用于汤姆逊散射系统的金属镜多脉冲激光损伤阈值评估。

Assessment of multi-pulse laser-induced damage threshold of metallic mirrors for Thomson scattering system.

作者信息

Sato Masaya, Kajita Shin, Yasuhara Ryo, Ohno Noriyasu, Tokitani Masayuki, Yoshida Naoaki, Tawara Yuzuru

机构信息

Department of Engineering and Science, Nagoya University, Nagoya, Aichi, 464-8603, Japan.

出版信息

Opt Express. 2013 Apr 22;21(8):9333-42. doi: 10.1364/OE.21.009333.

DOI:10.1364/OE.21.009333

PMID:23609644

Abstract

Multi-pulse laser-induced damage threshold (LIDT) was experimentally investigated up to ~10(6) pulses for Cu, Ag mirrors. The surface roughness and the hardness dependence on the LIDT were also examined. The LIDT of OFHC-Cu decreased with the pulse number and was 1.0 J/cm(2) at 1.8 × 10(6) pulses. The expected LIDT of cutting Ag at 10(7) pulses was the highest; Ag mirror would be one of the best choices for ITER Thomson scattering system. For the roughness and hardness, material dependences of LIDT are discussed with experimental results.

摘要

对铜、银镜进行了多脉冲激光诱导损伤阈值（LIDT）的实验研究，脉冲数高达约10⁶次。还研究了表面粗糙度和硬度对LIDT的依赖性。无氧高导电率铜（OFHC-Cu）的LIDT随脉冲数减少，在1.8×10⁶次脉冲时为1.0 J/cm²。预计在10⁷次脉冲时切割银的LIDT最高；银镜将是国际热核聚变实验堆（ITER）汤姆逊散射系统的最佳选择之一。对于粗糙度和硬度，结合实验结果讨论了LIDT的材料依赖性。