ECH in the microwave tokamak experiment

Conference · Tue Sep 01 04:00:00 EDT 1987 · AIP Conf. Proc.; (United States)

OSTI ID:7020784

Stallard, B W; Smith, G R; James, R A; Thomassen, K I; Kritz, A H; Makowski, M; Samec, T; Yamamoto, R

The Microwave Tokamak Experiment (MTX) at LLNL will investigate electron heating in the MTX tokamak (formerly Alcator-C) at high density (up to 6 x 10/sup 20/ m/sup -3/) and high power by using a free electron laser (FEL). Parameters of the FEL are a peak power up to 8 GW and 50 ns duration, with average power 1 to 2 MW, at a frequency of 250 GHz. The planned input driver for the FEL is a gyrotron oscillator. The FEL output will be transported quasi-optically, inside a 50 cm evacuated pipe, to the input port of the tokamak by means of a four-mirror system. Launch polarization is the ordinary mode. This experiment will test the FEL technology at short wavelength and high peak and average power levels. Important physics issues to be explored are the effects of intense pulse heating (electric field up to 500 kV/cm) on nonlinear wave absorption and bulk heating, plasma confinement, plasma impurities, and parametric instabilities. Because the FEL technology is scalable to higher frequency and power, success of these experiments has importance for next-generation tokamaks.

• Research Organization: Lawrence Livermore National Laboratory, University of California, Livermore, CA 94550
• OSTI ID: 7020784
• Report Number(s): CONF-870570-
• Conference Information: Journal Name: AIP Conf. Proc.; (United States) Journal Volume: 159:1
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
700108 -- Fusion Energy-- Plasma Research-- Wave Phenomena
BREAKDOWN
CLOSED PLASMA DEVICES
ELECTRIC FIELDS
ELECTROMAGNETIC RADIATION
ELECTRON TEMPERATURE
FREE ELECTRON LASERS
FREQUENCY RANGE
GHZ RANGE
GHZ RANGE 100-1000
HEATING
IMPURITIES
INSTABILITY
LASERS
LAWRENCE LIVERMORE LABORATORY
MICROWAVE RADIATION
NATIONAL ORGANIZATIONS
NONLINEAR PROBLEMS
PARAMETRIC INSTABILITIES
PLASMA
PLASMA DENSITY
PLASMA HEATING
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
POWER
RADIATIONS
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
US AEC
US DOE
US ERDA
US ORGANIZATIONS