Ion generation method for TIARA Ion Implanter

Yamada, Keisuke; Okoshi, Kiyonori; Saito, Yuichi; Orimo, Takao*; Omae, Akiomi*; Yamada, Naoto*; Mizuhashi, Kiyoshi

JAEA-Technology 2008-090, 95 Pages, 2009/03

JAEA-Technology-2008-090.pdf:11.36MB

The 400 kV ion implanter at the Takasaki Ion Accelerators for Advanced Radiation Application facility (TIARA) provides ion beams for various experiments of research and development (R&D's) mainly on materials science and biotechnology using Freeman ion sources. Two methods of ionization are generally used to a Freeman ion source. In one method, a sample gas is directly fed to the plasma chamber, and in the other, vapor of a solid material having high vapor pressure is vaporized by an oven and fed. Those methods, however, can supply limited number of ion species of those required from various R&D's. We have developed new methods available to materials which are difficult to vaporize by an oven: the disc method for high melting point materials, the SF plasma method for high melting point and low vapor pressure materials, the filament method for metals with melting point higher than 2400 C, and one of them is chosen according to the nature of a material. Forty four ion species from hydrogen to bismuth are generated by using the Freeman ion sources to date. Furthermore, a small ECR (electron cyclotron resonance) ion source is also developed to generate multiply charged ions for acceleration to higher energies.

Operation of the electrostatic accelerators

Mizuhashi, Kiyoshi; Uno, Sadanori; Okoshi, Kiyonori; Chiba, Atsuya; Yamada, Keisuke; Saito, Yuichi; Ishii, Yasuyuki; Sato, Takahiro; Sakai, Takuro; Yokota, Wataru; et al.

JAEA-Review 2006-042, JAEA Takasaki Annual Report 2005, P. 197, 2007/02

https://jopss.jaea.go.jp/pdfdata/JAEA-Review-2006-042.pdf

Three electrostatic accelerators were almost operated smoothly for various experiments in FY 2005. The yearly operation time of each accelerator amounts to 1974, 2359.9, 1859.9 hour for the tandem, the single-ended and the ion implanter, respectively. Main trouble was a short circuit of a part of the ion source in the single-ended accelerator. This lets to the suspension of operation for fifteen days. As features in FY 2005, the generation of the power cut by thunderbolts and large earthquakes were abounding. By this natural force, the Turbo-molecular pump was broken, experiment was interrupted and then the inspection of accelerator facility was carried out every time. New beam acceleration and improvement of each accelerator were carried out.

Production of fullerene (C) ions by freeman ion source

Okoshi, Kiyonori; Saito, Yuichi; Orimo, Takao*; Omae, Akiomi*; Takada, Isao; Tajima, Satoshi

JAERI-Review 2003-033, TIARA Annual Report 2002, p.323 - 324, 2003/11

https://jopss.jaea.go.jp/pdfdata/JAERI-Review-2003-033-p0188-p0390.pdf

no abstracts in English

Operation of the electrostatic accelerators at TIARA

Mizuhashi, Kiyoshi; Uno, Sadanori; Okoshi, Kiyonori; Chiba, Atsuya; Yamada, Keisuke; Saito, Yuichi; Ishii, Yasuyuki; Sato, Takahiro; Yokota, Wataru; Kitano, Toshihiko*; et al.

no journal, , 

no abstracts in English