east中性束注入器水流热量累积测量系统误差分析 error analysis of water flow calorimetry system of east neutral beam injector.pdfVIP

第39 卷 第3 期 核 技 术 Vol.39, No.3 2016 年3 月 NUCLEAR TECHNIQUES March 2016 EAST 中性束注入器水流热量累积 测量系统误差分析 陈 宇 胡纯栋 许永建 于 玲 栗 翔 张为堂 （中国科学院等离子体物理研究所 合肥 230031 ） 摘要 水流量热法是强流离子束束功率测量常用的方法，由于测量仪表安装位置的问题，EAST (Experimental Advanced Superconducting Tokamak)全超导托卡马克中性束注入水流热量累积测量系统中存在不可忽略的误 差。本文结合水流热量累计测量系统的原理分析其误差的来源，针对其中由于采集时间有限和真空室内外热传 递损失三部分误差来源进行了详细的分析和修正，将沉积功率百分比由73.72%提高到86.27%，修正结果显著。 最终将修正方法嵌入到现有的沉积功率计算系统中，实时地进行误差修正，从而得到更精确的沉积在热承载部 件上的功率沉积，为功率沉积分布和中性化效率的精确测量提供依据。 关键词 中性束注入器，水流热量累积测量系统，误差修正 中图分类号 TL65+4 ，O551.1 DOI: 10.11889/j.0253-3219.2016.hjs.39.030602 Error analysis of water flow calorimetry system of EAST neutral beam injector CHEN Yu HU Chundong XU Yongjian YU Ling LI Xiang ZHANG Weitang (Institute of Plasma Physics , Chinese Academy of Sciences, Hefei 230031, China) Abstract Background: Water flow calorimetry is often used to measure the beam power of high intensity ion beam. There are some inevitable errors in water flow calorimetry system of Experimental Advanced Superconducting Tokamak (EAST) neutral beam injector, due to the position of the measuring instrument and acquisition time. Purpose: This study aims to correct these errors. Methods: This paper analyzes the factors inducing errors of the water flow calorimetry system, and then carries out quantitative calculation method for main error factors, and finally embeds the result into an existing data processing system. Results: Take the shot 58003 as an example, the deposition