Sato Masaya, Kajita Shin, Yasuhara Ryo, Ohno Noriyasu, Tokitani Masayuki, Yoshida Naoaki, Tawara Yuzuru
Department of Engineering and Science, Nagoya University, Nagoya, Aichi, 464-8603, Japan.
Opt Express. 2013 Apr 22;21(8):9333-42. doi: 10.1364/OE.21.009333.
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.
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。
