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Fluctuation measurements by Langmuir probes during LHCD on ASDEX tokamak. [LHCD (Lower Hybrid Current Drive)]

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Abstract

The level of edge electrostatic fluctuations decreases and the global particle/energy confinement improves during lower hybrid current drive (LHCD) regimes on ASDEX, when the total power remains below the initial OH power level. For higher powers, the fluctuations increase noticeably, whereas the global confinement is returning to its OH value. The observed increase of fluctuations is poloidally asymmetric and is caused by local power deposition in front of the grill antenna. (author) 5 refs., 4 figs.
Authors:
Stoeckel, J; [1]  Soeldner, F; Giannone, L.; Leuterer, F [2] 
  1. Ceskoslovenska Akademie Ved, Prague (Czech Republic). Ustav Fyziky Plazmatu
  2. Max-Planck-Institut fuer Plasmaphysik, Garching (Germany)
Publication Date:
Jan 01, 1991
Product Type:
Conference
Report Number:
CONF-9106293-
Reference Number:
AIX-24-052323; EDB-93-095372
Resource Relation:
Journal Name: Europhysics Conference Abstracts; (Switzerland); Journal Volume: 15C:Part I; Conference: 18. European conference on controlled fusion and plasma heating, Berlin (Germany), 3-7 Jun 1991
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ASDEX TOKAMAK; FLUCTUATIONS; LANGMUIR PROBE; LOWER HYBRID CURRENT DRIVE; ANTENNAS; ASYMMETRY; CONFINEMENT; CONFINEMENT TIME; ELECTRIC FIELDS; ELECTRON DENSITY; ELECTRON TEMPERATURE; EXPERIMENTAL DATA; GHZ RANGE 01-100; POWER; SOFT X RADIATION; CLOSED PLASMA DEVICES; DATA; ELECTRIC PROBES; ELECTRICAL EQUIPMENT; ELECTROMAGNETIC RADIATION; EQUIPMENT; FREQUENCY RANGE; GHZ RANGE; INFORMATION; IONIZING RADIATIONS; NON-INDUCTIVE CURRENT DRIVE; NUMERICAL DATA; PROBES; RADIATIONS; THERMONUCLEAR DEVICES; TOKAMAK DEVICES; VARIATIONS; X RADIATION; 700340* - Plasma Waves, Oscillations, & Instabilities- (1992-); 700350 - Plasma Production, Heating, Current Drive, & Interactions- (1992-)
OSTI ID:
6423206
Country of Origin:
Switzerland
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 0378-2271; CODEN: ECABDW
Submitting Site:
CHN
Size:
Pages: I-249-I-252
Announcement Date:
May 13, 2001

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Citation Formats

Stoeckel, J, Soeldner, F, Giannone, L., and Leuterer, F. Fluctuation measurements by Langmuir probes during LHCD on ASDEX tokamak. [LHCD (Lower Hybrid Current Drive)]. Switzerland: N. p., 1991. Web.
Stoeckel, J, Soeldner, F, Giannone, L., & Leuterer, F. Fluctuation measurements by Langmuir probes during LHCD on ASDEX tokamak. [LHCD (Lower Hybrid Current Drive)]. Switzerland.
Stoeckel, J, Soeldner, F, Giannone, L., and Leuterer, F. 1991. "Fluctuation measurements by Langmuir probes during LHCD on ASDEX tokamak. [LHCD (Lower Hybrid Current Drive)]." Switzerland.
@misc{etde_6423206,
title = {Fluctuation measurements by Langmuir probes during LHCD on ASDEX tokamak. [LHCD (Lower Hybrid Current Drive)]}
 author = {Stoeckel, J, Soeldner, F, Giannone, L., and Leuterer, F}
 abstractNote = {The level of edge electrostatic fluctuations decreases and the global particle/energy confinement improves during lower hybrid current drive (LHCD) regimes on ASDEX, when the total power remains below the initial OH power level. For higher powers, the fluctuations increase noticeably, whereas the global confinement is returning to its OH value. The observed increase of fluctuations is poloidally asymmetric and is caused by local power deposition in front of the grill antenna. (author) 5 refs., 4 figs.}
 journal = []
 volume = {15C:Part I}
 place = {Switzerland}
 year = {1991}
 month = {Jan}
 }