Plasma and Fusion Research

Volume 6, 2402036 (2011)

Regular Articles

Evaluation of Edge Electron Temperature Fluctuation by the Use of Fast Voltage Scanning Method on TST-2
Yoshihiko NAGASHIMA, Akira EJIRI, Yuichi TAKASE, Masateru SONEHARA, Hidetoshi KAKUDA, Takuya OOSAKO1), Junichi HIRATSUKA, Osamu WATANABE, Takashi YAMAGUCHI, Hiroaki KOBAYASHI, Takuma WAKATSUKI, Takuya SAKAMOTO, Kentaro HANASHIMA, Takanori AMBO, Ryota SHINO and Shigeru INAGAKI2)
The University of Tokyo, Chiba 277-8561, Japan
1)
CEA, Saint Paul Lez Durance 13108, France
2)
Kyushu University, Kasuga 816-8580, Japan
(Received 5 December 2010 / Accepted 2 February 2011 / Published 1 July 2011)

Abstract

Edge electron temperature fluctuation is evaluated by the use of fast voltage sweeping technique on TST-2. The validity of obtained current-voltage characteristic curve was checked by comparing the time evolutions of floating potential between that obtained from the fast voltage sweeping technique and that measured with floating probe method. Good agreement between them was confirmed. We also found that fitting errors in the evaluation of the electron temperature itself are less than 10% of fluctuation levels of the electron temperature. Therefore the accuracy of the technique is applicable to study of plasma fluctuations.

Keywords

plasma turbulence, temperature fluctuation, edge plasma

DOI: 10.1585/pfr.6.2402036

Full Text

PDF format (2.2Mbytes) PDF Download

References

  • [1] C. Hidalgo, R. Balbín, M. Pedrosa, I. García-Cortés and M. Ochando, Phys. Rev. Lett. 69, 1205 (1992).
  • [2] L. Giannone, R. Balbfn, H. Niedermeyer, M. Endler, G. Herre, C. Hidalgo, A. Rudyj, G. Theimer, P. Verplanke and the W7-AS Team, Phys. Plasmas 1, 3614 (1994).
  • [3] M. Meier, R. Bengtson, G. Hallock and A. Wooton, Phys. Rev. Lett. 87, 085003 (2001).
  • [4] M. Schubert, M. Endler, H. Thomsen and T. W.-A. Team, Rev. Sci. Instrum. 78, 053505 (2007).
  • [5] H. Müller, J. Adamek, J. Horacek, C. Ionita, F. Mehlmann, V. Rohde, R. Schrittwieser and the ASDEX Upgrade Team, Contrib. Plasma Phys. 50, 847 (2010).
  • [6] J. Boedo, D. Gray, R.W. Conn, P. Luong, M. Schaffer, R. Ivanov, A. Chernilevsky, G.V. Oost and T.T. Team, Rev. Sci. Instrum. 70, 2997 (1999).
  • [7] J. Boedo, D. Rudakov, R. Moyer, G. McKee, R. Colchin et al., Phys. Plasmas 10, 1670 (2003).
  • [8] Y. Takase, A. Ejiri, N. Kasuya, T. Mashiko, S. Shiraiwa et al., Nucl. Fusion 41, 1543 (2001).
  • [9] T. Oosako, Y. Takase, A. Ejiri, Y. Nagashima, Y. Adachi et al., Nucl. Fusion 49, 065020 (2009).
  • [10] Y. Nagashima, T. Oosako, Y. Takase, A. Ejiri, O. Watanabe et al., Phys. Rev. Lett. 104, 045002 (2010).
  • [11] A. Ejiri, Y. Takase, T. Oosako, T. Yamaguchi, Y. Adachi et al., Nucl. Fusion 49, 065010 (2009).
  • [12] K. Yamada, Master's thesis (2009).

This paper may be cited as follows:

Yoshihiko NAGASHIMA, Akira EJIRI, Yuichi TAKASE, Masateru SONEHARA, Hidetoshi KAKUDA, Takuya OOSAKO, Junichi HIRATSUKA, Osamu WATANABE, Takashi YAMAGUCHI, Hiroaki KOBAYASHI, Takuma WAKATSUKI, Takuya SAKAMOTO, Kentaro HANASHIMA, Takanori AMBO, Ryota SHINO and Shigeru INAGAKI, Plasma Fusion Res. 6, 2402036 (2011).