ECH experiments aiming at further advanced operations in LHD

H. Igami, S. Kubo, T. Shimozuma, Inagaki Shigeru, K. Nagasaki, H. Tanaka, Y. Yoshimura, T. Notake, T. Maekawa, M. Uchida, J. Miyazawa, I. Yamada, K. Narihara, N. Tamura, K. Ida, T. Mutoh, A. Komori

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

Abstract

In the Large helical device (LHD), super dense core (SDC) regime [1] and high electron temperature regime with formation of the electron internal transport barrier (e-ITB) [2][3] have been studied strenuously. Electron cyclotron heating (ECH) and current drive (ECCD) in such regimes can be powerful tools for heating and control of the plasma confinement. In this paper, recent progress of ECH experiments aiming at further advanced operation in these regimes is reported. Study of fundamental ECH by electron Bernstein waves (EBWs) has been required in the SDC regime. Early experimental results of EBW-ECH by so-called O-X-B and X-B method are introduced. In a newly realized enhanced magnetic field configuration, the highest central electron temperature over 10 keV was obtained in electron cyclotron resonance (ECR) discharges. ECCD will be very important in both of high density and high temperature regimes. It has been progressed with the optimization of microwave injection and magnetic field configuration. Progress of ECCD experiment is shortly introduced.

Original languageEnglish
Title of host publicationRADIO FREQUENCY POWER IN PLASMAS
Subtitle of host publication17th Topical Conference on Radio Frequency Power in Plasmas
Pages377-384
Number of pages8
DOIs
Publication statusPublished - Dec 17 2007
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

Other

Other17th Topical Conference on Radio Frequency Power in Plasmas
CountryUnited States
CityClearwater, FL
Period5/7/075/9/07

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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