Multiwedge array for uniform target irradiation

Masaru Iwasaki; Takahisa Jitsuno; Noriaki Nishi; Shinji Motokoshi; Masahiro Nakatsuka

doi:10.1117/12.375134

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11 January 2000 Multiwedge array for uniform target irradiation

Masaru Iwasaki, Takahisa Jitsuno, Noriaki Nishi, Shinji Motokoshi, Masahiro Nakatsuka

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Proceedings Volume 3886, High-Power Lasers in Energy Engineering; (2000) https://doi.org/10.1117/12.375134
Event: Advanced High-Power Lasers and Applications, 1999, Osaka, Japan

Abstract

The effectiveness of multi-wedge plates array for the improvement of the laser irradiation uniformity on the pellet target in inertial confinement fusion has been investigated. A multi-wedge plates array of 90-mm in diameter was fabricated with wedge plates of 7 pairs, which ad a size of 30-mm diameter and a wedge angle of about 0.1 degrees. Also, to prevent the diffraction caused by each wedge plates, a soft aperture with the transmission profile of 16th super gaussian was designed and fabricated. As the result, it was confirmed that the array decreased the low- mode uniformity and is able to control the beam profile.

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Masaru Iwasaki, Takahisa Jitsuno, Noriaki Nishi, Shinji Motokoshi, and Masahiro Nakatsuka "Multiwedge array for uniform target irradiation", Proc. SPIE 3886, High-Power Lasers in Energy Engineering, (11 January 2000); https://doi.org/10.1117/12.375134

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