Laser and Particle Beams

Table of Contents - June 2012 - Volume 30, Issue 02  

Research Article

Initial study and design on ignition ellipraum

Ke Lana1 c1, Dongxian Laia1, Yiqing Zhaoa1 and Xin Lia1

a1 Institute of Applied Physics and Computational Mathematics, Beijing, People's Republic of China

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.

(Received November 01 2011)

(Accepted November 17 2011)

Keywords

  • Elliptical hohlraum;
  • Inertial fusion;
  • Plasma filling

Correspondence:

c1 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@yahoo.com

Related Content