line to RADEX Experimental Area of INR Linac	quadrupole, proton, simulation, emittance	250
	V.N. Aseev, S. Bragin, S.A. Gavrilov, P.I. Reinhardt-Nickoulin, O. Volodkevich RAS/INR, Moscow, Russia
	In 2015 the experimental complex beam lines of INR linac were upgraded. There is a need to study beam dynamics in these lines. The results of beam simulation at beam line to RADEX experimental area and comparison with beam measurements are presented.
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TUPSA019	Upgrade of the RF System on the LUE-200	klystron, electron, rf-amplifier, neutron	256
	K.I. Mihailov JINR/FLNP, Moscow Region, Russia E.A. Golubkov, V. Kobets, A.N. Repkin, A.P. Sumbaev JINR, Dubna, Moscow Region, Russia V.M. Pavlov BINP SB RAS, Novosibirsk, Russia
	In the report works on upgrade of RF system of the LUE-200 (IREN) electron linac are provided. The main attention is paid to system of preliminary excitement of klystrons. After work on installation of the second accelerating section RF system of Installation it was considerably remade that allowed to carry out start-up of the second stage of the IREN installation successfully. Methods, features and problems in case of a training of two accelerating sections are discussed. Influence of the temperature and frequency modes on joint operation of accelerating sections. Results of setup of the RF system and a training of sections, and also results of posting of a bunch are given.
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TUPSA025	First Results of Beam Dynamics Simulation in electron injector linac for FCC-ee	simulation, gun, beam-loading, coupling	264
	S.M. Polozov, T.V. Bondarenko MEPhI, Moscow, Russia
	New high-energy frontier project FCC is now under development at CERN. It is planed that all three modes as ee, hh and eh will be available for FCC. New injection system for FCC-ee is planned to consist of new ~ 2 GeV electron linac and electron-positron converter. Two possible layouts for further beam acceleration are discussed. The high-energy 14 GeV linac is the first layout and the booster synchrotron is the second one. Pre-injector linac design will have two regimes: ~250 pC bunches for injection and ~6 nC bunches for e⁻/e⁺ conversion. In the second case we will have extreme parameters: bunch charge up to 6 nC in 10 ps, up to 10 bunches per pulse and the pulse repetition rate up to 100 Hz. Such beam parameters lead to significant design difficulties caused by very high influence of Coulomb field in the near-cathode region and high peak beam loading. First results of beam dynamics simulation in FCC-ee injection linac and near-cathode dynamics problems are discussed in the report.
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TUPSA026	Beam Dynamics Study for the New CW RFQ	rfq, simulation, proton, space-charge	267
	S.M. Polozov, W.A. Barth, T. Kulevoy, Y. Lozeev, S. Yaramyshev MEPhI, Moscow, Russia W.A. Barth, F.D. Dziuba, S. Yaramyshev GSI, Darmstadt, Germany W.A. Barth, F.D. Dziuba HIM, Mainz, Germany T. Kulevoy, S.M. Polozov ITEP, Moscow, Russia
	A compact "university scale" CW research proton accelerator, as well as driver linac with three branches of experimental beam lines, delivering beam energy of 3, 10 and 30 MeV for dedicated experiments, are recently under development in Russia. A proposed front-end system of both linacs comprises a 2 MeV CW RFQ, which is foreseen to bunch and accelerate up to 10 mA proton beam. The RFQ design is presented. The beam dynamics simulation results, obtained by means of different simulation code, are discussed and compared.
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TUPSA028	QWR resonator Cavities Electrodynamics Simulations for new Nuclotron-NICA Injector	cavity, simulation, impedance, acceleration	273
	M. Gusarova, T. Kulevoy, M.V. Lalayan, S.M. Polozov, N.P. Sobenin, D.V. Surkov, S.A. Terekhov, S.E. Toporkov, V. Zvyagintsev MEPhI, Moscow, Russia A.V. Butenko, A.O. Sidorin, G.V. Trubnikov JINR, Dubna, Moscow Region, Russia V. Zvyagintsev TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
	New linac-injector for Nuclotron-NICA is planned to consist of quarter-wave coaxial cavities (QWR) having velocities of ~0.07c and ~0.12c (beam energy from 5 to 17 MeV). These cavities are to be superconducting and operating at 162 MHz. Current results of the QWR cavities electrodynamics simulations and geometry optimizations are presented.
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TUPSA036	Manufacturing Tolerances Estimation for Proton Linac Cavities	coupling, proton, simulation, cavity	291
	I.V. Rybakov, V.V. Paramonov, A.K. Skasyrskaya RAS/INR, Moscow, Russia
	The definition of manufacturing tolerances is one of the stages of accelerating structure construction. In case of proton linacs the value of accelerating field homogeneity is a critical parameter. It depends both on cells frequencies perturbations and the coupling coefficient perturbations. These values could be obtained using the numerical simulations of the characteristic electromagnetic oscillations in the cell. There is the method that allows the reduction of the simulations time and to avoid separate simulations for each geometrical parameter of the structure. This method was improved and extended for the pi/2-wave, pi-wave and travelling wave structures. Several examples of the method application, including the structure for the first cavity of the main part of INR linac, are presented.
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TUPSA050	Electron Beam Stability in the Energy Recovery Linac for the Lithographic Free Electron Laser	electron, cavity, undulator, radiation	319
	Ya.V. Getmanov, O.A. Shevchenko, N.A. Vinokurov BINP SB RAS, Novosibirsk, Russia N.A. Vinokurov NSU, Novosibirsk, Russia
	According to microelectronic production leaders the lithography based on the free electron laser (FEL) could become the main technology for the elements mass production with scale to 5 nm in the nearest future. One of the main problem is the absence of the working FEL with required parameters. The feasibility study of those FEL based on superconducting energy-recovery linac (ERL) was made in Budker INP. The ERL average current is limited by longitudinal and transverse instabilities, caused by interaction between electron beam and its induced fields in the superconducting cavities. The estimations of the threshold currents and ERL parameters were made.
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WEPSB005	On the Minimax Problem of Beam Dynamics Optimization	controls, rfq, acceleration, focusing	360
	M.A. Mizintseva, D.A. Ovsyannikov St. Petersburg State University, St. Petersburg, Russia
	The problem of simultaneous optimization of the ensemble of trajectories and some selected trajectory arises in the research of the charged particle beam dynamics. The present work suggests the use of a smooth functional for the evaluation of the selected trajectories and a minimax functional for the evaluation of the dynamics of the beam of trajectories. A combination of those functionals is considered.
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WEPSB020	On a New Approach for Description of Self-Consistent Distributions for a Charged Particle Beam	distributed, operation, electron, synchrotron	407
	O.I. Drivotin, D.A. Ovsyannikov St. Petersburg State University, St. Petersburg, Russia
	The present report is concerned with the problem of particle phase space distributions for a charged particle beam. A new approach is presented. It provides the possibility to specify various coordinates in the phase space. The main attention has been focused on the case where motion integrals are taken as phase coordinates. Using such coordinates, one can obtain a lot of self-consistent distributions. Some distributions for a breathing beam are considered as examples: generalized Brillouin flow, generalized KV distribution, and others. Besides, this approach allows simple graphical representation of various self-consistent distributions.
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WEPSB055	The Problems of Accelerator-Driver Design for ADS	neutron, target, proton, controls	486
	A.G. Golovkina, I.V. Kudinovich, D.A. Ovsyannikov St. Petersburg State University, St. Petersburg, Russia I.V. Kudinovich KSRC, St. Petersburg, Russia Y.A. Svistunov Saint Petersburg State University, Saint Petersburg, Russia Y.A. Svistunov NIIEFA, St. Petersburg, Russia
	Main problems of accelerator-driver design for ADS are considered. Accelerator-driver should meet additional requirements in comparison with accelerators for other purposes: - high neutron production rate; - higher reliability; - continuous operation for more than 5000 hours; - possibility of accelerator parameters adjustment to regulate ADS power level. Different types of accelerators were analyzed taking into account the mentioned features and the fact that the most prospective way of ADS application nowadays is transmutation. It's shown that the most preferable accelerator type is proton linac. Also it's marked that for demonstration facilities accelerators with lower requirements and correspondingly cost can be used.
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WEPSB057	Beam Dynamics in New 10 Mev High-Power Electron Linac for Industrial Application	electron, simulation, gun, bunching	493
	S.M. Polozov, V.I. Rashchikov MEPhI, Moscow, Russia M.I. Demsky CORAD Ltd., St. Petersburg, Russia
	Beam dynamics simulation in electron gun, bunching and accelerating cells of new 10 Mev high-power electron linac was fulfieled with the help of developed at MEPhI SUMA * and BEAMDULAC-BL ** codes. Three-electrode electron gun was used to obtain up to 400-450 mA of pulse beam current which is necessary to produce 300 mA of the accelerated beam. Precise gun simulation was conducted to satisfy all necessary output beams characteristics, such as profile, energy spectrum, phase space size etc. Some additional calculation was conducted to provide wide range of gun output beam parameters which will be used for subsequent accelerator modification. The conventional biperiodical accelerating structure based on disk loaded waveguide was used in linac. Beam dynamics optimization was pointed to obtain effective beam bunching for all energy range and to achieve narrow energy spectrum. Simulation results shows that linac provides effective beam bunching and acceleration for wide bands of beam currents and energies. * V.I. Rashchikov, PAST, Series: Nuclear Physics Investigations, 10 (18), p.50, 1990 ** T.V. Bondarenko et al. PAST, Series: Nuclear Physics Investigations, 6 (88), p. 114, 2013
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WEPSB067	Modeling of ADSR Dynamics With Proton Linac in Multi-Point Approximation	neutron, proton, HOM, feedback	511
	A.G. Golovkina St. Petersburg State University, St. Petersburg, Russia
	The mathematical model of multi-point kinetics is proposed in the paper. The transients in subcritical reactor driven by proton linac taking into account the fuel and coolant temperature feedbacks are analyzed using this model. In contrast to the widely used point kinetics model, the proposed model makes it possible to more accurately take into account the heterogeneity of the material composition in the core. That is the one of the main features of transmutation systems with accelerator-driver.
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WEPSB073	Design Study of the Proton Linac for Radiopharmaceuticals Production	DTL, cavity, rfq, focusing	524
	G. Kropachev, A.I. Balabin, T. Kulevoy, D.N. Selesnev, A. Sitnikov ITEP, Moscow, Russia T. Kulevoy MEPhI, Moscow, Russia
	The 8 MeV 200 MHz linac for acceleration of quasi cw 0.2 mA proton beam is under development at ITEP. The linac is designed for radiopharmaceuticals production which will be used in the Positron-Emission Tomography. The linac includes RFQ and DTL sections with 6D-beam matching between them. The DTL section has modular structure and consists of separated individually phased IH-cavities with beam focusing by permanent magnet quadrupoles located between the cavities. This DTL structure provides linac compactness and enables its tuning and commissioning cavity by cavity. Results of beam dynamic simulation and electrodynamics characteristics of linac cavities are presented.
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THPSC027	Solid-State Modulators for Particle Accelerators	klystron, electron, controls, high-voltage	600
	A.A. Zavadtsev, D. Churanov, D.A. Zavadtsev, D.A. Zybin Nano, Moscow, Russia
	A series of the wide parameter range solid-state high-voltage modulators has been developed and built as a power supplies for the magnetrons and the klystrons in the particle accelerators. The series includes 60 kV/100 A/6 μs modulator with pulse transformer for 3 MW magnetron, 60 kV/300 A/6 μs direct switch modulator for 6 MW multi-beam klystron, 110 kV/80A/6 μs direct switch modulator for 3 MW klystron, 130 kV/100 A/6 μs modulator with pulse transformer for 5 MW klystron, 250 kV/250 A/6 μs modulator with pulse transformer for 20 MW klystron. The last modulator is under construction. All other modulators have been supplied to customers in Russia as well as in Europe.
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THPSC041	New Superconducting Linac Injector Project for Nuclotron-Nica: Current Results	proton, acceleration, simulation, focusing	626
	S.M. Polozov, M. Gusarova, T. Kulevoy, M.V. Lalayan, A.V. Samoshin, S.E. Toporkov, V. Zvyagintsev MEPhI, Moscow, Russia M.A. Baturitski, S.A. Maksimenko INP BSU, Minsk, Belarus A.V. Butenko, A.O. Sidorin, G.V. Trubnikov JINR, Dubna, Moscow Region, Russia A.A. Marysheva, V.S. Petrakovsky, I.L. Pobol, A.I. Pokrovsky, D.A. Shparla, S.V. Yurevich Physical-Technical Institute of the National Academy of Sciences of Belarus, Minsk, Belarus V. Zvyagintsev TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
	The joint collaboration of JINR, NRNU MEPhI, INP BSU, PTI NASB, BSUIR and SPMRC NASB started in 2015 a new project on the development of superconducting cavities production and test technologies and new linac-injector design. This linac intend for the protons acceleration up to25 MeV (up to 50 MeV after upgrade) and light ions acceleration up to ~7.5 MeV/u for Nuclotron-NICA injection. Current status of linac general design and results of the beam dynamics simulation and SRF technology development are presented in this report.
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THPSC051	The Magnetic Energy Analyzer for Electron Beam Of LUE-200 Linac of IREN Facility	electron, detector, vacuum, target	647
	A.P. Sumbaev, V.I. Shokin, N.I. Tarantin JINR, Dubna, Moscow Region, Russia
	Theses for a base substantiation, results of the calculation for the electron optical parameters and design features of the magnetic energy analyzer for the beam of the electron LUE-200 linac are presented. The static dipole magnet with homogeneous transverse field and with a combined functions (the functions of a spectrometer and of a spectrograph) established after the second accelerating section, allows to spend measurements in a wide energy range of the analyzed particles up to 224 MeV with the instrumentation resolution not worse ± 5 %.
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THPSC053	The Pepper-Pot Emittance Measuring Device at the 400 keV H-minus LEBT Channel	emittance, H-minus, ion, acceleration	653
	V.S. Klenov, S. Bragin, O.T. Frolov, S.E. Golubovski, O.V. Grekhov, O. Volodkevich, V. Zubets RAS/INR, Moscow, Russia
	The emittance measuring device has been developed for operational control of INR RAS linac 400 keV H-minus injector beam parameters. It includes the "pepper-pot", the quartz screen, the CCD camera, PC, the software for camera data processing and beam phase portrait formation. The device has been mounted at the first straight section extension of H-minus LEBT after 45 degree bending magnet. When the bending magnet is switched off the device is possible to measure and to represent single shot beam phase portrait. The results of the H-minus beam emittance measurements and the device performance have been discussed.
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THPSC058	Beam Diagnostics and Instrumentation Upgrade for Multipurpose Research Complex of INR RAS	pick-up, diagnostics, controls, beam-losses	667
	S.A. Gavrilov, V. Gaidash, V.K. Gorbunov, Y.Z. Kalinin, Yu.V. Kiselev, P.I. Reinhardt-Nickoulin, I.V. Vasilyev RAS/INR, Moscow, Russia
	Accelerated proton beam of INR linac is used for various facilities in multipurpose research complex of INR RAS, including experiments of neutron investigations and medical physics laboratories. In recent years beam instrumentation for transport channels of the complex has been upgraded and supplemented. Electrostatic pick-ups, beam current transformers, ionization chambers, multiwire SEM-grids, as well as its front-end and processing electronics were developed and combined to improve beam diagnostics. Some technical details and available results of beam measurements are presented in the paper.
	Poster THPSC058 [7.154 MB]
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Paper

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TUXMH01

The European XFEL - Status and Commissioning

electron, undulator, klystron, operation

11

H. Weise
DESY, Hamburg, Germany

Funding: The European XFEL is funded by the respective funding agencies of the contributing countries.
The European X-ray Free Electron Laser* in Hamburg, Germany, is being constructed by an international consortium. The facility is being built to offer photon beam of highest brilliance at wavelengths down to below 1 Angstrom. The accelerator complex with all its sections, the injector, the 17.5 GeV superconducting linac, bunch compressors, beam distribution systems etc. was built under the leadership of DESY. Seventeen European research institutes contributed to the accelerator complex and to the comprehensive infrastructure. DESY coordinates the European XFEL Accelerator Consortium but also contributes with many accelerator components, and the technical equipment of buildings, with its associated general infrastructure. With the finishing of the accelerator installation in autumn 2016, the first cool-down of the superconducting linac was started. Commissioning is next with the goal to demonstrate first lasing in spring 2017. Users are expected to use the first photon beams in 2017. A project overview and the status will be given illustrating the success of the collaborative work.
* http://xfel.eu

Slides TUXMH01 [48.625 MB]

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TUZMH02

INR High Intensity Proton Linac. Status and Prospects.

proton, operation, cavity, neutron

48

A. Feschenko, L.V. Kravchuk, V.L. Serov
RAS/INR, Moscow, Russia

The status and the prospects of High Intensity INR Linac are presented. The routine beam intensity is equal to 130 mkA. The annual accelerator run duration is about 1600 hours. The main beam user facilities are multipurpose complex for neutron science, isotope production facility and proton therapy facility. The primary activities are accelerator maintenance, modernization of accelerator systems and beam transportation channels, increasing of accelerator reliability, improvement of beam parameters.

Slides TUZMH02 [7.267 MB]

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TUZMH03

Status of IFMIF-EVEDA RFQ

rfq, vacuum, controls, operation

51

E. Fagotti, L. Antoniazzi, A. Baldo, A. Battistello, P. Bottin, L. Ferrari, M.G. Giacchini, F. Grespan, M. Montis, A. Pisent, D. Scarpa
INFN/LNL, Legnaro (PD), Italy
D. Agguiaro, A.G. Colombo, A. Pepato, L. Ramina
INFN- Sez. di Padova, Padova, Italy
F. Borotto Dalla Vecchia, G. Dughera, G. Giraudo, E.A. Macri, P. Mereu, R. Panero
INFN-Torino, Torino, Italy
K. Kondo, T. Shinya
QST, Aomori, Japan
F. Scantamburlo
IFMIF/EVEDA, Rokkasho, Japan

All IFMIF - EVEDA RFQ modules were completed in summer 2015. In the previous year the last three modules were RF tested at LNL at nominal power up to cw operation. At the beginning of this year all the modules were assembled in three 3.3 m long super-modules structures that were shipped to Japan. RFQ was then installed and tuned with provisional aluminum tuners and end plates to nominal frequency and field distribution. Replacement of movable aluminum components with copper fixed ones increased cavity quality value not affecting field flatness and frequency.

Slides TUZMH03 [18.884 MB]

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WEXMH01

Feeding BINP Colliders with the New VEPP-5 Injection Complex

injection, positron, electron, damping

56

F.A. Emanov, A.V. Andrianov, K.V. Astrelina, V.V. Balakin, A.M. Barnyakov, O.V. Belikov, D.E. Berkaev, M.F. Blinov, Y.M. Boimelshtain, D. Bolkhovityanov, A.G. Chupyra, N.S. Dikansky, A.R. Frolov, Ye.A. Gusev, G.V. Karpov, A.S. Kasaev, V.I. Kokoulin, A.A. Kondakov, I. Koop, I.V. Kuptsov, G.Y. Kurkin, R.M. Lapik, N.N. Lebedev, A.E. Levichev, P.V. Logatchov, Yu. Maltseva, P.V. Martyshkin, A.A. Murasev, D.A. Nikiforov, A.V. Pavlenko, V.M. Pavlov, A.V. Petrenko, V. Podlevskih, V.V. Rashchenko, S.L. Samoylov, S.V. Shiyankov, A.N. Skrinsky, A.A. Starostenko, D.P. Sukhanov, A.G. Tribendis, A.S. Tsyganov, S.V. Vasiliev, V.D. Yudin, I.M. Zemlyansky
BINP SB RAS, Novosibirsk, Russia
Yu. A. Rogovsky
Budker INP & NSU, Novosibirsk, Russia
A.L. Romanov
Fermilab, Batavia, Illinois, USA

VEPP-4 and VEPP-2000 e⁺e⁻ colliders are switching to feed from VEPP-5 Injection Complex via newly constructed K-500 beam transfer line. Since first operation of K-500 at the end of 2015 injection complex delivered e⁺ and e^- beams to VEPP-2000 facility and is getting ready to work with VEPP-4. Upgraded injection chain demonstrated ability to provide design luminosity toVEPP-2000 and techniques of reliable operation are now under development. The designand operation experience of Injection Complex and transfer lines will be presented.

Slides WEXMH01 [6.228 MB]

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WECAMH05

Optimization and Simuations of Beam Dynamics in APF Accelerators

simulation, acceleration, rfq, ion

70

D.A. Ovsyannikov, V.V. Altsybeyev
Saint Petersburg State University, Saint Petersburg, Russia

Design problem of APF accelerator for ensurance enough high quality of output beam is considered. As we know, this problem is not easy because we have to achieve stability of longitudinal and transversal motions simultaneously. One of the first significant results in this subject were obtained by V. V. Kushin. In this work the problems of optimizations of intense ion beam are considered. The optimazation approaches for some beam characteristics improving (acceleration and transmission rates) are considered. Obtained results are confirmed by particle in cell simulations.

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WEYMH01

Development of MHF Conception at ITEP

proton, ion, experiment, extraction

73

N.N. Alexeev, A. Andreev, A. Kolomiets, V.I. Nikolaev, Yu.A. Satov, A. Shumshurov, V. Stolbunov, A. Zarubin
ITEP, Moscow, Russia

The conception of Multi-purpose Hadrons Facility (MHF) began to be discussed at ITEP in the late ~2010s when ITEP-TWAC facility was intensively exploited for physical and applied research with the use of accelerated proton and ion beams varied in a wide range of operating parameters. Technological developments have continued to expand the scope of beams utilizing in diverse fields of science, medicine, industry and education. The ITEP-TWAC facility was decommissioned in 2012 and continues to remain in a state of waiting for reasonable decision on its recovery and upgrade, but conception of MHF is alive and aims at creating a technological base of particle accelerator technique intended for generation of proton and ion beams, covering the needs of many areas of fundamental, applied and technological research and industrial applications, represents a significant scientific and practical interest for modern and future engineering community. Created MHF environment should obviously be friendly and flexible for collaboration with industry, universities, and other national and foreign labs to provide continuous intelligent and technological progress. The key components of the MHF mission and vision are presented.

Slides WEYMH01 [5.810 MB]

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WECBMH01

First Cold Tests of the Superconducting cw Demonstrator at GSI

cavity, ion, electron, cryomodule

83

F.D. Dziuba, M. Amberg, K. Aulenbacher, W.A. Barth, V. Gettmann, M. Miski-Oglu
HIM, Mainz, Germany
M. Amberg, M. Basten, M. Busch, H. Podlech, M. Schwarz
IAP, Frankfurt am Main, Germany
K. Aulenbacher
IKP, Mainz, Germany
W.A. Barth, M. Heilmann, S. Mickat, S. Yaramyshev
GSI, Darmstadt, Germany
W.A. Barth, S. Yaramyshev
MEPhI, Moscow, Russia

The future experimental program of super heavy element synthesis at GSI desires high intense heavy ion beams at or above the coulomb barrier, exceeding the capabilities of the GSI-UNILAC (Universal Linear Accelerator). Additionally, the existing GSI accelerator chain will be used as an injector for FAIR (Facility for Antiproton and Ion Research) primarily providing high power heavy ion beams at a low repetition rate. Due to this limitations a new dedicated superconducting (sc) continuous wave (cw) linac is proposed to keep the Super Heavy Element (SHE) research program at GSI competitive. The construction of the first linac section has been finished in the 3rd quarter of 2016. It serves as a prototype to demonstrate its reliable operability in a realistic accelerator environment. This demonstrator cryomodule comprises the sc 217 MHz crossbar-H-mode (CH) multigap cavity as the key component of the whole project and two sc 9.3 T solenoids. The performance of the cavity has been extensively tested at cryogenic temperatures. In this contribution the measurement results of initial cold tests will be presented.

Slides WECBMH01 [4.677 MB]

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FRCAMH02

Commissioning of New Light Ion RFQ Linac and First Nuclotron Run with New Injector

rfq, ion, ion-source, vacuum

153

A.V. Butenko, A.M. Bazanov, D.E. Donets, A.D. Kovalenko, K.A. Levterov, D.A. Lyuosev, A.A. Martynov, V.V. Mialkovskiy, D.O. Ponkin, R.G. Pushkar, V.V. Seleznev, K.V. Shevchenko, I.V. Shirikov, A.O. Sidorin
JINR/VBLHEP, Moscow, Russia
S.V. Barabin, A.V. Kozlov, G. Kropachev, T. Kulevoy, V.G. Kuzmichev
ITEP, Moscow, Russia
A. Belov
RAS/INR, Moscow, Russia
V.V. Fimushkin, B.V. Golovenskiy, A. Govorov, V. Kobets, V.A. Monchinsky, A.V. Smirnov, G.V. Trubnikov
JINR, Dubna, Moscow Region, Russia
S.M. Polozov
MEPhI, Moscow, Russia

The new accelerator complex Nuclotron-based Ion Collider fAcility (NICA) is now under development and construction at JINR, Dubna. This complex is assumed to operate using two injectors: the Alvarez-type linac LU-20 as injector of light ions, polarized protons and deuterons and a new linac HILAc - injector of heavy ions beams. Old HV for-injector of the LU-20, which operated from 1974, is replaced by the new RFQ accelerator, which was commissioned in spring 2016. The first Nuclotron technological run with new fore-injector was performed in June 2016. Beams of D⁺ and H²⁺ were successfully injected and accelerated in the Nuclotron ring. Main results of the RFQ commissioning and the first Nuclotron run with new for-injector is discussed in this paper.

Slides FRCAMH02 [30.140 MB]

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FRCAMH03

Commissioning of the New Heavy Ion Linac at the NICA Project

rfq, ion, ion-source, heavy-ion

156

A.V. Butenko, A.M. Bazanov, D.E. Donets, A.D. Kovalenko, K.A. Levterov, D.A. Lyuosev, A.A. Martynov, V.V. Mialkovskiy, V.V. Seleznev, K.V. Shevchenko, I.V. Shirikov, A.O. Sidorin
JINR/VBLHEP, Moscow, Russia
B.V. Golovenskiy, A. Govorov, V. Kobets, V.A. Monchinsky, A.V. Smirnov, E. Syresin, G.V. Trubnikov
JINR, Dubna, Moscow Region, Russia
H. Hoeltermann, H. Podlech, U. Ratzinger, A. Schempp
BEVATECH, Frankfurt, Germany
D.A. Liakin
ITEP, Moscow, Russia

The new accelerator complex Nuclotron-based Ion Collider fAcility (NICA) is now under development and construction at JINR, Dubna. This complex is assumed to operate using two injectors: modernized old Alvarez-type linac LU-20 as injector of light polarized ions and a new Heavy Ion Linear Accelerator HILAc - injector of heavy ions beams. The new heavy ion linac accelerate ions with q/A values above 0.16 to 3.2 MeV/u is under commissioning. The main components are 4-Rod-RFQ and two IH - drift tube cavities is operated at 100.6 MHz. Main results of the HILAc commissioning with carbon beam from the laser ion source are discussed.

Slides FRCAMH03 [14.452 MB]

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TUCASH02

Commissioning and First Tests of the New Standing Wave 10 Mev Electron Accelerator

simulation, coupling, electron, site

173

S.M. Polozov, D.B. Bazyl, T.V. Bondarenko, M. Gusarova, Yu.D. Kliuchevskaia, M.V. Lalayan, V.I. Rashchikov, E.A. Savin
MEPhI, Moscow, Russia
M.I. Demsky, A.A. Eliseev, V.V. Krotov, D.E. Trifonov
CORAD Ltd., St. Petersburg, Russia

A new linear electron accelerator for industrial applications was developed by the joint team of CORAD and MEPhI. It is based on conventional biperiodical accelerating structure for energy range from 7.5 to 10 MeV and beam power up to 20 kW. The use of modern methods and codes for beam dynamics simulation, raised coupling coefficient and group velocity of SW biperiodic accelerating structure allowed to reach high pulse power utilization and obtain high efficiency. The first two accelerators with the new structure have been installed and tested.

Slides TUCASH02 [4.924 MB]

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THCASH01

Effective RF Deflecting Structures for Bunch Rotation and Deflection

emittance, operation, RF-structure, luminosity

201

V.V. Paramonov
RAS/INR, Moscow, Russia

Deflecting RF Structures find now applications for the bunch rotation with the purposes of diagnostic for the longitudinal distribution, emittance exchange and for the luminosity improvements in colliders. Report describes results of R&D program for development of deflectors with minimized level of aberrations in the distribution of deflecting field. Such structures, applied for bunch rotation along transverse axis, provide much smaller emittence growth, as compared to another options. In comparison with classical and widely used deflectors, based on disk loaded waveguide, developed structures have, depending on modification, in 2-6 times higher RF efficiency. Structures can operate both in Traveling Wave (TW) and in Standing Wave (SW) modes. To create long RF cavities for SW operation, compensated (bi-periodical) options are developed, combining field stability and high RF efficiency. The problem of stabilization for the plane of deflection is removed due to essentially 3D geometry. The main solutions for such structures development are described and achieved parameters are reported.

Slides THCASH01 [6.084 MB]

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THCBSH01

INR RAS Instrumentation for Bunch Shape and Beam Cross-Section Monitoring

electron, diagnostics, ion, operation

204

S.A. Gavrilov, A. Feschenko, P.I. Reinhardt-Nickoulin
RAS/INR, Moscow, Russia

Instruments for bunch shape and beam cross-section diagnostics at ion linacs are as important as complicated devices. Widespread Bunch Shape Monitors developed in INR RAS are used during a linac commissioning and optimization of beam dynamics. Beam Cross-Section Monitors implemented at INR RAS linac provide efficient non-destructive beam tuning and control. Features of both monitors investigated in simulations and beam tests are described. A variety of experimental results are presented.

Slides THCBSH01 [12.054 MB]

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TUPSA004

Proposal of the Accelerating Structure for the First Cavity of the Main Part of INR Linac

cavity, coupling, booster, hadron

216

I.V. Rybakov, A. Feschenko, Y.Z. Kalinin, L.V. Kravchuk, V.N. Leontiev, A.N. Naboka, V.V. Paramonov, V.L. Serov
RAS/INR, Moscow, Russia

For the beam intensity and overall stability improvement of INR linac replacement of the first four section cavity of the main part is required. The present cavity is realized as the Disks and Washers (DAW) structure. The new cavity should not lose to the present one in electro dynamical parameters with minimal modifications in the rest linac systems. As the possible structures for the first cavity replacement both proven in exploitation structures and promising developments were considered. The analysis of electro dynamical parameters, coupled RF heating, mechanical processes and manufacturing analysis were performed for the considered structures. For further development the Cut Disk Structure (CDS) option is proposed as the structure with satisfying RF parameters and having the smallest transverse dimensions in comparison with analogues. For the production simplification with minimal losses in electro dynamical parameters an unification of the main geometrical parameters for the four sections cells was performed. The possibility of multipaction in the cavity is considered and an option for its damping is proposed. The manufacturing tolerances for the structure are estimated.

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TUPSA008

Gradient Limitations for RF Accelerator on Parallel-Coupled Structure

cavity, acceleration, accelerating-gradient, vacuum

225

Y.D. Chernousov
ICKC, Novosibirsk, Russia
I.V. Shebolaev
ICKC SB RAS, Novosibirsk, Russia

RF breakdown is the main gradient limitation for RF accelerator. It is believed that all the known ways to increase the accelerating gradient have been already investigated. These are increase in the frequency of the accelerating field, reduction in the pulse duration, the optimization of cavities form, selection of operating surface materials, preparation and training of accelerating structures. In this paper, we discuss the possibility of increasing the accelerating gradient due to the circuit design, i.e., the use of the parallel-coupled accelerating structure.

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TUPSA009

Electron Beam Dynamics Calculation and Accelerating Structure Geometry Design in 10 MeV Hybrid Electron Linac

electron, focusing, coupling, beam-loading

228

A.V. Bulanov, S.V. Matsievskiy, E.A. Savin, N.P. Sobenin
MEPhI, Moscow, Russia

Electron linear accelerators with an energy of 10 MeV are widely used for industrial purposes. This article presents the electron dynamic calculations and the design of linac with a standing wave (SW) buncher based on the biperiodic accelerating structure and a constant impedance backward traveling wave (BTW) accelerating section after it. In such accelerator, all unused RF power coming out from BTW section is used in SW section to improve the linac efficiency. Thus no RF load is needed. Also, a beam is experiencing an RF focusing in the SW buncher. Solenoid focusing field influence on the beam dynamics in the TW section was studied.

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TUPSA010

Electron Linear Accelerator with the Variable Energy from 6 to 11 MeV

electron, gun, klystron, focusing

231

A.V. Bulanov, E.A. Savin, N.P. Sobenin
MEPhI, Moscow, Russia
A.V. Gryzlov
TORIY, Moscow, Russia

The standing wave accelerator with the variable energy from 6 to 11 MeV has been designed. Electron energy is controlled by the injected current. The buncher has been designed to provide capture above 70% for the all injected currents range. The possibility of using a permanent radially magnetized toroidal magnet for the beam focusing was studied.

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TUPSA011

Matching the Proton Beam by Means of Independently Phased Bunchers in CYCLINAC Concept

cyclotron, proton, simulation, ion

234

V.S. Dyubkov, S.M. Polozov, K.E. Prianishnikov
MEPhI, Moscow, Russia
S.M. Polozov
ITEP, Moscow, Russia

Nowadays a hadron therapy is one of the modern methods of a cancer treatment. For that purpose it is required that a proton beam, accelerated up to 250 MeV, penetrates on a depth about of 30 cm. It is known that linac, cyclotron and synchrotron can be used as a sources of proton/ion beams. The main linac advantages are a high beam quality and a possibility of beam energy variation but, on the other hand, initial low-energy part of a linac is markedly expensive. Production of mentioned beams is possible on the base of a concept called CYCLINAC, when a commercial cyclotron is used as an injector, in which protons are accelerated up to 20-30 MeV, for main linac. Matching the beam from a cyclotron with a linac input is the main problem of this concept. It is caused by difference of operating frequencies of cyclotron and linear accelerator as well as a high phase size of a bunch from the cyclotron. It is proposed to use the system of independently phased bunchers for beam matching. Solenoids are proposed to use for a limitation of transverse emittance growth. The BEAMDULAC-CYCLINAC program is developed for simulation of the self-consistent dynamics of proton beams in a matching channel. Results of beam dynamics simulation for CYCLINAC will be presented and discussed.

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TUPSA012

Superconducting Stored Energy RF Linac as Free Electron Laser Driver

cavity, electron, FEL, laser

237

V.G. Kurakin, P.V. Kurakin
LPI, Moscow, Russia

Due to cavity losses in multi pass free electron laser (FEL), generation starts in it from definite threshold of driving electron beam current. Depending on generation wave range the threshold current strikes from fraction of ampere to dozens of amperes. In order to rich laser saturation, from hundreds to thousands electron bunches are required. Simple estimations give the value from units up to tens joules of bunches train energy in order to rich FEL saturation for infrared wave range (approximately 20 - 25 MeV of bunches energy and 3 A of pick current, bunch length being 1 cm). A beam with parameters mentioned might be obtained in rf superconducting linac operating in stored energy mode. The advantage of such approach is simplified linac power supply since dozens watts cw rf generator is required only to rich necessary accelerating voltage. At the same time the energy spread arising from beam loading may be compensated by additional cavities exited at shifted frequencies. In this paper Maxwell equations are used for beam-cavity interaction analysis. The bunch energy loss or the same the voltage induced by radiating bunch is expressed in terms of cavity external parameters. The detailed analysis of beam energy spread compensation is carried out followed by an example showing the reality of FEL schema suggested.

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TUPSA016

Beam Simulation and Measurements at Beam Line to RADEX Experimental Area of INR Linac

quadrupole, proton, simulation, emittance

250

V.N. Aseev, S. Bragin, S.A. Gavrilov, P.I. Reinhardt-Nickoulin, O. Volodkevich
RAS/INR, Moscow, Russia

In 2015 the experimental complex beam lines of INR linac were upgraded. There is a need to study beam dynamics in these lines. The results of beam simulation at beam line to RADEX experimental area and comparison with beam measurements are presented.

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TUPSA019

Upgrade of the RF System on the LUE-200

klystron, electron, rf-amplifier, neutron

256

K.I. Mihailov
JINR/FLNP, Moscow Region, Russia
E.A. Golubkov, V. Kobets, A.N. Repkin, A.P. Sumbaev
JINR, Dubna, Moscow Region, Russia
V.M. Pavlov
BINP SB RAS, Novosibirsk, Russia

In the report works on upgrade of RF system of the LUE-200 (IREN) electron linac are provided. The main attention is paid to system of preliminary excitement of klystrons. After work on installation of the second accelerating section RF system of Installation it was considerably remade that allowed to carry out start-up of the second stage of the IREN installation successfully. Methods, features and problems in case of a training of two accelerating sections are discussed. Influence of the temperature and frequency modes on joint operation of accelerating sections. Results of setup of the RF system and a training of sections, and also results of posting of a bunch are given.

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TUPSA025

First Results of Beam Dynamics Simulation in electron injector linac for FCC-ee

simulation, gun, beam-loading, coupling

264

S.M. Polozov, T.V. Bondarenko
MEPhI, Moscow, Russia

New high-energy frontier project FCC is now under development at CERN. It is planed that all three modes as ee, hh and eh will be available for FCC. New injection system for FCC-ee is planned to consist of new ~ 2 GeV electron linac and electron-positron converter. Two possible layouts for further beam acceleration are discussed. The high-energy 14 GeV linac is the first layout and the booster synchrotron is the second one. Pre-injector linac design will have two regimes: ~250 pC bunches for injection and ~6 nC bunches for e⁻/e⁺ conversion. In the second case we will have extreme parameters: bunch charge up to 6 nC in 10 ps, up to 10 bunches per pulse and the pulse repetition rate up to 100 Hz. Such beam parameters lead to significant design difficulties caused by very high influence of Coulomb field in the near-cathode region and high peak beam loading. First results of beam dynamics simulation in FCC-ee injection linac and near-cathode dynamics problems are discussed in the report.

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TUPSA026

Beam Dynamics Study for the New CW RFQ

rfq, simulation, proton, space-charge

267

S.M. Polozov, W.A. Barth, T. Kulevoy, Y. Lozeev, S. Yaramyshev
MEPhI, Moscow, Russia
W.A. Barth, F.D. Dziuba, S. Yaramyshev
GSI, Darmstadt, Germany
W.A. Barth, F.D. Dziuba
HIM, Mainz, Germany
T. Kulevoy, S.M. Polozov
ITEP, Moscow, Russia

A compact "university scale" CW research proton accelerator, as well as driver linac with three branches of experimental beam lines, delivering beam energy of 3, 10 and 30 MeV for dedicated experiments, are recently under development in Russia. A proposed front-end system of both linacs comprises a 2 MeV CW RFQ, which is foreseen to bunch and accelerate up to 10 mA proton beam. The RFQ design is presented. The beam dynamics simulation results, obtained by means of different simulation code, are discussed and compared.

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TUPSA028

QWR resonator Cavities Electrodynamics Simulations for new Nuclotron-NICA Injector

cavity, simulation, impedance, acceleration

273

M. Gusarova, T. Kulevoy, M.V. Lalayan, S.M. Polozov, N.P. Sobenin, D.V. Surkov, S.A. Terekhov, S.E. Toporkov, V. Zvyagintsev
MEPhI, Moscow, Russia
A.V. Butenko, A.O. Sidorin, G.V. Trubnikov
JINR, Dubna, Moscow Region, Russia
V. Zvyagintsev
TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada

New linac-injector for Nuclotron-NICA is planned to consist of quarter-wave coaxial cavities (QWR) having velocities of ~0.07c and ~0.12c (beam energy from 5 to 17 MeV). These cavities are to be superconducting and operating at 162 MHz. Current results of the QWR cavities electrodynamics simulations and geometry optimizations are presented.

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TUPSA036

Manufacturing Tolerances Estimation for Proton Linac Cavities

coupling, proton, simulation, cavity

291

I.V. Rybakov, V.V. Paramonov, A.K. Skasyrskaya
RAS/INR, Moscow, Russia

The definition of manufacturing tolerances is one of the stages of accelerating structure construction. In case of proton linacs the value of accelerating field homogeneity is a critical parameter. It depends both on cells frequencies perturbations and the coupling coefficient perturbations. These values could be obtained using the numerical simulations of the characteristic electromagnetic oscillations in the cell. There is the method that allows the reduction of the simulations time and to avoid separate simulations for each geometrical parameter of the structure. This method was improved and extended for the pi/2-wave, pi-wave and travelling wave structures. Several examples of the method application, including the structure for the first cavity of the main part of INR linac, are presented.

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TUPSA050

Electron Beam Stability in the Energy Recovery Linac for the Lithographic Free Electron Laser

electron, cavity, undulator, radiation

319

Ya.V. Getmanov, O.A. Shevchenko, N.A. Vinokurov
BINP SB RAS, Novosibirsk, Russia
N.A. Vinokurov
NSU, Novosibirsk, Russia

According to microelectronic production leaders the lithography based on the free electron laser (FEL) could become the main technology for the elements mass production with scale to 5 nm in the nearest future. One of the main problem is the absence of the working FEL with required parameters. The feasibility study of those FEL based on superconducting energy-recovery linac (ERL) was made in Budker INP. The ERL average current is limited by longitudinal and transverse instabilities, caused by interaction between electron beam and its induced fields in the superconducting cavities. The estimations of the threshold currents and ERL parameters were made.

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WEPSB005

On the Minimax Problem of Beam Dynamics Optimization

controls, rfq, acceleration, focusing

360

M.A. Mizintseva, D.A. Ovsyannikov
St. Petersburg State University, St. Petersburg, Russia

The problem of simultaneous optimization of the ensemble of trajectories and some selected trajectory arises in the research of the charged particle beam dynamics. The present work suggests the use of a smooth functional for the evaluation of the selected trajectories and a minimax functional for the evaluation of the dynamics of the beam of trajectories. A combination of those functionals is considered.

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WEPSB020

On a New Approach for Description of Self-Consistent Distributions for a Charged Particle Beam

distributed, operation, electron, synchrotron

407

O.I. Drivotin, D.A. Ovsyannikov
St. Petersburg State University, St. Petersburg, Russia

The present report is concerned with the problem of particle phase space distributions for a charged particle beam. A new approach is presented. It provides the possibility to specify various coordinates in the phase space. The main attention has been focused on the case where motion integrals are taken as phase coordinates. Using such coordinates, one can obtain a lot of self-consistent distributions. Some distributions for a breathing beam are considered as examples: generalized Brillouin flow, generalized KV distribution, and others. Besides, this approach allows simple graphical representation of various self-consistent distributions.

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WEPSB055

The Problems of Accelerator-Driver Design for ADS

neutron, target, proton, controls

486

A.G. Golovkina, I.V. Kudinovich, D.A. Ovsyannikov
St. Petersburg State University, St. Petersburg, Russia
I.V. Kudinovich
KSRC, St. Petersburg, Russia
Y.A. Svistunov
Saint Petersburg State University, Saint Petersburg, Russia
Y.A. Svistunov
NIIEFA, St. Petersburg, Russia

Main problems of accelerator-driver design for ADS are considered. Accelerator-driver should meet additional requirements in comparison with accelerators for other purposes: - high neutron production rate; - higher reliability; - continuous operation for more than 5000 hours; - possibility of accelerator parameters adjustment to regulate ADS power level. Different types of accelerators were analyzed taking into account the mentioned features and the fact that the most prospective way of ADS application nowadays is transmutation. It's shown that the most preferable accelerator type is proton linac. Also it's marked that for demonstration facilities accelerators with lower requirements and correspondingly cost can be used.

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WEPSB057

Beam Dynamics in New 10 Mev High-Power Electron Linac for Industrial Application

electron, simulation, gun, bunching

493

S.M. Polozov, V.I. Rashchikov
MEPhI, Moscow, Russia
M.I. Demsky
CORAD Ltd., St. Petersburg, Russia

Beam dynamics simulation in electron gun, bunching and accelerating cells of new 10 Mev high-power electron linac was fulfieled with the help of developed at MEPhI SUMA * and BEAMDULAC-BL ** codes. Three-electrode electron gun was used to obtain up to 400-450 mA of pulse beam current which is necessary to produce 300 mA of the accelerated beam. Precise gun simulation was conducted to satisfy all necessary output beams characteristics, such as profile, energy spectrum, phase space size etc. Some additional calculation was conducted to provide wide range of gun output beam parameters which will be used for subsequent accelerator modification. The conventional biperiodical accelerating structure based on disk loaded waveguide was used in linac. Beam dynamics optimization was pointed to obtain effective beam bunching for all energy range and to achieve narrow energy spectrum. Simulation results shows that linac provides effective beam bunching and acceleration for wide bands of beam currents and energies.
* V.I. Rashchikov, PAST, Series: Nuclear Physics Investigations, 10 (18), p.50, 1990
** T.V. Bondarenko et al. PAST, Series: Nuclear Physics Investigations, 6 (88), p. 114, 2013

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WEPSB067

Modeling of ADSR Dynamics With Proton Linac in Multi-Point Approximation

neutron, proton, HOM, feedback

511

A.G. Golovkina
St. Petersburg State University, St. Petersburg, Russia

The mathematical model of multi-point kinetics is proposed in the paper. The transients in subcritical reactor driven by proton linac taking into account the fuel and coolant temperature feedbacks are analyzed using this model. In contrast to the widely used point kinetics model, the proposed model makes it possible to more accurately take into account the heterogeneity of the material composition in the core. That is the one of the main features of transmutation systems with accelerator-driver.

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WEPSB073

Design Study of the Proton Linac for Radiopharmaceuticals Production

DTL, cavity, rfq, focusing

524

G. Kropachev, A.I. Balabin, T. Kulevoy, D.N. Selesnev, A. Sitnikov
ITEP, Moscow, Russia
T. Kulevoy
MEPhI, Moscow, Russia

The 8 MeV 200 MHz linac for acceleration of quasi cw 0.2 mA proton beam is under development at ITEP. The linac is designed for radiopharmaceuticals production which will be used in the Positron-Emission Tomography. The linac includes RFQ and DTL sections with 6D-beam matching between them. The DTL section has modular structure and consists of separated individually phased IH-cavities with beam focusing by permanent magnet quadrupoles located between the cavities. This DTL structure provides linac compactness and enables its tuning and commissioning cavity by cavity. Results of beam dynamic simulation and electrodynamics characteristics of linac cavities are presented.

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THPSC027

Solid-State Modulators for Particle Accelerators

klystron, electron, controls, high-voltage

600

A.A. Zavadtsev, D. Churanov, D.A. Zavadtsev, D.A. Zybin
Nano, Moscow, Russia

A series of the wide parameter range solid-state high-voltage modulators has been developed and built as a power supplies for the magnetrons and the klystrons in the particle accelerators. The series includes 60 kV/100 A/6 μs modulator with pulse transformer for 3 MW magnetron, 60 kV/300 A/6 μs direct switch modulator for 6 MW multi-beam klystron, 110 kV/80A/6 μs direct switch modulator for 3 MW klystron, 130 kV/100 A/6 μs modulator with pulse transformer for 5 MW klystron, 250 kV/250 A/6 μs modulator with pulse transformer for 20 MW klystron. The last modulator is under construction. All other modulators have been supplied to customers in Russia as well as in Europe.

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THPSC041

New Superconducting Linac Injector Project for Nuclotron-Nica: Current Results

proton, acceleration, simulation, focusing

626

S.M. Polozov, M. Gusarova, T. Kulevoy, M.V. Lalayan, A.V. Samoshin, S.E. Toporkov, V. Zvyagintsev
MEPhI, Moscow, Russia
M.A. Baturitski, S.A. Maksimenko
INP BSU, Minsk, Belarus
A.V. Butenko, A.O. Sidorin, G.V. Trubnikov
JINR, Dubna, Moscow Region, Russia
A.A. Marysheva, V.S. Petrakovsky, I.L. Pobol, A.I. Pokrovsky, D.A. Shparla, S.V. Yurevich
Physical-Technical Institute of the National Academy of Sciences of Belarus, Minsk, Belarus
V. Zvyagintsev
TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada

The joint collaboration of JINR, NRNU MEPhI, INP BSU, PTI NASB, BSUIR and SPMRC NASB started in 2015 a new project on the development of superconducting cavities production and test technologies and new linac-injector design. This linac intend for the protons acceleration up to25 MeV (up to 50 MeV after upgrade) and light ions acceleration up to ~7.5 MeV/u for Nuclotron-NICA injection. Current status of linac general design and results of the beam dynamics simulation and SRF technology development are presented in this report.

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THPSC051

The Magnetic Energy Analyzer for Electron Beam Of LUE-200 Linac of IREN Facility

electron, detector, vacuum, target

647

A.P. Sumbaev, V.I. Shokin, N.I. Tarantin
JINR, Dubna, Moscow Region, Russia

Theses for a base substantiation, results of the calculation for the electron optical parameters and design features of the magnetic energy analyzer for the beam of the electron LUE-200 linac are presented. The static dipole magnet with homogeneous transverse field and with a combined functions (the functions of a spectrometer and of a spectrograph) established after the second accelerating section, allows to spend measurements in a wide energy range of the analyzed particles up to 224 MeV with the instrumentation resolution not worse ± 5 %.

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THPSC053

The Pepper-Pot Emittance Measuring Device at the 400 keV H-minus LEBT Channel

emittance, H-minus, ion, acceleration

653

V.S. Klenov, S. Bragin, O.T. Frolov, S.E. Golubovski, O.V. Grekhov, O. Volodkevich, V. Zubets
RAS/INR, Moscow, Russia

The emittance measuring device has been developed for operational control of INR RAS linac 400 keV H-minus injector beam parameters. It includes the "pepper-pot", the quartz screen, the CCD camera, PC, the software for camera data processing and beam phase portrait formation. The device has been mounted at the first straight section extension of H-minus LEBT after 45 degree bending magnet. When the bending magnet is switched off the device is possible to measure and to represent single shot beam phase portrait. The results of the H-minus beam emittance measurements and the device performance have been discussed.

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THPSC058

Beam Diagnostics and Instrumentation Upgrade for Multipurpose Research Complex of INR RAS

pick-up, diagnostics, controls, beam-losses

667

S.A. Gavrilov, V. Gaidash, V.K. Gorbunov, Y.Z. Kalinin, Yu.V. Kiselev, P.I. Reinhardt-Nickoulin, I.V. Vasilyev
RAS/INR, Moscow, Russia

Accelerated proton beam of INR linac is used for various facilities in multipurpose research complex of INR RAS, including experiments of neutron investigations and medical physics laboratories. In recent years beam instrumentation for transport channels of the complex has been upgraded and supplemented. Electrostatic pick-ups, beam current transformers, ionization chambers, multiwire SEM-grids, as well as its front-end and processing electronics were developed and combined to improve beam diagnostics. Some technical details and available results of beam measurements are presented in the paper.

Poster THPSC058 [7.154 MB]

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