The C-2W experiment produces advanced beam-driven field reversed configuration (FRC) plasmas, which are sustained in steady state utilizing variable energy neutral beams (15–40 keV, total power up to 21 MW), advanced divertors, end bias electrodes, and an active plasma control system. Since heating, current drive, and refueling from neutral beam injection are essential to FRC sustainment, it is crucial to have accurate measurements of the beam power being injected into the plasma. A new tungsten wire calorimeter has been designed, built, calibrated on a test stand, and implemented to make the first direct measurements of the time-average injected beam power into C-2W. This paper outlines the design of the diagnostic, along with calibration methods and experimental results.

中文翻译：

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用于在 C-2W 上直接测量中性光束功率的线热量计

C-2W实验产生先进的束驱动场反转配置（FRC）等离子体，利用可变能量的中性束（15–40 keV，总功率高达21 MW），先进的分流器，末端偏置电极，和主动等离子体控制系统。由于中性束注入的加热、电流驱动和燃料补给对于 FRC 维持至关重要，因此准确测量注入等离子体的束功率至关重要。一个新的钨丝热量计已经被设计、建造、校准在测试台上，并被实施以对注入 C-2W 的时间平均光束功率进行首次直接测量。本文概述了诊断的设计，以及校准方法和实验结果。