[1A06-13] Contamination Measurement Techniques

4:30 PM - 4:45 PM JST(7:30 AM - 7:45 AM UTC)

[1A13] Development of a remote alpha/beta detection system and analysis method for alpha/beta classification

*YUKI Morishita¹, hiroko miyamura¹, yuki sato¹, jun matsubara², yasue mitsukura² (1. JAEA, 2. Keio University)

Keywords:

alpha / beta detector,robot,support vector machine

The detection of alpha/beta contamination using remote equipment is important at decommissioning sites. Therefore, we developed an alpha/beta detector using a stilbene scintillator and a small silicon photomultiplier tube (SiPM), and the detector was combined with a small robot (Light Rover, Vstone Corp.). Output voltage waveforms from the detector were acquired by a digitizer (DT5730, CAEN Inc.). 241Am (alpha), 90Sr-90Y (beta), and thorium (alpha and beta) sources were measured respectively for evaluation. A support vector machine (SVM) was used for the classification of alpha and beta particles. We confirmed that the detectors combined with the robot can measure and classify alpha/beta particles. The classification accuracy was higher than the conventional method of using tail to total integral.