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Nishitani, Tomohiro; Hajima, Ryoichi; Iijima, Hokuto; Nagai, Ryoji; Sawamura, Masaru; Kikuzawa, Nobuhiro; Nishimori, Nobuyuki; Minehara, Eisuke; Tabuchi, Masao*; Noritake, Yosuke*; et al.
Proceedings of 28th International Free Electron Laser Conference (FEL 2006) (CD-ROM), p.319 - 322, 2006/08
ERL light source and FEL require an electron beam of large current and small emittance. In order to realize an electron gun satisfying such requirements,we started developments of a photocathode DC-gun and a new-type NEA-photocathode. The DC-gun consists of a chamber to activate NEA-surface, a 250 keV acceleration chamber, and a mode-locked Ti:Sapphire laser. Since extreme high vacuum is essential to obtain a long-life photocathode, we adopt a load-lock system for transporting a photocathode between the chambers, each of which is equipped with an NEG pump. Up to now, we fabricated an electrodes chamber and a high voltage terminal of 250 kV and we succeeded in a 250kV high voltage test. We also have suggested a superlattice photocathode as a new-type photocathode with higher performance than an existing technology. Up to now, we fabricated photocathode samples by molecular beam epitaxy and measured a quantum efficiency after NEA-surface activation.
Nishitani, Tomohiro; Tabuchi, Masao*; Noritake, Yosuke*; Hayashitani, Haruhiko*; Hajima, Ryoichi; Iijima, Hokuto; Nagai, Ryoji; Sawamura, Masaru; Kikuzawa, Nobuhiro; Nishimori, Nobuyuki; et al.
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM), p.45 - 47, 2006/00
no abstracts in English
Nishitani, Tomohiro; Hajima, Ryoichi; Tabuchi, Masao*; Noritake, Yosuke*; Hayashitani, Haruhiko*
no journal, ,
no abstracts in English
Nishitani, Tomohiro; Hajima, Ryoichi; Takeda, Yoshikazu*; Tabuchi, Masao*; Noritake, Yosuke*
no journal, ,
no abstracts in English
Hajima, Ryoichi; Nishitani, Tomohiro; Iijima, Hokuto; Nagai, Ryoji; Nishimori, Nobuyuki; Tabuchi, Masao*; Noritake, Yosuke*; Hayashitani, Haruhiko*; Takeda, Yoshikazu*
no journal, ,
no abstracts in English
Nishitani, Tomohiro; Hajima, Ryoichi; Takeda, Yoshikazu*; Tabuchi, Masao*; Noritake, Yosuke*; Hayashitani, Haruhiko*
no journal, ,
no abstracts in English