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  • POLARIZATION AND SPECTRAL FEATURES OF THE HARD X-RAY CONTINUUM FROM NON-THERMAL PLASMAS PART 1: EXPECTED LOCAL AND LINE-INTEGRATED QUANTITIES FOR LHCD-EXPERIMENTS ON TORE-SUPRA

Abstract

Starting from the cross-sections for the free-free radiation obtained within the relativistic Born-Elwert theory, the spectral and polarisation properties of the hard X-ray continuum (energy above 50 keV) are calculated for plasmas containing fast electrons with an anisotropic velocity distribution. The physical and geometrical quantities of the model are orientated towards the future lower-hybrid current drive (LHCD) experiments on Tore-Supra. The parameter space covers parallel and perpendicular temperatures, the nuclear charge of the ions (mainly Z=14 and 28), the cut-off energy of the electrons, the radial current profile and the viewing angle. Extensive calculations present the optimum conditions for polarisation measurements and also give guide-lines for the quantitative interpretation of data under real plasma conditions. A second part of this report will discuss the operational principles and expected performances of hard X-ray polarimeters.

Additional information

Authors: HESSE M, CEA, DEPARTEMENT DE RECHERCHES SUR LA FUSION CONTROLEE, SAINT-PAUL-LEZ-DURANCE (FR);PLATZ P CEA, DEPARTEMENT DE RECHERCHES SUR LA FUSION CONTROLEE, SAINT-PAUL-LEZ-DURANCE (FR), CEA, DEPARTEMENT DE RECHERCHES SUR LA FUSION CONTROLEE, SAINT-PAUL-LEZ-DURANCE (FR)
Bibliographic Reference: REPORT: EUR CEA FC 1376 EN (1989) 81 PP. AVAILABLE FROM CEA, DEPARTEMENT DE RECHERCHES SUR LA FUSION CONTROLEE, 13108 SAINT-PAUL-LEZ-DURANCE (FR)
Record Number: 1989128089300 / Last updated on: 1992-11-04
Category: PUBLICATION
Original language: EN
Available languages: en