Accession Number : ADA140688

Title :   Transmission System Development for Electron Cyclotron Heating Experiments of a Tokamak Plasma.

Descriptive Note : Final rept. 13 May 81-12 Jul 82,


Personal Author(s) : Levine,J S

PDF Url : ADA140688

Report Date : 02 Apr 1984

Pagination or Media Count : 48

Abstract : The heating of tokamak plasmas by microwaves at electron cyclotron frequency has been the subject of investigation for several years by several groups including the Naval Research Laboratory (NRL). To enable electron cyclotron heating (ECH) to produce significant temperature increases, the incident microwave power must be as strong as, or stronger than, the ohmic heating power required for the tokamak discharge. However, ECH experiments are limited to the current available microwave power. To address the issue of microwave power, NRL designed, built and tested a high power (approx. 300 kW) gyrotron for operation at a 1 microsec pulse length. In order to use this source for ECH experiments, a transmission system was designed and built that polarized the microwaves for optimal heating efficiency and coupled them into the tokamak plasma with minimal loss. The development of the transmission system is the topic of this Final Report. The report consists of two parts. First is a paper describing the subject of rippled wall mode converters for circular waveguides. The second part is a compilation of the engineering drawings developed for the construction of the antenna or transmission system.

Descriptors :   *Microwave antennas, *Waveguides, *Wave equations, *Tokamaks, Plasmas(Physics), Computations, Electrons, Cyclotrons, Heating, Microwaves, Polarization, Engineering drawings

Subject Categories : Electrical and Electronic Equipment
      Numerical Mathematics
      Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE