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Confinement effects of mandrel degradation in ICF target fabrication.

Authors :
Xin, Yue
Yang, Xinrui
Wan, Chenxi
Wang, Rui
Zhu, Yu
Yi, Yong
Zhang, Zhanwen
Tang, Yongjian
Chen, Qiang
Wang, Zhigang
Source :
Journal of Chemical Physics. 4/28/2024, Vol. 160 Issue 16, p1-7. 7p.
Publication Year :
2024

Abstract

Understanding and further regulating the degradation of mandrel materials is a key aspect of target fabrication in inertial confinement fusion (ICF). Here, a quasi-one-dimensional confinement model is developed using a series of single-walled carbon nanotubes with varying diameters (Dm), and the degradation of poly-α-methylstyrene (PAMS) as a typical mandrel material is investigated under such confined conditions by using the combined method of quantum mechanics and molecular mechanics. In comparison to the isolated system, the calculations show that confinement can decrease or increase the energy barriers of PAMS degradation, which directly depends on Dm. Following which a clear exponential relationship between the degradation rate of PAMS and its own density is derived, indicating that the density of PAMS can be used to regulate mandrel degradation. This work highlights the important effects of confinement on degradation and provides a valuable reference for further development of polymer degradation technologies in ICF target fabrication and other fields. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00219606
Volume :
160
Issue :
16
Database :
Academic Search Index
Journal :
Journal of Chemical Physics
Publication Type :
Academic Journal
Accession number :
177184108
Full Text :
https://doi.org/10.1063/5.0196688