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(PD/P-02) First Results with Dual Heavy Ion Beam Probe Systems on Low Density Discharges in CHS Plasma

A. Fujisawa¹⁾, A. Shimizu¹⁾, M. Kitazawa¹⁾, H. Iguchi¹⁾, M. Kojima¹⁾, T. Minami¹⁾, Y. Yoshimura¹⁾, S. Nishimura¹⁾, M. Isobe¹⁾, C. Suzuki¹⁾, K. Nagaoka¹⁾, K. Ida¹⁾, S. Okamura¹⁾, K. Matsuoka¹⁾, C. Takahashi¹⁾, K. Toi¹⁾, H. Sanuki¹⁾, K. Itoh¹⁾, Y. Hamada¹⁾, M. Fujiwara^1)
 
1) National Institute for Fusion Science, Japan

Abstract.  Installation of the second heavy ion beam probe has been completed in Compact Helical System (CHS) stellarators. In a low density plasma, simultaneous measurements of dual HIBP systems have been applied and have just obtained new results related with two interesting phenomena; electric pulsation and high frequency coherent mode supposed to be an Alfven eigen mode. The paper presents the results of spatio-temporal evolution in electric pulsation and correlation between HIBP signals in high frequency modes.

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