title: Assessment of multi-pulse laser-induced damage threshold of metallic mirrors for Thomson scattering system.
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.
authors.affiliation: Department of Engineering and Science, Nagoya University, Nagoya, Aichi, 464-8603, Japan. sato-masaya11@ees.nagoya-u.ac.jp
authors.forename: Masaya
authors.initials: M
authors.lastname: Sato
authors.forename: Shin
authors.initials: S
authors.lastname: Kajita
authors.forename: Ryo
authors.initials: R
authors.lastname: Yasuhara
authors.forename: Noriyasu
authors.initials: N
authors.lastname: Ohno
authors.forename: Masayuki
authors.initials: M
authors.lastname: Tokitani
authors.forename: Naoaki
authors.initials: N
authors.lastname: Yoshida
authors.forename: Yuzuru
authors.initials: Y
authors.lastname: Tawara
mesh_terms: D004867:Equipment Design; D004868:Equipment Failure; D019544:Equipment Failure Analysis; D007834:Lasers; D007909:Lenses; D008670:Metals / Q000528:radiation effects*; D011829:Radiation Dosage; D012031:Refractometry / Q000295:instrumentation*
chemical_list: D008670:Metals