Klepper C C, Hillis D L, Bucalossi J, Douai D, Oddon P, Vartanian S, Colas L, Manenc L, Pégourié B
Fusion Energy Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6169, USA.
Rev Sci Instrum. 2010 Oct;81(10):10E104. doi: 10.1063/1.3474660.
A shielded residual gas analyzer (RGA) system on Tore Supra can function during plasma operation and is set up to monitor the composition of the neutral gas in one of the pumping ducts of the toroidal pumped limited. This "diagnostic RGA" has been used in long-pulse (up to 6 min) discharges for continuous monitoring of up to 15 masses simultaneously. Comparison of the RGA-measured evolution of the H(2)/D(2) isotopic ratio in the exhaust gas to that measured by an energetic neutral particle analyzer in the plasma core provides a way to monitor the evolution of particle balance. RGA monitoring of corrective H(2) injection to maintain proper minority heating is providing a database for improved ion cyclotron resonance heating, potentially with RGA-base feedback control. In very long pulses (>4 min) absence of significant changes in the RGA-monitored, hydrocarbon particle pressures is an indication of proper operation of the actively cooled, carbon-based plasma facing components. Also H(2) could increase due to thermodesorption of overheated plasma facing components.
托雷·苏普拉（Tore Supra）上的一个屏蔽式残余气体分析仪（RGA）系统可在等离子体运行期间运行，并设置用于监测环形泵浦限制器的一个抽气管道中的中性气体成分。这个“诊断RGA”已用于长脉冲（长达6分钟）放电，可同时连续监测多达15种质量数的气体。将RGA测量的废气中H(2)/D(2)同位素比的变化与等离子体芯中高能中性粒子分析仪测量的结果进行比较，提供了一种监测粒子平衡变化的方法。RGA对用于维持适当少数离子加热的校正H(2)注入的监测，正在为改进离子回旋共振加热提供一个数据库，可能采用基于RGA的反馈控制。在非常长的脉冲（>4分钟）中，RGA监测到的碳氢化合物粒子压力没有显著变化，这表明主动冷却的碳基面向等离子体部件运行正常。此外，由于过热的面向等离子体部件的热脱附，H(2)可能会增加。
