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Measurements of mode converted ion cyclotron wave with phase contrast imaging in Alcator C-Mod and comparisons with synthetic PCI simulations in TORIC

  • N. Tsujii
  • , M. Porkolab
  • , E. M. Edlund
  • , L. Lin
  • , Y. Lin
  • , J. C. Wright
  • , S. J. Wukitch
  • Massachusetts Institute of Technology

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

Abstract

Mode converted ion cyclotron wave (ICW) has been observed with phase contrast imaging (PCI) in D-3He plasmas in Alcator C-Mod [1, 2]. The measurements were carried out with the optical heterodyne technique using acousto-optic modulators which modulate the CO2 laser beam intensity near the ion cyclotron frequency [3]. With recently improved calibration of the PCI system using a calibrated sound wave source, the measurements have been compared with the full-wave code TORIC, as interpreted by a synthetic diagnostic. Because of the line-integrated nature of the PCI signal, the predictions are sensitive to the exact wave field pattern. The simulations are found to be in qualitative agreement with the measurements.

Original languageEnglish
Title of host publicationRadio Frequency Power in plasmas - Proceedings of the 18th Topical Conference
Pages65-68
Number of pages4
DOIs
StatePublished - 2009
Event18th Topical Conference on Radio Frequency Power in plasmas - Gent, Belgium
Duration: Jun 24 2009Jun 26 2009

Publication series

NameAIP Conference Proceedings
Volume1187

Conference

Conference18th Topical Conference on Radio Frequency Power in plasmas
Country/TerritoryBelgium
CityGent
Period06/24/0906/26/09

Keywords

  • Alcator C-Mod
  • ICRF
  • Mode conversion
  • Phase contrast imaging
  • TORIC

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