Design and calibration of the JET time of flight neutral particle analyzer with high noise rejection capability
Design and calibration of the JET time of flight neutral particle analyzer with high noise rejection capability
复制标题
高噪声抑制JET飞行时间中性粒子分析仪的设计与标定
DOI：
10.1063/1.1143350
复制
发表时间：
1992
影响因子：
1.6
通讯作者：
V. Zanza
中科院分区：
文献类型：
--
作者：
G. Bracco;G. Betello;S. Mantovani;A. Moleti;B. Tilia;V. Zanza
本文介绍了用于欧洲联合环（JET）托卡马克的飞行时间中性粒子分析器的设计和校准，以诊断接近热核聚变条件的等离子体。分析仪的15个通道可以选择能量范围从0.5到250 keV的电荷交换中性粒子的能量和质量。该分析仪已校准氢，氘，氦原子。利用符合技术测量被检测到的中性粒子的飞行时间也允许从随机背景中辨别粒子信号。因此，NPA在存在高中子和伽马通量的情况下成功运行，这是大型托卡马克中产生的高性能聚变等离子体的特征。详细报告了校准数据处理、信号分析和信噪比评估。
This paper describes the design and calibration of a time‐of‐flight neutral particle analyzer used on the Joint European Torus (JET) tokamak in the diagnostics of plasma close to thermonuclear fusion conditions. The 15 channels of the analyzer can select energy and mass of charge exchange neutrals in the energy range from 0.5 to 250 keV. The analyzer has been calibrated for hydrogen, deuterium, and helium atoms. The utilization of the coincidence technique in the measurement of the time of flight of the detected neutrals also permits discrimination of the particle signal from a random background. Thus, the NPA operates successfully in the presence of the high neutron and gamma fluxes that are characteristic of the high‐performance fusion plasmas produced in large tokamaks. The calibration data processing, the signal analysis, and the signal‐to‐noise evaluation are reported in detail.