A HIGHER-ORDER RADIAL MODE OF M=0 HELICON WAVES

Authors
SAKAWA Y KOSHIKAWA N SHOJI T
Citation
Y. Sakawa et al., A HIGHER-ORDER RADIAL MODE OF M=0 HELICON WAVES, Plasma sources science & technology, 6(1), 1997, pp. 96-100
Citations number
10
Categorie Soggetti
Phsycs, Fluid & Plasmas
Journal title
Plasma sources science & technology → ACNP
ISSN journal
09630252
Volume
6
Issue
1
Year of publication
1997
Pages
96 - 100
Database
ISI
SICI code
0963-0252(1997)6:1<96:AHRMOM>2.0.ZU;2-E
Abstract
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 radia l 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 c alculated wave field using the theory of the uniform plasma case. It i s 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.