Deuterium pellet fueling in type-III ELMy H-mode plasmas on EAST superconducting tokamak

TY - JOUR

T1 - Deuterium pellet fueling in type-III ELMy H-mode plasmas on EAST superconducting tokamak

AU - Hou, Jilei

AU - Hu, Jiansheng

AU - Chen, Yue

AU - Wang, Yumin

AU - Zang, Qing

AU - Xu, Jichan

AU - Liu, Haiqing

AU - Tritz, Kevin

AU - Gilson, Erik

AU - Yuan, Xiaolin

AU - Sun, Zhen

AU - Maingi, Rajesh

AU - Zhao, Hailin

AU - Li, Jiangang

N1 - Publisher Copyright: © 2019

PY - 2019/8

Y1 - 2019/8

N2 - Type-III ELMy H-mode plasmas are a valuable operating scenario, as they may simultaneously achieve fusion power gain of Q = 10 and acceptable steady-state and peak power fluxes to the plasma-facing components. It is important to investigate cryogenic deuterium pellet injection fueling in this kind of H-mode plasma since it has been chosen as a main plasma fueling technique for ITER. Recently, pellet fueling experiments have been successfully carried out on EAST, an ITER-like tokamak. A maximum electron density of 0.73 × nGW has been obtained. It is found that ELM behavior was modified immediately and a string of small ELMs were induced when pellets were injected at a low velocity from ˜40 cm above the mid-plane on the low field side, which is different from the fact that pellets trigger signal ELMs in Type-I ELMy H-mode plasmas in other tokamaks. The decreased edge temperature caused by the cryogenic pellet was proposed as the reason for this ELM modification. These results will provide a useful reference for the pellet fueling in a Type-III ELMy H-mode plasma on ITER in the future.

AB - Type-III ELMy H-mode plasmas are a valuable operating scenario, as they may simultaneously achieve fusion power gain of Q = 10 and acceptable steady-state and peak power fluxes to the plasma-facing components. It is important to investigate cryogenic deuterium pellet injection fueling in this kind of H-mode plasma since it has been chosen as a main plasma fueling technique for ITER. Recently, pellet fueling experiments have been successfully carried out on EAST, an ITER-like tokamak. A maximum electron density of 0.73 × nGW has been obtained. It is found that ELM behavior was modified immediately and a string of small ELMs were induced when pellets were injected at a low velocity from ˜40 cm above the mid-plane on the low field side, which is different from the fact that pellets trigger signal ELMs in Type-I ELMy H-mode plasmas in other tokamaks. The decreased edge temperature caused by the cryogenic pellet was proposed as the reason for this ELM modification. These results will provide a useful reference for the pellet fueling in a Type-III ELMy H-mode plasma on ITER in the future.

KW - EAST

KW - Fueling

KW - Pellet injection

KW - Type-III ELM

UR - https://www.scopus.com/pages/publications/85066410807

UR - https://www.scopus.com/pages/publications/85066410807#tab=citedBy

U2 - 10.1016/j.fusengdes.2019.05.038

DO - 10.1016/j.fusengdes.2019.05.038

M3 - Article

SN - 0920-3796

VL - 145

SP - 79

EP - 86

JO - Fusion Engineering and Design

JF - Fusion Engineering and Design

ER -