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Study on Au + U + Au sandwich Hohlraum wall for ignition targets

Published online by Cambridge University Press:  21 January 2010

Xin Li ,
Ke Lan ,
Xujun Meng ,
Xiantu He ,
Dongxian Lai  and
Tinggui Feng
Xin Li
Affiliation:
Institute of Applied Physics and Computational Mathematics, Beijing, People's Republic of China
Ke Lan*
Affiliation:
Institute of Applied Physics and Computational Mathematics, Beijing, People's Republic of China
Xujun Meng
Affiliation:
Institute of Applied Physics and Computational Mathematics, Beijing, People's Republic of China
Xiantu He
Affiliation:
Institute of Applied Physics and Computational Mathematics, Beijing, People's Republic of China
Dongxian Lai
Affiliation:
Institute of Applied Physics and Computational Mathematics, Beijing, People's Republic of China
Tinggui Feng
Affiliation:
Institute of Applied Physics and Computational Mathematics, Beijing, People's Republic of China
*
Address correspondence and reprint requests to: Ke Lan, Institute of Applied Physics and Computational Mathematics, P.O. Box 8009-14 Beijing, 100088, People's Republic of China. E-mail: ke.lan68@gmail.com
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Abstract

In ignition targets designs, U or U based cocktail hohlraum are usually used because the Rosseland mean opacity of U is higher than for Au at the radiation temperature for ignition. However, it should be noted that the opacity of U is obviously lower than for Au when the radiation temperature falls into a low temperature region. Because the depth penetrated by radiation is only several micrometers under a 300eV drive, and also because there is a prepulse longer than 10 ns prepulse at temperatures lower than 170 eV in the radiation drive of ignition target designs. Therefore we propose an Au + U + Au sandwich hohlraum for ignition targets in this work. Compared to the cocktail, the sandwich not only remarkably simplifies the fabrication and uses less depleted U material, but also increases the albedo during the prepulse.

Keywords

Heat waveInertial fusionOpacitySandwich hohlraum
Type
Research Article
Information
Laser and Particle Beams , Volume 28 , Issue 1 , March 2010 , pp. 75 - 81
Copyright
Copyright © Cambridge University Press 2010

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