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Analysis of neutron energy spectra from neutral beam heated plasmas in the JET tokamak

M Olsson, P van Belle, S Conroy, T Elevant, G Sadler1993年Plasma Physics and Controlled FusionIF 2.2出版社

Neutron energy spectra from deuterium neutral beam heated plasmas at the Joint European Torus (JET) have been measured with a time-of-flight spectrometer. The different source fractions, resulting from thermal-thermal (TT), beam-thermal (BT) and beam-beam (BB) interactions have been extracted. The measured TT fraction and associated ion temperature is checked for consistency with diagnostic data for electron density ne, effective charge Zeff, ion temperature Ti and total neutron emission. Two different ways of comparing the data are represented. Firstly, the measured TT fraction, total neutron emission, ne, Zeff and Te profile shape are used to deduce a consistent Ti, which is compared with Ti values obtained independently by other diagnostics. Secondly, the measured TT fraction, total neutron emission, ne profile shape and Ti are used to determine a consistent thermal deuterium density nD, which is compared with nD obtained from Zeff measurements.

日本語訳

中性子飛行時間型分光器を用いて、合同欧州トーラス(JET)における重水素中性粒子ビーム加熱プラズマからの中性子エネルギースペクトルを測定した。熱-熱(TT)、ビーム-熱(BT)、ビーム-ビーム(BB)相互作用に起因する異なるソース分率を抽出した。測定されたTT分率とそれに対応するイオン温度を、電子密度ne、実効電荷Zeff、イオン温度Ti、全中性子放出に関する診断データとの整合性について検証した。データの比較方法として2つのアプローチを示す。第一に、測定されたTT分率、全中性子放出、ne、Zeff、および電子温度Teのプロファイル形状を用いて整合的なTiを導出し、これを他の診断法で独立に得られたTi値と比較した。第二に、測定されたTT分率、全中性子放出、neのプロファイル形状、およびTiを用いて整合的な熱重水素密度nDを決定し、これをZeff測定から得られたnDと比較した。

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jet高精度(タイトル一致)

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JETNeutral beamNeutral beam injection
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