Validating the lower hybrid interdigital-line antenna on MST

M. C. Kaufman, J. A. Goetz, D. R. Burke, A. F. Almagri, S. P. Oliva, J. G. Kulpin

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations

Abstract

Lower hybrid current drive has been posited as a means to reduce tearing fluctuations and improve confinement in the reversed field pinch. The third generation interdigital-line antenna has been installed in MST and preliminary testing has been completed. Source power to the antenna has been increased to >220kW in both feed directions. Under vacuum conditions the n spectrum is peaked at ∼7.5 as expected with excellent directionality. External tuning gives a VSWR <1.3 under most operating conditions; however, power diagnostics on the resonators show a standing wave on the antenna which could affect launch spectrum. Initial plasma parameter surveys show behavior similar to the previous generation antenna. Hard x-ray detectors show flux is toroidally peaked, but still indicative of rf-plasma interaction.

Original languageEnglish
Title of host publicationRADIO FREQUENCY POWER IN PLASMAS
Subtitle of host publication17th Topical Conference on Radio Frequency Power in Plasmas
Pages309-312
Number of pages4
DOIs
StatePublished - 2007
Externally publishedYes
Event17th Topical Conference on Radio Frequency Power in Plasmas - Clearwater, FL, United States
Duration: May 7 2007May 9 2007

Publication series

NameAIP Conference Proceedings
Volume933
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference17th Topical Conference on Radio Frequency Power in Plasmas
Country/TerritoryUnited States
CityClearwater, FL
Period05/7/0705/9/07

Keywords

  • Antenna
  • Interdigital
  • LHRF
  • MST
  • RFP

Fingerprint

Dive into the research topics of 'Validating the lower hybrid interdigital-line antenna on MST'. Together they form a unique fingerprint.

Cite this