| Autor: |
Toshiyuki Takagi, Tsuyoshi Terao, Akifumi Koike, Toru Aoki, Kento Tabata, Hisashi Morii, Mitsuhiro Nogami, Kohei Toyoda, Keitaro Hitomi, Hiroki Kase, Katsuyuk Takagi |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXIII. |
| DOI: |
10.1117/12.2596374 |
| Popis: |
This study demonstrates a result of polarization effect of an X-ray imager that uses TlBr detectors with silver small electrodes. Although TlBr detectors are suitable for X-ray imaging applications because of the associated large attenuation coefficients and direct conversion behavior, realizing a flat-panel detector with TlBr involves developing processes. The demonstrated imager is constructed utilizing a combination of existing technologies; it comprises a plate electrode containing thallium metal to suppress the polarization phenomenon, pixelated silver electrodes with 80 µm pitch, and a photon-counting-type readout integrated circuit that can work in the hole as well as electron collection modes. As a result, it was reconfirmed that the polarization phenomenon is a serious problem for small electrodes as well as for large electrodes. In addition, the polarization could have accelerated by high X-rays flux. This result can motivate the development of polarization-tolerant small electrodes for TlBr detectors. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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