Sep 12 – 17, 2021
University of Birmingham
Europe/London timezone

X-ray/Neutron Flat-Panel Detector using LCD Technology (in-person)

Sep 17, 2021, 9:10 AM



Mr Mohammad Hamdan (The University of Tokyo)


In this study, we present the results of our evaluation of a newly created flat panel detector. We have adapted the liquid crystal display technology to create an array of thin-film transistors and photodiodes, which can be used for flat-panel detector for radiation imaging. Our prototype flat-panel detector has a pixel size of 50 μm square and 252 x 256 pixels. By combining this panel with a scintillator, we implemented a flat panel detector for X-rays and neutrons. The scintillator was ZnS/LiF with a thickness of 0.4 mm. First, we evaluated the spatial resolution of the flat-panel detector using X-ray. The X-ray tube voltage was set to 30-160 kV and the tube current to 3 mA. The time for total area scanning were 227 ms, and we repeated 1000 times for averaging the images. The spatial resolution was measured up to 2.5 LP/mm. Secondly, we evaluated the flat-panel detector using neutron beam in Japan Proton Accelerator Research Complex (J-PARC) MLF BL-10. The neutron intensity at BL-10 was $4.8×10^7 n/s/cm^2$ with neutron energies below 0.4 eV at the sample position. The total-area scanning was repeated 1000 times and images were integrated as in the case of X-rays. As a result, the images were successfully obtained for the neutron beam as well. We evaluated the spatial resolution using a Gd resolution gauge. As a result, 0.2 mm pitch (2.5 LP/mm) strips could be discriminated, and the spatial resolution was comparable to that of the X-ray cases.

Institute The University of Tokyo
Title Mr
Nationality Indonesia
Your name Mohammad Hamdan

Primary author

Mr Mohammad Hamdan (The University of Tokyo)


Dr Yutaka Otaka Dr Yuki Mitsuya (The University of Tokyo) Dr Kenji Shimazoe (The University of Tokyo) Prof. Hiroyuki Takahashi (The University of Tokyo) Takanori Tsunashima (Device Development Department, R&D Division, Japan Display Inc.) Atsunori Ooyama (Device Development Department, R & D Division, Japan Display Inc.) Marina Mochizuki (Device Development Department, R & D Division, Japan Display Inc.) Isao Suzumura (Device Development Department, R & D Division, Japan Display Inc.) Tomoyuki Ito (Device Development Department, R & D Division, Japan Display Inc.)

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