Keyword: vacuum
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TUCAMH01 Planar Superconducting Undulator With Neutral Poles undulator, radiation, quadrupole, wiggler 21
 
  • N.A. Mezentsev, S.V. Khrushchev, V.A. Shkaruba, V.M. Syrovatin, V.M. Tsukanov
    BINP SB RAS, Novosibirsk, Russia
  
  Superconducting undulator with use of neutral poles was proposed in Budker INP. Period of the undulator is 15.6 mm. Pole gap and magnetic field are equal to 8 mm and 1.2 T correspondingly. A prototype of the undulator with 15 periods was fabricated and successfully tested. Calculations, design and test results of the prototype in the report are presented. The cryogenic and vacuum system of the undulator are discussed.  
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TUCBMH01 Status of the Kurchatov Synchrotron Light Source controls, wiggler, synchrotron, electron 27
 
  • A.G. Valentinov, A. Belkov, Y.A. Fomin, E.V. Kaportsev, V. Korchuganov, Y.V. Krylov, V.I. Moiseev, K. Moseev, N.I. Moseiko, D.G. Odintsov, S.G. Pesterev, A.S. Smygacheva, A.I. Stirin, V. Ushakov, V.L. Ushkov, A. Vernov
    NRC, Moscow, Russia
  
  The Kurchatov synchrotron light source operates in the range of synchrotron radiation from VUV up to hard X-ray. To improve facility capabilities in the last few years technical modernization of all facility systems is underway and new beam lines are constructed. In this report the present status and future plans of the Kurchatov synchrotron light source is presented.  
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TUZMH03 Status of IFMIF-EVEDA RFQ rfq, linac, 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.  
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WEZMH02 Radiocarbon analysis of different samples at BINP AMS ion, extraction, ion-source, detector 95
 
  • S. Rastigeev, A.R. Frolov, A.D. Goncharov, V. Klyuev, E.S. Konstantinov, L.A. Kutnykova, V.V. Parkhomchuk, N. Petrischev, A.V. Petrozhitskii
    BINP SB RAS, Novosibirsk, Russia
  
  The accelerator mass spectrometer (AMS) created at BINP is used for biomedical, archaeological and other applications. Present status and experimental results are described.  
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WECDMH03 A 5 to 20 MeV Electron Linear Accelerator for Metrology electron, radiation, shielding, target 102
 
  • Yu. Zuev, Z. Andreeva, M.A. Kalinichenko, A.P. Klinov, A.S. Krestianinov, O.L. Maslennikov, A.V. Tanchuk, V.V. Terentyev
    NIIEFA, St. Petersburg, Russia
  • S.G. Trofimchuk, I.I. Tsvetkov
    VNIIM, St.Petersburg, Russia
  
  The paper outlines design parameters and construction features of an electron linear accelerator to be operated in the D.I.Mendeleyev Institute for Metrology (VNIIM). The accelerator system is intended to form electron and bremsstrahlung radiation fields of variable intensity. This shall extend characteristics of the National measurement standard to be used for calibration of a space monitoring equipment, embedded measuring means for industrial accelerator facilities and others. The accelerator system consists of an electron source, resonance accelerating structure, beam-bending magnet'separator and radiation head with a block of bremsstrahlung targets, foils and collimators. An important feature of the system is spatial steadiness of radiation field at energies varied from 5 to 20 MeV and more than tenfold variation of the accelerated particle current. The status of the project will be presented as well.  
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THCEMH01 Vacuum Insulation Tandem Accelerator: Progress and Prospects neutron, ion, tandem-accelerator, proton 147
 
  • S.Yu. Taskaev, A.A. Ivanov, D.A. Kasatov, A.N. Makarov, Y.M. Ostreinov, I.M. Shchudlo, I.N. Sorokin, T. Sycheva
    BINP SB RAS, Novosibirsk, Russia
  • T.A. Bykov
    Budker INP & NSU, Novosibirsk, Russia
  • A.A. Ivanov, Ya.A. Kolesnikov, A.M. Koshkarev, E.O. Sokolova, S.Yu. Taskaev
    NSU, Novosibirsk, Russia
  
  Funding: The study was supported by the grants from the Ministry of Science of the Russian Federation, the Russian Science Foundation, Budker Institute of Nuclear Physics and Novosibirsk State University.
A promising method of treatment of many malignant tumors is the boron neutron capture therapy (BNCT)*. It provides a selective destruction of tumor cells by prior accumulation of a stable boron-10 isotope inside them and subsequent irradiation with epithermal neutrons. It is expected that accelerator based neutron sources will be created for the clinical practice. One such source could be an original source of epithermal neutrons**, created in BINP. To obtain proton beam a new type of particle accelerator is used - tandem accelerator with vacuum insulation. Generation of neutrons is carried out as a result of the threshold reaction 7Li(p, n)7Be. During 2015-2016 in the construction of tandem accelerator with vacuum insulation several changes were made. This allowed us to suppress the unwanted flow of charged particles in the accelerator, to improve its high-voltage stability, and to increase the proton beam current from 1.6 to 5 mA. Such current value is sufficient for BNCT. The report describes in detail the modernization of the accelerator, presents and discusses the results of experiments on obtaining the proton beam and the formation of neutron flux using lithium target, and declares our prospective plans. The obtained neutron beam meets the requirements of BNCT: the irradiation of cell cultures provides the destruction of cells with boron and preservation of cells without boron. Irradiation of immunodeficient mice with grafted glioblastoma results in their recovery.
*Neutron Capture Therapy. Principles and Applications. Eds: W. Sauerwein, A. Wittig, R. Moss, Y. Nakagawa. Springer, 2012.
**S. Taskaev. Accelerator based epithermal neutron source. Physics of Particles and Nuclei 46 (2015) 956-990. 		 
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FRCAMH02 Commissioning of New Light Ion RFQ Linac and First Nuclotron Run with New Injector rfq, ion, linac, ion-source 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.  
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TUCASH04 Physical Start-up of the C-80 Isochronous Cyclotron cyclotron, beam-transport, diagnostics, proton 179
 
  • Yu.N. Gavrish, A.V. Galchuck, S.V. Grigorenko, A.N. Kuzhlev, V.G. Mudrolyubov
    NIIEFA, St. Petersburg, Russia
  • D.A. Amerkanov, S.A. Artamonov, E.M. Ivanov, G.A. Riabov, V.I. Yurchenko
    PNPI, Gatchina, Leningrad District, Russia
  
  Works on the creation of a cyclotron for the acceleration of H− ions at energies ranging from 40 up to 80 MeV have been carried out over a number of years in PNPI, the National Research Centre Kurchatov Institute. The cyclotron is intended for production of a wide assortment of radioisotopes for medicine including radiation generators (Sr-Rb, Ge-Ga), proton therapy of ophthalmic diseases, tests of radioelectronic components for radiation resistance, studies in the field of nuclear physics and radiation material science. In June, 2016 physical start-up of the cyclotron was realized in the pulsed mode; the beam of ~10 mkA was obtained at the inner probe, the extracted beam at the first diagnostic device was ~8 mkA and ~7.5 mkA at the final diagnostic device of the beamline. In the near future we plan to obtain the design intensity of 100 mkA.  
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TUCASH05 The CC1-3 Cyclotron System. Installation and Test Results cyclotron, proton, controls, ion 182
 
  • V.G. Mudrolyubov, A.V. Antonov, M.A. Emeljanov, A.V. Galchuck, Yu.N. Gavrish, S.V. Grigorenko, V.I. Grigoriev, L.E. Korolev, M.T. Kozienko, A.N. Kuzhlev, A.G. Miroshnichenko, G.V. Muraviov, V.I. Nikishkin, V.I. Ponomarenko, K.E. Smirnov, Yu.I. Stogov, A.P. Strokach, S.S. Tsygankov, O.L. Veresov
    NIIEFA, St. Petersburg, Russia
  
  A unique CC1-3 cyclotron system has been installed in the Vinca Institute of Nuclear Sciences, Belgrade, Serbia to be used in the laboratory of nuclear-physical methods of the elemental analysis A compact cyclotron and a beam shaping system ensure an accelerated proton beam in a wide range of energies from 1 to 3 MeV with a spectrum width not more than 0.1%. Tests of the cyclotron system have been carried out at proton energies of 1.0, 1.7 and 3 MeV with the beam transport to the final diagnostic device.  
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THXSH01 Development of the INR Linear Accelerator DTL RF System cavity, operation, 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.  
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THCBSH02 Structure and Hardware of LIA-20 Control System controls, pulsed-power, hardware, power-supply 207
 
  • G.A. Fatkin, A.O. Baluev, A.M. Batrakov, E.A. Bekhtenev, A.G. Chupyra, E.S. Kotov, Ya.M. Macheret, V.R. Mamkin, A.V. Ottmar, A. Panov, A.V. Pavlenko, A.N. Selivanov, P.A. Selivanov, A.I. Senchenko, S.S. Serednyakov, K.S. Shtro, S.R. Singatulin, M.Yu. Vasilyev
    BINP SB RAS, Novosibirsk, Russia
  • E.A. Bekhtenev, G.A. Fatkin, A.V. Pavlenko, A.I. Senchenko, S.S. Serednyakov
    NSU, Novosibirsk, Russia
  
  The control system of a linear induction accelerator LIA-20 for radiography is presented in this paper. The accelerator is designed to provide a series of three consecutive electron pulses with energy up to 20 MeV, current 2 kA and lateral size less than 1 mm. To allow reliable operation of the whole complex, coordinated functioning of more than 700 devices must be guaranteed in time frames from milliseconds to several nanoseconds. Total number of control channels exceeds 6000. The control system structure is described and the hardware in VME and CAN standards is presented.  
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TUPSA008 Gradient Limitations for RF Accelerator on Parallel-Coupled Structure cavity, acceleration, accelerating-gradient, linac 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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TUPSA018 Experimental Facility for E-Beam Irradiation Test of Prototype IF Target in RISP target, electron, controls, radiation 253
 
  • V. Gubin
    Institute of Laser Physics, SB RAS, Novosibirsk, Russia
  • I. Chakin, S. Fadeev, M. Golkovsky, Yu. Maltseva, P.V. Martyshkin
    BINP SB RAS, Novosibirsk, Russia
  • J.Y. Kim, J.-W. Kim, Y.H. Park
    IBS, Daejeon, Republic of Korea
  
  Nowadays project RISP is developed in IBS, Daejeon. One of the main project devices is graphite targets system meant for production of rare isotopes by means of the in-flight fragmentation (IF) technique. The power inside the target system deposited by the primary beam with energy of 200 MeV/u is estimated to be around 100 kW. The target represents rotating multi-slice graphite disc cooled by thermal radiation. Necessary step of the target development is integrated test of target prototype under high power electron beam modelling real energy deposit into target. This test is planned to be held in BINP, Novosibirsk, with the use of ELV-6 accelerator. This paper presents the design of experimental facility as well as experimental program of test. Specifications of electron beam (energy close to 800 keV, size ~ 1mm, total power 30-40 kW) are discussed. Parameters and design of basic devices and systems of facility are described.  
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TUPSA027 The Study of the Helical RF Resonator for the 300 keV Nitrogen Ion CW Implanter ion, simulation, impedance, rf-amplifier 270
 
  • N.V. Avreline
    TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
  • P.G. Alexey, S.M. Polozov
    MEPhI, Moscow, Russia
  
  The helical RF resonator for the single charged 300 keV nitrogen ion CW implanter was designed, simulated in CST Microwave Studio and the results were experimentally verified. The current setup of the implanter is described as well as possible modifications to accelerate ions of other types. The results of the field distribution's RF measurements and the results of the high-power test are also presented.  
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TUPSA034 520 MeV TRIUMF Cyclotron RF System: Maintenance, Tuning and Protection operation, TRIUMF, cyclotron, 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 operation, 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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TUPSA049 Electromagnetic Field in Dielectric Concentrator for Cherenkov Radiation target, radiation, optics, diagnostics 316
 
  • S.N. Galyamin, A.A. Grigoreva, A.V. Tyukhtin, V.V. Vorobev
    Saint Petersburg State University, Saint Petersburg, Russia
  • E.S. Belonogaya
    LETI, Saint-Petersburg, Russia
  
  Funding: Work was supported by the Grant of the President of Russian Federation (No. 6765.2015.2) and the Grant from Russian Foundation for Basic Research (No. 15-32-20985).
Recently we have reported on axisymmetric dielectric concentrator for Cherenkov radiation that focuses almost the whole radiation in the vicinity of the given point (focus) located on the trajectory of the charge*. Particularly, we have shown that this structure can increase the field up to two orders of magnitude. In this report we continue investigation of this concentrating target and analyse in more detail the field near the focal point depending on parameters of the target.
* S.N. Galyamin and A.V. Tyukhtin, Phys. Rev. Lett., 113, 064802 (2014). 		 
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TUPSA064 The Infinitely Thin Field Emitter Mathematical Modeling electron, cathode, electronics 342
 
  • E.M. Vinogradova
    Saint-Petersburg State University, Saint-Petersburg, Russia
  • N.V. Egorov
    St. Petersburg State University, St. Petersburg, Russia
  • E.V. Kalaturskaja
    Saint Petersburg State University, Saint Petersburg, Russia
  
  In this work an axisymmetric diode electron-optical system based on a field emitter is simulated. The field emitter in the form of a thin filament of finite length is located on the flat substrate with the dielectric layer. The anode is a plane. The electrostatic potential distribution was found in an analytical form - in the form of Fourier-Bessel series in the whole area of the system under investigation. The coefficients of Fourier-Bessel series are the solution of the system of linear equations with constant coefficients.  
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WEPSB008 About Behavior of Electrons and Ions in the Accelerating Interval ion, electron, plasma, acceleration 371
 
  • A.S. Chikhachev
    Allrussian Electrotechnical Institute, Moskow, Russia
  • H.Y. Barminova
    MEPhI, Moscow, Russia
  
  The behavior of electron-ion ensemble accelerated in the diode is studied. Hot electrons are described by means of the distribution function which is a solution of the collisionless kinetic function depending not only from integrals of motion. To describe the cold ions the hydrodynamics equations are used. The possibility of the ion-sound velocity excess of the ions is shown. The expression for the electron gas pressure is received. The dependence of relative density of the ions on the coordinate is discussed in the case of closed phase trajectories.  
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WEPSB034 The Electromagnetic Field Structure in the Circular Waveguide with Transverse Boundary simulation, electromagnetic-fields, acceleration, radiation 434
 
  • A.A. Grigoreva
    Saint-Petersburg State University, Saint-Petersburg, Russia
  • S.N. Galyamin, A.V. Tyukhtin, V.V. Vorobev
    Saint Petersburg State University, Saint Petersburg, Russia
  
  Funding: This work was supported by Russian Foundation for Basic Research under Grant 15-02-03913.
The study of the electromagnetic field in a circular waveguide having a partial dielectric filling is of interest for a series of applications including new methods of particle acceleration. We consider the structure of the electromagnetic field in the circular waveguide which consists of two semi-infinite parts. One of them is empty and the other one has a cylindrical dielectric layer and a coaxial vacuum channel. Incident electromagnetic field is a symmetrical TM mode launching either from the vacuum part or from the partially dielectric part. Such mode can be excited by a particle bunch moving along the waveguide axis. The analytical investigation of reflected and transmitted fields is performed. On the basis of this study, we develop an algorithm for numerical calculation and demonstrate properties of waveguide modes excited because of presence of transversal boundary. Moreover we perform direct numerical simulation using Comsol Multiphysics. The comparison of results of our algorithm with simulations is given, and the good agreement between both methods is demonstrated. 		 
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WEPSB036 Gold Ions Beam Losses at the Nuclotron Booster booster, ion, beam-losses, electron 440
 
  • A.V. Philippov, A. Tuzikov
    JINR/VBLHEP, Dubna, Moscow region, Russia
  
  The calculation results of the gold ions beam losses along the Nuclotron Booster perimeter are given. The presented results take the ion stimulated desorption from the cold surface of the vacuum chamber and collimation of charge-exchanged gold ions into account.  
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WEPSB040 Commissioning of the 60 keV Electron Cooler for the NICA Booster electron, cathode, ion, booster 452
 
  • A.V. Bubley, M.I. Bryzgunov, A.P. Denisov, A.D. Goncharov, V.M. Panasyuk, V.V. Parkhomchuk, V.B. Reva
    BINP SB RAS, Novosibirsk, Russia
  
  The 60 keV electron cooler for the NICA booster was designed and constructed at BINP SB RAS. The article describes results of various measurements obtained during its commissioning. Also some details of design and construction of the cooler are discussed.  
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WEPSB056 Study of Oil Wells With the Use of Accelerator Tubes, Time and Energy Spectrometers of Neutrons and Gamma Rays in a Single Geophysical Complex neutron, radiation, plasma, laser 490
 
  • A.E. Shikanov, B.Y. Bogdanovich, A.V. Il'inskiy, A.A. Isaev, K.I. Kozlovskiy, A. Nesterovich, E.D. Vovchenko
    MEPhI, Moscow, Russia
  
  The report discusses the finding of the coefficient of oil saturation of the reservoir by of nuclear methods. For this purpose, the data about pulse and the activation neutron logging and spectral logging of natural gamma activity are used in a single geophysical complex. As sources of neutron radiation can been applied accelerating tube (AT) based on different ion sources, such as plasma discharge with oscillating electrons (gas AT), vacuum arc and laser-plasma (vacuum AT). For investigation of the oil reservoir, in particular with heavy oil, we discuss the prospects of using vacuum accelerating tube based on a laser-plasma source of deuterons with coaxial acceleration geometry and pulsed magnetic isolation of electrons.  
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WEPSB061 Neutron Generators of the NG-10 Series for Metrology neutron, ion, target, controls 502
 
  • D.A. Solnyshkov, A.V. Kozlov, A.N. Kuzhlev, N.P. Mikulinas, A.V. Morozov, G.G. Voronin
    NIIEFA, St. Petersburg, Russia
  
  Neutron generators NG-10 and NG-10M with a neutron yield of 1*1010 n/s and 2*1011 n/s respectively have been designed in the JSC "NIIEFA". The generators are high-voltage accelerators with target devices intended for installation and effective cooling of Ti-T/Ti-D targets of different diameters. A duoplasmotron with a beam current up to 5 mA is used in the NG-10 generator, and the NG-10M employs a microwave ion source providing the beam current up to 10 mA. The power supplies, which are under high voltage, are controlled via fiber optic communication lines. Deuterium ions produced in the ion source are accelerated up to 150 keV in a sectionalized accelerating tube, separated in mass with an electromagnetic mass-separator and focused onto a target with a doublet of electromagnetic quadrupole lenses. The generators are equipped with several lines to transport the beam to targets, which can be placed in separate rooms. In addition to a high and stable in time yield of neutrons when operating continuously, the generators provide the pulsed mode with a smooth variation of the pulse width from 2 mks up to 100 mks and pulse repetition rate from 1 Hz up to 20 kHz.  
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WEPSB064 Modifications of Electron Linear Accelerators Produced in NIIEFA for Sterilization electron, gun, klystron, focusing 505
 
  • Yu. Zuev, A.P. Klinov, A.S. Krestianinov, O.L. Maslennikov, V.V. Terentyev
    NIIEFA, St. Petersburg, Russia
  
  The paper analyses a series of electron linear accelerators equipped with one and the same accelerating structure. The structure operates in the standing-wave mode at a frequency of 2856 MHz. The accelerators differ in type and duty cycle of RF generators, electron sources, beam extraction and scanning devices and in configuration and layout of their auxiliary equipment. These modifications can provide the beam energy of 8-10 MeV and beam power up to 10-12 kW. Facilities with the accelerating structure have been used for electron beam sterilization of medical disposables and food processing over ten years.  
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WEPSB068 Radiation From Open-Ended Flanged Waveguide With Dielectric Loading simulation, radiation, electron, extraction 515
 
  • V.V. Vorobev, S.N. Galyamin, A.A. Grigoreva, A.V. Tyukhtin
    Saint Petersburg State University, Saint Petersburg, Russia
  
  Funding: The work is supported by the Grant of the President of Russian Federation (No. 6765.2015.2) and the Grants from Russian Foundation for Basic Research (No. 15-32-20985, 15-02-03913).
Terahertz radiation is considered as a promising tool for a number of applications. One possible way to emit THz waves is to pass short electron bunch through a waveguide structure loaded with dielectric. Previously we considered the extraction of radiation from the open end of the waveguide with dielectric loading in both approximate and rigorous formulation. We also developed a rigorous approach based on mode-matching technique and modified residue-calculus technique for the case when the waveguide with dielectric is co-axial with infinite waveguide with greater radius. The study presented is devoted to the case when the dielectric loaded waveguide has a flange and enclosed into another waveguide with a greater radius. The case of the flanged waveguide in the unbounded vacuum space can be described as the limiting case of the problem under consideration. We perform analytical calculation (based on mode-matching technique and modified residue-calculus technique) and direct numerical simulation. 		 
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WEPSB069 Radiation of a Bunch Flying from the Open End of a Waveguide with a Dielectric Loading radiation, simulation, electron, electromagnetic-fields 518
 
  • S.N. Galyamin, A.V. Tyukhtin, V.V. Vorobev
    Saint Petersburg State University, Saint Petersburg, Russia
  • A. Altmark, S. Baturin
    LETI, Saint-Petersburg, Russia
  
  Funding: Work is supported by the Grant of the President of Russian Federation (No. 6765.2015.2) and the Grant from Russian Foundation for Basic Research (No. 15-32-20985).
In this paper we proceed with our investigation of Terahertz emission from beam moving in waveguide structures with dielectric layer*. Recently we have considered an open-ended waveguide (with uniform dielectric filling) placed inside regular vacuum waveguide of a larger radius and excited by a single incident waveguide mode**. Here we present analytical results for the case where the structure is excited by a moving charge. We also perform simulations using CST® PS code and compare results.
* S.N. Galyamin, A.V. Tyukhtin, S.S. Baturin, S. Antipov, Opt. Express 22(8) 8902 (2014).
** S.N. Galyamin, A.V. Tyukhtin, S.S. Baturin, V.V. Vorobev, A.A. Grigoreva, in Proc. IPAC'16, pp. 1617-1619. 		 
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WEPSB075 Beam Injector for Vacuum Insulated Tandem Accelerator ion, acceleration, ion-source, high-voltage 529
 
  • A.S. Kuznetsov, K.A. Blokhina, A.A. Gmyrya, A.V. Ivanov, D.A. Kasatov, A.M. Koshkarev, A.L. Sanin
    BINP SB RAS, Novosibirsk, Russia
  • K.A. Blokhina, A.A. Gmyrya
    NSTU, Novosibirsk, Russia
  • D.A. Kasatov, A.M. Koshkarev
    NSU, Novosibirsk, Russia
  
  Funding: Applied research is carrying out with the financial support of the Russian Federation represented by the Ministry of Education and Science of Russia (unique identifier RFMEFI60414X0066).
The Vacuum Insulated Tandem Accelerator is built at the Budker Institute of Nuclear Physics. The accelerator is designed for development of the concept of accelerator-based boron neutron capture therapy of malignant tumors in the clinic.* In the accelerator the negative hydrogen ions are accelerated by the high voltage electrode potential to the half of required energy, and after conversion of the ions into protons by means of a gas stripping target the protons are accelerated again by the same potential to the full beam energy. During the facility development, the proton beam was obtained with 5 mA current and 2 MeV energy**. To ensure the beam parameters and reliability of the facility operation required for clinical applications, the new injector was designed based on the ion source with a current up to 15 mA***, providing the possibility of preliminary beam acceleration up to 120-200 keV. The paper presents the status of the injector construction and testing.
*B.F.Bayanov, et al. Nuclear Instr. and Methods in Physics Research A 413/2-3 (1998) 397-426.
**A. Ivanov, et al. Journal of Instrumentation 11 (2016) P04018.
***Yu. Belchenko, et al. AIP Conference Proceedings 1097, 214 (2009); doi: 10.1063/1.3112515
 		 
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WEPSB077 High Speed Cryogenic Monodisperse Targets for High Intensity Cyclic and Linear Accelerators target, cryogenics, controls, experiment 532
 
  • A.V. Bukharov, E.V. Vishnevskii
    MPEI, Moscow, Russia
  
  The basic possibility of creation of high speed cryogenic monodisperse targets is shown. According to calculations at input of thin liquid cryogenic jets with a velocity of bigger 100 m/s in vacuum the jets don't manage to freeze at distance to 1 mm and can be broken into monodisperse drops. Drops due to evaporation are cooled and become granules. High speed cryogenic monodisperse targets have the following advantages: direct input in vacuum (there is no need for a chamber of a triple point chamber and sluices), it is possible to use the equipment of a cluster target, it is possible to receive targets with a diameter of D < 20 mkm from various cryogenic liquids (H2, D2, N2, Ar) with dispersion less than 1%, the high velocity of monodisperse granules(> 100m/s), exact synchronization of the target hitting moment in a beam with the moment of sensors turning on  
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THPSC001 The Multipole Lens Mathematical Modeling multipole, electron, cathode, controls 535
 
  • E.M. Vinogradova
    Saint-Petersburg State University, Saint-Petersburg, Russia
  • A.V. Starikova
    Saint Petersburg State University, Saint Petersburg, Russia
  
  In the present work the mathematical model of the multipole system is presented. The multipole system is composed of arbitrary even number of the uniform electrodes. Each of the electrodes is a part of the plane. The potentials of the electrodes are the same modulus and opposite sign for neighboring electrodes. The variable separation method is used to solve the electrostatic problem. The potential distribution is represented as the eigen functions expansions. The boundary conditions and the normal derivative continuity conditions lead to the linear algebraic equations system relative to the series coefficients.  
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THPSC002 Use of Structural-Variational Method of R-functions in Mathematical Modeling of Magnetic Systems experiment, induction 538
 
  • O.I. Zaverukha, M.V. Sidorov
    NURE, Kharkov, Ukraine
  
  Magnetic systems are widespread in nature and technic. For example, they are the component of accelerator and spectrometer facilities, stabilization systems of artificial satellites etc. Nowadays the most often used methods for numerical analysis of magnetic systems are methods of finite differences, finite elements, boundary integral elements etc. The main disadvantage of these methods is the necessity to generate and adjust the computational grid for each unique area. The R-function method, proposed by Ukrainian academic of National academy of science V.L.Rvachev, can be an alternative to existing methods for magnetic systems calculation. This method allows to build so called "solution structures" - bundle of functions that exactly meets the boundary value problems. Method treats the geometry exactly as well. The use of R-function method to calculate magnetic field in spectrometric magnet SP-40 is observed. Solution structure that takes into account the geometry of the area occupied by magnetic system, meets all boundary conditions, including matched conditions on the "ferromagnetic-vacuum" edge is build for this problem. Approximation of the indefinite component of the solution structure is proposed to calculate using Galerkin method.  
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THPSC017 A Synchrotron Radiation Beamline Installed at BINP to Study the High Luminosity LHC Vacuum System photon, electron, radiation, synchrotron 572
 
  • A.A. Krasnov, V.V. Anashin, A.M. Semenov, D.B. Shwartz
    BINP SB RAS, Novosibirsk, Russia
  • V. Baglin, P. Chiggiato, B. Henrist
    CERN, Geneva, Switzerland
  • D.B. Shwartz
    NSU, Novosibirsk, Russia
  
  In the framework of the HL-LHC project, the vacuum performance of new surface material needs to be studied. In particular, a-C coating is proposed as an anti-multipactor surface in the HL-LHC Inner Triplets. Since the protons in the HL-LHC Inner Triplets will generate synchrotron radiation (SR) with ~ 10 eV critical energy and ~ 1016 ph/m/s flux, it is therefore of great importance to study the impact of such photons on a-C coating held at room and cryogenic temperature and compare the results against present LHC material. This paper describes construction and parameters of experimental set-up based on new Synchrotron Radiation beamline from booster synchrotron BEP at BINP. The experimental program releasing in collaboration between CERN and BINP for performing measurements of photon stimulated gas desorption, photon distribution and photo-electron emission provoked by synchrotron radiation are presented  
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THPSC018 Achievement of Necessary Vacuum Conditions in the NICA Accelerator Complex booster, collider, ion, cathode 575
 
  • A.V. Smirnov, A.M. Bazanov, A.V. Butenko, A.R. Galimov, H.G. Khodzhibagiyan, A. Nesterov, A.N. Svidetelev, A. Tikhomirov
    JINR, Dubna, Moscow Region, Russia
  
  NICA is a new accelerator collider complex under construction at the Joint Institute for Nuclear Research in Dubna. The facility is aimed at providing collider experiments with heavy ions up to Gold in a center of mass energy range from 4 to 11 GeV/u and an average luminosity up to 1027 cm-2 s-1. The collisions of polarized deuterons are also foreseen. The facility includes two injector chains, a new superconducting booster synchrotron, the existing superconducting synchrotron Nuclotron, and a new superconducting collider consisting of two rings, each of about 500 m in circumference. Vacuum volumes of the accelerator booster and Nuclotron and the superconducting collider are divided into volumes of superconducting elements thermal enclosure and beam chambers. The beam chambers consist regular cold periods, which are at a temperature of 4.2K to 80K, and warm irregular gaps at room temperature. Operating pressure in the thermal enclosure vacuum volumes have to maintained in the range of 10-7 to 10-4 mbar, in the beam chamber cold and warm areas - not more than 2·10-11 mbar. The requirements for materials, surface preparation conditions and the level of leakage in the vacuum volume are set out. The description of way to achievement and maintenance of the working vacuum in the NICA project are presented.  
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THPSC032 The Study of the Electrical Strength of Selected Insulators With a Different Shape of the Surface high-voltage, experiment, neutron, tandem-accelerator 615
 
  • Ya.A. Kolesnikov, D.A. Kasatov, A.M. Koshkarev, A.S. Kuznetsov, A.N. Makarov, I.M. Shchudlo, I.N. Sorokin, S.Yu. Taskaev
    BINP SB RAS, Novosibirsk, Russia
  • A.A. Gmyrya
    BINP & NSTU, Novosibirsk, Russia
  • D.A. Kasatov, A.M. Koshkarev
    NSU, Novosibirsk, Russia
  • E.O. Sokolova
    Budker INP & NSU, Novosibirsk, Russia
  
  Funding: Ministry of Science of the Russian Federation, unique identifier of applied research RFMEFI60414X0066.
In the BINP SB RAS was proposed and created a source of epithermal neutrons for BNCT. The proton beam is obtained on a tandem accelerator with vacuum insulation. Sectionalized demountable feed through insulator is an integral part of the accelerator. Voltage from the high voltage source is distributed to the electrodes via resistive divider. Because of the small amount of current (hundreds of microamperes) flowing through the divider, dark currents that occur in the accelerating gaps, can significantly affect the uniform distribution of the potential along the accelerating channel, and, consequently, on the beam transportation. Therefore there is a need to change the design of the feed through insulator which will allow to set potentials at the electrodes directly from the high voltage rectifier sections. To study the feasibility of such changes has been designed and built an experimental stand, in which a single insulator with double height subjected to the same conditions as in accelerator. On the experimental stand was studied electrical strength of ceramic and polycarbonate insulators with a different shape of the surface. The paper presents the results of experimental studies of insulators. Their application will get rid of the voltage divider inside the feed through insulator and realize the scheme which allows to set potential on the electrode gaps directly from the rectifier section. This will increase the operating voltage of the accelerator and its reliability. 		 
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THPSC033 Obtainment of 5 mA 2 MeV Proton Beam in the Vacuum Insulation Tandem Accelerator ion, proton, electron, tandem-accelerator 618
 
  • I.M. Shchudlo, D.A. Kasatov, A.M. Koshkarev, A.N. Makarov, Y.M. Ostreinov, I.N. Sorokin, S.Yu. Taskaev
    BINP SB RAS, Novosibirsk, Russia
  
  Funding: The study was supported by the grants from the Russian Science Foundation (Project No.14-32-00006), Budker Nuclear Institute and Novosibirsk State University
In BINP the neutron source for BNCT based on proton accelerator was designed and built. It is necessary for the therapy to ensure a stable proton beam current of not less than 3 mA with energy 2 MeV. During the injection of negative hydrogen ion beam into the accelerator the unwanted charged particles are produced, affecting the stability of beam parameters. The article describes meth-ods of suppression of undesirable charged particles and the results of experiments. 		 
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THPSC051 The Magnetic Energy Analyzer for Electron Beam Of LUE-200 Linac of IREN Facility electron, detector, target, linac 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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THPSC069 Measurement of the Ion Beam Profile with the D-Pace Wire Scanner ion, neutron, experiment, focusing 695
 
  • E.O. Sokolova
    Budker INP & NSU, Novosibirsk, Russia
  • D.A. Kasatov, Ya.A. Kolesnikov, A.M. Koshkarev, A.S. Kuznetsov, A.N. Makarov, I.M. Shchudlo, I.N. Sorokin, S.Yu. Taskaev
    BINP SB RAS, Novosibirsk, Russia
  
  Funding: The study was supported by grants from the Russian Science Foundation (Project no. 14-32-00006) and the Budker Institute of Nuclear Physics and the Novosibirsk State University.
In The Budker Institute of Nuclear Physics the accelerator-based source of epithermal neutrons was invented and now operates to be used in the boron neutron capture therapy. For several reasons the real beam flow in the facility differs from the calculated one. To take into account this distinction it is necessary to provide continuous monitoring of the beam parameters. In order to optimize the facility operation the beam should be followed not only during the formation but also while an acceleration takes place and the proton beam is thrown on the lithium target as the proton current and energy influence on the neutron output. In this way it seems to be a significant issue to measure the current, profile and also the position of the ion beam in a low-energy part of the accelerator. This work represents the results of experiments with the D-Pace WS-30 Wire Scanner Probe, which was installed in the low-energy part of the accelerator. The experiments were carried out under various conditions to vary the position and focusing control via the system of magnetic correcting elements. To correctly interpret experimental data it was necessary to take into account physical phenomena which occur during an experiment. In this way the effects which take place when the probe interacts with the beam were thoroughly considered. The obtained results allowed to restore the ion beam profile, define its size and position. 		 
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