Error analysis of water flow calorimetry system of EAST neutral beam injector

Yu CHEN; Chundong HU; Yongjian XU; Ling YU; Xiang LI; Weitang ZHANG

doi:10.11889/j.0253-3219.2016.hjs.39.030602

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Error analysis of water flow calorimetry system of EAST neutral beam injector

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- Error analysis of water flow calorimetry system of EAST neutral beam injector
- NUCLEAR TECHNIQUES Vol. 39, Issue 3, Article number: 030602(2016)
- 作者机构：
  
  中国科学院等离子体物理研究所合肥 230031
  Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
- 作者简介：
- 基金信息：
- DOI：10.11889/j.0253-3219.2016.hjs.39.030602
  CLC： TL65+4;O551.1
- Received：09 September 2015，
  
  Accepted：2015-10-23，
  
  Published：25 March 2016
- 稿件说明：
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Yu CHEN, Chundong HU, Yongjian XU, et al. Error analysis of water flow calorimetry system of EAST neutral beam injector[J]. Nuclear techniques, 2016, 39(3): 030602
DOI：

Yu CHEN, Chundong HU, Yongjian XU, et al. Error analysis of water flow calorimetry system of EAST neutral beam injector[J]. Nuclear techniques, 2016, 39(3): 030602 DOI： 10.11889/j.0253-3219.2016.hjs.39.030602.

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 (ExperimentalAdvanced 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。

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 power is changed from 73.72% to 86.27% before and after correction.

Conclusion:

The accurate results lay a basis for the exact calculation of beam power deposition distribution and neutralization efficiency.

关键词

Keywords

references

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