ERL2013 - List of Authors (Miyajima, T.)

Paper

Title

Page

Construction and Commissioning of Compact-ERL Injector at KEK

16

S. Sakanaka, M. Adachi, S. Adachi, M. Akemoto, D.A. Arakawa, S. Asaoka, K. Enami, K. Endo, S. Fukuda, T. Furuya, K. Haga, K. Hara, K. Harada, T. Honda, Y. Honda, H. Honma, T. Honma, K. Hosoyama, K. Hozumi, A. Ishii, E. Kako, Y. Kamiya, H. Katagiri, H. Kawata, Y. Kobayashi, Y. Kojima, Y. Kondou, O. A. Konstantinova, T. Kume, T. Matsumoto, H. Matsumura, H. Matsushita, S. Michizono, T. Miura, T. Miyajima, H. Miyauchi, S. Nagahashi, H. Nakai, H. Nakajima, N. Nakamura, K. Nakanishi, K. Nakao, K.N. Nigorikawa, T. Nogami, S. Noguchi, S. Nozawa, T. Obina, T. Ozaki, F. Qiu, H. Sagehashi, H. Sakai, S. Sasaki, K. Satoh, M. Satoh, Y. Seimiya, T. Shidara, M. Shimada, K. Shinoe, T. Shioya, T. Shishido, M. Tadano, T. Tahara, T. Takahashi, R. Takai, T. Takenaka, Y. Tanimoto, M. Tobiyama, K. Tsuchiya, T. Uchiyama, A. Ueda, K. Umemori, K. Watanabe, M. Yamamoto, Y. Yamamoto, Y. Yano, M. Yoshida
KEK, Ibaraki, Japan
E. Cenni
Sokendai, Ibaraki, Japan
R. Hajima, S.M. Matsuba, R. Nagai, N. Nishimori, M. Sawamura, T. Shizuma
JAEA, Ibaraki-ken, Japan
J.G. Hwang
KNU, Deagu, Republic of Korea
H. Iijima, M. Kuriki
HU/AdSM, Higashi-Hiroshima, Japan
H. Takaki
ISSP/SRL, Chiba, Japan

The Compact Energy Recovery Linac (cERL) is under construction at KEK for the future 3-GeV ERL project. During the past year, we have finished key devices, such as a 500-kV DC photocathode electron gun and superconducting (SC) cryomodules for the injector and for the main linac. We installed these devices into a shielding room of the cERL, and carried out high-voltage or high-power tests successfully. In the April of 2013, the 5-MeV injector of the cERL was completed. During April to June in 2013, we commissioned the cERL-injector successfully, and carried out beam tuning and studies. We will present the construction and commissioning of the cERL injector, together with the construction status of a return loop.

Slides WG102 [6.910 MB]

WG108

Construction of the 2nd 500 kV Photocathode DC-gun at KEK

28

M. Yamamoto, Y. Honda, M. Kobayashi, T. Miyajima, T. Uchiyama
KEK, Ibaraki, Japan
R. Hajima, S.M. Matsuba, R. Nagai, N. Nishimori
JAEA, Ibaraki-ken, Japan
M. Kuriki
HU/AdSM, Higashi-Hiroshima, Japan
H. Kurisu
Yamaguchi University, Ube-Shi, Japan
M. Kuwahara
Nagoya University, Nagoya, Japan
H. Yoshida
AIST, Tsukuba, Japan

The 2nd 500 kV DC photocathode electron gun for a ERL injector was constructed at KEK. The gun has new functions such as employ new material for ceramic insulator, insulated anode electrode for dark current monitor, repeller electrode for elimination backward ions, extreme high vacuum pumps and so on. A high voltage conditioning is just begun from this summer. In addition, a new cathode preparation system has been developed. It can prepare three cathodes simultaneously and storage many cathodes in a good vacuum condition. The detail design was finished and the construction of all in-vacuum components is progressing.

Slides WG108 [1.802 MB]

WG109

DC Photoemission Gun Development for the Compact ERL

N. Nishimori, R. Hajima, S.M. Matsuba, R. Nagai
JAEA, Ibaraki-ken, Japan
Y. Honda, T. Miyajima, M. Yamamoto
KEK, Ibaraki, Japan
H. Iijima, M. Kuriki
HU/AdSM, Higashi-Hiroshima, Japan
M. Kuwahara
Nagoya University, Nagoya, Japan

The next generation ERL light sources require a high brightness and high current electron gun. We have developed a DC photoemission electron gun for the Japanese ERL light source project. This DC gun employs a segmented insulator with guard rings to protect the insulator from field emission generated from central stem electrode. We have successfully applied 500kV on the ceramics with a cathode electrode in place and generated beam from the 500kV gun at Japan Atomic Energy Agency (JAEA) in October 2012. The gun was transferred to the compact ERL (cERL) at KEK for commissioning of the cERL injector. Details of the 500keV beam generation at JAEA as well as beam operational experience at the cERL will be presented.

Slides WG109 [1.342 MB]

WG205

Optics Design for the Commissioning of the Compact ERL Recirculation Loop

M. Shimada, K. Harada, Y. Kobayashi, T. Miyajima, N. Nakamura
KEK, Ibaraki, Japan
R. Hajima
JAEA, Ibaraki-ken, Japan

Optics design and simulation of the beam dynamics are under consideration for the beam commissioning of the compact ERL circular loop scheduled for December. The beam optics from the electron source to dump is optimized by start-to-end simulation to include the effects of space charge and CSR wake, in which the simulation code of 'General Particle Tracer, GPT' and 'elegant' are utilized in the injector and circulator, respectively. The beam loss caused by field emission of the main superconductive accelerator is also evaluated toward the beam commissioning. The compact ERL is planned to be utilized as a user experiment machine in the near future. The optics is also designed for laser-Compton X-ray source and the bunch compression simulation is performed for CSR source in the THz region. In this presentation, we introduced the current status of the optics design.

Slides WG205 [7.567 MB]

PS03

Beam Performance Measurement at Compact-ERL Injector

Y. Honda, T. Miyajima
KEK, Ibaraki, Japan

A test accelerator for a future ERL based light source has been constructed in KEK. Commissioning of the injector part has started since April 2013. In order to measure beam performance, a diagnostic beam line has been made at the downstream of the injector. We measured emittance, bunch length, energy spread, etc. This presentation reports the measurement setups and the results.

Paper	Title	Page
WG102	Construction and Commissioning of Compact-ERL Injector at KEK	16
	S. Sakanaka, M. Adachi, S. Adachi, M. Akemoto, D.A. Arakawa, S. Asaoka, K. Enami, K. Endo, S. Fukuda, T. Furuya, K. Haga, K. Hara, K. Harada, T. Honda, Y. Honda, H. Honma, T. Honma, K. Hosoyama, K. Hozumi, A. Ishii, E. Kako, Y. Kamiya, H. Katagiri, H. Kawata, Y. Kobayashi, Y. Kojima, Y. Kondou, O. A. Konstantinova, T. Kume, T. Matsumoto, H. Matsumura, H. Matsushita, S. Michizono, T. Miura, T. Miyajima, H. Miyauchi, S. Nagahashi, H. Nakai, H. Nakajima, N. Nakamura, K. Nakanishi, K. Nakao, K.N. Nigorikawa, T. Nogami, S. Noguchi, S. Nozawa, T. Obina, T. Ozaki, F. Qiu, H. Sagehashi, H. Sakai, S. Sasaki, K. Satoh, M. Satoh, Y. Seimiya, T. Shidara, M. Shimada, K. Shinoe, T. Shioya, T. Shishido, M. Tadano, T. Tahara, T. Takahashi, R. Takai, T. Takenaka, Y. Tanimoto, M. Tobiyama, K. Tsuchiya, T. Uchiyama, A. Ueda, K. Umemori, K. Watanabe, M. Yamamoto, Y. Yamamoto, Y. Yano, M. Yoshida KEK, Ibaraki, Japan E. Cenni Sokendai, Ibaraki, Japan R. Hajima, S.M. Matsuba, R. Nagai, N. Nishimori, M. Sawamura, T. Shizuma JAEA, Ibaraki-ken, Japan J.G. Hwang KNU, Deagu, Republic of Korea H. Iijima, M. Kuriki HU/AdSM, Higashi-Hiroshima, Japan H. Takaki ISSP/SRL, Chiba, Japan
	The Compact Energy Recovery Linac (cERL) is under construction at KEK for the future 3-GeV ERL project. During the past year, we have finished key devices, such as a 500-kV DC photocathode electron gun and superconducting (SC) cryomodules for the injector and for the main linac. We installed these devices into a shielding room of the cERL, and carried out high-voltage or high-power tests successfully. In the April of 2013, the 5-MeV injector of the cERL was completed. During April to June in 2013, we commissioned the cERL-injector successfully, and carried out beam tuning and studies. We will present the construction and commissioning of the cERL injector, together with the construction status of a return loop.
	Slides WG102 [6.910 MB]

WG108	Construction of the 2nd 500 kV Photocathode DC-gun at KEK	28
	M. Yamamoto, Y. Honda, M. Kobayashi, T. Miyajima, T. Uchiyama KEK, Ibaraki, Japan R. Hajima, S.M. Matsuba, R. Nagai, N. Nishimori JAEA, Ibaraki-ken, Japan M. Kuriki HU/AdSM, Higashi-Hiroshima, Japan H. Kurisu Yamaguchi University, Ube-Shi, Japan M. Kuwahara Nagoya University, Nagoya, Japan H. Yoshida AIST, Tsukuba, Japan
	The 2nd 500 kV DC photocathode electron gun for a ERL injector was constructed at KEK. The gun has new functions such as employ new material for ceramic insulator, insulated anode electrode for dark current monitor, repeller electrode for elimination backward ions, extreme high vacuum pumps and so on. A high voltage conditioning is just begun from this summer. In addition, a new cathode preparation system has been developed. It can prepare three cathodes simultaneously and storage many cathodes in a good vacuum condition. The detail design was finished and the construction of all in-vacuum components is progressing.
	Slides WG108 [1.802 MB]

WG109	DC Photoemission Gun Development for the Compact ERL
	N. Nishimori, R. Hajima, S.M. Matsuba, R. Nagai JAEA, Ibaraki-ken, Japan Y. Honda, T. Miyajima, M. Yamamoto KEK, Ibaraki, Japan H. Iijima, M. Kuriki HU/AdSM, Higashi-Hiroshima, Japan M. Kuwahara Nagoya University, Nagoya, Japan
	The next generation ERL light sources require a high brightness and high current electron gun. We have developed a DC photoemission electron gun for the Japanese ERL light source project. This DC gun employs a segmented insulator with guard rings to protect the insulator from field emission generated from central stem electrode. We have successfully applied 500kV on the ceramics with a cathode electrode in place and generated beam from the 500kV gun at Japan Atomic Energy Agency (JAEA) in October 2012. The gun was transferred to the compact ERL (cERL) at KEK for commissioning of the cERL injector. Details of the 500keV beam generation at JAEA as well as beam operational experience at the cERL will be presented.
	Slides WG109 [1.342 MB]

WG205	Optics Design for the Commissioning of the Compact ERL Recirculation Loop
	M. Shimada, K. Harada, Y. Kobayashi, T. Miyajima, N. Nakamura KEK, Ibaraki, Japan R. Hajima JAEA, Ibaraki-ken, Japan
	Optics design and simulation of the beam dynamics are under consideration for the beam commissioning of the compact ERL circular loop scheduled for December. The beam optics from the electron source to dump is optimized by start-to-end simulation to include the effects of space charge and CSR wake, in which the simulation code of 'General Particle Tracer, GPT' and 'elegant' are utilized in the injector and circulator, respectively. The beam loss caused by field emission of the main superconductive accelerator is also evaluated toward the beam commissioning. The compact ERL is planned to be utilized as a user experiment machine in the near future. The optics is also designed for laser-Compton X-ray source and the bunch compression simulation is performed for CSR source in the THz region. In this presentation, we introduced the current status of the optics design.
	Slides WG205 [7.567 MB]

PS03	Beam Performance Measurement at Compact-ERL Injector
	Y. Honda, T. Miyajima KEK, Ibaraki, Japan
	A test accelerator for a future ERL based light source has been constructed in KEK. Commissioning of the injector part has started since April 2013. In order to measure beam performance, a diagnostic beam line has been made at the downstream of the injector. We measured emittance, bunch length, energy spread, etc. This presentation reports the measurement setups and the results.