Speaker
Mr
Yuan Huang
(China)
Description
The H-mode discharge is generally accompanied by quasiperiodic edge localized mode (ELM) events. Many efforts have been spent worldwide on the understanding, mitigation and control of the ELMs, in order to eventually suppress the most destructive ELMs to meet the lifetime requirements on ITER target plates. The pellet pacing ELM mitigation concept is being tested in many tokamaks, but the mechanism of a pellet triggering an ELM is yet partly understood. In HL-2A tokamak, ELMy H-mode operation is routinely performed and small type-III ELMs with high repetition rate and some type-I (or possibly large type-III) ELM events are observed. Pellet injection experiments are performed in ELMy H-mode and ELM-free H-mode as well as L-mode plasmas to study the physics of pellet triggering ELM. The analysis and comparison of magnetic perturbation spectra and the toroidal mode number of pellet-triggered ELM events with those of spontaneous ELMs in H-mode plasmas, are presented in this article.
Country or International Organization of Primary Author
China
Collaboration (if applicable, e.g., International Tokamak Physics Activities)
ITER Pedestal Physics
Primary author
Mr
Yuan Huang
(China)
Co-authors
Mrs
Chunhua Liu
(Southwestern Institute of Physics)
Dr
Deliang Yu
(Southwestern Institute of Physics)
Mr
Genliang Zhu
(Southwestern Institute of Physics)
Dr
Jianyong Cao
(Southwestern Institute of Physics)
Prof.
Jiaqi Dong
(Southwestern Institute of Physics)
Dr
Jun Zhou
(Southwestern Institute of Physics)
Mr
Ke Yao
(Southwestern Institute of Physics)
Mr
Lin Nie
(Southwestern Institute of Physics)
Dr
Longwen Yan
(Southwestern Institute of Physics)
Dr
Qingwei Yang
(Southwestern Institute of Physics)
Mr
Quanming Wang
(Southwestern Institute of Physics)
Dr
Xianming Song
(Southwestern Institute of Physics)
Dr
Xiaoquan Ji
(Southwestern Institute of Physics)
Prof.
Xuantong Ding
(Southwestern Institute of Physics)
Prof.
Xuru Duan
(Southwestern Institute of Physics)
Dr
Yi Liu
(Southwestern Institute of Physics)
Prof.
Yong Liu
(Southwestern Institute of Physics)
Mr
Zhen Feng
(Southwestern Institute of Physics)
Mrs
Zhengying Cui
(Southwestern Institute of Physics)
