Review of ICR Heating on the Spherical Tokamak Globus-M
- Ioffe Physico-Technical Institute, RAS, Politekhnicheskaja st. 26, St. Petersburg, 194021 (Russian Federation)
The results of experiments on the RF heating of hydrogen-deuterium plasma at ion cyclotron frequencies in the Globus-M spherical tokamak are presented. RF power up to 200 kW at frequencies about 7.5-9 MHz fed via a single-loop antenna led to an increase in the ion temperature from 180 eV up to 400 eV in the best case. High heating efficiency is maintained at high H-concentration (up to 70%). Characteristic times of the ion temperature buildup and decay corresponded to the ion energy confinement time. If the second hydrogen harmonic is arranged in front of antenna, on-axis ion heating becomes worse. It is shown, that in Globus conditions graphite shielding of an inner surface of a vacuum chamber decreases heating due to surface absorption of RF power. Simulation of processes of RF power absorption is performed also. For modeling 1-D wave code was used including all possible mechanisms of RF power absorption.
- OSTI ID:
- 21335704
- Journal Information:
- AIP Conference Proceedings, Vol. 1187, Issue 1; Conference: 18. topical conference on radio frequency power in plasmas, Gent (Belgium), 24-26 Jun 2009; Other Information: DOI: 10.1063/1.3273726; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Fast wave ICRF minority heating experiments on the Alcator C tokamak
Ion cyclotron resonance heating (ICRH) start-up antenna for the mirror fusion test facility (MFTF-B)
Related Subjects
ANTENNAS
COMPUTERIZED SIMULATION
CONFINEMENT TIME
CYCLOTRON FREQUENCY
D WAVES
DEUTERIUM
EV RANGE
GLOBUS-M SPHEROMAK
GRAPHITE
HYDROGEN
ICR HEATING
ION TEMPERATURE
MHZ RANGE
PLASMA
PLASMA DENSITY
PLASMA DIAGNOSTICS
PLASMA SIMULATION
PLASMA WAVES
RF SYSTEMS
SPHERICAL CONFIGURATION