Physics and engineering design of 400 keV H- accelerator for negative ion based neutral beam injection system in China

Jianglong Wei; Chundong Hu; Yahong Xie; Yuming Gu; Lizhen Liang; Caichao Jiang; Yuanlai Xie

doi:10.1063/1.5128335

Physics and engineering design of 400 keV H^- accelerator for negative ion based neutral beam injection system in China

Rev Sci Instrum. 2019 Nov 1;90(11):113313. doi: 10.1063/1.5128335.

Authors

Jianglong Wei¹, Chundong Hu¹, Yahong Xie¹, Yuming Gu¹, Lizhen Liang¹, Caichao Jiang¹, Yuanlai Xie¹

Affiliation

¹ Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People's Republic of China.

PMID: 31779404
DOI: 10.1063/1.5128335

Abstract

A research project of the China Fusion Engineering Test Reactor (CFETR) Negative ion-based Neutral Beam Injection (NNBI) prototype has been started in China. The objectives of the CFETR NNBI prototype are to produce a negative hydrogen ion beam of >20 A up to 400 keV for 3600 s and to attain a neutralization efficiency of >50%. In order to identify and optimize the design of the negative ion accelerator, a self-consistent model has been developed to consider all key physics and engineering issues (electric and magnetic fields, background gas flow, beam optics, beam-gas interaction, secondary particle trajectories, power deposition on grids, heat removal design, and mounting pattern). This paper presents the primary results by applying the self-consistent model to the current design of the 400 keV H^- accelerator of the CFETR NNBI prototype.