Utilization of electron bernstein wave heating and current drive for tokamak startup and advanced operations

H. Tanaka, T. Maekawa, M. Uchida, S. Nishi, H. Igami, S. Kubo, T. Shimozuma, Y. Yoshimura, H. Takahashi, J. Miyazawa, T. Mutoh, A. Komori, T. Yoshinaga, S. Inagaki, K. Nagasaki, T. Notake

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

Abstract

Utilization of electron Bernstein wave (EBW) for tokamak startup and advanced heating in helical device is demonstrated. In the LATE device, plasma current is started up and ramped up to 20 kA by injecting a 5 GHz, 190 kW, 70 ms microwave pulse in the electron cyclotron range of frequency and controlling the applied vertical field. The electron density exceeds the plasma cutoff density. The plasma current is carried by a unidirectional tail electrons against the reverse electric field from self-induction, suggesting the acceleration along the magnetic field via cyclotron absorption of mode-converted electron Bernstein wave (EBW) with high refractive indices along the magnetic field. In LHD, the extraordinary mode is injected to the upper hybrid resonance layer from the high field side and EBW heating is observed at much inner radius away from the fundamental electron cyclotron resonance layer.

Original languageEnglish
Title of host publicationProceedings of the 15th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating, EC-15
PublisherWorld Scientific Publishing Co. Pte Ltd
Pages96-103
Number of pages8
ISBN (Print)9812814639, 9789812814630
Publication statusPublished - Jan 1 2009
Event15th Joint Workshop on Electron Cyclotron Emission, ECE 2008 and Electron Cyclotron Heating, ECH 2008 - Yosemite Village, CA, United States
Duration: Mar 10 2008Mar 13 2008

Publication series

NameProceedings of the 15th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating, EC-15

Other

Other15th Joint Workshop on Electron Cyclotron Emission, ECE 2008 and Electron Cyclotron Heating, ECH 2008
CountryUnited States
CityYosemite Village, CA
Period3/10/083/13/08

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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    Tanaka, H., Maekawa, T., Uchida, M., Nishi, S., Igami, H., Kubo, S., Shimozuma, T., Yoshimura, Y., Takahashi, H., Miyazawa, J., Mutoh, T., Komori, A., Yoshinaga, T., Inagaki, S., Nagasaki, K., & Notake, T. (2009). Utilization of electron bernstein wave heating and current drive for tokamak startup and advanced operations. In Proceedings of the 15th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating, EC-15 (pp. 96-103). (Proceedings of the 15th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating, EC-15). World Scientific Publishing Co. Pte Ltd.