DNB引出束流功率及剖面分布测量

 利用束流截止板热量计原理，测量了诊断中性束(DNB)注入托卡马克的束流功率及束流剖面分布。基于热量截止板上正交分布的13只K型热电偶探针测量出DNB引出束流，在加速极电源49 kV，6 A，100 ms的脉冲放电时，采样铜靶上的最高温升为14 ℃，从而计算出注入束流功率达到160 kW并得到束剖面分布。同时通过对热量截止板冷却循环水温升测量值在时间上的积分数值计算，也获得了注入束流总功率，为130 kW。分析了两种测量结果存在差异的原因，实验结果表明惯性束截止板热量计方法是测量粒子束流功率及剖面分布的有效手段。

Measurement of neutral beam power and beam profile distribution on DNB

The injection power of a diagnostic neutral beam(DNB) can be obtained with the thermocouple probe measurementsystem on the Hefei superconducting Tokamak-7(HT-7).With the 49kV,6A,100ms pulse charge of an accelerationelectrode, a thermocouple probe measurement system with 13 thermocouples crossly distributed on a coppery heat target was used to measure the temperature rise of the target,and the maximum measured temperature rise was 14 ℃.And the neutral beam power of 160 kW and beam profile distribution were obtained by calculation.The total neutral beam power of 130 kW was also obtained by integral calculation with the temperature rise on the heat section board.The difference between the two means was analyzed.The experiment result shows that the method of heat section board with thermocouple probe is one of the effective ways to measure the beam power and beam profile distribution.