Plasma and Fusion Research
Volume 2, S1108 (2007)
Regular Articles
- Graduate School of Frontier Science, the University of Tokyo, Tokyo 113-8656, Japan
- 1)
- High Temperature Plasma Center, the University of Tokyo, Tokyo 113-8656, Japan
- 2)
- National Institute for Fusion Science, Toki 509-5292, Japan
Abstract
A new two-dimensional Thomson scattering measurement (2-D TS) system has been developed using multiple reflections and time-of-flight (TOF) of laser light. Its new ideas of our 2-D TS system are (1) to reflect YAG laser light for multiple times to cover the whole r - z plane of the ST (Spherical Tokamak) plasma, and (2) to reduce the number of polychromators and detectors using the time delay of the scattered light along the laser beam. We measured for the first time, Rayleigh scattering light signals with 50 ns time difference from two measurement points using a single detector, demonstrating the basic principle of the 2-D Thomson scattering system.
Keywords
Thomson scattering, two-dimensional measurement, Rayleigh scattering, Raman scattering
Full Text
References
- [1] N.J. Peacock, D.C. Robinson, M.J. Forrest, P.D. Wilcock and V.V. Sannikov, Nature 224, 488 (1969).
- [2] K. Narihara, I. Yamada, H. Hayashi and K. Ymauchi, Rev. Sci. Instrum. 72, 1122 (2001).
- [3] H. Yoshida, O. Naito, O. Yamashita, S. Kitamura, T. Sakuma, Y. Onose, H. Nemoto, T. Hamano, T. Hatae, A. Nagashima and T. Matoba, Rev. Sci. Instrum. 70, 751 (1999).
- [4] D. Johnson, D. Dimock, B. Grek, D. Long, D. McNeill, R. Palladino, J. Robinson and E. Tolnas, Rev. Sci. Instrum. 56, 1015 (1985).
- [5] H. Salzmann, K. Hirsch, P. Nielsen, C. Gowers, A. Gadd, H. Gadeberg, H. Murmann and A. Schrodter, Nucl. Fusion 27, 1925 (1978).
- [6] M.P. Alonso, P.D. Wilcock and C.A.F. Varandas, Rev. Sci. Instrum. 70, 783 (1999).
- [7] B. Kurzan, H.D. Murmann and J. Neuhauser, Phys. Rev. Lett. 95, 145001 (2005).
- [8] H.J. van der Meiden, C.J. Barth, T. Oyevaar, S.K. Varshney and A.J.H. Donné, Rev. Sci. Instrum. 75, 3849 (2004).
- [9] T. HATAE, M. Nakatsuka, H. Yoshida, J. Plasma Fusion Res. 80, 879 (2004).
- [10] I. Yamada, K. Narihara, H. Hayashi, Rev. Sci. Instrum. 74, 1675 (2003).
This paper may be cited as follows:
Takashi SUMIKAWA, Kouhei YAMASHITA, Eiichirou KAWAMORI, Kazumichi NARIHARA and Yasushi ONO, Plasma Fusion Res. 2, S1108 (2007).