Investigation of ICRF Heating Effect in Anchor Region on GAMMA 10/PDX

To investigate end-loss plasma control, several heating operations were carried out using ion-cyclotron range of frequency (ICRF) heating systems in GAMMA 10/PDX. In anchor region, one of the important heating positions to control the end loss particle and heat fluxes, excited ICRF waves are measure...

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Bibliographic Details
Published in:Plasma and Fusion Research 2019/03/22, Vol.14, pp.2402055-2402055
Main Authors: HIRATA, Mafumi, ITAGAKI, Junpei, IKEZOE, Ryuya, ICHIMURA, Makoto, SUMIDA, Shuhei, JANG, Seowon, IZUMI, Koki, TANAKA, Atsuto, KUBOTA, Yushi, SEKINE, Ryo, KAYANO, Hiroki, SAKAMOTO, Mizuki, NAKASHIMA, Yousuke
Format: Article
Language:English
Subjects:
absorption method
anchor region
Anchors
Cyclotron frequency
Cyclotrons
GAMMA 10/PDX
Heat flux
Heating
Heating systems
High temperature effects
ICRF
Ion cyclotron radiation
microwave reflectometer
Phase control
Phase transitions
Photodiodes
Plasma control
Upgrading
Variations
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Summary:To investigate end-loss plasma control, several heating operations were carried out using ion-cyclotron range of frequency (ICRF) heating systems in GAMMA 10/PDX. In anchor region, one of the important heating positions to control the end loss particle and heat fluxes, excited ICRF waves are measured as the density fluctuations using an upgraded reflectometer system and the detailed radial profiles are observed. The efficiency of anchor heating was changed using the phase control between two antennas installed in the anchor and/or the central region. The interference of two waves during a phase-control ICRF heating has been directly measured inside the plasma. In addition, several phase dependencies were observed using absorption methods with photodiode in anchor region.
ISSN:1880-6821
1880-6821
DOI:10.1585/pfr.14.2402055