Speaker
Description
Fast ions generated by fusion reactions or auxiliary heating system play a quite essential role in magnetic confinement fusion reactor. The experiments on ASDEX-U and DIII-D have shown that low-frequency MHD activities like TM or NTM will induce the fast ion losses[1][2]. Theoretical and simulation analyses indicate two distinct mechanisms for low-frequency MHD-induced fast-ion losses (FIL). For circulating particles, the mechanism involves the overlap of drift islands in phase space, while for trapped particles, it results from resonant interactions with the perturbation field when the ratio between the bounce frequency and the toroidal precession frequency matches the mode frequency[3][4].
Fast ion loss induced by NTM in HL-3 high-beta plasma have been investigated. The main diagnostics for experiment is FILD -- Fast ion Loss Detector. The spectrogram of FILD shows that FIL increase concomitantly with a reduction in the rotation frequency of NTM(Fig 1). Another shot in HL-3 the FIL will onset during the NTM mode locking process and unlocking process. This thesis analysis the quantity relation between FIL and NTM. Detailed results will be presented at this conference.
Reference:
[1]M. García-Muñoz et al 2007 Nucl. Fusion 47 L10.
[2]Phys. Plasmas 15, 032501 (2008).
[3]Phys. Plasmas 15, 056115 (2008).
[4]National Science Review, Volume 9, Issue 11, November 2022, nwac019.
| Speaker's email address | yinzhiyi@swip.ac.cn |
|---|---|
| Speaker's Affiliation | Southwestern Institute of Physics |
| Member State or International Organizations | China |
