| AVS 61st International Symposium & Exhibition | |
| Vacuum Technology | Wednesday Sessions |
| Session VT-WeM |
| Session: | Accelerator and Large Vacuum Systems I |
| Presenter: | Hiroshi Saeki, Japan Synchrotron Radiation Research Institute, Japan |
| Authors: | H. Saeki, Japan Synchrotron Radiation Research Institute, Japan T. Momose, Emeritus Professor of Miyagi National College of Technology, Japan |
| Correspondent: | Click to Email |
From 1980's to 2000's in Japan, electron storage rings had some key issues of their vacuum systems. To overcome two key issues especially, we observed dust trapping phenomena as a key issue, using lead-glass counters at first.1,2 Dust particles collected in beam ducts were analyzed 3 and simulation experiments to trap dust particles were carried out using these collected dust particles.2,4,5 As the results, the mechanism of the phenomena was found clearly and we knew how to prevent these phenomena occurring.6,7 We review and discuss the phenomena using published and unpublished data.
As the other key issue, it was that ionization gauges misread due to radiation-induced currents. 8 A hot-cathode-ionization gauge with correcting electrode was developed and tested in simulation experiments 9,10,11 and in actual radiation environments.12,13 The pressure-measurement error of the developed vacuum gauge was about 20%. We also review and discuss the vacuum gauge and other devices 14 to overcome other issues using latest data.
References
1Hiroshi Saeki, Takashi Momose, and Hajime Ishimaru, Rev. Sci. Instrum. 62(4), 874 (1991).
2Hiroshi Saeki, Takashi Momose, and Hajime Ishimaru, Rev. Sci. Instrum. 62(11), 2558 (1991).
3TAKASHI MOMOSE, HIROSHI SAEKI, and HAJIME ISHIMARU, VACUUM 43(3), 189 (1992).
4Hiroshi Saeki, Takashi Momose, and Hajime Ishimaru, Rev. Sci. Instrum. 62(11), 2568 (1991).
5Hiroshi Saeki, Takashi Momose, and Hajime Ishimaru, Rev. Sci. Instrum. 65(11), 3479 (1994).
6Hiroshi Saeki, Takashi Momose, and Hajime Ishimaru, Rev. Sci. Instrum. 67(4), 1475 (1996).
7Hiroshi Saeki, Takashi Momose, J. Vac. Sci. Technol. A 18(2), 492 (2000).
8Hiroshi saeki, Takashi Momose, J. Vac. Sci. Technol. A 18(1), 244 (2000).
9Hiroshi Saeki, Tamotsu Magome, and Tsuyoshi Aoki, Nobuaki Gotoh, Takashi Momose, Rev. Sci. Instrum. 75(12), 5152 (2004).
10Hiroshi Saeki, and Tamotsu Magome, Rev. Sci. Instrum. 79(5), 055102-1 (2008).
11Hiroshi Saeki, and Tamotsu Magome, J. Vac. Sci. Technol. A 29(6), 061601-1 (2011).
12Tamotsu Magome, and Hiroshi Saeki, J. Vac. Sci. Technol. A 23(4), 725 (2005).
13Hiroshi Saeki, and Tamotsu Magome, Yoshihiko Shoji, J. Vac. Sci. Technol. A 24(4), 1148 (2006).
14For example, Hiroshi Saeki, Hiroyasu Ego, Takahiro Watanabe, Katsuya Ishibashi, Takafumi Satoh, Kazuo Miyamoto, Vacuum 85(10), 975 (2011).