Time integrated x-ray measurments of the very energetic electron end loss profile in TMX-U

Conference · Fri Sep 14 00:00:00 EDT 1984

OSTI ID:6332333

Osher, J E; Fabyan, J

The time-integrated 2-D profile of the thick-target bremsstrahlung produced by energetic end loss electrons has been measured during ECRH operation of TMX-U. Sheets of x-ray film and/or arrays of thermoluminescent dosimeters were placed on the outside of the end tank end wall to measure the relative spatial x-ray profile, with locally added filters of Pb to determine the effective mean x-ray energy. The purpose of this simple survey diagnostic was to allow deduction of the gross features of the ECRH region. The electron source functions needed to fit the x-ray data were modeled for various anchor cell radial distributions mapped along magnetic field lines to the elliptical plasma potential control plates or the Al end walls. The data are generally consistent with (1) major ECR heating in the central 25-cm-diam core, (2) a mean ECRH electron loss energy of 420 keV, and (3) an ECRH coupling efficiency to these hot electrons of greater than or equal to 10%.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6332333
• Report Number(s): UCRL-91507; CONF-840922-10; ON: DE85001567
• Resource Relation: Conference: 5. APS topical conference on high temperature plasma diagnostics, Tahoe City, CA, USA, 16 Sep 1984; Other Information: Portions are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
TMX DEVICES
ENERGY LOSSES
X-RAY SPECTRA
ECR HEATING
ELECTRONS
TWO-DIMENSIONAL CALCULATIONS
ELEMENTARY PARTICLES
FERMIONS
HEATING
HIGH-FREQUENCY HEATING
LEPTONS
LOSSES
MAGNETIC MIRRORS
OPEN PLASMA DEVICES
PLASMA HEATING
SPECTRA
TANDEM MIRRORS
THERMONUCLEAR DEVICES
700104* - Fusion Energy- Plasma Research- Plasma Kinetics-Experimental- (-1987)