RuPAC2016 - List of Keywords (gun)

Paper	Title	Other Keywords	Page
TUCAMH02	CW 100 mA Electron RF Gun for Novosibirsk ERL FEL	cathode, cavity, radiation, electron	24
	V. Volkov, V.S. Arbuzov, E. Kenzhebulatov, E.I. Kolobanov, A.A. Kondakov, E.V. Kozyrev, S.A. Krutikhin, I.V. Kuptsov, G.Y. Kurkin, S.V. Motygin, A.A. Murasev, V.K. Ovchar, V.M. Petrov, A.M. Pilan, A.V. Repkov, M.A. Scheglov, I.K. Sedlyarov, S.S. Serednyakov, O.A. Shevchenko, S.V. Tararyshkin, A.G. Tribendis, N.A. Vinokurov BINP SB RAS, Novosibirsk, Russia N.A. Vinokurov NSU, Novosibirsk, Russia
	Funding: Grant 14-50-00080 of the Russian Science Foundation Continuous wave (CW) 100 mA electron RF gun for injecting the high-quality 300-400 keV electron beam in Novosibirsk microtron recuperator (ERL) and driving Free Electron Laser (FEL) was developed, built, and commissioned at BINP SB RAS. The RF gun consists of normal conducting 90 MHz RF cavity with a gridded thermionic cathode unit. Bench tests of rf gun is confirmed good results in strict accordance with the calculations. The gun was tested up to the design specifications at a test bench that includes a diagnostics beam line. The rf gun stand testing showed reliable work, unpretentious for vacuum conditions and stable in long-term operation. The design features of different components of the gun are presented. Preparation and commissioning experience is discussed. The beam test results are summarized.
	Slides TUCAMH02 [2.764 MB]
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WECDMH01	Commissioning of High Efficiency Standing Wave Linac for Industrial Applications	klystron, electron, high-voltage, 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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TUPSA007	New Experimental Results on RF Accelerator with Parallel-Coupled Structure and RF Controlled Gun	injection, electron, focusing, cavity	222
	Y.D. Chernousov ICKC, Novosibirsk, Russia I.M. Ikryanov, I.V. Shebolaev ICKC SB RAS, Novosibirsk, Russia
	New data on the development and experimental investigation of the RF accelerator based on the 9-cavities parallel-coupled accelerating structure that is equipped with a high-frequency grid-controlled electron gun are presented. Accelerating structure, injection system and focusing system are improved. Previously observed second emission resonant discharge - multipactor is suppressed by increasing the field amplitude in the structure first cavity and using the protector. The parameters of the accelerated beam close to the design ones, i.e. electron energy up to 8 MeV, capture to the acceleration mode up to 100%, were received. Capture is provided by the RF electron focusing of the microwave field structure with usage of the magnetic focusing system based on permanent magnets and RF grid control in the electron gun.
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TUPSA010	Electron Linear Accelerator with the Variable Energy from 6 to 11 MeV	electron, linac, klystron, focusing	231
	A.V. Bulanov, E.A. Savin, N.P. Sobenin MEPhI, Moscow, Russia A.V. Gryzlov TORIY, Moscow, Russia
	The standing wave accelerator with the variable energy from 6 to 11 MeV has been designed. Electron energy is controlled by the injected current. The buncher has been designed to provide capture above 70% for the all injected currents range. The possibility of using a permanent radially magnetized toroidal magnet for the beam focusing was studied.
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TUPSA020	Installation for the Research of Z-Pinch Plasma Initiated by the Electron Beam	electron, plasma, focusing, luminosity	258
	A.A. Drozdovsky, A.V. Bogdanov, S.A. Drozdovsky, R. Gavrilin, A.V. Kantsyrev, V.A. Panyushkin, I. Roudskoy, S.M. Savin, V.V. Yanenko ITEP, Moscow, Russia P.V. Sasorov Keldysh Institute of Applied Mathematics, Moscow, Russia V.V. Yanenko MEPhI, Moscow, Russia
	For researches on plasma physics has been designed and constructed the electronic gun with the cold cathode on energy to 300 keV. The gun have the parameters: time width of pulses -100 ns, current amplitude - 100 A. The adiabatic plasma lens is developed for transportation and compression of the received electron beam. Results of researches are presented.
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TUPSA025	First Results of Beam Dynamics Simulation in electron injector linac for FCC-ee	linac, simulation, beam-loading, coupling	264
	S.M. Polozov, T.V. Bondarenko MEPhI, Moscow, Russia
	New high-energy frontier project FCC is now under development at CERN. It is planed that all three modes as ee, hh and eh will be available for FCC. New injection system for FCC-ee is planned to consist of new ~ 2 GeV electron linac and electron-positron converter. Two possible layouts for further beam acceleration are discussed. The high-energy 14 GeV linac is the first layout and the booster synchrotron is the second one. Pre-injector linac design will have two regimes: ~250 pC bunches for injection and ~6 nC bunches for e⁻/e⁺ conversion. In the second case we will have extreme parameters: bunch charge up to 6 nC in 10 ps, up to 10 bunches per pulse and the pulse repetition rate up to 100 Hz. Such beam parameters lead to significant design difficulties caused by very high influence of Coulomb field in the near-cathode region and high peak beam loading. First results of beam dynamics simulation in FCC-ee injection linac and near-cathode dynamics problems are discussed in the report.
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TUPSA068	Simulation of S-Band RF Gun with RF Beam Control	cavity, cathode, controls, electron	345
	A.M. Barnyakov, A.E. Levichev, D.A. Nikiforov BINP SB RAS, Novosibirsk, Russia M.V. Maltseva NSU, Novosibirsk, Russia
	The design and operation of electron RF gun with RF beam control are described. Results of numerical simulation of electromagnetic fields and beam dynamics are presented. RF gun consists of two resonators operating at E010 mode with 180 degrees phase shift at frequency of 2856 MHz. RF control is carried out via coaxial resonator with grid-cathode capacity. Accordint to result of the simulation, RF gun with RF control allows producing electron bunches with duration of 50 ps, energy of about 3 MeV and the energy spread of about 5%.
	Poster TUPSA068 [0.996 MB]
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TUPSA069	Optimization of an RF Probe Vicinity for RF Gun Cavities	cavity, HOM, simulation, quadrupole	348
	V.V. Paramonov RAS/INR, Moscow, Russia
	To provide electron bunches with exceptionally high brightness, RF gun cavity should operate with the extreme electric and magnetic fields. The RF probe is required for the mostly reliable and precise measurements of the RF field phase and amplitude directly from the cavity. The implementation of an RF probe in the cavity design generates a set of coupled problems, which is analyzed and compared for different operating frequencies and different RF pulse length. Both general dependencies and particularities are considered. Some recommendations for practical choice of the RF probe are presented.
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WEPSB057	Beam Dynamics in New 10 Mev High-Power Electron Linac for Industrial Application	electron, simulation, linac, bunching	493
	S.M. Polozov, V.I. Rashchikov MEPhI, Moscow, Russia M.I. Demsky CORAD Ltd., St. Petersburg, Russia
	Beam dynamics simulation in electron gun, bunching and accelerating cells of new 10 Mev high-power electron linac was fulfieled with the help of developed at MEPhI SUMA * and BEAMDULAC-BL ** codes. Three-electrode electron gun was used to obtain up to 400-450 mA of pulse beam current which is necessary to produce 300 mA of the accelerated beam. Precise gun simulation was conducted to satisfy all necessary output beams characteristics, such as profile, energy spectrum, phase space size etc. Some additional calculation was conducted to provide wide range of gun output beam parameters which will be used for subsequent accelerator modification. The conventional biperiodical accelerating structure based on disk loaded waveguide was used in linac. Beam dynamics optimization was pointed to obtain effective beam bunching for all energy range and to achieve narrow energy spectrum. Simulation results shows that linac provides effective beam bunching and acceleration for wide bands of beam currents and energies. * V.I. Rashchikov, PAST, Series: Nuclear Physics Investigations, 10 (18), p.50, 1990 ** T.V. Bondarenko et al. PAST, Series: Nuclear Physics Investigations, 6 (88), p. 114, 2013
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WEPSB064	Modifications of Electron Linear Accelerators Produced in NIIEFA for Sterilization	electron, klystron, focusing, vacuum	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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THPSC067	Coaxial Quarter Wavelength Impedance Converter for Coupling Control of Triode Cavity	impedance, cavity, coupling, electron	689
	K. Torgasin, T. Kii, K. Masuda, K. Morita, K. Nagasaki, H. Ohgaki, S. Suphakul, H. Zen Kyoto University, Kyoto, Japan
	A quarter wavelength coaxial cavity has been developed for triode-type thermionic RF gun. The triode-type RF gun is a modification of present 4.5 cell thermionic RF gun of KU-FEL (Kyoto University Free Electron Laser) facility with aim to mitigate the back'bombardment effect. Thereby a coaxial quarter wavelength cavity with cathode material shall be added to the main 4.5 cell accelerating body. The coaxial cavity has the function of pre-buncher to control the injection phase and power of electron bunches into the main accelerating body. Transient tests have demonstrated the quarter wavelength cavity to be undercoupled. However, for operation at high beam loading conditions overcoupled conditions are required. In order to control the coupling we have developed an external air side coaxial quarter wavelength impedance converter. The design of the impedance converter enables operation at high RF power (<20 kV) without changing the cavity geometry. In this work we present our design and performance of quarter wavelength impedance converter as applied to quarter wavelength triode cavity. K. Torgasin et al., Cold Test of the Coaxial Cavity for Thermionic Triode Type RF Gun, in Proc. IPAC, 2013, pp.324-326.
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Paper

Title

Other Keywords

Page

TUCAMH02

CW 100 mA Electron RF Gun for Novosibirsk ERL FEL

cathode, cavity, radiation, electron

24

V. Volkov, V.S. Arbuzov, E. Kenzhebulatov, E.I. Kolobanov, A.A. Kondakov, E.V. Kozyrev, S.A. Krutikhin, I.V. Kuptsov, G.Y. Kurkin, S.V. Motygin, A.A. Murasev, V.K. Ovchar, V.M. Petrov, A.M. Pilan, A.V. Repkov, M.A. Scheglov, I.K. Sedlyarov, S.S. Serednyakov, O.A. Shevchenko, S.V. Tararyshkin, A.G. Tribendis, N.A. Vinokurov
BINP SB RAS, Novosibirsk, Russia
N.A. Vinokurov
NSU, Novosibirsk, Russia

Funding: Grant 14-50-00080 of the Russian Science Foundation
Continuous wave (CW) 100 mA electron RF gun for injecting the high-quality 300-400 keV electron beam in Novosibirsk microtron recuperator (ERL) and driving Free Electron Laser (FEL) was developed, built, and commissioned at BINP SB RAS. The RF gun consists of normal conducting 90 MHz RF cavity with a gridded thermionic cathode unit. Bench tests of rf gun is confirmed good results in strict accordance with the calculations. The gun was tested up to the design specifications at a test bench that includes a diagnostics beam line. The rf gun stand testing showed reliable work, unpretentious for vacuum conditions and stable in long-term operation. The design features of different components of the gun are presented. Preparation and commissioning experience is discussed. The beam test results are summarized.

Slides TUCAMH02 [2.764 MB]

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WECDMH01

Commissioning of High Efficiency Standing Wave Linac for Industrial Applications

klystron, electron, high-voltage, 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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TUPSA007

New Experimental Results on RF Accelerator with Parallel-Coupled Structure and RF Controlled Gun

injection, electron, focusing, cavity

222

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

New data on the development and experimental investigation of the RF accelerator based on the 9-cavities parallel-coupled accelerating structure that is equipped with a high-frequency grid-controlled electron gun are presented. Accelerating structure, injection system and focusing system are improved. Previously observed second emission resonant discharge - multipactor is suppressed by increasing the field amplitude in the structure first cavity and using the protector. The parameters of the accelerated beam close to the design ones, i.e. electron energy up to 8 MeV, capture to the acceleration mode up to 100%, were received. Capture is provided by the RF electron focusing of the microwave field structure with usage of the magnetic focusing system based on permanent magnets and RF grid control in the electron gun.

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TUPSA010

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

electron, linac, klystron, focusing

231

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

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

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TUPSA020

Installation for the Research of Z-Pinch Plasma Initiated by the Electron Beam

electron, plasma, focusing, luminosity

258

A.A. Drozdovsky, A.V. Bogdanov, S.A. Drozdovsky, R. Gavrilin, A.V. Kantsyrev, V.A. Panyushkin, I. Roudskoy, S.M. Savin, V.V. Yanenko
ITEP, Moscow, Russia
P.V. Sasorov
Keldysh Institute of Applied Mathematics, Moscow, Russia
V.V. Yanenko
MEPhI, Moscow, Russia

For researches on plasma physics has been designed and constructed the electronic gun with the cold cathode on energy to 300 keV. The gun have the parameters: time width of pulses -100 ns, current amplitude - 100 A. The adiabatic plasma lens is developed for transportation and compression of the received electron beam. Results of researches are presented.

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TUPSA025

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

linac, simulation, beam-loading, coupling

264

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

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

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TUPSA068

Simulation of S-Band RF Gun with RF Beam Control

cavity, cathode, controls, electron

345

A.M. Barnyakov, A.E. Levichev, D.A. Nikiforov
BINP SB RAS, Novosibirsk, Russia
M.V. Maltseva
NSU, Novosibirsk, Russia

The design and operation of electron RF gun with RF beam control are described. Results of numerical simulation of electromagnetic fields and beam dynamics are presented. RF gun consists of two resonators operating at E010 mode with 180 degrees phase shift at frequency of 2856 MHz. RF control is carried out via coaxial resonator with grid-cathode capacity. Accordint to result of the simulation, RF gun with RF control allows producing electron bunches with duration of 50 ps, energy of about 3 MeV and the energy spread of about 5%.

Poster TUPSA068 [0.996 MB]

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TUPSA069

Optimization of an RF Probe Vicinity for RF Gun Cavities

cavity, HOM, simulation, quadrupole

348

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

To provide electron bunches with exceptionally high brightness, RF gun cavity should operate with the extreme electric and magnetic fields. The RF probe is required for the mostly reliable and precise measurements of the RF field phase and amplitude directly from the cavity. The implementation of an RF probe in the cavity design generates a set of coupled problems, which is analyzed and compared for different operating frequencies and different RF pulse length. Both general dependencies and particularities are considered. Some recommendations for practical choice of the RF probe are presented.

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WEPSB057

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

electron, simulation, linac, bunching

493

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

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

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WEPSB064

Modifications of Electron Linear Accelerators Produced in NIIEFA for Sterilization

electron, klystron, focusing, vacuum

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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THPSC067

Coaxial Quarter Wavelength Impedance Converter for Coupling Control of Triode Cavity

impedance, cavity, coupling, electron

689

K. Torgasin, T. Kii, K. Masuda, K. Morita, K. Nagasaki, H. Ohgaki, S. Suphakul, H. Zen
Kyoto University, Kyoto, Japan

A quarter wavelength coaxial cavity has been developed for triode-type thermionic RF gun. The triode-type RF gun is a modification of present 4.5 cell thermionic RF gun of KU-FEL (Kyoto University Free Electron Laser) facility with aim to mitigate the back'bombardment effect. Thereby a coaxial quarter wavelength cavity with cathode material shall be added to the main 4.5 cell accelerating body. The coaxial cavity has the function of pre-buncher to control the injection phase and power of electron bunches into the main accelerating body*. Transient tests have demonstrated the quarter wavelength cavity to be undercoupled. However, for operation at high beam loading conditions overcoupled conditions are required. In order to control the coupling we have developed an external air side coaxial quarter wavelength impedance converter. The design of the impedance converter enables operation at high RF power (<20 kV) without changing the cavity geometry. In this work we present our design and performance of quarter wavelength impedance converter as applied to quarter wavelength triode cavity.
* K. Torgasin et al., Cold Test of the Coaxial Cavity for Thermionic Triode Type RF Gun, in Proc. IPAC, 2013, pp.324-326.

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