Measurements of edge-localized-mode induced electron cyclotron emission bursts in DIII-D
Measurements of edge-localized-mode induced electron cyclotron emission bursts in DIII-D
复制标题
DIII-D 中边缘局域模式感应电子回旋发射爆发的测量
DOI：
10.1063/1.1362527
复制
发表时间：
2001
影响因子：
2.2
通讯作者：
M. Austin
中科院分区：
文献类型：
--
作者：
C. Fuchs;M. Austin
在DIII-D托卡马克的H模(高约束)放电中观察到了强烈的非热电子回旋发射[J.L.Luxon和L.G.Davis，Fusion Technol]。8441(1985)]，用外差辐射计和宽带远红外探测器测量。这些爆发是由边缘局域模式(ELM)触发的，由单个或几个尖峰组成，大多数持续5-150MeV的S。辐射温度高达几μ。观测到的光谱带宽通常小于4 GHz。带宽低至500 MHz，这是仪器滤波器间距的极限。统计分析表明，随着尖峰能量的增加，尖峰的数量稳步减少。爆发频率似乎与磁场成线性关系。据推测，这些爆发是相干的二次谐波。
Intense bursts of nonthermal electron cyclotron emission (ECE) have been observed in H-mode (high confinement) discharges in the DIII-D tokamak [J. L. Luxon and L. G. Davis, Fusion Technol. 8, 441 (1985)], measured with heterodyne radiometers and a broadband far infrared (FIR) detector. These bursts are triggered by edge-localized modes (ELMs) and consist of single or several spikes, most lasting 5–150 μs. Radiation temperatures reach up to several MeV. Observed spectral bandwidths are typically less than 4 GHz. Bandwidths as low as 500 MHz, which is the limit of the instrumental filter spacing, have been found. Statistical analysis shows a steady decrease of the number of spikes with rising spike energy. Burst frequencies seem to depend linearly on the magnetic field. It is speculated that the bursts are coherent second harmonic ECE.