EFFECTS OF NONLINEAR-WAVE ABSORPTION ON THE RADIATION LOSS FRACTION DURING 2ND-HARMONIC MINORITY ION-CYCLOTRON RESONANCE HEATING EXPERIMENTS IN JT-60U

Citation
M. Saigusa et al., EFFECTS OF NONLINEAR-WAVE ABSORPTION ON THE RADIATION LOSS FRACTION DURING 2ND-HARMONIC MINORITY ION-CYCLOTRON RESONANCE HEATING EXPERIMENTS IN JT-60U, JPN J A P 1, 36(1A), 1997, pp. 345-349
Citations number
18
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics, Applied
Volume
36
Issue
1A
Year of publication
1997
Pages
345 - 349
Database
ISI
SICI code
0021-4922(1997)36:1A<345:EONAOT>2.0.ZU;2-2
Abstract
The ratio of an increment in radiation power to ion cyclotron resonanc e heating (ICRH) power (Delta P-rad(main)/P-IC) decreased from about 4 0% to below 10% with increasing ICRH power in JT-60U. The most plausib le mechanism for the anomalous behavior of Delta P-rad(main)/P-IC is i nferred to be nonlinear wave absorption, which was experimentally esti mated from the time derivative of the diamagnetic stored energy at the turn-off timing of the ICRH pulse. Nonlinear wave absorption observed during the experiments supported the theoretical estimation using a f ull wave code incorporating the 1-D Fokker-Planck code.