RuPAC2016 - List of Keywords (high-voltage)

Paper	Title	Other Keywords	Page
WECDMH01	Commissioning of High Efficiency Standing Wave Linac for Industrial Applications	klystron, electron, gun, power-supply	99
	A.N. Ermakov, A.S. Alimov, V.V. Khankin, L. Ovchinnikova, N.I. Pakhomov, N.V. Shvedunov, V.I. Shvedunov SINP MSU, Moscow, Russia A.S. Alimov, A.N. Ermakov, V.V. Khankin, V.V. Klementiev, L. Ovchinnikova, N.I. Pakhomov, Yu.N. Pavshenko, N.V. Shvedunov, V.I. Shvedunov, A.S. Simonov LEA MSU, Moscow, Russia
	We present the results of the commissioning of the pulsed linear electron accelerator with beam energy of 10 MeV, developed with the participation of scientists and engineers of the SINP MSU, LEA MSU Ltd. and JSC "RPE "Toriy". The source of RF power for accelerator is a multibeam klystron KIU-147A operating at 2856 MHz with pulse output power 6 MW and an average power of 25 kW. As a result of commissioning we received at the output of accelerator scanning system an electron beam with an energy of 10 MeV and an average power of more than 15 kW. Capture ratio and electronic efficiency of 1.24 m long accelerating structure are greater than 65%.
	Slides WECDMH01 [7.123 MB]
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THCAMH02	Electron Accelerators Series ILU and Prospects of Their Application in the Food Industry	electron, radiation, acceleration, operation	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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THXSH02	Three Transverse Deflecting Systems for Electron Beam Diagnostics in the European Free-Electron Laser XFEL	klystron, electron, controls, diagnostics	196
	A.A. Zavadtsev RAS/INR, Moscow, Russia
	Funding: European XFEL GmbH, Ministry of Education and Science of Russia In frames of Russian in-kind contribution to Europe-an XFEL, INR in cooperation with DESY is responsible for Transverse Deflecting Systems (TDS) for special beam diagnostic in the XFEL linac. Three TDS have been developed: TDS INJ in the Injector, TDS BC1 in the Accelerator tunnel after Bunch Compressor 1 and TDS BC1 after Bunch Compressor 2. Each system in-cludes S-band disk-loaded deflecting structure (DLS), waveguide system, klystron, pulse transformer, modu-lator and control system. TDS INJ has been built, as-sembled in the Injector building and tested. It is used to monitor the bunch length, longitudinal phase space and slice emittance now. Exceptionally small, exceed-ing expectations, slice emittance of electron bunch was measured using TDS INJ during the XFEL Injector commissioning. Three structures for TDS BC1 and TDS BC2 as well as the waveguide systems have been built, tested and TDS BC2 part installed in the XFEL tunnel. On behalf of the joint XFEL TDS team
	Slides THXSH02 [16.400 MB]
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TUPSA031	The Cascade Interference Switch Comprising a Transmission Resonator	plasma, cavity, simulation, distributed	282
	S.A. Gorev, S.N. Artemenko, V.S. Igumnov TPU, Tomsk, Russia
	The new concept of microwave interference switches is reported. Interference switch is based on series of H-plane T-junctions (cascade switch) in the view of decreasing switched power at Off state and comprises irises in both its own input and output arms. At On state the irises act as a transmission resonator localizing the nodes of the standing wave at the junctions. Such distribution is expected to decrease the plasma losses. It was shown with a simulation that the cascade switch with additional irises increases the efficiency of the active microwave compressors. The simulation was made with CST studio and COMSOL.
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TUPSA038	The RF Power System for RFQ-Injector of Linac-20	rfq, ion, DTL, acceleration	297
	V.G. Kuzmichev, A.V. Kozlov, T. Kulevoy, S.M. Polozov, D.N. Selesnev, Yu. Stasevich ITEP, Moscow, Russia A.V. Butenko JINR, Dubna, Moscow Region, Russia T. Kulevoy, S.M. Polozov MEPhI, Moscow, Russia
	In the frame of the Nuclotron-M project the electrostatic injector of LU-20 is replaced by a RFQ accelerator, which has been developed in ITEP. The construction of 400 kW, 145 MHz RF system for RFQ-injector are described. Pa-rameters and test results of the RF power system operated on the resistive load and on RFQ during ion beam accele-ration are presented
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WEPSB042	Commissioning of Electron Cooling Devices at HIRFL-CSR	electron, ion, experiment, operation	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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WEPSB075	Beam Injector for Vacuum Insulated Tandem Accelerator	ion, acceleration, ion-source, vacuum	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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THPSC003	The Design of Permenant Magnet Spread System for 0.5 MeV Irradiation Accelerator	electron, permanent-magnet, dipole, radiation	541
	J. Huang, Q.S. Chen, K. Fan, M. Fan, W. Qi, Y.Q. Xiong, J. Yang, L.G. Zhang HUST, Wuhan, People's Republic of China T. Yu, C. Zuo Huazhong University of Science and Technology, State Key Laboratory of Advanced Electromagnetic Engineering and Technology,, Hubei, People's Republic of China
	Funding: Supported by Natural Science Foundation (11505068) The traditional electron beam scanning magnet has many disadvantages, for example, the regulatory of excitation current is very complex and the irradiation uniformity as well as the irradiation area is very difficult to improve and expand. Thus the author of the paper proposes an innovative technology of a permanent magnet spread system for 10 MeV irradiation accelerator which uses a special configuration of the magnetic field to spread electron beam bunch directly and would remarkably improve the spread uniformity, simplify the accelerator and would be helpful to protect the titanium window and expand the irradiation area. Also, the technology could as well be used on the electron beam irradiation of those irregular structured objects of large size.
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THPSC022	High-Voltage Power Supply for GOG-1001	laser, controls, monitoring, power-supply	587
	V. Dokutovich, A.D. Chernyakin, D.V. Senkov BINP SB RAS, Novosibirsk, Russia
	At this time BINP are working on material research for the ITER project. The spatial inhomogeneity of deformation is the scope of this study. An optical pattern generator GOG-1001 that increases the energy of monochromatic light source is used in such experiments. GOG-1001 is powered by a high-voltage quasi-momentum PS that feeds energy stored in a capacitor bank to the generator's pump tube. A pulsed voltage source driven by FPGA controller module has been developed. The module controls correct bank charge, monitors tube's current and voltage as well as calculates the energy supplied to the bank and activates the generator. A hardware bank overcharge protection prevents the pump tube from failure. The developed source has two control modes; remote - workstation and manual - front panel. The source control logic is based on FPGA while communication and date computing is processed by a digital processor and a graphic display. High-Voltage Power Supply, laser power,
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THPSC025	Generator of High-Voltage Pulse for High-Current Accelerator of Deuteron With Laser Starts	laser, plasma, cathode, electron	594
	E.D. Vovchenko, A.A. Isaev, K.I. Kozlovskiy, A.E. Shikanov MEPhI, Moscow, Russia
	The report deals with the source of pulsed high voltage, and simultaneously, source of the pulsed current for the magnetic insulation of electrons near the cathode that was developed for a high-current accelerator of deuterons with laser-plasma anode. The accelerating voltage up to 400 kV and ion current about 1 kA have been achieved. The current in the spiral inductor has reached 4 kA and it excludes breakdown between the cathode and anode for 0.5 mks. For synchronization of physical processes in accelerator of deuterons with pulsed power, the laser control is applied.
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THPSC027	Solid-State Modulators for Particle Accelerators	klystron, electron, linac, controls	600
	A.A. Zavadtsev, D. Churanov, D.A. Zavadtsev, D.A. Zybin Nano, Moscow, Russia
	A series of the wide parameter range solid-state high-voltage modulators has been developed and built as a power supplies for the magnetrons and the klystrons in the particle accelerators. The series includes 60 kV/100 A/6 μs modulator with pulse transformer for 3 MW magnetron, 60 kV/300 A/6 μs direct switch modulator for 6 MW multi-beam klystron, 110 kV/80A/6 μs direct switch modulator for 3 MW klystron, 130 kV/100 A/6 μs modulator with pulse transformer for 5 MW klystron, 250 kV/250 A/6 μs modulator with pulse transformer for 20 MW klystron. The last modulator is under construction. All other modulators have been supplied to customers in Russia as well as in Europe.
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THPSC029	300 kV High-Voltage Source With Up to 15 kW Output Power	controls, operation, 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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THPSC030	High-Precision Ramped High-Voltage Source With Up to 50 kV Output Voltage	feedback, booster, interface, electron	609
	D.V. Senkov, A.M. Batrakov, I.A. Gusev, A.Yu. Protopopov, A.A. Zharikov BINP SB RAS, Novosibirsk, Russia
	This report describes the precision high-voltage ramped high-voltage power system. The output voltage up to 50 kV with 10 ppm precision. The power system consists of the 3 kW high-voltage source based on multiplier, presision high-voltage divider with digital interface and high-voltage discharge switch to provide low ramp-down time for output voltage. The power system is planed to use in the NIKA booster electron cooler project. The description and test results are presented.
	Poster THPSC030 [1.985 MB]
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THPSC032	The Study of the Electrical Strength of Selected Insulators With a Different Shape of the Surface	vacuum, 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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THPSC037	Loss Analysis of Insulated Core Transformer High Voltage Power Supply	power-supply, electron, radiation, electronics	620
	Y.F. Zhang, J. Huang, M.K. Li, H. Liang, W. Qi, Y.Q. Xiong, J. Yang, L.G. Zhang, C. Zuo HUST, Wuhan, People's Republic of China T. Yu Huazhong University of Science and Technology, State Key Laboratory of Advanced Electromagnetic Engineering and Technology,, Hubei, People's Republic of China
	Insulated core transformer (ICT) electron accelerator is an ideal prototype in low energy radiation processing industry, and ICT high voltage power supply is the essential apparatus. Conventional ICT high voltage power supply uses laminated silicon steel sheets as magnetic cores and works at 50 Hz. In a novel design of the ICT high voltage power supply, the magnetic cores made of ferrite material are adopted to increase the frequency and improve the performance. Focusing on the new scheme, the loss calculation of the high voltage power supply was carried out. The loss of ferrite magnetic cores and the windings was analysed and simulated.
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THPSC038	A Novel Design of Insulated Core Transformer High Voltage Power Supply	power-supply, controls, electron, software	623
	M.K. Li, K. Fan, M. Fan, J. Huang, H. Liang, W. Qi, Y.Q. Xiong, J. Yang, L. Yang, L.G. Zhang, Y.F. Zhang, C. Zuo HUST, Wuhan, People's Republic of China T. Yu Huazhong University of Science and Technology, State Key Laboratory of Advanced Electromagnetic Engineering and Technology,, Hubei, People's Republic of China
	Insulated core transformer (ICT) high voltage power supply is an ideal model for industrial radiation accelerator at energy below 1MeV. Compared to the traditional scheme, a novel ICT high voltage power supply was put forward. Conventional silicon steel sheets were replaced with manganese zinc ferrites, raising working frequency from 50Hz to thousand hertz. Magnetic structure was changed from three-phase structure to four-phase structure. Accordingly, excitation voltage was changed from three-phase sinusoidal wave to square wave. Polyimide was chosen as insulation material instead of teflon or mica. A prototype of 400kV/50mA was designed, simulated and verified with the aid of finite element analysis software. To optimize the voltage distribution, corresponding flux compensation methods were raised to solve the problem of flux leakages.
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Paper

Title

Other Keywords

Page

WECDMH01

Commissioning of High Efficiency Standing Wave Linac for Industrial Applications

klystron, electron, gun, power-supply

99

A.N. Ermakov, A.S. Alimov, V.V. Khankin, L. Ovchinnikova, N.I. Pakhomov, N.V. Shvedunov, V.I. Shvedunov
SINP MSU, Moscow, Russia
A.S. Alimov, A.N. Ermakov, V.V. Khankin, V.V. Klementiev, L. Ovchinnikova, N.I. Pakhomov, Yu.N. Pavshenko, N.V. Shvedunov, V.I. Shvedunov, A.S. Simonov
LEA MSU, Moscow, Russia

We present the results of the commissioning of the pulsed linear electron accelerator with beam energy of 10 MeV, developed with the participation of scientists and engineers of the SINP MSU, LEA MSU Ltd. and JSC "RPE "Toriy". The source of RF power for accelerator is a multibeam klystron KIU-147A operating at 2856 MHz with pulse output power 6 MW and an average power of 25 kW. As a result of commissioning we received at the output of accelerator scanning system an electron beam with an energy of 10 MeV and an average power of more than 15 kW. Capture ratio and electronic efficiency of 1.24 m long accelerating structure are greater than 65%.

Slides WECDMH01 [7.123 MB]

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THCAMH02

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

electron, radiation, acceleration, operation

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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THXSH02

Three Transverse Deflecting Systems for Electron Beam Diagnostics in the European Free-Electron Laser XFEL

klystron, electron, controls, diagnostics

196

A.A. Zavadtsev
RAS/INR, Moscow, Russia

Funding: European XFEL GmbH, Ministry of Education and Science of Russia
In frames of Russian in-kind contribution to Europe-an XFEL, INR in cooperation with DESY is responsible for Transverse Deflecting Systems (TDS) for special beam diagnostic in the XFEL linac. Three TDS have been developed: TDS INJ in the Injector, TDS BC1 in the Accelerator tunnel after Bunch Compressor 1 and TDS BC1 after Bunch Compressor 2. Each system in-cludes S-band disk-loaded deflecting structure (DLS), waveguide system, klystron, pulse transformer, modu-lator and control system. TDS INJ has been built, as-sembled in the Injector building and tested. It is used to monitor the bunch length, longitudinal phase space and slice emittance now. Exceptionally small, exceed-ing expectations, slice emittance of electron bunch was measured using TDS INJ during the XFEL Injector commissioning. Three structures for TDS BC1 and TDS BC2 as well as the waveguide systems have been built, tested and TDS BC2 part installed in the XFEL tunnel.
On behalf of the joint XFEL TDS team

Slides THXSH02 [16.400 MB]

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TUPSA031

The Cascade Interference Switch Comprising a Transmission Resonator

plasma, cavity, simulation, distributed

282

S.A. Gorev, S.N. Artemenko, V.S. Igumnov
TPU, Tomsk, Russia

The new concept of microwave interference switches is reported. Interference switch is based on series of H-plane T-junctions (cascade switch) in the view of decreasing switched power at Off state and comprises irises in both its own input and output arms. At On state the irises act as a transmission resonator localizing the nodes of the standing wave at the junctions. Such distribution is expected to decrease the plasma losses. It was shown with a simulation that the cascade switch with additional irises increases the efficiency of the active microwave compressors. The simulation was made with CST studio and COMSOL.

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TUPSA038

The RF Power System for RFQ-Injector of Linac-20

rfq, ion, DTL, acceleration

297

V.G. Kuzmichev, A.V. Kozlov, T. Kulevoy, S.M. Polozov, D.N. Selesnev, Yu. Stasevich
ITEP, Moscow, Russia
A.V. Butenko
JINR, Dubna, Moscow Region, Russia
T. Kulevoy, S.M. Polozov
MEPhI, Moscow, Russia

In the frame of the Nuclotron-M project the electrostatic injector of LU-20 is replaced by a RFQ accelerator, which has been developed in ITEP. The construction of 400 kW, 145 MHz RF system for RFQ-injector are described. Pa-rameters and test results of the RF power system operated on the resistive load and on RFQ during ion beam accele-ration are presented

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WEPSB042

Commissioning of Electron Cooling Devices at HIRFL-CSR

electron, ion, experiment, operation

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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WEPSB075

Beam Injector for Vacuum Insulated Tandem Accelerator

ion, acceleration, ion-source, vacuum

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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THPSC003

The Design of Permenant Magnet Spread System for 0.5 MeV Irradiation Accelerator

electron, permanent-magnet, dipole, radiation

541

J. Huang, Q.S. Chen, K. Fan, M. Fan, W. Qi, Y.Q. Xiong, J. Yang, L.G. Zhang
HUST, Wuhan, People's Republic of China
T. Yu, C. Zuo
Huazhong University of Science and Technology, State Key Laboratory of Advanced Electromagnetic Engineering and Technology,, Hubei, People's Republic of China

Funding: Supported by Natural Science Foundation (11505068)
The traditional electron beam scanning magnet has many disadvantages, for example, the regulatory of excitation current is very complex and the irradiation uniformity as well as the irradiation area is very difficult to improve and expand. Thus the author of the paper proposes an innovative technology of a permanent magnet spread system for 10 MeV irradiation accelerator which uses a special configuration of the magnetic field to spread electron beam bunch directly and would remarkably improve the spread uniformity, simplify the accelerator and would be helpful to protect the titanium window and expand the irradiation area. Also, the technology could as well be used on the electron beam irradiation of those irregular structured objects of large size.

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THPSC022

High-Voltage Power Supply for GOG-1001

laser, controls, monitoring, power-supply

587

V. Dokutovich, A.D. Chernyakin, D.V. Senkov
BINP SB RAS, Novosibirsk, Russia

At this time BINP are working on material research for the ITER project. The spatial inhomogeneity of deformation is the scope of this study. An optical pattern generator GOG-1001 that increases the energy of monochromatic light source is used in such experiments. GOG-1001 is powered by a high-voltage quasi-momentum PS that feeds energy stored in a capacitor bank to the generator's pump tube. A pulsed voltage source driven by FPGA controller module has been developed. The module controls correct bank charge, monitors tube's current and voltage as well as calculates the energy supplied to the bank and activates the generator. A hardware bank overcharge protection prevents the pump tube from failure. The developed source has two control modes; remote - workstation and manual - front panel. The source control logic is based on FPGA while communication and date computing is processed by a digital processor and a graphic display.
High-Voltage Power Supply, laser power,

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THPSC025

Generator of High-Voltage Pulse for High-Current Accelerator of Deuteron With Laser Starts

laser, plasma, cathode, electron

594

E.D. Vovchenko, A.A. Isaev, K.I. Kozlovskiy, A.E. Shikanov
MEPhI, Moscow, Russia

The report deals with the source of pulsed high voltage, and simultaneously, source of the pulsed current for the magnetic insulation of electrons near the cathode that was developed for a high-current accelerator of deuterons with laser-plasma anode. The accelerating voltage up to 400 kV and ion current about 1 kA have been achieved. The current in the spiral inductor has reached 4 kA and it excludes breakdown between the cathode and anode for 0.5 mks. For synchronization of physical processes in accelerator of deuterons with pulsed power, the laser control is applied.

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THPSC027

Solid-State Modulators for Particle Accelerators

klystron, electron, linac, controls

600

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

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

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THPSC029

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

controls, operation, 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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THPSC030

High-Precision Ramped High-Voltage Source With Up to 50 kV Output Voltage

feedback, booster, interface, electron

609

D.V. Senkov, A.M. Batrakov, I.A. Gusev, A.Yu. Protopopov, A.A. Zharikov
BINP SB RAS, Novosibirsk, Russia

This report describes the precision high-voltage ramped high-voltage power system. The output voltage up to 50 kV with 10 ppm precision. The power system consists of the 3 kW high-voltage source based on multiplier, presision high-voltage divider with digital interface and high-voltage discharge switch to provide low ramp-down time for output voltage. The power system is planed to use in the NIKA booster electron cooler project. The description and test results are presented.

Poster THPSC030 [1.985 MB]

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THPSC032

The Study of the Electrical Strength of Selected Insulators With a Different Shape of the Surface

vacuum, 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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THPSC037

Loss Analysis of Insulated Core Transformer High Voltage Power Supply

power-supply, electron, radiation, electronics

620

Y.F. Zhang, J. Huang, M.K. Li, H. Liang, W. Qi, Y.Q. Xiong, J. Yang, L.G. Zhang, C. Zuo
HUST, Wuhan, People's Republic of China
T. Yu
Huazhong University of Science and Technology, State Key Laboratory of Advanced Electromagnetic Engineering and Technology,, Hubei, People's Republic of China

Insulated core transformer (ICT) electron accelerator is an ideal prototype in low energy radiation processing industry, and ICT high voltage power supply is the essential apparatus. Conventional ICT high voltage power supply uses laminated silicon steel sheets as magnetic cores and works at 50 Hz. In a novel design of the ICT high voltage power supply, the magnetic cores made of ferrite material are adopted to increase the frequency and improve the performance. Focusing on the new scheme, the loss calculation of the high voltage power supply was carried out. The loss of ferrite magnetic cores and the windings was analysed and simulated.

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THPSC038

A Novel Design of Insulated Core Transformer High Voltage Power Supply

power-supply, controls, electron, software

623

M.K. Li, K. Fan, M. Fan, J. Huang, H. Liang, W. Qi, Y.Q. Xiong, J. Yang, L. Yang, L.G. Zhang, Y.F. Zhang, C. Zuo
HUST, Wuhan, People's Republic of China
T. Yu
Huazhong University of Science and Technology, State Key Laboratory of Advanced Electromagnetic Engineering and Technology,, Hubei, People's Republic of China

Insulated core transformer (ICT) high voltage power supply is an ideal model for industrial radiation accelerator at energy below 1MeV. Compared to the traditional scheme, a novel ICT high voltage power supply was put forward. Conventional silicon steel sheets were replaced with manganese zinc ferrites, raising working frequency from 50Hz to thousand hertz. Magnetic structure was changed from three-phase structure to four-phase structure. Accordingly, excitation voltage was changed from three-phase sinusoidal wave to square wave. Polyimide was chosen as insulation material instead of teflon or mica. A prototype of 400kV/50mA was designed, simulated and verified with the aid of finite element analysis software. To optimize the voltage distribution, corresponding flux compensation methods were raised to solve the problem of flux leakages.

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