The following email has been sent to MATSUMURA, Hideaki:
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Dear Hideaki Matsumura,
The submission of your abstract has been successfully processed.
Abstract submitted: https://indico.cern.ch/event/192695/call-for- abstracts/my-abstracts.
Status of your abstract: https://indico.cern.ch/event/192695/call- for-abstracts/292/.
See below a detailed summary of your submitted abstract:
Conference: Tipp 2014 - Third International Conference on Technology and Instrumentation in Particle Physics
Submitted by: MATSUMURA, Hideaki
Submitted on: 27 February 2014 09:41
Title: Development of X-ray SOI Pixel Sensors: Investigation of Charge-Collection Efficiency
Abstract content We have been developing X-ray SOIPIXs, monolithic active pixel sensors based on the Silicon-On-Insulator (SOI) CMOS technology for next-generation X-ray astronomy satellites. Their high time resolution (~micro sec) and event trigger output function enable us to reduce non-X-ray background by two orders of magnitude at 20 keV, compared with X-ray CCDs widely used in current X-ray astronomy sattelites. A fully depleted thick depletion layer with back-side illumination offers wide band coverage of ∼0.3–40 keV. We already achieved thick and full depletion layer with a thickness of 500 micron. We will report recent progress in our development in this presentation. We measured sub-pixel charge-collection efficiency of our device by irradiating it with pencil beam X-rays at SPring-8. We found that a part of signal charges is lost at the pixel boundaries. We found that the amount of the charge loss depends on back-bias voltages. It leads us to a hypothesis that the strength of electric fields at the interface between the sensor and silicon dioxide layers determines the charge collection efficiency. We will test the hypothesis by comparing the experimental results with TCAD simulations.
Summary
Primary Authors: MATSUMURA, Hideaki (Kyoto University) matumura@cr.scphys.kyoto-u.ac.jp
Co-authors: TSURU, Takeshi (Kyoto University) tsuru@cr.scphys.kyoto-u.ac.jp Dr. TANAKA, Takaaki (Kyoto University) ttanaka@cr.scphys.kyoto-u.ac.jp Dr. NAKASHIMA, Shinya (Kyoto University) shinya@cr.scphys.kyoto-u.ac.jp ARAI, Yasuo (High Energy Accelerator Research Organization (JP)) yasuo.arai@kek.jp TAKEDA, Ayaki (SOKENDAI) atakeda@post.kek.jp MORI, Koji (University of Miyazaki) mori@astro.miyazaki-u.ac.jp NISHIOKA, Yusuke (University of Miyazaki) nishioka613@cc.miyazaki-u.ac.jp TAKENAKA, Ryota (University of Miyazaki) takenaka@astro.miyazaki-u.ac.jp KOHMURA, Takayoshi (Kogakuin University) tkohmura@map.kogakuin.ac.jp
Abstract presenters: MATSUMURA, Hideaki
Track classification: Experiments: 2b) Astrophysics and Space Instrumentation
Presentation type: Oral
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