Presentation Information
[3H10]Development of nanosecond pulsed laser decontamination method(II)Dependence of the behavior of micro/nano dusts and removal depth of target on laser parameters
Keisuke Yamamoto1, Atsushi Kosuge2, *Takashi Nakajima1 (1. Institute of Advanced Energy, Kyoto Univ., 2. JAEA (Tsuruga))
Keywords:
nanosecond pulsed laser,laser decontamination,radioactive dusts,laser scattering,velocity measurement
Laser decontamination was invented in the early 2000s, and in those days, a comparative studies of laser decontamination by low-repetition (several Hz to 20 Hz) Nd:YAG lasers and continuous-wave lasers. Due to the recent advent of cost-effective and robust fiber lasers, not only high-power continuous-wave fiber lasers but also high-power, high-repetition (1 kHz to several MHz) nanosecond fiber lasers are becoming popular tools. For some reason, high-power continuous-wave laser decontamination has been the mainstream in Japan, while pulsed laser decontamination is the mainstream overseas, and there is room for discussion as to whether this choice is correct. We believe that pulsed lasers are more suitable for decontamination, and at the Atomic Energy Society meeting last fall, we reported on their overview and an in-situ dust measurement method using laser scattering.
In this presentation, using SUS targets, we report on the progress in particle size and velocity evaluation of micro/nano dusts using laser scattering, and the laser parameter dependence of dust behavior and removal depth.
In this presentation, using SUS targets, we report on the progress in particle size and velocity evaluation of micro/nano dusts using laser scattering, and the laser parameter dependence of dust behavior and removal depth.