Open AccessEffect of cooling rate on layering ICF cryogenic ice characterized by backlit shadowgraphy
Author(s) -
Kai Wang,
Lin Wei,
Yuanqiong Liu,
Duan Xie,
Jun Li,
Ma Kun-Quan,
Tang Yongjian,
Lei Hai-Le
Publication year - 2012
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.61.195204
Subject(s) - shadowgraphy , backlight , layering , materials science , inertial confinement fusion , deuterium , optics , physics , atomic physics , laser , botany , liquid crystal display , biology
The effect of cooling rate on layering the deuterium ice inside inertial confinement fusion (ICF)spherical cryotarget is studied by backlit shadowgraphy. Experimentally, the temperature of ice is first determined by the calibration of temperature field around ICF cryotarget. The solidification process of deuterium in the cryotarget is in- situ characterized by backlit shadowgraphy. The power-spectrum density of the bright ring in shadowgraphy at different cooling rates is obtained. Experimental results demonstrate that the step-gradient slow cooling is favorable for forming uniform fuel ice in comparison with the rapid cooling. Furthermore, the validity of characterizing the ICF cryotarget layering by the backlit shadowgraphy is also verified.