Development of internal ICRF wave detection using microwave reflectometry on GAMMA 10

R. Ikezoe, M. Ichimura, J. Itagaki, M. Hirata, S. Sumida, S. Jang, M. Yoshikawa, J. Kohagura, M. Sakamoto, Y. Nakashima

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

2 Citations (Scopus)

Abstract

The microwave reflectometer system in the GAMMA 10 central cell has been recently upgraded using PIN diode switches and an axial array of transmitting and receiving horn antennas to investigate internal structures of ICRF waves. The system successfully worked to measure high-frequency density fluctuations accompanied by ICRF waves at multi axial locations in a single discharge. By using several discharges for radial scan with the axial antenna switching, radial and axial measurement of the density fluctuations was achieved. Obtained profiles of 6.36 MHz ICRF wave for ion heating show axial variation in those intensity, suggesting the effect of cyclotron damping. Furthermore, in accordance with the unexplained variation of diamagnetism before the main ramp-up, the intensity near the ICRF antenna is found to also vary in time. The developed system is useful to study the behavior of ICRF waves inside a hot plasma.

Original languageEnglish
Title of host publicationOpen Magnetic Systems for Plasma Confinement, OS 2016
Subtitle of host publicationProceedings of the 11th International Conference on Open Magnetic Systems for Plasma Confinement
EditorsAleksey Arakcheev, Anton Sudnikov
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735414297
DOIs
Publication statusPublished - Oct 11 2016
Externally publishedYes
Event11th International Conference on Open Magnetic Systems for Plasma Confinement, OS 2016 - Akademgorodok, Novosibirsk, Russian Federation
Duration: Aug 8 2016Aug 12 2016

Publication series

NameAIP Conference Proceedings
Volume1771
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other11th International Conference on Open Magnetic Systems for Plasma Confinement, OS 2016
CountryRussian Federation
CityAkademgorodok, Novosibirsk
Period8/8/168/12/16

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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