Two-dimensional multi-lens array with circular aperture spherical lens forflat-top irradiation of inertial confinement fusion target

Citation
N. Nishi et al., Two-dimensional multi-lens array with circular aperture spherical lens forflat-top irradiation of inertial confinement fusion target, OPT REV, 7(3), 2000, pp. 216-220
Citations number
11
Language
INGLESE
art.tipo
Review
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Optics & Acoustics
Journal title
OPTICAL REVIEW
ISSN journal
1340-6000 → ACNP
Volume
7
Issue
3
Year of publication
2000
Pages
216 - 220
Database
ISI
SICI code
1340-6000(200005/06)7:3<216:TMAWCA>2.0.ZU;2-8
Abstract
A two-dimensional multi-lens array 350 mm in diameter with spherical elemen t lenses has been tested to improve the irradiation uniformity of a high po wer glass laser for inertial confinement fusion (ICF). A circular shape for the element lens aperture is chosen to eliminate azimuthally asymmetric in tensity distribution. An approximate hat-top intensity distribution is obta ined with a lens array of 37 lenses. Beam patterns of a coherent laser and partially coherent light (PCL) with the random phase plate (RPP) and the mu lti-lens array (MLA) are measured in a GEKKO XII glass laser system. Spheri cal mode structure of the irradiation nonuniformity of 5.6% with MLA is est imated with cos(3) theta distribution of absorption coefficient in the targ et plasma.