RuPAC2021 - List of Keywords (cathode)

Paper	Title	Other Keywords	Page
MOY05	Linear Induction Accelerator LIA-2 Upgrade	simulation, focusing, induction, space-charge	17
	D.A. Starostenko BINP SB RAS, Novosibirsk, Russia
	X-ray complexes based on a linear induction accelerator are designed to study of high density objects. It requires of high-current electron beam to obtain a small spot and bright x-ray source using a conversion target. The electrons source in such installations is injectors capable generate pulses with a duration from tens of nanoseconds to several microseconds and a current of several kiloamperes. The transportation and focusing such beams into diameter about 1 mm is difficult due to of the space charge effect. In similar induction accelerators (DARHT, AIRIX, FXR, etc.), auto-emission cathodes are used to obtain high-current electron beams. The use of a thermionic cathode, in compared to auto-emission cathode, provides stable generation of several pulses with a time interval of several microseconds, but makes high requirements on the injector vacuum system: not less than 10^-7 Torr.
	Slides MOY05 [3.946 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOY05
About •	Received ※ 24 September 2021 — Revised ※ 05 October 2021 — Accepted ※ 13 October 2021 — Issued ※ 23 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPSA08	Beam Dynamics Simulation in a Linear Electron Accelerator - Injector for the 4th Generation Specialized Synchrotron Radiation Source USSR	simulation, gun, linac, injection	149
	I.A. Ashanin, Yu.D. Kliuchevskaia, S.M. Polozov, A.I. Pronikov MEPhI, Moscow, Russia I.A. Ashanin, S.M. Polozov, A.I. Pronikov NRC, Moscow, Russia
	USSR project (Ultimate Source of Synchrotron Radiation, 4th generation synchrotron light source) is being developed in the NRC «Kurchatov Institute». This Light Source will include both storage ring and soft FEL (Free Electron Laser) and one linac with an energyof 6 GeV, which is planned to be used both for beam injection into storage ring (top-up injection) and as a high-brightness bunch driver for FEL. It is suggested to use two front-ends in this linac: RF-gun with thermionic cathode with adiabatic buncher for injection into storage ring and RF-gun with photocathode will use to generate a bunch train for FEL. The purpose of this work was to development a general layout of the top-up linac with the aim of minimize of the beam energy spread and transverse emittance at the exit and analysis the front-to-end beam dynamics in this linear accelerator.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA08
About •	Received ※ 29 September 2021 — Revised ※ 30 September 2021 — Accepted ※ 07 October 2021 — Issued ※ 09 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPSB04	Features of the Electronic Cooling System of the NICA Booster	electron, booster, experiment, gun	236
	A.G. Kobets, E.V. Ahmanova, S.A. Melnikov, I.N. Meshkov, O. Orlov, S.V. Semenov, A.S. Sergeev, A.A. Sidorin JINR, Dubna, Moscow Region, Russia A.V. Butenko, K.G. Osipov, A.O. Sidorin, E. Syresin JINR/VBLHEP, Dubna, Moscow region, Russia A.V. Ivanov BINP SB RAS, Novosibirsk, Russia
	The report presents the results obtained during the commissioning the Electron Cooling System (ECS) of the Booster, the first in the chain of three synchrotrons of the NICA accelerator complex. The work was performed without an ion beam and with a circulating ion beam He¹⁺. In the work with a circulating ion beam, the effect of reducing the lifetime of the circulating ions was observed when the velocities of the cooling electrons and the cooled ions coincide. The dependences of the electron beam current on the ECS parameters for different electron energy values were experimentally obtained. The specific features of operation of electron gun of the NICA Booster are hollow beam formation and the phenomenon of virtual cathode creation confirmed both experiments and by numerical simulation.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB04
About •	Received ※ 20 September 2021 — Revised ※ 01 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 13 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPSB40	He⁺ Ion Source for the NICA Injection Complex	ion-source, plasma, injection, LEBT	316
	B.V. Golovenskiy, V.A. Monchinsky JINR, Dubna, Moscow Region, Russia A.M. Bazanov, A.S. Bogatov, D.E. Donets, D.S. Letkin, D.O. Leushin, K.A. Levterov, V.V. Mialkovskiy, D.O. Ponkin, I.V. Shirikov JINR/VBLHEP, Dubna, Moscow region, Russia
	A mono-ion source of single-charged helium of high intensity has been created to confirm the declared parameters of Heavy Ion Linear Accelerator (HILAC) and for the injection into superconducting synchrotron (SC) Booster during the first run. The paper presents the design of the He⁺ ion source, test bench for the TOF measurements and acceleration beam developed at VBLHEP, JINR. The results of the tests of the source are presented. During the tests the intense beams of ions 50 mA of He⁺ were produced.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB40
About •	Received ※ 25 September 2021 — Revised ※ 08 October 2021 — Accepted ※ 13 October 2021 — Issued ※ 18 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPSB43	Optimization of the RF-Gun With Photocathode at Operating Frequency 2800 MHz for the New Injection Linac for USSR Project	gun, simulation, beam-loading, injection	319
	Yu.D. Kliuchevskaia, S.M. Polozov MEPhI, Moscow, Russia S.M. Polozov NRC, Moscow, Russia
	The beam dynamics analysis of the RF-gun with photocathode for Russian 4th generation light source Ultimate Source of Synchrotron Radiation (USSR-4) was done to chose the optimal length of the section and cell’s number and also to define optimal accelerating gradient and injection phase. The simulation of electrodynamics parameters and RF field distribution in the RF-gun based on 3.5-, 5.5- and 7.5-cell pi-mode standing wave accelerating structure at operating frequency 2800 MHz was done. The influence of the beam loading effect on the field amplitude and beam dynamics was the main purpose of study also. The beam dynamics simulation results will present in the report and optimal RF-gun parameters will discuss.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB43
About •	Received ※ 15 September 2021 — Revised ※ 29 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 23 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THC03	Numerical Simulations of Space Charge Dominated Beam Dynamics in Experimentally Optimized PITZ RF Photogun	electron, experiment, space-charge, laser	89
	V.I. Rashchikov, S.M. Polozov MEPhI, Moscow, Russia
	Funding: The reported study was partly funded by RFBR, project number 19-29-12036 Discrepancies between experimental data and comput-er simulation results of picosecond highly charged beam photoemission are discussed. New space charge limited emission numerical model with positively charged ions arising in the cathode region and dynamically changing during the emission is presented. Estimates on the time characteristics of the charge migrating process in the semiconductor region are given. The numerical results are compared with the results of other numerical models and with experimental observations at the Photo Injector Test facility at DESY in Zeuthen (PITZ)
	Slides THC03 [1.292 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-THC03
About •	Received ※ 21 September 2021 — Accepted ※ 23 September 2021 — Issued ※ 17 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

FRB03	Upgrated the Extraction Device of Focused Electron Beam Into the Atmosphere	electron, focusing, extraction, permanent-magnet	114
	E.V. Domarov, I. Chakin, V.G. Cherepkov, S. Fadeev, M. Golkovsky, Yu.I. Golubenko, A.I. Korchagin, N.K. Kuksanov, A. Lavrukhin, P.I. Nemytov, R.A. Salimov, A.V. Semenov BINP SB RAS, Novosibirsk, Russia
	For over 30 years, an extraction device has been successfully working in BINP at the ELV-6 accelerator to extract a focused beam of electrons into the atmosphere. The accelerating tube with permanent magnetic lenses was used in this installation. The design of these accelerator tubes with magnetic lenses is rather complicated. Recently, simpler design and high reliability accelerating tubes with big aperture is operating in ELV accelerators. For this reason, the problem number one at present is to develop the extraction device, capable of reliably working with serial accelerator tubes, of the ELV accelerator with power up to100 kW. The lens L1 is located directly at the lower end of the accelerating tube. Passing the lens L1, the beam is focused near the diaphragm D6 and increases to a diameter of 10 mm in the diaphragm D5. For passing the beam along the axis of the diaphragms, there are corrections coils C1 C2 C3. The diameter of diaphragm hole D1 is the most critical, because it determines the flow of gas that should be pumped out in the following steps of the vacuum system. Measurements of the parameters of a high-power electron beam were carried out up to a power of 100 kW. As a result of the made experiments the minimum diameter of the beam at the exit from the extractions device has been 2 mm at the energy of 1,4 MeV and the beam current of 60 mA.
	Slides FRB03 [2.785 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-FRB03
About •	Received ※ 02 September 2021 — Revised ※ 15 September 2021 — Accepted ※ 23 September 2021 — Issued ※ 19 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

MOY05

Linear Induction Accelerator LIA-2 Upgrade

simulation, focusing, induction, space-charge

17

D.A. Starostenko
BINP SB RAS, Novosibirsk, Russia

X-ray complexes based on a linear induction accelerator are designed to study of high density objects. It requires of high-current electron beam to obtain a small spot and bright x-ray source using a conversion target. The electrons source in such installations is injectors capable generate pulses with a duration from tens of nanoseconds to several microseconds and a current of several kiloamperes. The transportation and focusing such beams into diameter about 1 mm is difficult due to of the space charge effect. In similar induction accelerators (DARHT, AIRIX, FXR, etc.), auto-emission cathodes are used to obtain high-current electron beams. The use of a thermionic cathode, in compared to auto-emission cathode, provides stable generation of several pulses with a time interval of several microseconds, but makes high requirements on the injector vacuum system: not less than 10^-7 Torr.

Slides MOY05 [3.946 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOY05

About •

Received ※ 24 September 2021 — Revised ※ 05 October 2021 — Accepted ※ 13 October 2021 — Issued ※ 23 October 2021

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPSA08

Beam Dynamics Simulation in a Linear Electron Accelerator - Injector for the 4th Generation Specialized Synchrotron Radiation Source USSR

simulation, gun, linac, injection

149

I.A. Ashanin, Yu.D. Kliuchevskaia, S.M. Polozov, A.I. Pronikov
MEPhI, Moscow, Russia
I.A. Ashanin, S.M. Polozov, A.I. Pronikov
NRC, Moscow, Russia

USSR project (Ultimate Source of Synchrotron Radiation, 4th generation synchrotron light source) is being developed in the NRC «Kurchatov Institute». This Light Source will include both storage ring and soft FEL (Free Electron Laser) and one linac with an energyof 6 GeV, which is planned to be used both for beam injection into storage ring (top-up injection) and as a high-brightness bunch driver for FEL. It is suggested to use two front-ends in this linac: RF-gun with thermionic cathode with adiabatic buncher for injection into storage ring and RF-gun with photocathode will use to generate a bunch train for FEL. The purpose of this work was to development a general layout of the top-up linac with the aim of minimize of the beam energy spread and transverse emittance at the exit and analysis the front-to-end beam dynamics in this linear accelerator.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA08

About •

Received ※ 29 September 2021 — Revised ※ 30 September 2021 — Accepted ※ 07 October 2021 — Issued ※ 09 October 2021

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPSB04

Features of the Electronic Cooling System of the NICA Booster

electron, booster, experiment, gun

236

A.G. Kobets, E.V. Ahmanova, S.A. Melnikov, I.N. Meshkov, O. Orlov, S.V. Semenov, A.S. Sergeev, A.A. Sidorin
JINR, Dubna, Moscow Region, Russia
A.V. Butenko, K.G. Osipov, A.O. Sidorin, E. Syresin
JINR/VBLHEP, Dubna, Moscow region, Russia
A.V. Ivanov
BINP SB RAS, Novosibirsk, Russia

The report presents the results obtained during the commissioning the Electron Cooling System (ECS) of the Booster, the first in the chain of three synchrotrons of the NICA accelerator complex. The work was performed without an ion beam and with a circulating ion beam He¹⁺. In the work with a circulating ion beam, the effect of reducing the lifetime of the circulating ions was observed when the velocities of the cooling electrons and the cooled ions coincide. The dependences of the electron beam current on the ECS parameters for different electron energy values were experimentally obtained. The specific features of operation of electron gun of the NICA Booster are hollow beam formation and the phenomenon of virtual cathode creation confirmed both experiments and by numerical simulation.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB04

About •

Received ※ 20 September 2021 — Revised ※ 01 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 13 October 2021

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPSB40

He⁺ Ion Source for the NICA Injection Complex

ion-source, plasma, injection, LEBT

316

B.V. Golovenskiy, V.A. Monchinsky
JINR, Dubna, Moscow Region, Russia
A.M. Bazanov, A.S. Bogatov, D.E. Donets, D.S. Letkin, D.O. Leushin, K.A. Levterov, V.V. Mialkovskiy, D.O. Ponkin, I.V. Shirikov
JINR/VBLHEP, Dubna, Moscow region, Russia

A mono-ion source of single-charged helium of high intensity has been created to confirm the declared parameters of Heavy Ion Linear Accelerator (HILAC) and for the injection into superconducting synchrotron (SC) Booster during the first run. The paper presents the design of the He⁺ ion source, test bench for the TOF measurements and acceleration beam developed at VBLHEP, JINR. The results of the tests of the source are presented. During the tests the intense beams of ions 50 mA of He⁺ were produced.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB40

About •

Received ※ 25 September 2021 — Revised ※ 08 October 2021 — Accepted ※ 13 October 2021 — Issued ※ 18 October 2021

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPSB43

Optimization of the RF-Gun With Photocathode at Operating Frequency 2800 MHz for the New Injection Linac for USSR Project

gun, simulation, beam-loading, injection

319

Yu.D. Kliuchevskaia, S.M. Polozov
MEPhI, Moscow, Russia
S.M. Polozov
NRC, Moscow, Russia

The beam dynamics analysis of the RF-gun with photocathode for Russian 4th generation light source Ultimate Source of Synchrotron Radiation (USSR-4) was done to chose the optimal length of the section and cell’s number and also to define optimal accelerating gradient and injection phase. The simulation of electrodynamics parameters and RF field distribution in the RF-gun based on 3.5-, 5.5- and 7.5-cell pi-mode standing wave accelerating structure at operating frequency 2800 MHz was done. The influence of the beam loading effect on the field amplitude and beam dynamics was the main purpose of study also. The beam dynamics simulation results will present in the report and optimal RF-gun parameters will discuss.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB43

About •

Received ※ 15 September 2021 — Revised ※ 29 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 23 October 2021

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THC03

Numerical Simulations of Space Charge Dominated Beam Dynamics in Experimentally Optimized PITZ RF Photogun

electron, experiment, space-charge, laser

89

V.I. Rashchikov, S.M. Polozov
MEPhI, Moscow, Russia

Funding: The reported study was partly funded by RFBR, project number 19-29-12036
Discrepancies between experimental data and comput-er simulation results of picosecond highly charged beam photoemission are discussed. New space charge limited emission numerical model with positively charged ions arising in the cathode region and dynamically changing during the emission is presented. Estimates on the time characteristics of the charge migrating process in the semiconductor region are given. The numerical results are compared with the results of other numerical models and with experimental observations at the Photo Injector Test facility at DESY in Zeuthen (PITZ)

Slides THC03 [1.292 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-THC03

About •

Received ※ 21 September 2021 — Accepted ※ 23 September 2021 — Issued ※ 17 October 2021

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

FRB03

Upgrated the Extraction Device of Focused Electron Beam Into the Atmosphere

electron, focusing, extraction, permanent-magnet

114

E.V. Domarov, I. Chakin, V.G. Cherepkov, S. Fadeev, M. Golkovsky, Yu.I. Golubenko, A.I. Korchagin, N.K. Kuksanov, A. Lavrukhin, P.I. Nemytov, R.A. Salimov, A.V. Semenov
BINP SB RAS, Novosibirsk, Russia

For over 30 years, an extraction device has been successfully working in BINP at the ELV-6 accelerator to extract a focused beam of electrons into the atmosphere. The accelerating tube with permanent magnetic lenses was used in this installation. The design of these accelerator tubes with magnetic lenses is rather complicated. Recently, simpler design and high reliability accelerating tubes with big aperture is operating in ELV accelerators. For this reason, the problem number one at present is to develop the extraction device, capable of reliably working with serial accelerator tubes, of the ELV accelerator with power up to100 kW. The lens L1 is located directly at the lower end of the accelerating tube. Passing the lens L1, the beam is focused near the diaphragm D6 and increases to a diameter of 10 mm in the diaphragm D5. For passing the beam along the axis of the diaphragms, there are corrections coils C1 C2 C3. The diameter of diaphragm hole D1 is the most critical, because it determines the flow of gas that should be pumped out in the following steps of the vacuum system. Measurements of the parameters of a high-power electron beam were carried out up to a power of 100 kW. As a result of the made experiments the minimum diameter of the beam at the exit from the extractions device has been 2 mm at the energy of 1,4 MeV and the beam current of 60 mA.

Slides FRB03 [2.785 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-FRB03

About •

Received ※ 02 September 2021 — Revised ※ 15 September 2021 — Accepted ※ 23 September 2021 — Issued ※ 19 October 2021

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)