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Initial study and design on ignition ellipraum

Published online by Cambridge University Press:  20 March 2012

Ke Lan ,
Dongxian Lai ,
Yiqing Zhao  and
Xin Li
Ke Lan*
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
Yiqing Zhao
Affiliation:
Institute of Applied Physics and Computational Mathematics, Beijing, People's Republic of China
Xin Li
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: [email protected]
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Abstract

An initial study and design on ignition elliptical hohlraum (ellipraum) is given by using the expended plasma-filling model with criterions. As a result, in an ellipraum with a smaller ratio of major-to-minor axis (a/b), the radius ratio of ellipraum-to-capsule (b/RC) should be larger (hence more sphere-like) to meet the criterions of plasma-filling and laser deposition, meanwhile the required laser energy and peak power are lower and the coupling between different modes is weaker. To produce a 300 eV radiation pulse to ignite a capsule of 1 mm radius, an ellipraum of a/b = 1.6 and b/Rc = 2.8 is superior to a cylinraum with a length-to-diameter ratio of 1.81 and a cylinraum-to-capsule radius ratio of 2.54 in saving more than 10% laser energy and reducing 50% coupling between different modes.

Keywords

Elliptical hohlraumInertial fusionPlasma filling
Type
Research Article
Information
Laser and Particle Beams , Volume 30 , Issue 2 , June 2012 , pp. 175 - 182
Copyright
Copyright © Cambridge University Press 2012

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