Angle-resolved scatter measurements of laser damaged DKDP crystals using a bi-directional scatter diagnostics

被引：2

作者：

Fluck, R ^{[1
]}

Wegner, P ^{[1
]}

Sheehan, L ^{[1
]}

Hackel, LA ^{[1
]}

机构：

[1] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

来源：

LASER-INDUCED DAMAGE IN OPTICAL MATERIALS: 2000, PROCEEDINGS | 2001年 / 4347卷

关键词：

optical scattering; photometry; DKDP;

D O I：

10.1117/12.425048

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We built a bi-directional scatter diagnostic to measure and quantify losses due to scattering and absorption in harmonic generation crystals (DKDP) for the National Ignition Facility. The diagnostic performs angle-resolved photometry at 351 nm, and is capable of both near-specular transmission and large angle scatter measurements. In the near-specular configuration, the transmission can be measured with variable acceptance angle ranging from +/-65 mu rad up to +/-60 mrad. A silicon photo detector and a scientific-grade CCD camera quantify total energy and energy distribution. A linear swing arm detection system enables large angle scatter measurements of 360 degrees, in principal, with step sizes as small as 0.01 degrees and variable collection angle ranging from 1 to 20 mrad. The design of this instrument and its application to the measurement of optical scatter from laser damage and final finishing process of DKDP are discussed.

引用

页码：423 / 431

页数：9