A higher-order radial mode of m=0 helicon waves

被引：25
|
作者：
Sakawa, Y
Koshikawa, N
Shoji, T
机构：
[1] Department of Energy Engineering and Science, Nagoya University
[2] Tokyo Electric Power Co., Chiyoda-ku 100
来源：
PLASMA SOURCES SCIENCE & TECHNOLOGY | 1997年 / 6卷 / 01期
关键词：
D O I：
10.1088/0963-0252/6/1/014
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
The axial profile of the axial component of the wave magnetic field B-z has been measured for m = 0 helicon waves. A dip in B-z is observed at z similar or equal to 25 cm from the antenna, and is explained as a result of the beat between the fundamental and the second-order radial modes of the m = 0 helicon wave. The measured imaginary part of B-z, which consists only of the wave field, is compared with that of the calculated wave field using the theory of the uniform plasma case. It is found that similar or equal to 40% of the amplitude arises from the second-order mode and the axial damping length of the fundamental mode 1/k(iz1) similar or equal to 70 cm.
引用
收藏
页码：96 / 100
页数：5
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