ERL2013 - List of Authors (Kuwahara, M.)

Paper

Title

Page

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]

Paper	Title	Page
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]