Gupta D, Bolte N, Gota H, Hayashi R, Kiyashko V, Marsili P, Morehouse M, Primavera S, Roche T, Wessel F
Tri Alpha Energy, Inc., Rancho Santa Margarita, California 92688, USA.
Rev Sci Instrum. 2010 Oct;81(10):10D730. doi: 10.1063/1.3485090.
One aim of the flux-coil generated field reversed configuration at Tri Alpha Energy (TAE) is to establish the plasma where the ion rotational energy is greater than the ion thermal energy. To verify this, an optical diagnostic was developed to simultaneously measure the Doppler velocity-shift and line-broadening using a 0.75 m, 1800 groves/mm, spectrometer. The output spectrum is magnified and imaged onto a 16-channel photomultiplier tube (PMT) array. The individual PMT outputs are coupled to high-gain, high-frequency, transimpedance amplifiers, providing fast-time response. The Doppler spectroscopy measurements, along with a survey spectrometer and photodiode-light detector, form a suite of diagnostics that provide insights into the time evolution of the plasma-ion distribution and current when accelerated by an azimuthal-electric field.
在Tri Alpha能源公司（TAE），通量线圈产生的场反向配置的一个目标是建立离子旋转能量大于离子热能的等离子体。为了验证这一点，开发了一种光学诊断方法，使用一台0.75米、每毫米1800条刻线的光谱仪同时测量多普勒速度偏移和线展宽。输出光谱被放大并成像到一个16通道光电倍增管（PMT）阵列上。各个PMT输出连接到高增益、高频、跨阻放大器，提供快速时间响应。多普勒光谱测量，连同一台测量光谱仪和光电二极管光探测器，构成了一套诊断方法，可深入了解等离子体离子分布和电流在方位电场加速时的时间演化。
