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Proceedings Paper

Geometric arrangement of laser beams in target area
Author(s): Jichun Tan; XiaoFeng Wei; Qin Zhong; Zhe Chen; Xiao Min Zhang; Lirong Liu; Ziquan Shi
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Paper Abstract

A ray tracing method for design of geometrical arrangement of laser beams in target area is described in this paper. A mathematically mode for path's design are suggested to minimize the objective functions fj(Ri, Li, (alpha) i, (beta) i), which are the optical length difference between the real path length from laser amplifier to the target center and the design objective path length. And the constraint conditions for beam's path are as follows: (1) Beams illuminate the cylindrical target with the incident angles required for the physical experiments. (2) 60 beams propagate without overlapping each other, and each of them with equal optical length from the laser amplifier to the target center. (3) Bema incident to the reflection mirror Pi with the decided angle (phi) i, for example, value of (phi) i is less than or equal to 45 degrees for all paths, and etc. Mathematical methods, such as 'Depth First Search technique', or searching optimum point for objective function fj(Ri, Li, (alpha) i, (beta) i) with constraint conditions are stated. Design examples are reported, in which the 60-Gaussian beam are symmetrically distributed around the target chamber.

Paper Details

Date Published: 23 July 1999
PDF: 5 pages
Proc. SPIE 3492, Third International Conference on Solid State Lasers for Application to Inertial Confinement Fusion, (23 July 1999); doi: 10.1117/12.354206
Show Author Affiliations
Jichun Tan, Changsha Institute of Technology (China)
XiaoFeng Wei, Southwest Institute of Nuclear Physics and Chemistry (China)
Qin Zhong, Changsha Institute of Technology (China)
Zhe Chen, Changsha Institute of Technology (China)
Xiao Min Zhang, Southwest Institute of Nuclear Physics and Chemistry (China)
Lirong Liu, Changsha Institute of Technology (China)
Ziquan Shi, Changsha Institute of Technology (China)


Published in SPIE Proceedings Vol. 3492:
Third International Conference on Solid State Lasers for Application to Inertial Confinement Fusion
W. Howard Lowdermilk, Editor(s)

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