期刊
PLASMA PHYSICS AND CONTROLLED FUSION
卷 63, 期 4, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1361-6587/abddf0
关键词
ECR plasma; fast electrons; electron distribution function measurement; quasilinear diffusion; ECR ion source
资金
- Russian Science Foundation [19-12-00377]
- Academy of Finland [315855]
- Russian Science Foundation [19-12-00377] Funding Source: Russian Science Foundation
- Academy of Finland (AKA) [315855, 315855] Funding Source: Academy of Finland (AKA)
Experiments on a minimum-B electron cyclotron resonance ion source revealed the presence of a hump in the energy distribution of escaped electrons at 150-300 keV, which is independent of microwave power but increases with magnetic field strength. The hump formation is likely related to radio-frequency-induced momentum space diffusion, confirmed when microwave power is applied.
The measurement of the axially lost electron energy distribution escaping from a minimum-B electron cyclotron resonance ion source in the range of 4-800 keV is reported. The experiments have revealed the existence of a hump at 150-300 keV energy, containing up to 15% of the lost electrons and carrying up to 30% of the measured energy losses. The mean energy of the hump is independent of the microwave power, frequency and neutral gas pressure but increases with the magnetic field strength, most importantly with the value of the minimum-B field. Experiments in pulsed operation mode have indicated the presence of the hump only when microwave power is applied, confirming that the origin of the hump is radio-frequency-induced momentum space diffusion. A possible mechanism of the hump formation is considered based on the quasi-linear model of plasma-wave interaction.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据