Direct Laser-Driven Quasi-Isentropic Compression on HEAVEN-I Laser

The HEAVEN-I laser is used for direct drive quasi-isentropic compression up to -18 GPa in samples of aluminum without being temporal pulse shaped. The monotonically increasing loading is with a rise time over 17ns. The compression history is well reproduced by the ID radiation hydrodynamics simulati...

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Bibliographic Details
Published inChinese physics letters Vol. 32; no. 7; pp. 95 - 98
Main Author 张品亮 汤秀章 李业军 王钊 田宝贤 殷倩 陆泽 向益淮 高智星 李静 胡凤鸣 龚自正
Format Journal Article
LanguageEnglish
Published 01.07.2015
Subjects
Aluminum
Compressing
Entropy
Fluid dynamics
Illumination
Lasers
Precursors
Simulation
上升时间
典型剖面
准等熵压缩
加载过程
单调增加
流体力学模拟
激光直接驱动
脉冲形状
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Summary:The HEAVEN-I laser is used for direct drive quasi-isentropic compression up to -18 GPa in samples of aluminum without being temporal pulse shaped. The monotonically increasing loading is with a rise time over 17ns. The compression history is well reproduced by the ID radiation hydrodynamics simulation. We find that a small shock precursor where the backward integration method cannot process is formed at the beginning of illumination. We compare the loading process of HEAVEN-I with the typical profile （concave down, prefect pulse shape）, the results show that a typical profile can obtain more slowly rising and higher pressure, and the shock precursor has significant effects on temperature and entropy production. However, it is demonstrated that the HEAVEN-I is an excellent optical source for direct laser-driven quasi-isentropic compression, even if it produces more temperature rise and entropy than the typical profile.
Bibliography:11-1959/O4
ZHANG Pin-Liang, TANG Xiu-Zhang, LI Ye-Jun, WANG Zhao, TIAN Bao-Xian, YIN Qian, LU Ze, XIANG Yi-Huai, GAO Zhi-Xing, LI Jing, HU Feng-Ming, GONG Zi-Zheng（ 1High Power Excimer Laser Laboratory, China Institute of Atomic Energy, Beijing 102413 2National Key Laboratory of Science and Technoiogy on ReIiabiiity and Environment Engineering, Beijing Institute of Spacecraft Environment Engineering, Beijing 100094）
The HEAVEN-I laser is used for direct drive quasi-isentropic compression up to -18 GPa in samples of aluminum without being temporal pulse shaped. The monotonically increasing loading is with a rise time over 17ns. The compression history is well reproduced by the ID radiation hydrodynamics simulation. We find that a small shock precursor where the backward integration method cannot process is formed at the beginning of illumination. We compare the loading process of HEAVEN-I with the typical profile （concave down, prefect pulse shape）, the results show that a typical profile can obtain more slowly rising and higher pressure, and the shock precursor has significant effects on temperature and entropy production. However, it is demonstrated that the HEAVEN-I is an excellent optical source for direct laser-driven quasi-isentropic compression, even if it produces more temperature rise and entropy than the typical profile.
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/32/7/075201