Possibility of Using the 140 GHz Frequency for ECR Plasma Heating in the T-15MD Tokamak.

Electron cyclotron resonance heating is one of the methods of additional plasma heating in the T-15MD tokamak. The article considers the possibility of plasma heating using an extraordinary wave at the third harmonic of electron cyclotron resonance at a frequency of 140 GHz. It has been shown that, in accordance with the calculations by the quasi-linear OGRAY code, a high fraction of single-pass absorption (up to 96%) can be expected even when the ECR is turned on with an ohmic background. Increase in this fraction with the increase in plasma temperature agrees with the theoretical predictions. Vertical power launch seems to be the most attractive. Possible engineering solutions for implementation of such a scheme are proposed. [ABSTRACT FROM AUTHOR]