Published May 1986 | Version v1
Report Metadata-only

Influence of the N-spectrum on lower hybrid current drive in ASDEX

Creators

  • 1. Association Euratom-Max-Planck-Institut fuer Plasmaphysik, Garching (Germany, F.R.)
  • 2. AN SSSR, Leningrad
  • 3. Commission of the European Communities, Abingdon (UK). JET Joint Undertaking
  • 4. ENEA, Frascati (Italy)
  • 5. Seattle Univ., WA (USA)
  • 6. CEA Centre d'Etudes Nucleaires de Grenoble, 38 (France)

Description

The lower hybrid current drive experiments in ASDEX so far have been performed mainly by operating successive waveguides of the grill at a relative phase of Δφ=π/2 and with equal amplitudes. The spectrum thus excited is considered in this paper as a reference spectrum. With such a spectrum it has been observed that the primary current rate of change, -dI/dtOH, necessary to maintain a constant plasma current Ip, decreased with increasing rf-power, PRF. In this paper we describe experiments with 'tailored' spectra where phase and amplitude in each waveguide are specifically set to produce a N'-spectrum with a definite wing at the high N'-side. (orig./GG)

Additional details

Publishing Information

Imprint Title
ASDEX papers at the 13th European conference on controlled fusion and plasma physics
Imprint Pagination
149 p.
Journal Page Range
p. 101-104.
Report number
IPP--III/110

Conference

Title
13. European conference on controlled fusion and plasma heating.
Dates
14-18 Apr 1986.
Place
Schliersee (Germany, F.R.).

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
18011169
Subject category
S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
Resource subtype / Literary indicator
Conference
Descriptors DEI
ASDEX TOKAMAK; CURRENT-DRIVE HEATING; LOWER HYBRID HEATING; MICROWAVE SPECTRA
Descriptors DEC
CLOSED PLASMA DEVICES; HEATING; HIGH-FREQUENCY HEATING; PLASMA HEATING; SPECTRA; THERMONUCLEAR DEVICES; TOKAMAK DEVICES