npsm 새물리 New Physics : Sae Mulli

pISSN 0374-4914 eISSN 2289-0041


Research Paper

New Phys.: Sae Mulli 2018; 68: 348-352

Published online March 30, 2018

Copyright © New Physics: Sae Mulli.

Development of a Portable Radiation Detector Using a Scintillator

Chan-Woo PARK, Hong-Joo KIM*

Department of Physics, Kyungpook National University, Daegu 41566, Korea


Received: December 15, 2017; Revised: February 5, 2018; Accepted: February 8, 2018

This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.


Portable radiation detectors are commonly used as real-time radiation monitors and personal radiation dosimeters. In this research, we have developed a portable radiation detector by using a light to frequency photosensor. This detector is constructed with only a MCU (micro-controller unit) and a sensor, which makes it more compact and portable than a conventional detector with an ADC chip and a circuit board. We used a photosensor called TSL238 that converts light intensity to digital frequency signals. We choose the raspberryPi, which is used to count frequency as the MCU. A raspberryPi is a small computer and has a wireless internet port so that we can control detector and acquire data remotely. We tested CsI, CsI(Tl), NaI crystals in order to find a better scintillator. We also tested the linearity of the detector by using X-rays produced by an X-ray generator, which we controlled by using the current and the voltage. We measured the X-ray energy by using a survey meter.

Keywords: Photosensor, Dosimeter, Scintillator

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