LINAC2014 - Classification: 01 Electron Accelerators and Applications / 1G Other Electron Accelerators

Paper	Title	Page
MOPP015	High Energy Electron Radiography Experiment Research Based on Picosecond Pulse-width Bunch	76
MOPOL01	use link to see paper's listing under its alternate paper code
	Q.T. Zhao, S. Cao, R. Cheng, X.K. Shen, Z.M. Zhang, Y.T. Zhao IMP, Lanzhou, People's Republic of China Y.-C. Du TUB, Beijing, People's Republic of China W. Gai ANL, Argonne, Illinois, USA
	A new scheme is proposed that high energy electron beam as a probe is used for time resolved imaging measurement of high energy density materials, especially for high energy density matter and inertial confinement fusion. The first picosecond pulse-width electron radiography experiment was achieved by Institute of Modern Physics, Chinese Academy of Sciences and Tinghua University (THU), based on THU Linear electron accelerator (LINAC). It is used for principle test and certifying that this kind of LINAC with ultra-short pulse electron bunch can be used for electron radiography. The experiment results, such as magnifying factor and the imaging distortion, are consistent with the beam optical theory well. The 2.5 um RMS spatial resolution has been gotten with magnifying factor 46, with no optimization the imaging lens section. It is found that in the certain range of magnifying factor, the RMS spatial resolution will get better with bigger magnifying factor. The details of experiment set up, results, analysis and discussions are presented here.
	Poster MOPP015 [2.866 MB]

MOPP098	Physical Starting of the First and Second Section of Accelerator Linac-800	288
	V. Kobets, N. Balalykin, I.N. Meshkov, V. Minashkin, G. Shirkov JINR, Dubna, Moscow Region, Russia V. Shabratov JINR/VBLHEP, Moscow, Russia
	In the report discusses the modernization of linear electron accelerator MEA (Medium Energy Accelerator). The aim is to develop a set of MEAs based free-electron lasers, imposed a number of emission wavelengths from infrared to ultraviolet. In work presents the results of the physical starting of the first and second stations accelerating electron linear accelerator LINAC-800, as well as start infrared undulator. We discuss the work program for this accelerator.

MOPP128	Bridging the Gap Between Conventional RF Acceleration and Laser Driven Acceleration	358
MOPOL04	use link to see paper's listing under its alternate paper code
	M.V. Fazio, V.A. Dolgashev, S.G. Tantawi SLAC, Menlo Park, California, USA
	For decades conventional RF accelerators have been built and operated with ever increasing capability through a few tens of gigahertz in frequency. More recent research takes advantage of the continuing development of high peak power short pulse lasers to drive accelerator structures at optical frequencies. This jump from RF to optical frequencies skips four orders of magnitude in wavelength. With recent experiments that demonstrate high gradients in metallic structures at millimeter wavelengths one is compelled to consider the viability of new approaches for acceleration in the millimeter-wave to terahertz regime. This paper will explore some of these possibilities.

TUPP007	Multi Gigawatt High Current Pulsed Electron Accelerator Technology Development Program at BARC	456
	A. Sharma, R. Agarwal, M. Beg, R. Chandra, H. Choudhary, L.M. Gantayet, S.R. Ghodke, TS. Kolge, R. Kumar, S. Mitra, K.C. Mittal, A.S. Patel, A. Roy, P.C. Saroj, K. Senthil, V.K. Sharma, S.K. Singh BARC, Mumbai, India
	High current intense electron beams were investigated earlier for Flash X-rays and nuclear electromagnetic pulse generation. Starting with moderate parameters of 200 kV, 6 kA, 60 ns pulsed electron beam source from a system named Kilo Ampere Linear Injector (KALI-75) our latest development is KALI-30 GW system rated for 1 MV, 30 kA, 80 ns. First repetitive pulse LINAC without spark gap switching was developed as Linear Induction Accelerator (LIA-200) for technology demonstrations at 100 Hz. Also a repetitive Marx generator coupled reflex triode system to operate at 10 Hz. Next to this series of development LIA-400 has been developed to a capacity of 400 kV, 4 kA, 100 ns, 300 Hz. To make these pulse power systems applicable for big LINAC projects like nToF studies or ADS program, a high current electron gun has also been developed to give 100 A, 2 ns,10 Hz pulses. References [1].Amitava Roy et al, Journal of App. Physics 103, 2008. [2].D. D. P. Kumar, et al. Rev. Sci. Inst., vol. 78, no. 11, 2007. [3].Archana Sharma, et al., IEEE-PS Vol. 39, No. 5, 2011.

TUPP120	Commissioning of BINP Injection Complex VEPP-5	702
	A.A. Starostenko, A.E. Levichev, D.A. Nikiforov BINP SB RAS, Novosibirsk, Russia
	New BINP injector complex VEPP-5 consist of S-band linear accelerators (270 and 420MeV), positron converter (at 270 MeV) and damping ring. The injector complex will provide e⁺/e⁻ particles for the 2 colliders at BINP - VEPP-4M and VEPP-2000. After a long construction period the injector is in its commissioning stage now. Positron rate production of 6·10⁸ positrons/pulse and conversion yield of 0.14/GeV and stored positron beam current of 70mA were already achieved.

THPP035	Deceleration Measurements of an Electron Beam in the CLIC Test Facility 3	920
SUPG003	use link to see paper's listing under its alternate paper code
	R.L. Lillestøl, S. Döbert CERN, Geneva, Switzerland E. Adli University of Oslo, Oslo, Norway
	The Test Beam Line at the CLIC Test Facility 3 at CERN is a proof-of-principle of the future CLIC decelerators, which will extract a large amount of beam energy for acceleration of the main CLIC beams. The current beamline consists of a FODO lattice with 13 Power Extraction and Transfer Structures (PETS). We discuss beam deceleration measurements of up to 37 %, taking into account effects from the bunch length and the bunch phase. The 12 GHz phase is reproduced based on measurements in a PETS with an uncombined beam. The spectrometer measurements are also compared to predictions based on the beam current and on the produced rf power in the PETS, as well as particle tracking simulations with the Placet code.

THPP123	Experience of Operation of the Electron Linear Accelerator Based on Parallel Coupled Accelerating Structure	1144
	A.E. Levichev, A.M. Barnyakov, D.A. Nikiforov BINP SB RAS, Novosibirsk, Russia Y.D. Chernousov ICKC, Novosibirsk, Russia V. Ivannikov, I.V. Shebolaev ICKC SB RAS, Novosibirsk, Russia
	An electron linear accelerator based on parallel coupled accelerating structure was developed and produced by Budker Institute of Nuclear Physics SB RAS and Institute of Chemical Kinetics and Combustion SB RAS. Short and long versions of the accelerating structure at 2450 MHz were built. For easy disassembly electrical and vacuum connections of the first (short) structure were made using indium seals. The second structure was brazed. Now the accelerator is in operation and used to study the accelerating and RF technologies. In the report the features of the accelerator are presented, including the design and characteristics of RF antenna and solid-state switch for the electron gun. Test results of the long parallel coupled accelerating structure are discussed. Observations made on the short structure surface after it had been opened are depicted. Now the short structure undergoes certain modifications in order to accelerate higher beam currents.

Paper

Title

Page

MOPP015

High Energy Electron Radiography Experiment Research Based on Picosecond Pulse-width Bunch

76

MOPOL01

use link to see paper's listing under its alternate paper code

Q.T. Zhao, S. Cao, R. Cheng, X.K. Shen, Z.M. Zhang, Y.T. Zhao
IMP, Lanzhou, People's Republic of China
Y.-C. Du
TUB, Beijing, People's Republic of China
W. Gai
ANL, Argonne, Illinois, USA

A new scheme is proposed that high energy electron beam as a probe is used for time resolved imaging measurement of high energy density materials, especially for high energy density matter and inertial confinement fusion. The first picosecond pulse-width electron radiography experiment was achieved by Institute of Modern Physics, Chinese Academy of Sciences and Tinghua University (THU), based on THU Linear electron accelerator (LINAC). It is used for principle test and certifying that this kind of LINAC with ultra-short pulse electron bunch can be used for electron radiography. The experiment results, such as magnifying factor and the imaging distortion, are consistent with the beam optical theory well. The 2.5 um RMS spatial resolution has been gotten with magnifying factor 46, with no optimization the imaging lens section. It is found that in the certain range of magnifying factor, the RMS spatial resolution will get better with bigger magnifying factor. The details of experiment set up, results, analysis and discussions are presented here.

Poster MOPP015 [2.866 MB]

MOPP098

Physical Starting of the First and Second Section of Accelerator Linac-800

288

V. Kobets, N. Balalykin, I.N. Meshkov, V. Minashkin, G. Shirkov
JINR, Dubna, Moscow Region, Russia
V. Shabratov
JINR/VBLHEP, Moscow, Russia

In the report discusses the modernization of linear electron accelerator MEA (Medium Energy Accelerator). The aim is to develop a set of MEAs based free-electron lasers, imposed a number of emission wavelengths from infrared to ultraviolet. In work presents the results of the physical starting of the first and second stations accelerating electron linear accelerator LINAC-800, as well as start infrared undulator. We discuss the work program for this accelerator.

MOPP128

Bridging the Gap Between Conventional RF Acceleration and Laser Driven Acceleration

358

MOPOL04

use link to see paper's listing under its alternate paper code

M.V. Fazio, V.A. Dolgashev, S.G. Tantawi
SLAC, Menlo Park, California, USA

For decades conventional RF accelerators have been built and operated with ever increasing capability through a few tens of gigahertz in frequency. More recent research takes advantage of the continuing development of high peak power short pulse lasers to drive accelerator structures at optical frequencies. This jump from RF to optical frequencies skips four orders of magnitude in wavelength. With recent experiments that demonstrate high gradients in metallic structures at millimeter wavelengths one is compelled to consider the viability of new approaches for acceleration in the millimeter-wave to terahertz regime. This paper will explore some of these possibilities.

TUPP007

Multi Gigawatt High Current Pulsed Electron Accelerator Technology Development Program at BARC

456

A. Sharma, R. Agarwal, M. Beg, R. Chandra, H. Choudhary, L.M. Gantayet, S.R. Ghodke, TS. Kolge, R. Kumar, S. Mitra, K.C. Mittal, A.S. Patel, A. Roy, P.C. Saroj, K. Senthil, V.K. Sharma, S.K. Singh
BARC, Mumbai, India

High current intense electron beams were investigated earlier for Flash X-rays and nuclear electromagnetic pulse generation. Starting with moderate parameters of 200 kV, 6 kA, 60 ns pulsed electron beam source from a system named Kilo Ampere Linear Injector (KALI-75) our latest development is KALI-30 GW system rated for 1 MV, 30 kA, 80 ns. First repetitive pulse LINAC without spark gap switching was developed as Linear Induction Accelerator (LIA-200) for technology demonstrations at 100 Hz. Also a repetitive Marx generator coupled reflex triode system to operate at 10 Hz. Next to this series of development LIA-400 has been developed to a capacity of 400 kV, 4 kA, 100 ns, 300 Hz. To make these pulse power systems applicable for big LINAC projects like nToF studies or ADS program, a high current electron gun has also been developed to give 100 A, 2 ns,10 Hz pulses.
References
[1].Amitava Roy et al, Journal of App. Physics 103, 2008.
[2].D. D. P. Kumar, et al. Rev. Sci. Inst., vol. 78, no. 11, 2007.
[3].Archana Sharma, et al., IEEE-PS Vol. 39, No. 5, 2011.

TUPP120

Commissioning of BINP Injection Complex VEPP-5

702

A.A. Starostenko, A.E. Levichev, D.A. Nikiforov
BINP SB RAS, Novosibirsk, Russia

New BINP injector complex VEPP-5 consist of S-band linear accelerators (270 and 420MeV), positron converter (at 270 MeV) and damping ring. The injector complex will provide e⁺/e⁻ particles for the 2 colliders at BINP - VEPP-4M and VEPP-2000. After a long construction period the injector is in its commissioning stage now. Positron rate production of 6·10⁸ positrons/pulse and conversion yield of 0.14/GeV and stored positron beam current of 70mA were already achieved.

THPP035

Deceleration Measurements of an Electron Beam in the CLIC Test Facility 3

920

SUPG003

use link to see paper's listing under its alternate paper code

R.L. Lillestøl, S. Döbert
CERN, Geneva, Switzerland
E. Adli
University of Oslo, Oslo, Norway

The Test Beam Line at the CLIC Test Facility 3 at CERN is a proof-of-principle of the future CLIC decelerators, which will extract a large amount of beam energy for acceleration of the main CLIC beams. The current beamline consists of a FODO lattice with 13 Power Extraction and Transfer Structures (PETS). We discuss beam deceleration measurements of up to 37 %, taking into account effects from the bunch length and the bunch phase. The 12 GHz phase is reproduced based on measurements in a PETS with an uncombined beam. The spectrometer measurements are also compared to predictions based on the beam current and on the produced rf power in the PETS, as well as particle tracking simulations with the Placet code.

THPP123

Experience of Operation of the Electron Linear Accelerator Based on Parallel Coupled Accelerating Structure

1144

A.E. Levichev, A.M. Barnyakov, D.A. Nikiforov
BINP SB RAS, Novosibirsk, Russia
Y.D. Chernousov
ICKC, Novosibirsk, Russia
V. Ivannikov, I.V. Shebolaev
ICKC SB RAS, Novosibirsk, Russia

An electron linear accelerator based on parallel coupled accelerating structure was developed and produced by Budker Institute of Nuclear Physics SB RAS and Institute of Chemical Kinetics and Combustion SB RAS. Short and long versions of the accelerating structure at 2450 MHz were built. For easy disassembly electrical and vacuum connections of the first (short) structure were made using indium seals. The second structure was brazed. Now the accelerator is in operation and used to study the accelerating and RF technologies. In the report the features of the accelerator are presented, including the design and characteristics of RF antenna and solid-state switch for the electron gun. Test results of the long parallel coupled accelerating structure are discussed. Observations made on the short structure surface after it had been opened are depicted. Now the short structure undergoes certain modifications in order to accelerate higher beam currents.