Flow visualization and density measurement of the supersonic molecular beam for fusion plasma fueling

Autor:	Guo-Liang Xiao, M. Xu, Bingli Li, C. Y. Chen, Xuru Duan, Wulyu Zhong, Weiwen Xiao, Yi-Po Zhang, Jiao Yin, Feng Beibin, Tianbo Wang
Rok vydání:	2021
Předmět:	010302 applied physics Materials science business.industry Nozzle Plasma 01 natural sciences 010305 fluids & plasmas Light intensity Optics Schlieren 0103 physical sciences Vacuum chamber Supersonic speed business Instrumentation Molecular beam Beam (structure)
Zdroj:	Review of Scientific Instruments. 92:043539
ISSN:	1089-7623 0034-6748
DOI:	10.1063/5.0039181
Popis:	The supersonic molecular beam injection (SMBI) technique is widely used in magnetic fusion devices for plasma fueling and active control of particles. The beam flow formed by the SMBI system is directly visualized by a newly established schlieren diagnostic system on the SMBI testing platform. This schlieren system could provide a 2D density distribution of the beam with the sub-mm spatial resolution by detecting the change in the refractive index of the medium caused by the SMBI in the low-pressure vacuum chamber. The structure and the divergence angle of the supersonic molecular beam for fusion plasma fueling are first measured. Additionally, the density profile of the supersonic molecular beam is reconstructed from the measured light intensity by the schlieren system. The experimental comparison between the standard nozzle and the optimized nozzle of the SMBI system shows the great potential of the diagnostic system in optimizing the beam characteristics.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d86cc8431c694d79e3fbefc9cecaafd2 https://doi.org/10.1063/5.0039181 Zobrazit plný text záznamu