Mode-transforming polarization-rotatable launcher for the ATF fusion experiment

T. S. Bigelow, T. L. White, H. D. Kimrey, C. R. Schaich

Research output: Contribution to journalConference articlepeer-review

Abstract

The Advanced Toroidal Facility (ATF) fusion energy experiment at the Oak Ridge National Laboratory (ORNL) requires high-power microwaves for startup and plasma heating. Power from a gyrotron oscillator tube at 53.2 GHz will be used to ionize and heat the plasma by the electron cyclotron heating (ECH) process. The confining magnetic field of the device is either 0.95 or 1.9 T. The gyrotron tube generates 200 kW in the TE02 mode, which is transported in an overmoded 6.35-cm-diam circular waveguide to the ATF vacuum vessel. The launcher consists of a mode-converting Vlasov section, which converts the nonpolarized TE02 wave into a linearly polarized narrow beam. The beam reflects off a tilted spherical reflector grating and is focused at the center of the plasma. The launcher design and laboratory measurements are discussed.

Original languageEnglish
Pages (from-to)581-584
Number of pages4
JournalIEEE Antennas and Propagation Society, AP-S International Symposium (Digest)
Volume2
StatePublished - 1988

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