[1G07-09] Laser

[1G09] High scanning speed High power density Laser irradiation point temperature and complete decontamination

Decontamination process with high-intensity single-mode fiber laser and high-speed galvano scanner

*Eisuke John Minehara¹, Atsushi Kosuge², Naoyuki Kisohara², Akihiko Tsuboi² (1. LDD, 2. JAEA)

Keywords:High scanning speed , High power density , Laser irradiation point temperature , complete decontamination, sublimation

We have already been confirmed that various kinds of the actual contaminants have been completely decontaminated with over these ten years by using the high-intensity single-mode fiber laser and the high-speed galvano scanner. Here, we performed to simulate and to measure the irradiation point temperature, in order to understand the decontamination process by using the high-intensity laser and high-speed scanner. Though the temperature of the entire sample is several tens of degrees, the irradiation point always reaches tens of thousands of degrees. The irradiation point is sublimated together with the sample material and RI contaminants to realize the complete decontamination. The conditions and process of this decontamination will be clarified and reported here.