Plasma and Fusion Research
Volume 10, 1402009 (2015)
Regular Articles
- Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
- 1)
- EcoTopia Science Institute, Nagoya University, Nagoya 464-8603, Japan
Abstract
The influence of deuterium retention on the electron-impact secondary electron emission (SEE) is studied in isotropic graphite (ETU-10). The ETU-10 surface sheath voltage and its deuterium retention under deuterium plasma exposure were measured simultaneously. Deuterium retention was estimated using in situ nuclear reaction analysis. While deuterium retention increased with decreasing graphite sample temperature, the sheath voltage on the sample surface decreased. The sheath potential variation is considered to be due to the SEE yield variation, which was estimated using the sheath voltage. The estimated SEE yield value increased by approximately 10% as the deuterium retention rose by a factor of two.
Keywords
graphite, deuterium retention, secondary electron emission, ion beam analysis
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References
- [1] R.A. Causey and K.L. Wilson, J. Nucl. Mater. 138, 57 (1986).
- [2] K. Morita, K. Ohtsuka and Y. Hasebe, J. Nucl. Mater. 162-164, 990 (1989).
- [3] B. Emmoth, H. Bergsaker and L. Ilyinsky, J. Nucl. Mater. 241-243, 1022 (1997).
- [4] A. Rusinov, N. Trifonov et al., J. Nucl. Mater. 417, 616 (2011).
- [5] K. Shiraishi et al., J. Plasma Fusion Res. 69, 1371 (1993).
- [6] K. Ohya, K. Nishimura et al., J. Nucl. Mater. 196-198, 699 (1992).
- [7] P.C. Stangeby, Physics of Plasma-Wall Interactions in Controlled Fusion ed. by D.E. Post and R. Behrisch, NATO ASI Series B: Physics Vol.131 (Plenum Press, New York, 1986) p.41.
- [8] M. Yamagiwa et al., Phys. Scr. T145, 014032 (2011).
- [9] K. Ohya, Nucl. Instrum. Methods B 153, 58 (1999).
- [10] M.E. Woods and B.J. Hopkins, J. Phys. D: Appl. Phys. 20, 1136 (1987).
- [11] J.M. Pedgley and G.M. McCracken, Plasma Phys. Control. Fusion 35, 397 (1993).
- [12] Y. Nakamura, M. Yamagiwa, T. Kaneko et al., J. Nucl. Mater. 438, S1036 (2013).
- [13] N. Ohno, Y. Nakamura, T. Kaneko et al., Physica Scripta 159, 014053 (2014).
This paper may be cited as follows:
Tatsuya KANEKO, Noriyasu OHNO, Yuki NAKAMURA, Masato YAMAGIWA, Noriaki MATSUNAMI, Shin KAJITA and Makoto TAKAGI, Plasma Fusion Res. 10, 1402009 (2015).