Density profile measurement with a heavy ion beam probe in a toroidal plasma of the compact helical system

A. Shimizu, A. Fujisawa, S. Ohshima, H. Nakano, T. Minami, M. Isobe, S. Okamura, K. Matsuoka

研究成果: Contribution to journalArticle査読

4 被引用数 (Scopus)

抄録

A possibility of electron density measurements with heavy ion beam probes (HIBPs) has been demonstrated, along with their capability to measure the potential and magnetic field. A method has been proposed to reconstruct the electron density profile [A. Fujisawa et al., Rev. Sci. Instrum. 74, 3335 (2003)]. In the method, the profile of secondary beam currents is converted into a local density profile by taking into account local brightness and so-called path integral effects which mean the effect of beam attenuation along the beam orbit. Here the article presents the HIBP measurement of the electron density profile after the proposed method was first applied on the real experimental data of compact helical system plasmas. In the real application, the hollow density and the peaked profiles are successfully obtained with sufficiently high temporal resolution (a few ms), in accordance with the electron density profile measured with Thomson scattering for electron cyclotron resonance heating and neutral beam injection plasmas.

本文言語英語
論文番号113507
ジャーナルReview of Scientific Instruments
89
11
DOI
出版ステータス出版済み - 11 1 2018

All Science Journal Classification (ASJC) codes

  • 器械工学

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