A MECHANISM FOR THE EMISSION FROM TOKAMAKS OF NARROW BAND BURSTS OF RADIATION AT THE PLASMA FREQUENCY
The problem of the excitation of electromagnetic radiations at the plasma frequency omega-p by a small density beam, under the condition omega-p < omega-c (where omega-c is the electron cyclotron frequency) is studied. We show that for small values of the normal wave number k-perpendicular the general cold plasma dispersion relation shows a linear coupling between the electromagnetic TM mode (or E-z mode) at omega approximately equal omega-p and the electromagnetic TE mode (or B-z mode) at the right hand circularly polarized whistler electron cyclotron branch. An electron beam can excite this electromagnetic mode if its velocity v-o satisfy the Cerenkov resonance condition omega approximately equal k-z v-o. The present results may explain some features of the narrow-band bursts of electromagnetic radiations at the plasma frequency omega-p which are emitted from Tokamak plasmas.
Bibliographic Reference: WRITE TO INSTITUT DE RECHERCHE D'HYDRO-QUEBEC, 1800 MONTEE SAINTE-JULIE, VARENNES, QUEBEC, CANADA J0L 2P0 MENTIONING REPORT TV-RI 162, 1984
Record Number: 1989124059200 / Last updated on: 1987-01-01
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