Single crystal diamond x-ray image sensor with photon-charge counting ROIC

Toru Aoki; Kohei Toyoda; Koji Koyama; Seong-Woo Kim; Junichi Nishizawa; Kento Tabata; Hiroki Kase; Katsuyuki Takagi; Keitaro Hitomi

doi:10.1117/12.2681853

4 October 2023 Single crystal diamond x-ray image sensor with photon-charge counting ROIC

Toru Aoki, Kohei Toyoda, Koji Koyama, Seong-Woo Kim, Junichi Nishizawa, Kento Tabata, Hiroki Kase, Katsuyuki Takagi, Keitaro Hitomi

Author Affiliations +

Proceedings Volume PC12696, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXV; PC1269608 (2023) https://doi.org/10.1117/12.2681853
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Abstract

We have reported on the growth of single-crystal diamond and its application to radiation detectors. This time, we report on the measurement of an imager with a photon-charge counting read out integrated circuit (ROIC) connected to a single-crystal diamond. The single crystal diamond was 3.0 x 3.0mm x 0.5mm thick. The bump connection area of our test ROIC is a 3.2mm x 3.2mm area with 40 x 40 pixels pads with 80µm pitch. Silver-based bumps were formed on short-crystal diamond using a super inkjet printer and bumped to the ROIC using flip chip bonders. The imaging experiment was conducted by irradiating X-rays at 90 kV and 0.2 mA at 30cm distance. The results showed that the X-ray transmission image with a clear contrast between the area shielded by 2 mm thick lead and the unshielded area was captured, demonstrating a prototype single-crystal diamond-type X-ray imager.

Conference Presentation

Citation Download Citation

Toru Aoki, Kohei Toyoda, Koji Koyama, Seong-Woo Kim, Junichi Nishizawa, Kento Tabata, Hiroki Kase, Katsuyuki Takagi, and Keitaro Hitomi "Single crystal diamond x-ray image sensor with photon-charge counting ROIC", Proc. SPIE PC12696, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXV, PC1269608 (4 October 2023); https://doi.org/10.1117/12.2681853

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