Nucleation of  Hydrogen Droplets in Supercooling Condition in Droplet Formation Chamber

LI Zhan-kui; WEI Ji-fang; RONG Xin-juan; YUAN Xiao-hua

doi:10.11804/NuclPhysRev.28.01.071

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LI Zhan-kui, WEI Ji-fang, RONG Xin-juan, YUAN Xiao-hua. Nucleation of Hydrogen Droplets in Supercooling Condition in Droplet Formation Chamber[J]. Nuclear Physics Review, 2011, 28(1): 71-77. doi: 10.11804/NuclPhysRev.28.01.071

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LI Zhan-kui, WEI Ji-fang, RONG Xin-juan, YUAN Xiao-hua. Nucleation of Hydrogen Droplets in Supercooling Condition in Droplet Formation Chamber[J]. Nuclear Physics Review, 2011, 28(1): 71-77. doi: 10.11804/NuclPhysRev.28.01.071

Nucleation of Hydrogen Droplets in Supercooling Condition in Droplet Formation Chamber

doi: 10.11804/NuclPhysRev.28.01.071

1 Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;2 Graduated University of Chinese Academy of Sciences, Beijing 100049, China

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2011-03-20

Abstract

Because of the existence of supercooling in a droplet formation chamber, the hydrogen microspheres are still in liquid phase even though their temperature is lower than the triplepoint temperature. This may cause the droplets to shatter in the vacuum injection capillary. Based on the knowledge about supercooling of liquid hydrogen, we have done a thermodynamic simulation of the droplets in the droplet formation chamber, and theoretically suggested the optimal working conditions under which the droplets will most properly nucleate to solid pellets. The suggested working conditions are that the heliumgas pressure and the hydrogen vapor pressure in the droplet formation chamber are kept as low as possible, and the droplet formation chamber should be noless than 6 cm in the length.
- pellet target,
- hydrogen droplet,
- supercooling,
- nucleation
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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Nucleation of Hydrogen Droplets in Supercooling Condition in Droplet Formation Chamber

doi: 10.11804/NuclPhysRev.28.01.071

1 Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;2 Graduated University of Chinese Academy of Sciences, Beijing 100049, China

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2011-03-20

Key words:

Abstract: Because of the existence of supercooling in a droplet formation chamber, the hydrogen microspheres are still in liquid phase even though their temperature is lower than the triplepoint temperature. This may cause the droplets to shatter in the vacuum injection capillary. Based on the knowledge about supercooling of liquid hydrogen, we have done a thermodynamic simulation of the droplets in the droplet formation chamber, and theoretically suggested the optimal working conditions under which the droplets will most properly nucleate to solid pellets. The suggested working conditions are that the heliumgas pressure and the hydrogen vapor pressure in the droplet formation chamber are kept as low as possible, and the droplet formation chamber should be noless than 6 cm in the length.

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