Characterization of plasma current quench during disruption in EAST tokamak

• 作者: Xiao Bing-Jia 杨飞 沈飙 肖炳甲 钱金平 陈大龙
• 来源期刊: 中国物理B（英文版）
• 关键词: EAST linear fit area-normalized quench time eddy current
• 年，卷（期）: 2015,（2）
• 页码范围: 025205-1-025205-5
• 页数: 1页
• 语种: 英文
• DOI: 10.1088/1674-1056/24/2/025205

摘要

Preliminary analysis of plasma current quench is presented in this paper based on the disruption database. It demon-strates that 26.8%discharges have disrupted in the last 2012 campaign, in addition, plasma disruptive rate grows with the increase of plasma current. Best-fit linear and instantaneous plasma current quench rate is extracted from the recent EAST disruptions, showing that 80%–30%interval of the maximum plasma current is well fit for EAST device. The lowest area-normalized current quench time is 3.33 ms/m2 with the estimated plasma electron temperature being 7.3 eV～9.5 eV. In the disruption case the maximum eddy current goes up to 400 kA, and a fraction of currents are respectively driven on upper and lower outer plate with nearly 100 MPa–200 MPa stress in the leg.