Effect of energetic trapped particles produced by ICRF wave heating on sawtooth instability in the DIII-D tokamak

M. Choi, V. S. Chan, M. S. Chu, Y. M. Jeon, L. L. Lao, G. Li, R. I. Pinsker, Q. Ren, A. D. Turnbull

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

Abstract

We evaluate the accuracy of the Porcelli sawtooth model using more realistic numerical models from the ORBIT-RF and GATO codes in DIII-D fast wave heating experiments. Simulation results confirm that the fast wave-induced energetic trapped particles may stabilize the sawtooth instability. The crucial kinetic stabilizing contribution strongly depends on both the experimentally reconstructed magnetic shear at the q=1 surface and the calculated poloidal beta of energetic trapped particles inside the q=1 surface.

Original languageEnglish
Title of host publicationRADIO FREQUENCY POWER IN PLASMAS
Subtitle of host publication17th Topical Conference on Radio Frequency Power in Plasmas
Pages95-98
Number of pages4
DOIs
Publication statusPublished - 2007 Dec 14
Event17th Topical Conference on Radio Frequency Power in Plasmas - Clearwater, FL, United States
Duration: 2007 May 72007 May 9

Publication series

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

Conference

Conference17th Topical Conference on Radio Frequency Power in Plasmas
CountryUnited States
CityClearwater, FL
Period07-05-0707-05-09

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Choi, M., Chan, V. S., Chu, M. S., Jeon, Y. M., Lao, L. L., Li, G., Pinsker, R. I., Ren, Q., & Turnbull, A. D. (2007). Effect of energetic trapped particles produced by ICRF wave heating on sawtooth instability in the DIII-D tokamak. In RADIO FREQUENCY POWER IN PLASMAS: 17th Topical Conference on Radio Frequency Power in Plasmas (pp. 95-98). (AIP Conference Proceedings; Vol. 933). https://doi.org/10.1063/1.2800557