Estimation of the ion toroidal rotation source due to momentum transfer from Lower Hybrid waves in Alcator C-Mod

J. P. Lee, J. C. Wright, P. T. Bonoli, R. R. Parker, P. J. Catto, Y. A. Podpaly, J. E. Rice, M. L. Reinke

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

Significant ion toroidal rotation ( 50km/s) has been measured by X-Ray spectroscopy for impurities in Alcator C-Mod during lower hybrid (LH) RF power injection [1]. We investigate the relation between the computed toroidal momentum input from LH waves and the measured INITIAL change of ion toroidal rotation when the LH power is turned on. The relation may depend on the plasma current and magnetic configuration [2, 3]. Because of the fast build up time of the electron quasilinear plateau (<1millisecond), the electron distribution function rapidly reaches steady state in which the electrons transfer momentum to the ions. The LH wave momentum input is computed from the self consistent steady state electron distribution function and a bounce-averaged quasilinear diffusion coefficient that are obtained by iterating a full wave code (TORLH) with a Fokker Plank code (CQL3D)

Original languageEnglish
Title of host publicationRadio Frequency Power in Plasmas - Proceedings of the 19th Topical Conference
Pages459-462
Number of pages4
DOIs
StatePublished - 2011 Dec 1
Event19th Topical Conference on Radio Frequency Power in Plasmas - Newport, RI, United States
Duration: 2011 Jun 12011 Jul 3

Publication series

NameAIP Conference Proceedings
Volume1406
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other19th Topical Conference on Radio Frequency Power in Plasmas
CountryUnited States
CityNewport, RI
Period11/06/111/07/3

Keywords

  • Alcator-C Mod
  • Lower hybrid wave
  • Rotation
  • Tokamaks

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    Lee, J. P., Wright, J. C., Bonoli, P. T., Parker, R. R., Catto, P. J., Podpaly, Y. A., Rice, J. E., & Reinke, M. L. (2011). Estimation of the ion toroidal rotation source due to momentum transfer from Lower Hybrid waves in Alcator C-Mod. In Radio Frequency Power in Plasmas - Proceedings of the 19th Topical Conference (pp. 459-462). (AIP Conference Proceedings; Vol. 1406). https://doi.org/10.1063/1.3665015