RuPAC2016 - List of Keywords (operation)

Paper	Title	Other Keywords	Page
TUXMH01	The European XFEL - Status and Commissioning	linac, electron, undulator, klystron	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.	linac, proton, 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, linac, vacuum, controls	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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WECBMH02	Collector Ring Project at FAIR: Present Status	quadrupole, injection, lattice, sextupole	86
	P.Yu. Shatunov, V.V. Anashin, E.A. Bekhtenev, D.E. Berkaev, M.I. Bryzgunov, D. Gurov, A.S. Kasaev, V.V. Kolmogorov, I. Koop, A.A. Krasnov, O.I. Meshkov, Yu. A. Rogovsky, T.V. Rybitskaya, A.V. Semenov, Y.M. Shatunov, S.V. Shiyankov, D.B. Shwartz, A.A. Starostenko, A.V. Sukhanov, A.S. Tsyganov, A.V. Utkin BINP SB RAS, Novosibirsk, Russia
	In November 2013, the FAIR management delegated the responsibility for the technical design, construction, installation, and commissioning of the whole CR and its components from GSI to Budker Institute of Nuclear Physics (BINP). Since that time a lot of modifications of the original design were made aiming to improve the beam parameters and the machine performance. This work shows the present status of the development.
	Slides WECBMH02 [20.497 MB]
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THCAMH02	Electron Accelerators Series ILU and Prospects of Their Application in the Food Industry	electron, radiation, acceleration, high-voltage	108
	V.O. Tkachenko, V.V. Bezuglov, A.A. Bryazgin, B.L. Faktorovich, V.A. Gorbunov, M.V. Korobeynikov, V.E. Nekhaev, A.D. Panfilov, V.M. Radchenko, E.A. Shtarklev, A.V. Sidorov, A. YU. Vlasov, L.A. Voronin BINP SB RAS, Novosibirsk, Russia
	The report describes a series of industrial accelerators type ILU. Lists their basic parameters and characteristics. Presents data on their application in the cable industry, medicine and other fields. Reports on experiments with food products. Discusses the new features and technologes of the application of accelerators ILU in the food industry. Discusses problems in the Russian legislation related to the treatment of foodstuffs by ionizing radiation.
	Slides THCAMH02 [37.047 MB]
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THCAMH04	MCC-30/15 Cyclotron-based System for Production of Radionuclides Project.	cyclotron, target, ion, diagnostics	114
	A.P. Strokach, Yu.N. Gavrish, S.V. Grigorenko, V.I. Grigoriev, M.L. Klopenkov, R.M. Klopenkov, V.G. Mudrolyubov, G.V. Muraviov, V.I. Nikishkin, V.I. Ponomarenko NIIEFA, St. Petersburg, Russia
	The projected MCC-30/15 cyclotron system is intended for operation in high-technology nuclear medicine centers. The system consists of a cyclotron, target systems for production of radionuclides in liquid, gaseous and solid states and a beamline for transport of accelerated ions to final units. The updated MCC-30/15 cyclotron with new systems for external injection, RF power supply and acceleration will ensure accelerated proton and deuteron beams in energy ranges of 15 - 30 and 9 - 15 MeV and currents not lower than 200 and 70 mkA respectively. Target systems are equipped with systems for remote replacement of gaseous and liquid targets. Modular configuration of the beamline will allow the production of isotopes and carrying out of researches to be performed in separate experimental halls.
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FRCAMH01	Status of the Nuclotron	booster, controls, experiment, TANGO	150
	A.O. Sidorin, N.N. Agapov, A.V. Alfeev, V. Andreev, V. Batin, O.I. Brovko, V.V. Bugaev, A.V. Butenko, D.E. Donets, A.V. Eliseev, V.V. Fimushkin, E.V. Gorbachev, A. Govorov, A.Yu. Grebentsov, E.V. Ivanov, V. Karpinsky, H.G. Khodzhibagiyan, A. Kirichenko, V. Kobets, A.D. Kovalenko, O.S. Kozlov, K.A. Levterov, V.A. Mikhailov, V.A. Monchinsky, A. Nesterov, Yu.M. Nozhenko, A.L. Osipenkov, S. Romanov, P.A. Rukojatkin, A.A. Shurygin, I. Slepnev, V. Slepnev, A.V. Smirnov, E. Syresin, G.V. Trubnikov, A. Tuzikov, B. Vasilishin, V. Volkov JINR, Dubna, Moscow Region, Russia A. Belov RAS/INR, Moscow, Russia I.V. Gorelyshev, A.V. Philippov JINR/VBLHEP, Dubna, Moscow region, Russia A.O. Sidorin St. Petersburg University, St. Petersburg, Russia
	Since last RuPAC two runs of the Nuclotron operation were performed: in January - March of 2015 and June 2016. Presently we are providing the run, which has been started at the end of October and will be continued up to the end of December. The facility development is aimed to the performance increase for current physical program realization and preparation to the NICA Booster construction and Baryonic Matter at Nuclotron experiment.
	Slides FRCAMH01 [20.777 MB]
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TUCASH06	Progress in CW Mode Electron Resonance Accelerator BETA-8 Development	electron, cavity, resonance, power-supply	185
	A.V. Telnov VNIIEF, Sarov, Russia
	This paper presents the status of powerful linear electron accelerator BETA-8 development. The accelerator is operating in CW mode and used for ionizing radiation research. The basic constituent of accelerator is coaxial half-wave resonator excited on T1 wave. Required electron beam energy is attained by multiple passing through central transversal plane of resonator. Electron beam iterative passing is realized by turning magnets located on resonator outwalls. The main parameters of the accelerator are: beam output energy 1.5 - 7.5 MeV, average power up to 300 kW, operating frequency 100 MHz. By now the main components of facility, namely, coaxial resonator, three HF generator units each with output power 180 kW, HF power summation device, the unit of power input (UPI) designed to transfer HF signal of 600 kW have been designed and manufactured. Electron beam transport system project consisting of up to five full sequential passes through accelerating resonator has been developed. Turning electromagnets have been designed and manufactured. HF parameters measurements for coaxial resonator assembled with UPI have been realized at low HF power level. All HF generator units and HF power summation devices have been tested. HF electron injector has been designed, manufactured and tested. The accelerator testing is supposed to be carried out in one HF generator unit supply mode.
	Slides TUCASH06 [2.798 MB]
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THXSH01	Development of the INR Linear Accelerator DTL RF System	vacuum, cavity, DTL, rf-amplifier	191
	A.I. Kvasha, V.L. Serov RAS/INR, Moscow, Russia A. Feschenko MIPT, Dolgoprudniy, Moscow Region, Russia
	The regular INR DTL RF system operation began in 1992. By this point three new type of vacuum tube, designed purposely for INR linear accelerator, were manufactured at OKB "Swetlana" in the amount sufficient for RF system operation during 20 years. Among them were two vacuum tubes for final RF power amplifier - GI-54A and RF driver - GI-51A and also vacuum tube for powerful anode modulator - GMI-44A. In the late 80s manufacture of these vacuum tubes was stopped and since 1990 designing of new vacuum tube for RF output power amplifier instead of GI-54A was started. The new vacuum tube GI-71A with output RF power up to 3 MW in pulse, plate power dissipation up to 120 kW and power gain about 10 was simpler and less expensive in comparison with GI-54A. The transition to new vacuum tube began in 1999 and finished in 2014. Successful testing of GI-57A as RF driver, fulfilled in 2008, opened the possibility of replacement GI-51A. As for GMI-44A replacement there are no analogues, produced in Russian federation, and, as it turned out, the only option was GI-71A again. Below some problems, connected with the vacuum tubes replacement, as well as main results of twenty years DTL RF system operation are considered.
	Slides THXSH01 [4.748 MB]
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THCASH01	Effective RF Deflecting Structures for Bunch Rotation and Deflection	emittance, linac, 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	linac, electron, diagnostics, ion	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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TUPSA034	520 MeV TRIUMF Cyclotron RF System: Maintenance, Tuning and Protection	TRIUMF, cyclotron, vacuum, simulation	285
	N.V. Avreline, T. Au, I.V. Bylinskii, B. Jakovljevic, V. Zvyagintsev TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada C.D. Bartlett University of Victoria, Victoria BC, Canada
	Funding: TRIUMF receives federal funding via a contribution agreement through the National Research Council of Canada. 1 MW CW 23 MHz RF system of the TRIUMF's 520 MeV Cyclotron has been in operation for over 40 years. Continuous development of the RF power amplifiers, the waveguide system and the measurement and protection devices provides reliable operation and improves the performance of the RF System. In this article, operation and maintenance procedures of this RF system are analysed and recent as well as future upgrades are being analysed and discussed. In particular, we discuss the improvements of the transmission line's VSWR monitor and its effect on the protection of the RF system against RF breakdowns and sparks. We discuss the new version of the input circuit that was installed, tested and is currently used in the final stage of RF power amplifier. We analyse various schematics and configurations of the Intermediate Power Amplifier (IPA) to be deployed in the future.
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TUPSA037	Powerfull RF Triode as Anode Modulator Vacuum Tube	vacuum, cathode, impedance, DTL	294
	A.I. Kvasha, V.L. Serov RAS/INR, Moscow, Russia
	For 20 years modulator vacuum tube GMI-44A successfully operated in DTL RF system of INR Linac. The vacuum tube had been designed and manufactured at OKB "Swetlana" in the 70s-80s of the last century. The quantity of manufactured tubes - about 80, had allowed the accelerator operating till now. Manufacture of the tubes was stopped In the mid 80s. Attempts of the GMI-44A manufacture restoration or repair were unsuccessful ones. As it turned out, the only decision in the circumstances was using of 200 MHz powerful pulse triode GI-71A as modulator tube. The vacuum tubes GI-71A were installed for the last ten years in all output RF power amplifiers (PA) of INR Linac instead of RF pulse triode GI-54A. In the paper some problems appearing after modulator vacuum tube replacement are discussed.
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WEPSB010	The Use of Multi-Objective Genetic Algorithms for Accelerator and Light Source Optimization	emittance, lattice, dynamic-aperture, quadrupole	376
	Y.A. Fomin, V. Korchuganov, A.S. Smygacheva NRC, Moscow, Russia
	Funding: The reported study was funded by RFBR according to the research project No. 16-32-00336 mol_a. The nonlinear effects are very important in the development of new accelerators and synchrotron light sources. Nowadays they are one of the main factors limiting the achievement of the required facility parameters. In many cases in the development of new accelerators the analytical estimations give very coarse results and in some cases they don't apply at all. Therefore, the best way to research and design accelerators is to use numerical simulation. Nevertheless, very often during complex physical process simulation (taking into account many nonlinear effects) the use of classical optimization methods is difficult and does not give the desired results. The article deals with the application of multi-objective optimization using genetic algorithms for accelerators and light sources. These algorithms allow both simple linear and complex nonlinear accelerator structures to be optimized with the same effectiveness to achieve the required facility parameters.
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WEPSB014	Symmetrical Parameterization for 6D Fully Coupled One-Turn Transport Matrix	coupling, emittance, lattice, synchrotron	389
	S.A. Glukhov BINP SB RAS, Novosibirsk, Russia
	Symmetry properties of 6D and 4D one-turn symplectic transport matrices were studied. A new parameterization was proposed for 6D matrix, which is an extension of the Lebedev-Bogacz parameterization for 4D case. The parameterization is fully symmetric relative to radial, vertical and longitudinal motion. It can be useful for lattices with strong coupling between all degrees of freedom.
	Poster WEPSB014 [0.908 MB]
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WEPSB020	On a New Approach for Description of Self-Consistent Distributions for a Charged Particle Beam	distributed, electron, linac, 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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WEPSB032	Numerical Analysis of Cavity Mode Operation and Electron Beam Dynamics in Lebedev Institute Microtron	microtron, electron, cavity, simulation	428
	V.S. Dyubkov, Y.A. Bashmakov, Y. Lozeev MEPhI, Moscow, Russia Y.A. Bashmakov LPI, Moscow, Russia
	Dynamics of electrons in classic microtron is studied. 3D cavity model is developed and electromagnetic field distribution is simulated. Dependence of output beam parameters on microtron operation mode is investigated and discussed.
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WEPSB041	Stochastic Cooling System at NICA Project	pick-up, kicker, collider, luminosity	455
	I.V. Gorelyshev, A.O. Sidorin JINR/VBLHEP, Dubna, Moscow region, Russia N. Shurkhno, G.V. Trubnikov JINR, Dubna, Moscow Region, Russia
	Stochastic cooling system is one of the crucial elements for luminosity preservation at NICA accelerator-collider complex. The foundation of main parameters of the stochastic cooling system is provided. The preparatory experimental work for longitudinal stochastic cooling was performed at Nuclotron accelerator. The description of Nuclotron system components, adjustment algorithms and remote control is given.
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WEPSB042	Commissioning of Electron Cooling Devices at HIRFL-CSR	electron, ion, experiment, high-voltage	458
	X.D. Yang, G.H. Li, J. Li, X.M. Ma, L.J. Mao, M.T. Tang, T.L. Yan IMP/CAS, Lanzhou, People's Republic of China
	Funding: National Natural Science Foundation of China, NSFC Grant No. 11375245 Electron cooling plays an important role in the Heavy Ion Research Facility of Lanzhou cooler storage ring(HIRFL-CSR). Two electron coolers were equipped in main ring(CSRm) and experimental ring(CSRe) in HIRFL-CSR respectively. Two electron cooling devices have commissioned for twelve years since they were installed and completed in 2004. The function and operation procedure of electron cooler were presented in this report. Their performance and the highlights of experiments results were described. Their commission and optimization were summarized here. The issues and troubles during the commission were enumerated and collected in this presentation. The future upgrade and improvement were suggested, and the new operation scenario and requirement were proposed.
	Poster WEPSB042 [0.902 MB]
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THPSC006	Simulation of Precision Magnetic Shielding System for Beam Injectors in Tokamaks	plasma, shielding, simulation, ion	550
	A.M. Bazarov, V.M. Amoskov, V.A. Belyakov, E.I. Gapionok, V.P. Kukhtin, E.A. Lamzin, S.E. Sytchevsky NIIEFA, St. Petersburg, Russia V.A. Belyakov, S.E. Sytchevsky Saint Petersburg State University, Saint Petersburg, Russia Y. Gribov ITER Organization, St. Paul lez Durance, France
	Beam injectors in tokamaks are utilized for plasma heating and diagnostics. Due to the relatively large distance between the injectors and plasma, the tokamak stray magnetic field inside injectors during the operation should be very low (down to the tenths of Gauss) to avoid the deflection of the ion beams. The Magnetic Field Reduction System (MFRS) should be used to reduce the stray magnetic field produced by the tokamak EM systems and plasma to an acceptable level inside the injectors. In total, the complex MFRS can consist of a passive magnetic shield and active coils to provide the strict design criteria during a plasma scenario. To provide precise computations, detailed numerical models of MFRS should have the dimensions up to several tens of millions of degrees of freedom. Such problem could be solved only with the use of high-efficiency vector algorithms and parallel computations. The paper is dedicated to simulation of MFRS for beam injectors in tokamaks.
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THPSC007	Modeling Magnetic Effects of Steel Rebar of Concrete Surroundings for Electrophysical Apparatus	plasma, simulation, shielding, experiment	553
	V.M. Amoskov, A.M. Bazarov, V.A. Belyakov, M. Kaparkova, V.P. Kukhtin, E.A. Lamzin, B.V. Lyublin, S.E. Sytchevsky NIIEFA, St. Petersburg, Russia V.A. Belyakov, S.E. Sytchevsky Saint Petersburg State University, Saint Petersburg, Russia Y. Gribov ITER Organization, St. Paul lez Durance, France
	Large electrophysical apparatus (accelerators, detectors, tokamaks, stellarators) usually produce strong magnetic fields, which magnetizing surrounding ferromagnetics (steel masses). For example, concrete structures of buildings are reinforced with steel rebar that can produce a local substantial contribution into the magnetic field in the area where the service staff and magnetically sensitive equipment is located. The article describes an advanced approach to modelling magnetic properties of reinforced concrete structures taking into account the anisotropic effect due to rod layers orientations. The equivalent model has been validated in the computation of a test problem. For comparison, simulations have been carried out with a detailed 3D FE model that describes each of the steel rods. The equivalent model has required a few times less finite elements than the detailed model. A comparison of the fields obtained has demonstrated a very good match, even for the distances comparable with the rebar rod gaps.
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THPSC012	First Experience of the HTS-II Dipole Type Magnets Development at NIIEFA	dipole, permanent-magnet, controls, cryogenics	563
	I.Yu. Rodin, V.M. Amoskov, E.N. Andreev, A.A. Dyomina, V.A. Glukhih, V.P. Kukhtin, E.A. Lamzin, E.R. Zapretilina NIIEFA, St. Petersburg, Russia V.A. Belyakov, S.E. Sytchevsky Saint Petersburg State University, Saint Petersburg, Russia S.V. Samoilenkov JSC SuperOx, Moscow, Russia
	The possibility to design, manufacture and test the dipole type magnets from the second generation high-temperature superconductors (HTS-II like YBCO and ReBCO) was demonstrated at the Efremov Institute. The paper describes available computation techniques, design approaches and manufacturing equipment, which could be used to meet the modern requirements for the magnets of accelerators, research equipment, magnet levitation systems etc. The manufacturing equipment comprises the winding lines and insulating devices to provide different configurations and insulating schemes of coils. Additionally, an equipment to produce the Roebel-cable for high current applications was procured and put in operation. As an example, the results of development of the HTC-II dipole type magnets for the different kind dummies of maglev systems are presented. The ReBCO tapes produced by JSC "SuperOx" (Moscow) were used. Up to 0.5 T magnets cooled by liquid nitrogen were designed as a part of levitation system consists of permanent, HTS-II and normal conductive magnets. Comprehensive tests verified the computation results and demonstrated the readiness to develop HTS-II dipole magnets under the customer requirements.
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THPSC019	Hardware for Increasing Reliability of the Power Supply System for Corrector Magnets of the European XFEL	power-supply, controls, electron, monitoring	578
	O.V. Belikov, V.R. Kozak, E.A. Kuper, A.S. Medvedko BINP SB RAS, Novosibirsk, Russia H.-J. Eckoldt, N. Heidbrook DESY, Hamburg, Germany
	The total length of European X-ray Free-Electron Laser (XFEL) tunnels is 5,77 km. There are used about 300 corrector magnets for tuning electron beam. Every corrector magnet is fed by separate power supply. Power supplies for corrector magnets are distributed in 6 halls. So, replacing of one failed power supply produced too long pause in facility operations. The paper discussed different solutions which allow increasing reliability of corrector magnet power supply system for European XFEL.
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THPSC020	Electromagnetic Compatibility of the Power Supply System for Corrector Magnets of the European XFEL	power-supply, coupling, electromagnetic-fields, monitoring	581
	O.V. Belikov, V.R. Kozak BINP SB RAS, Novosibirsk, Russia H.-J. Eckoldt, N. Heidbrook, B. Moelck DESY, Hamburg, Germany
	The power supply system for corrector magnets of European X-ray Free-Electron Laser (XFEL) includes more than 300 pieces the precise current sources. To avoid the influence each power supplies to others power supplies the developers should consider and provide the electromagnetic compatibility of power supply system components on the designing phase. For this purpose there should be limited electromagnetic emission from power supplies. There is necessity to provide the tolerance of power supplies against electromagnetic emission, electrostatic discharges and other interference from outside. The paper presents the structural solutions which allowed to provide electromagnetic compatibility and results of testing the developed power supplies.
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THPSC028	Switching Network Units for High Currents and Voltages or Plasma Applications	plasma, network, controls, solenoid	603
	M.P. Pretelli, F. Burini, G.T. Taddia, S.M. Tenconi OCEM, Valsamoggia, Italy A. Lampasi, P. Zito ENEA C.R. Frascati, Frascati (Roma), Italy
	OCEM and ENEA gained a wide experience in the design and experimental characterization of fast and accurate switching systems for high DC currents, as required to supply magnets and superconductors. The exploited idea consists in inserting an electronic switch in parallel to a light electromechanical switch in air to combine the benefits of both devices. The electronic switch is turned on and off to support the electromechanical commutations limiting their jitter and the arcs that would reduce the system lifetime. During the already performed tests, DC currents up to 20 kA were diverted in less than 100 mks with good repeatability. In case of emergency, the current can be interrupted in few tens of milliseconds. A resistor can be inserted in parallel to the switch to discharge inductive loads or to produce desired overvoltages (a voltage up to 5 kV was reached in this configuration). Specific circuits were designed to preserve the components from transient voltage overshoots. This switching system is expected to work for 10000 operations without major maintenance. The developed solutions may be extended to many relevant applications as particle accelerators and HVDC networks.
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THPSC029	300 kV High-Voltage Source With Up to 15 kW Output Power	high-voltage, controls, interface, electron	606
	D.V. Senkov, I.A. Gusev, A.Yu. Protopopov, D.N. Pureskin, M.A. Scheglov BINP SB RAS, Novosibirsk, Russia
	The presented report contains the description of high-voltage source with output voltage up to 300 kV and output current up to 50 mA. The source consist of the chopper with IGBT switches working with a principle of pulse-width modulation and the full H-bridge converter with IGBT switches, both working on programmed from 15 to 25 kHz frequency, and the high voltage transformer powering the eight-stage multiplier with the additional capacity filter at output. The transformer and multiplier both are made in common volume separated on oil tank part with silicon oil for transformer and SF6 part for multiplier. The additional capacity filter provides low ripple and noise level in working range of output currents. The source can operate in normal mode with series of high-voltage breakdown in output voltage. In the high-voltage breakdown the released in load and matching circuit energy is less than 40 J at maximum operating voltage 300kV. The efficiency of system is more than 80% at the nominally output power 15 kW. The description of the source and the test results are presented.
	Poster THPSC029 [1.218 MB]
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THPSC049	Dielectric Chart as a Tool for Diagnosis of Dielectric Materials	diagnostics, dipole, impedance, polarization	641
	V.A. Klemeshev, A.G. Karpov St. Petersburg State University, St. Petersburg, Russia
	One of the most informative diagnostic methods dielectric materials is the analysis of the complex permittivity depending on the frequency of the electric field. Dielectric chart is the dependence of the imaginary part of the complex permittivity of its real part. Thus, difference between the real dielectric chart from the reference or change it during the operation can be a means of diagnostics of dielectric materials. Dielectric chart in the classical theory of Debye is a semicircle with its center lying on the real axis. For solid dielectric the dielectric chart deviation from the semicircle can be quite large, but it still remains a circular arc. This deviation is characterized by parameter a (in the case of the Debye a=0). To clarify the physical meaning of the deviations of the experimental data on the Debye theory, expressed in the value of a, several possible causes have been considered: the effect hindered reorientation of dipoles, the effect of the non-sphericity of the molecules, the complex nature of viscosity. However, the main cause of deviations, in our opinion, is the availability of the distribution of relaxation times around a central relaxation time, in particular, due to defects in the sample. Gaussian distribution width increases rapidly with increasing a. In this paper we propose an algorithm for calculating a, allowing you to quickly determine the condition of the sample on a single parameter. Karpov A.G., Egorov N.V. An Automated dielectrometer. // Pribory i tehnika eksperimenta.- 1999.- 6.- P.63-67.
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THPSC074	Longitudinal Beam Distribution Measurements in Damping Ring of VEPP-5 Injection Complex	damping, injection, impedance, electron	705
	V.V. Balakin, O. Anchugov, D.E. Berkaev, F.A. Emanov, G.Y. Kurkin, O.I. Meshkov BINP SB RAS, Novosibirsk, Russia V.L. Dorokhov BINP, Novosibirsk, Russia
	Injection Complex VEPP-5 was turned into operation in the end of 2015 in the Budker Institute of Nuclear Physics (Novosibirsk, Russia). The main task of the facility is production, acceleration and transportation of high intensity electron and positron beams for two BINP's colliders. Now, VEPP-5 successfully delivers electron and positron beams to the collider VEPP-2000 and ready to start operation with the acceleration complex VEPP-4M. Beam diagnostics issues are very important for VEPP-5 facility tuning during the operation. Longitudinal beam diagnostic based on synchrotron radiation in the VEPP-5 Damping Ring is presented in the article. Equipment operation principle, main measurement results and future prospects are presented in this paper.
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THPSC076	Host-Based System to Control the Accelerator	controls, timing, data-acquisition, feedback	709
	V.N. Zamriy JINR, Dubna, Moscow Region, Russia
	The report discusses development of the host-based data acquisition system to control the accelerator. We consider modes of timing and allocation of operations of the system node. The time of any working cycle, rate of a data flow and an amount of serviced tasks are coordinated with characteristics of the node. Estimations of the readout rate of the data and the waiting time demonstrate the system efficiency. The data acquisition technique has been developed to provide checking of pulse parameters and control the linac LUE-200 of the neutron source IREN. Ju. Becher et al. "The LUE-200 accelerator at the IREN facility: current status and development", Physics of Elementary Particles and Nuclei: Letters, 11, 1029-1039 (2014).
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THPSC085	Present Status of VEPP-5 Injection Complex Control System	controls, injection, software, network	730
	F.A. Emanov, D.E. Berkaev, D. Bolkhovityanov, P.B. Cheblakov BINP SB RAS, Novosibirsk, Russia
	VEPP-5 injection complex is being put into operation as beam source of VEPP-2000 and VEPP-4 colliders at the end of 2016. Its control system is being upgraded in order to reliably work with beam users and increase its manageability computer infrastructure was reconsidered to provide high availability and flexibility through virtualization of control servers. The paper presents architecture and implementation of complex computer infrastructure. A control software set based on CXv4, EPICS and VCAS frameworks under operating system Linux deals with a set of CAN, CAMAC and Ethernet specialized hardware. The software and hardware architecture and implementation is described.
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Paper

Title

Other Keywords

Page

TUXMH01

The European XFEL - Status and Commissioning

linac, electron, undulator, klystron

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.

linac, proton, 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, linac, vacuum, controls

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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WECBMH02

Collector Ring Project at FAIR: Present Status

quadrupole, injection, lattice, sextupole

86

P.Yu. Shatunov, V.V. Anashin, E.A. Bekhtenev, D.E. Berkaev, M.I. Bryzgunov, D. Gurov, A.S. Kasaev, V.V. Kolmogorov, I. Koop, A.A. Krasnov, O.I. Meshkov, Yu. A. Rogovsky, T.V. Rybitskaya, A.V. Semenov, Y.M. Shatunov, S.V. Shiyankov, D.B. Shwartz, A.A. Starostenko, A.V. Sukhanov, A.S. Tsyganov, A.V. Utkin
BINP SB RAS, Novosibirsk, Russia

In November 2013, the FAIR management delegated the responsibility for the technical design, construction, installation, and commissioning of the whole CR and its components from GSI to Budker Institute of Nuclear Physics (BINP). Since that time a lot of modifications of the original design were made aiming to improve the beam parameters and the machine performance. This work shows the present status of the development.

Slides WECBMH02 [20.497 MB]

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THCAMH02

Electron Accelerators Series ILU and Prospects of Their Application in the Food Industry

electron, radiation, acceleration, high-voltage

108

V.O. Tkachenko, V.V. Bezuglov, A.A. Bryazgin, B.L. Faktorovich, V.A. Gorbunov, M.V. Korobeynikov, V.E. Nekhaev, A.D. Panfilov, V.M. Radchenko, E.A. Shtarklev, A.V. Sidorov, A. YU. Vlasov, L.A. Voronin
BINP SB RAS, Novosibirsk, Russia

The report describes a series of industrial accelerators type ILU. Lists their basic parameters and characteristics. Presents data on their application in the cable industry, medicine and other fields. Reports on experiments with food products. Discusses the new features and technologes of the application of accelerators ILU in the food industry. Discusses problems in the Russian legislation related to the treatment of foodstuffs by ionizing radiation.

Slides THCAMH02 [37.047 MB]

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THCAMH04

MCC-30/15 Cyclotron-based System for Production of Radionuclides Project.

cyclotron, target, ion, diagnostics

114

A.P. Strokach, Yu.N. Gavrish, S.V. Grigorenko, V.I. Grigoriev, M.L. Klopenkov, R.M. Klopenkov, V.G. Mudrolyubov, G.V. Muraviov, V.I. Nikishkin, V.I. Ponomarenko
NIIEFA, St. Petersburg, Russia

The projected MCC-30/15 cyclotron system is intended for operation in high-technology nuclear medicine centers. The system consists of a cyclotron, target systems for production of radionuclides in liquid, gaseous and solid states and a beamline for transport of accelerated ions to final units. The updated MCC-30/15 cyclotron with new systems for external injection, RF power supply and acceleration will ensure accelerated proton and deuteron beams in energy ranges of 15 - 30 and 9 - 15 MeV and currents not lower than 200 and 70 mkA respectively. Target systems are equipped with systems for remote replacement of gaseous and liquid targets. Modular configuration of the beamline will allow the production of isotopes and carrying out of researches to be performed in separate experimental halls.

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FRCAMH01

Status of the Nuclotron

booster, controls, experiment, TANGO

150

A.O. Sidorin, N.N. Agapov, A.V. Alfeev, V. Andreev, V. Batin, O.I. Brovko, V.V. Bugaev, A.V. Butenko, D.E. Donets, A.V. Eliseev, V.V. Fimushkin, E.V. Gorbachev, A. Govorov, A.Yu. Grebentsov, E.V. Ivanov, V. Karpinsky, H.G. Khodzhibagiyan, A. Kirichenko, V. Kobets, A.D. Kovalenko, O.S. Kozlov, K.A. Levterov, V.A. Mikhailov, V.A. Monchinsky, A. Nesterov, Yu.M. Nozhenko, A.L. Osipenkov, S. Romanov, P.A. Rukojatkin, A.A. Shurygin, I. Slepnev, V. Slepnev, A.V. Smirnov, E. Syresin, G.V. Trubnikov, A. Tuzikov, B. Vasilishin, V. Volkov
JINR, Dubna, Moscow Region, Russia
A. Belov
RAS/INR, Moscow, Russia
I.V. Gorelyshev, A.V. Philippov
JINR/VBLHEP, Dubna, Moscow region, Russia
A.O. Sidorin
St. Petersburg University, St. Petersburg, Russia

Since last RuPAC two runs of the Nuclotron operation were performed: in January - March of 2015 and June 2016. Presently we are providing the run, which has been started at the end of October and will be continued up to the end of December. The facility development is aimed to the performance increase for current physical program realization and preparation to the NICA Booster construction and Baryonic Matter at Nuclotron experiment.

Slides FRCAMH01 [20.777 MB]

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TUCASH06

Progress in CW Mode Electron Resonance Accelerator BETA-8 Development

electron, cavity, resonance, power-supply

185

A.V. Telnov
VNIIEF, Sarov, Russia

This paper presents the status of powerful linear electron accelerator BETA-8 development. The accelerator is operating in CW mode and used for ionizing radiation research. The basic constituent of accelerator is coaxial half-wave resonator excited on T1 wave. Required electron beam energy is attained by multiple passing through central transversal plane of resonator. Electron beam iterative passing is realized by turning magnets located on resonator outwalls. The main parameters of the accelerator are: beam output energy 1.5 - 7.5 MeV, average power up to 300 kW, operating frequency 100 MHz. By now the main components of facility, namely, coaxial resonator, three HF generator units each with output power 180 kW, HF power summation device, the unit of power input (UPI) designed to transfer HF signal of 600 kW have been designed and manufactured. Electron beam transport system project consisting of up to five full sequential passes through accelerating resonator has been developed. Turning electromagnets have been designed and manufactured. HF parameters measurements for coaxial resonator assembled with UPI have been realized at low HF power level. All HF generator units and HF power summation devices have been tested. HF electron injector has been designed, manufactured and tested. The accelerator testing is supposed to be carried out in one HF generator unit supply mode.

Slides TUCASH06 [2.798 MB]

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THXSH01

Development of the INR Linear Accelerator DTL RF System

vacuum, cavity, DTL, rf-amplifier

191

A.I. Kvasha, V.L. Serov
RAS/INR, Moscow, Russia
A. Feschenko
MIPT, Dolgoprudniy, Moscow Region, Russia

The regular INR DTL RF system operation began in 1992. By this point three new type of vacuum tube, designed purposely for INR linear accelerator, were manufactured at OKB "Swetlana" in the amount sufficient for RF system operation during 20 years. Among them were two vacuum tubes for final RF power amplifier - GI-54A and RF driver - GI-51A and also vacuum tube for powerful anode modulator - GMI-44A. In the late 80s manufacture of these vacuum tubes was stopped and since 1990 designing of new vacuum tube for RF output power amplifier instead of GI-54A was started. The new vacuum tube GI-71A with output RF power up to 3 MW in pulse, plate power dissipation up to 120 kW and power gain about 10 was simpler and less expensive in comparison with GI-54A. The transition to new vacuum tube began in 1999 and finished in 2014. Successful testing of GI-57A as RF driver, fulfilled in 2008, opened the possibility of replacement GI-51A. As for GMI-44A replacement there are no analogues, produced in Russian federation, and, as it turned out, the only option was GI-71A again. Below some problems, connected with the vacuum tubes replacement, as well as main results of twenty years DTL RF system operation are considered.

Slides THXSH01 [4.748 MB]

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THCASH01

Effective RF Deflecting Structures for Bunch Rotation and Deflection

emittance, linac, 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

linac, electron, diagnostics, ion

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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TUPSA034

520 MeV TRIUMF Cyclotron RF System: Maintenance, Tuning and Protection

TRIUMF, cyclotron, vacuum, simulation

285

N.V. Avreline, T. Au, I.V. Bylinskii, B. Jakovljevic, V. Zvyagintsev
TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
C.D. Bartlett
University of Victoria, Victoria BC, Canada

Funding: TRIUMF receives federal funding via a contribution agreement through the National Research Council of Canada.
1 MW CW 23 MHz RF system of the TRIUMF's 520 MeV Cyclotron has been in operation for over 40 years. Continuous development of the RF power amplifiers, the waveguide system and the measurement and protection devices provides reliable operation and improves the performance of the RF System. In this article, operation and maintenance procedures of this RF system are analysed and recent as well as future upgrades are being analysed and discussed. In particular, we discuss the improvements of the transmission line's VSWR monitor and its effect on the protection of the RF system against RF breakdowns and sparks. We discuss the new version of the input circuit that was installed, tested and is currently used in the final stage of RF power amplifier. We analyse various schematics and configurations of the Intermediate Power Amplifier (IPA) to be deployed in the future.

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TUPSA037

Powerfull RF Triode as Anode Modulator Vacuum Tube

vacuum, cathode, impedance, DTL

294

A.I. Kvasha, V.L. Serov
RAS/INR, Moscow, Russia

For 20 years modulator vacuum tube GMI-44A successfully operated in DTL RF system of INR Linac. The vacuum tube had been designed and manufactured at OKB "Swetlana" in the 70s-80s of the last century. The quantity of manufactured tubes - about 80, had allowed the accelerator operating till now. Manufacture of the tubes was stopped In the mid 80s. Attempts of the GMI-44A manufacture restoration or repair were unsuccessful ones. As it turned out, the only decision in the circumstances was using of 200 MHz powerful pulse triode GI-71A as modulator tube. The vacuum tubes GI-71A were installed for the last ten years in all output RF power amplifiers (PA) of INR Linac instead of RF pulse triode GI-54A. In the paper some problems appearing after modulator vacuum tube replacement are discussed.

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WEPSB010

The Use of Multi-Objective Genetic Algorithms for Accelerator and Light Source Optimization

emittance, lattice, dynamic-aperture, quadrupole

376

Y.A. Fomin, V. Korchuganov, A.S. Smygacheva
NRC, Moscow, Russia

Funding: The reported study was funded by RFBR according to the research project No. 16-32-00336 mol_a.
The nonlinear effects are very important in the development of new accelerators and synchrotron light sources. Nowadays they are one of the main factors limiting the achievement of the required facility parameters. In many cases in the development of new accelerators the analytical estimations give very coarse results and in some cases they don't apply at all. Therefore, the best way to research and design accelerators is to use numerical simulation. Nevertheless, very often during complex physical process simulation (taking into account many nonlinear effects) the use of classical optimization methods is difficult and does not give the desired results. The article deals with the application of multi-objective optimization using genetic algorithms for accelerators and light sources. These algorithms allow both simple linear and complex nonlinear accelerator structures to be optimized with the same effectiveness to achieve the required facility parameters.

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WEPSB014

Symmetrical Parameterization for 6D Fully Coupled One-Turn Transport Matrix

coupling, emittance, lattice, synchrotron

389

S.A. Glukhov
BINP SB RAS, Novosibirsk, Russia

Symmetry properties of 6D and 4D one-turn symplectic transport matrices were studied. A new parameterization was proposed for 6D matrix, which is an extension of the Lebedev-Bogacz parameterization for 4D case. The parameterization is fully symmetric relative to radial, vertical and longitudinal motion. It can be useful for lattices with strong coupling between all degrees of freedom.

Poster WEPSB014 [0.908 MB]

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WEPSB020

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

distributed, electron, linac, 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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WEPSB032

Numerical Analysis of Cavity Mode Operation and Electron Beam Dynamics in Lebedev Institute Microtron

microtron, electron, cavity, simulation

428

V.S. Dyubkov, Y.A. Bashmakov, Y. Lozeev
MEPhI, Moscow, Russia
Y.A. Bashmakov
LPI, Moscow, Russia

Dynamics of electrons in classic microtron is studied. 3D cavity model is developed and electromagnetic field distribution is simulated. Dependence of output beam parameters on microtron operation mode is investigated and discussed.

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WEPSB041

Stochastic Cooling System at NICA Project

pick-up, kicker, collider, luminosity

455

I.V. Gorelyshev, A.O. Sidorin
JINR/VBLHEP, Dubna, Moscow region, Russia
N. Shurkhno, G.V. Trubnikov
JINR, Dubna, Moscow Region, Russia

Stochastic cooling system is one of the crucial elements for luminosity preservation at NICA accelerator-collider complex. The foundation of main parameters of the stochastic cooling system is provided. The preparatory experimental work for longitudinal stochastic cooling was performed at Nuclotron accelerator. The description of Nuclotron system components, adjustment algorithms and remote control is given.

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WEPSB042

Commissioning of Electron Cooling Devices at HIRFL-CSR

electron, ion, experiment, high-voltage

458

X.D. Yang, G.H. Li, J. Li, X.M. Ma, L.J. Mao, M.T. Tang, T.L. Yan
IMP/CAS, Lanzhou, People's Republic of China

Funding: National Natural Science Foundation of China, NSFC Grant No. 11375245
Electron cooling plays an important role in the Heavy Ion Research Facility of Lanzhou cooler storage ring(HIRFL-CSR). Two electron coolers were equipped in main ring(CSRm) and experimental ring(CSRe) in HIRFL-CSR respectively. Two electron cooling devices have commissioned for twelve years since they were installed and completed in 2004. The function and operation procedure of electron cooler were presented in this report. Their performance and the highlights of experiments results were described. Their commission and optimization were summarized here. The issues and troubles during the commission were enumerated and collected in this presentation. The future upgrade and improvement were suggested, and the new operation scenario and requirement were proposed.

Poster WEPSB042 [0.902 MB]

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THPSC006

Simulation of Precision Magnetic Shielding System for Beam Injectors in Tokamaks

plasma, shielding, simulation, ion

550

A.M. Bazarov, V.M. Amoskov, V.A. Belyakov, E.I. Gapionok, V.P. Kukhtin, E.A. Lamzin, S.E. Sytchevsky
NIIEFA, St. Petersburg, Russia
V.A. Belyakov, S.E. Sytchevsky
Saint Petersburg State University, Saint Petersburg, Russia
Y. Gribov
ITER Organization, St. Paul lez Durance, France

Beam injectors in tokamaks are utilized for plasma heating and diagnostics. Due to the relatively large distance between the injectors and plasma, the tokamak stray magnetic field inside injectors during the operation should be very low (down to the tenths of Gauss) to avoid the deflection of the ion beams. The Magnetic Field Reduction System (MFRS) should be used to reduce the stray magnetic field produced by the tokamak EM systems and plasma to an acceptable level inside the injectors. In total, the complex MFRS can consist of a passive magnetic shield and active coils to provide the strict design criteria during a plasma scenario. To provide precise computations, detailed numerical models of MFRS should have the dimensions up to several tens of millions of degrees of freedom. Such problem could be solved only with the use of high-efficiency vector algorithms and parallel computations. The paper is dedicated to simulation of MFRS for beam injectors in tokamaks.

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THPSC007

Modeling Magnetic Effects of Steel Rebar of Concrete Surroundings for Electrophysical Apparatus

plasma, simulation, shielding, experiment

553

V.M. Amoskov, A.M. Bazarov, V.A. Belyakov, M. Kaparkova, V.P. Kukhtin, E.A. Lamzin, B.V. Lyublin, S.E. Sytchevsky
NIIEFA, St. Petersburg, Russia
V.A. Belyakov, S.E. Sytchevsky
Saint Petersburg State University, Saint Petersburg, Russia
Y. Gribov
ITER Organization, St. Paul lez Durance, France

Large electrophysical apparatus (accelerators, detectors, tokamaks, stellarators) usually produce strong magnetic fields, which magnetizing surrounding ferromagnetics (steel masses). For example, concrete structures of buildings are reinforced with steel rebar that can produce a local substantial contribution into the magnetic field in the area where the service staff and magnetically sensitive equipment is located. The article describes an advanced approach to modelling magnetic properties of reinforced concrete structures taking into account the anisotropic effect due to rod layers orientations. The equivalent model has been validated in the computation of a test problem. For comparison, simulations have been carried out with a detailed 3D FE model that describes each of the steel rods. The equivalent model has required a few times less finite elements than the detailed model. A comparison of the fields obtained has demonstrated a very good match, even for the distances comparable with the rebar rod gaps.

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THPSC012

First Experience of the HTS-II Dipole Type Magnets Development at NIIEFA

dipole, permanent-magnet, controls, cryogenics

563

I.Yu. Rodin, V.M. Amoskov, E.N. Andreev, A.A. Dyomina, V.A. Glukhih, V.P. Kukhtin, E.A. Lamzin, E.R. Zapretilina
NIIEFA, St. Petersburg, Russia
V.A. Belyakov, S.E. Sytchevsky
Saint Petersburg State University, Saint Petersburg, Russia
S.V. Samoilenkov
JSC SuperOx, Moscow, Russia

The possibility to design, manufacture and test the dipole type magnets from the second generation high-temperature superconductors (HTS-II like YBCO and ReBCO) was demonstrated at the Efremov Institute. The paper describes available computation techniques, design approaches and manufacturing equipment, which could be used to meet the modern requirements for the magnets of accelerators, research equipment, magnet levitation systems etc. The manufacturing equipment comprises the winding lines and insulating devices to provide different configurations and insulating schemes of coils. Additionally, an equipment to produce the Roebel-cable for high current applications was procured and put in operation. As an example, the results of development of the HTC-II dipole type magnets for the different kind dummies of maglev systems are presented. The ReBCO tapes produced by JSC "SuperOx" (Moscow) were used. Up to 0.5 T magnets cooled by liquid nitrogen were designed as a part of levitation system consists of permanent, HTS-II and normal conductive magnets. Comprehensive tests verified the computation results and demonstrated the readiness to develop HTS-II dipole magnets under the customer requirements.

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THPSC019

Hardware for Increasing Reliability of the Power Supply System for Corrector Magnets of the European XFEL

power-supply, controls, electron, monitoring

578

O.V. Belikov, V.R. Kozak, E.A. Kuper, A.S. Medvedko
BINP SB RAS, Novosibirsk, Russia
H.-J. Eckoldt, N. Heidbrook
DESY, Hamburg, Germany

The total length of European X-ray Free-Electron Laser (XFEL) tunnels is 5,77 km. There are used about 300 corrector magnets for tuning electron beam. Every corrector magnet is fed by separate power supply. Power supplies for corrector magnets are distributed in 6 halls. So, replacing of one failed power supply produced too long pause in facility operations. The paper discussed different solutions which allow increasing reliability of corrector magnet power supply system for European XFEL.

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THPSC020

Electromagnetic Compatibility of the Power Supply System for Corrector Magnets of the European XFEL

power-supply, coupling, electromagnetic-fields, monitoring

581

O.V. Belikov, V.R. Kozak
BINP SB RAS, Novosibirsk, Russia
H.-J. Eckoldt, N. Heidbrook, B. Moelck
DESY, Hamburg, Germany

The power supply system for corrector magnets of European X-ray Free-Electron Laser (XFEL) includes more than 300 pieces the precise current sources. To avoid the influence each power supplies to others power supplies the developers should consider and provide the electromagnetic compatibility of power supply system components on the designing phase. For this purpose there should be limited electromagnetic emission from power supplies. There is necessity to provide the tolerance of power supplies against electromagnetic emission, electrostatic discharges and other interference from outside. The paper presents the structural solutions which allowed to provide electromagnetic compatibility and results of testing the developed power supplies.

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THPSC028

Switching Network Units for High Currents and Voltages or Plasma Applications

plasma, network, controls, solenoid

603

M.P. Pretelli, F. Burini, G.T. Taddia, S.M. Tenconi
OCEM, Valsamoggia, Italy
A. Lampasi, P. Zito
ENEA C.R. Frascati, Frascati (Roma), Italy

OCEM and ENEA gained a wide experience in the design and experimental characterization of fast and accurate switching systems for high DC currents, as required to supply magnets and superconductors. The exploited idea consists in inserting an electronic switch in parallel to a light electromechanical switch in air to combine the benefits of both devices. The electronic switch is turned on and off to support the electromechanical commutations limiting their jitter and the arcs that would reduce the system lifetime. During the already performed tests, DC currents up to 20 kA were diverted in less than 100 mks with good repeatability. In case of emergency, the current can be interrupted in few tens of milliseconds. A resistor can be inserted in parallel to the switch to discharge inductive loads or to produce desired overvoltages (a voltage up to 5 kV was reached in this configuration). Specific circuits were designed to preserve the components from transient voltage overshoots. This switching system is expected to work for 10000 operations without major maintenance. The developed solutions may be extended to many relevant applications as particle accelerators and HVDC networks.

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THPSC029

300 kV High-Voltage Source With Up to 15 kW Output Power

high-voltage, controls, interface, electron

606

D.V. Senkov, I.A. Gusev, A.Yu. Protopopov, D.N. Pureskin, M.A. Scheglov
BINP SB RAS, Novosibirsk, Russia

The presented report contains the description of high-voltage source with output voltage up to 300 kV and output current up to 50 mA. The source consist of the chopper with IGBT switches working with a principle of pulse-width modulation and the full H-bridge converter with IGBT switches, both working on programmed from 15 to 25 kHz frequency, and the high voltage transformer powering the eight-stage multiplier with the additional capacity filter at output. The transformer and multiplier both are made in common volume separated on oil tank part with silicon oil for transformer and SF6 part for multiplier. The additional capacity filter provides low ripple and noise level in working range of output currents. The source can operate in normal mode with series of high-voltage breakdown in output voltage. In the high-voltage breakdown the released in load and matching circuit energy is less than 40 J at maximum operating voltage 300kV. The efficiency of system is more than 80% at the nominally output power 15 kW. The description of the source and the test results are presented.

Poster THPSC029 [1.218 MB]

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THPSC049

Dielectric Chart as a Tool for Diagnosis of Dielectric Materials

diagnostics, dipole, impedance, polarization

641

V.A. Klemeshev, A.G. Karpov
St. Petersburg State University, St. Petersburg, Russia

One of the most informative diagnostic methods dielectric materials is the analysis of the complex permittivity depending on the frequency of the electric field*. Dielectric chart is the dependence of the imaginary part of the complex permittivity of its real part. Thus, difference between the real dielectric chart from the reference or change it during the operation can be a means of diagnostics of dielectric materials. Dielectric chart in the classical theory of Debye is a semicircle with its center lying on the real axis. For solid dielectric the dielectric chart deviation from the semicircle can be quite large, but it still remains a circular arc. This deviation is characterized by parameter a (in the case of the Debye a=0). To clarify the physical meaning of the deviations of the experimental data on the Debye theory, expressed in the value of a, several possible causes have been considered: the effect hindered reorientation of dipoles, the effect of the non-sphericity of the molecules, the complex nature of viscosity. However, the main cause of deviations, in our opinion, is the availability of the distribution of relaxation times around a central relaxation time, in particular, due to defects in the sample. Gaussian distribution width increases rapidly with increasing a. In this paper we propose an algorithm for calculating a, allowing you to quickly determine the condition of the sample on a single parameter.
* Karpov A.G., Egorov N.V. An Automated dielectrometer. // Pribory i tehnika eksperimenta.- 1999.- 6.- P.63-67.

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THPSC074

Longitudinal Beam Distribution Measurements in Damping Ring of VEPP-5 Injection Complex

damping, injection, impedance, electron

705

V.V. Balakin, O. Anchugov, D.E. Berkaev, F.A. Emanov, G.Y. Kurkin, O.I. Meshkov
BINP SB RAS, Novosibirsk, Russia
V.L. Dorokhov
BINP, Novosibirsk, Russia

Injection Complex VEPP-5 was turned into operation in the end of 2015 in the Budker Institute of Nuclear Physics (Novosibirsk, Russia). The main task of the facility is production, acceleration and transportation of high intensity electron and positron beams for two BINP's colliders. Now, VEPP-5 successfully delivers electron and positron beams to the collider VEPP-2000 and ready to start operation with the acceleration complex VEPP-4M. Beam diagnostics issues are very important for VEPP-5 facility tuning during the operation. Longitudinal beam diagnostic based on synchrotron radiation in the VEPP-5 Damping Ring is presented in the article. Equipment operation principle, main measurement results and future prospects are presented in this paper.

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THPSC076

Host-Based System to Control the Accelerator

controls, timing, data-acquisition, feedback

709

V.N. Zamriy
JINR, Dubna, Moscow Region, Russia

The report discusses development of the host-based data acquisition system to control the accelerator. We consider modes of timing and allocation of operations of the system node. The time of any working cycle, rate of a data flow and an amount of serviced tasks are coordinated with characteristics of the node. Estimations of the readout rate of the data and the waiting time demonstrate the system efficiency. The data acquisition technique has been developed to provide checking of pulse parameters and control the linac LUE-200 of the neutron source IREN*.
* Ju. Becher et al. "The LUE-200 accelerator at the IREN facility: current status and development", Physics of Elementary Particles and Nuclei: Letters, 11, 1029-1039 (2014).

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THPSC085

Present Status of VEPP-5 Injection Complex Control System

controls, injection, software, network

730

F.A. Emanov, D.E. Berkaev, D. Bolkhovityanov, P.B. Cheblakov
BINP SB RAS, Novosibirsk, Russia

VEPP-5 injection complex is being put into operation as beam source of VEPP-2000 and VEPP-4 colliders at the end of 2016. Its control system is being upgraded in order to reliably work with beam users and increase its manageability computer infrastructure was reconsidered to provide high availability and flexibility through virtualization of control servers. The paper presents architecture and implementation of complex computer infrastructure. A control software set based on CXv4, EPICS and VCAS frameworks under operating system Linux deals with a set of CAN, CAMAC and Ethernet specialized hardware. The software and hardware architecture and implementation is described.

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