The hydrogen migration in cryogenic tubes of superconductive accelerator with gas source View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2019-06

AUTHORS

Chuanfei Hu, Feng Bai, Wanhong Guo, Yukui Yin, Yugang Zhao, Junhui Zhang

ABSTRACT

In superconductive linear accelerator, the performance and stability can be impacted by gas adsorbed on cryogenic surfaces adversely. The cryogenic devices usually work at 4.2 K or 1.9 K and are refrigerated by normal or super fluid liquid helium, respectively. The purpose of this paper is to study the character of gas migration in cryogenic tubes. Adsorption coefficient for hydrogen at 4.2 K is measured by experimental study. Then, a gas migration model is established based on the experimental results to depict the hydrogen migration process in cryogenic tubes. The experimental results and model analysis indicated that at cryogenic temperature (4.2 K), adsorption coefficient for hydrogen is very close to 1, which is several orders higher than the adsorption coefficient at room temperature, resulting in a unique pressure distribution pattern in cryogenic tubes when compared with the pressure distribution in room temperature tubes. At 4.2 K or 1.9 K, the gas migration process is obviously different from the process at room temperature and is significantly affected by the gas adsorption on the cryogenic surfaces. The model established in this article can be applied not only to hydrogen migration in cryogenic tubes but also to other gas migration in tubes with high adsorption coefficient. More... »

PAGES

10

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s41605-018-0086-7

DOI

http://dx.doi.org/10.1007/s41605-018-0086-7

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