Charge‐exchange neutral particle measurement in MeV energy range on JT‐60U
Charge‐exchange neutral particle measurement in MeV energy range on JT‐60U
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JT-60U 上 MeV 能量范围内的电荷交换中性粒子测量
DOI：
10.1063/1.1146405
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
M. Petrov
中科院分区：
文献类型：
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作者：
Y. Kusama;M. Nemoto;M. Satoh;Y. Tsukahara;K. Tobita;H. Takeuchi;S. Petrov;V. Afanassiev;S. S. Kozlovskij;A. Kislyakov;M. Petrov
JT-60U 中已开发并安装了一种电荷交换中性粒子分析仪，用于测量核聚变或射频加热产生的 MeV 能量范围离子。进入分析仪的中性粒子被厚度为 400 A 的碳箔电离。剥离离子的能量和质量由磁场和静电场（E∥B 型）解析。该分析仪有八个 CsI(Tl) 闪烁体探测器。 4He0 的能量范围为 0.5–4 MeV，动态范围为 4.08，能量分辨率为 6%–11%。对于能量高于 1 MeV 的 4He0 的探测效率为 30%–40%。采用 16 通道脉冲高度分析 (PHA) 来区分粒子信号和 JT-60U 等离子体发出的中子、γ 射线和可见光产生的噪声。 PHA 的有效性在使用中子源的校准实验和 JT-60U 中的高功率加热实验中得到了证实。
A charge‐exchange neutral particle analyzer for the measurement of the MeV energy range ions produced by nuclear fusion or radio frequency heating has been developed and installed in JT‐60U. Neutral particles entering the analyzer are ionized with a carbon foil of thickness 400 A. The energy and mass of the stripped ions are resolved by magnetic and electrostatic fields (E∥B type). The analyzer has eight CsI(Tl) scintillator detectors. The energy range is 0.5–4 MeV for 4He0, the dynamic range is 4.08 and the energy resolution is 6%–11%. The detection efficiency for 4He0 with energy above 1 MeV is 30%–40%. A pulse height analysis (PHA) with 16 channels was adopted to distinguish particle signals from noise arising from neutrons, γ rays and optical lights emitted by JT‐60U plasmas. The validity of the PHA was confirmed in a calibration experiment using a neutron source and in a high power heating experiment in JT‐60U.