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Methods for the estimate of the magnetic axis, the last closed flux surface and the differential shift in an RFP plasma

A. Boboc, P. Franz, A. Murari, L. Giudicotti, E. Zilli, P. Zanca, M. O'Gorman, S. Prunty2002年被引用 1Nuclear FusionIF 3出版社

We present a preliminary investigation of the plasma column displacement in the RFX reversed field pinch (RFP) experiment, carried out with different diagnostics. Determinations of the plasma position have been obtained by a set of external pick-up coils, a multichannel far infrared (FIR) polarimeter and a soft x-ray (SXR) tomographic camera. These diagnostics provide complementary information about the plasma position. In particular, the location of the polarimetric chords allows a direct estimate of the horizontal magnetic axis shift. The analysis of the isoemissivity SXR surfaces also allow investigations of the differential shift of the various magnetic surfaces. A comparison of the results of these three diagnostics is reported, and their agreement is found to be satisfactory and consistent with our expectations.

日本語訳

我々は、RFX反転磁場ピンチ(RFP)実験におけるプラズマ柱変位の予備的調査を、異なる診断装置を用いて実施した結果を提示する。プラズマ位置の決定は、外部ピックアップコイル群、多チャンネル遠赤外線(FIR)偏光計、および軟X線(SXR)トモグラフィーカメラによって得られた。これらの診断装置は、プラズマ位置に関する相補的な情報を提供する。特に、偏光計測チャンネルの配置により、水平方向の磁気軸シフトの直接的な推定が可能となる。SXR等発光面の解析により、様々な磁気面の差動シフトの調査も可能となる。これら3つの診断装置の結果の比較を報告し、それらの一致は満足のいくものであり、我々の期待と整合的であることが判明した。

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Reversed field pinch
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