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Abstract

The ECRH facility on TFR uses three 60 GHz, 200 kW, 100 ms gyrotrons. The power is launched from the low field side of the torus in the ordinary mode polarization. Introductory experiments were performed with one gyrotron connected to TFR. Approximately 100 kW of microwave power was injected into the plasma T 30 ms pulse length. The full system with three transmission lines connected to TFR has recently come into operation. Heating experiments at full power show electron temperature increase up to 2 keV and a limited degradation of confinement. MHD stabilization experiments demonstrate suppression of the m=2 mode up to the maximum ECRH pulse length (300 ms). The first experiments on current drive with oblique injection of microwave power and a frozen primary loop voltage do not show a current increase that cannot be explained by a thermal decrease of resistivity.

Additional information

Authors: TFR GROUP, CEA, FONTENAY-AUX-ROSES (FRANCE);FOM-INSTITUUT VOOR PLASMAFYSICA, RIJNHUIZEN, NIEUWEGEIN (THE NETHERLANDS);HOEKZEMA J A, CEA, FONTENAY-AUX-ROSES (FRANCE);FOM-INSTITUUT VOOR PLASMAFYSICA, RIJNHUIZEN, NIEUWEGEIN (THE NETHERLANDS);DE ESCH H P L, CEA, FONTENAY-AUX-ROSES (FRANCE);FOM-INSTITUUT VOOR PLASMAFYSICA, RIJNHUIZEN, NIEUWEGEIN (THE NETHERLANDS);POLMAN R W, CEA, FONTENAY-AUX-ROSES (FRANCE);FOM-INSTITUUT VOOR PLASMAFYSICA, RIJNHUIZEN, NIEUWEGEIN (THE NETHERLANDS);SCHRADER W J CEA, FONTENAY-AUX-ROSES (FRANCE), CEA, FONTENAY-AUX-ROSES (FRANCE);FOM-INSTITUUT VOOR PLASMAFYSICA, RIJNHUIZEN, NIEUWEGEIN (THE NETHERLANDS);FOM-INSTITUUT VOOR PLASMAFYSICA, RIJNHUIZEN, NIEUWEGEIN (THE NETHERLANDS), CEA, FONTENAY-AUX-ROSES (FRANCE);FOM-INSTITUUT VOOR PLASMAFYSICA, RIJNHUIZEN, NIEUWEGEIN (THE NETHERLANDS)
Bibliographic Reference: WRITE TO FOM-INSTITUUT VOOR PLASMAFYSICA, RIJNHUIZEN,NIEUWEGEIN (THE NETHERLANDS), MENTIONING REPORT I.R. 85/048, 1985
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