X-ray analysis of nonMaxwellian distributions (current drive)

Conference · Wed Jun 01 04:00:00 EDT 1983

OSTI ID:5956545

von Goeler, S; Stevens, J; Stodiek, W

The plasma bremsstrahlung emission is utilized to determine the shape of the electron velocity distribution in situations where it deviates strongly from a Maxwellian distribution. The instrumentation used to measure the hard x-ray emission is briefly discussed. Model calculations show that polarization measurements give best results for unrelativistic tails with tail temperatures T/sub b/ < 50 keV, whereas measurements of the angular distribution of the x-ray emission based on the forward scattering of bremsstrahlung for relativistic electrons yields the best information for T/sub b/ > 50 keV. The techniques were originally developed in order to analyze runaway discharges. Recently, they found new interest because of the formation of energetic electron tails during current drive. The first x-ray results from the current drive during LH heating on PLT are discussed.

• Research Organization: Princeton Univ., NJ (USA). Plasma Physics Lab.
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 5956545
• Report Number(s): PPPL-2010; CONF-820944-9; ON: DE83013722
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700104* -- Fusion Energy-- Plasma Research-- Plasma Kinetics-Experimental-- (-1987)
BOLTZMANN STATISTICS
BREMSSTRAHLUNG
CURRENT-DRIVE HEATING
DISTRIBUTION FUNCTIONS
ELECTRIC HEATING
ELECTROMAGNETIC RADIATION
ELECTRON DENSITY
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
FUNCTIONS
HEATING
JOULE HEATING
LEPTONS
PLASMA
PLASMA HEATING
PLT DEVICES
RADIATIONS
RESISTANCE HEATING
RUNAWAY ELECTRONS
SPECTRA
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS
X-RAY SPECTRA