Visualization of alpha rays using a qCMOS camera and evaluation of the effects of beta rays, gamma rays, and neutrons on its camera

Sagawa, Naoki; Morishita, Yuki   ; Fujisawa, Makoto; Kurosawa, Shunsuke*; Sasano, Makoto*; Hayashi, Masateru*

At nuclear facilities that handle plutonium, visualization of Pu particles in working environment is important for evaluating internal exposure doses for workers. In this study, a new type of Quantitative Complementary Metal Oxide Semiconductor (qCMOS) camera with low noise signals and high readout speed has been used in the alpha imaging system to improve the spatial resolution for alpha-rays and to visualize Pu particles. In addition, effects of irradiation on the system have been confirmed with various types of radiation. As a result, it was found that only alpha rays can be measured specifically by setting a threshold in terms of area, even if noise is generated, without the influence of beta rays, gamma rays, or neutrons.