Synchrotron radiation in inhomogeneous tokamak plasmas
Synchrotron emission in a tokamak configuration with inhomogeneous plasma parameters is considered in order to investigate the effects of the temperature profile and vertical elongation on the radiation loss. Using the numerical solution of the transfer equation for ITER-like plasma parameters, several new results on the radiated energy in a Maxwellian plasma have been obtained: (i) synchrotron loss is profile dependent, in that at constant average thermal energy, the emitted radiation increases with the peak temperature; (ii) an analytical formula of the global loss in inhomogeneous tokamak plasmas with arbitrary vertical elongation is established; (iii) the maximum of the frequency emission spectrum is a linear function of the volume average temperature; (iv) high frequency synchrotron radiation is due entirely to electrons with energy much greater than the thermal energy. The need for experimental investigations on synchrotron emission in present-day large tokamaks, to determine the effect of reflections of the complex tokamak first wall, is emphasised.
Bibliographic Reference: Report: EUR-CEA-FC-1449 EN (1992) 28 pp.
Availability: Available from CEA, Département de Recherches sur la Fusion Contrôlée, Saint-Paul-lez-Durance (FR)
Record Number: 199210524 / Last updated on: 1994-12-02
Original language: en
Available languages: en