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An experimental study of the harmonics generated during Alfven wave heating in TCA

Technical Report:

Abstract

During plasma excitation by high power Alfven waves in TCA, signals at harmonics of the generator frequency are observed in the plasma scrape-off layer. In this paper we report experimental investigations of the sheath effect and the excitation efficiency and dispersion properties of these harmonics. The results indicate that the harmonics arise either directly or indirectly through the driven Alfven waves and not the sheath effect at the exciting antenna. The RF ion saturation current is observed a non-negligible peak amplitude in comparison to the time averaged ion saturation current and may provide evidence of non-linear evolution of the driven Alfven waves. (author) 8 figs., 8 refs.
Authors:
Borg, G C; Lister, J B; Dalla Piazza, S; Martin, Y [1] 
  1. Ecole Polytechnique Federale, Lausanne (Switzerland). Centre de Recherche en Physique des Plasma (CRPP)
Publication Date:
Jun 01, 1993
Product Type:
Technical Report
Report Number:
LRP-477/93
Reference Number:
SCA: 700340; 700350; PA: AIX-25:007871; EDB-94:016655; ERA-19:007828; NTS-94:015332; SN: 94001127213
Resource Relation:
Other Information: PBD: Jun 1993
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; PLASMA HEATING; ALFVEN WAVES; TCA TOKAMAK; HARMONICS; AMPLITUDES; ANTENNAS; DISPERSION RELATIONS; EFFICIENCY; EXCITATION; EXPERIMENTAL DATA; HARMONIC GENERATION; PLASMA SCRAPE-OFF LAYER; PLASMA SHEATH; SATURATION; SIGNALS; 700340; 700350; PLASMA WAVES, OSCILLATIONS, AND INSTABILITIES; PLASMA PRODUCTION, HEATING, CURRENT DRIVE, AND INTERACTIONS
OSTI ID:
10113880
Research Organizations:
Ecole Polytechnique Federale, Lausanne (Switzerland). Centre de Recherche en Physique des Plasma (CRPP)
Country of Origin:
Switzerland
Language:
English
Other Identifying Numbers:
Other: ON: DE94611467; TRN: CH9300595007871
Availability:
OSTI; NTIS; INIS
Submitting Site:
CHN
Size:
20 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Borg, G C, Lister, J B, Dalla Piazza, S, and Martin, Y. An experimental study of the harmonics generated during Alfven wave heating in TCA. Switzerland: N. p., 1993. Web.
Borg, G C, Lister, J B, Dalla Piazza, S, & Martin, Y. An experimental study of the harmonics generated during Alfven wave heating in TCA. Switzerland.
Borg, G C, Lister, J B, Dalla Piazza, S, and Martin, Y. 1993. "An experimental study of the harmonics generated during Alfven wave heating in TCA." Switzerland.
@misc{etde_10113880,
title = {An experimental study of the harmonics generated during Alfven wave heating in TCA}
author = {Borg, G C, Lister, J B, Dalla Piazza, S, and Martin, Y}
abstractNote = {During plasma excitation by high power Alfven waves in TCA, signals at harmonics of the generator frequency are observed in the plasma scrape-off layer. In this paper we report experimental investigations of the sheath effect and the excitation efficiency and dispersion properties of these harmonics. The results indicate that the harmonics arise either directly or indirectly through the driven Alfven waves and not the sheath effect at the exciting antenna. The RF ion saturation current is observed a non-negligible peak amplitude in comparison to the time averaged ion saturation current and may provide evidence of non-linear evolution of the driven Alfven waves. (author) 8 figs., 8 refs.}
place = {Switzerland}
year = {1993}
month = {Jun}
}