We are developing monolithic active pixel sensors, x-ray SOIPIXs based on a Silicon-On-Insulator CMOS technology. Its event trigger output function offers a high time resolution better than ~10 usec. (1) In 2022-23, we and evaluated large sensors, XRPIX-X, with a pixel array size of 14mm x 22mm. We report its design and the results of the performance evaluation. (2) We are developing "Digital X-ray SOIPIXs" for satellite use, featuring on-chip ADCs, DACs, and BGRs for noise robustness. An on-chip clock pattern generator is also included to simplify the readout digital circuits. (3) XRPIXs are increasingly being utilized in various scientific applications beyond x-ray astronomy, and a brief introduction will be provided.
We are developing x-ray Silicon-On-Insulator (SOI) pixel sensors, called "XRPIX" for the next generation x-ray astronomy satellites. The XRPIX has the unique function of event trigger and hit address outputs allowing us to read out signals only from the x-ray detected pixels. In order to use the XRPIX for the x-ray observatories, the sufficient time resolution is required to discriminate non x-ray events using the anti-coincidence method. For this method, a hit trigger of the XRPIX with a short delay and jitter time (~10μs) is required since the typical hitting rate of the high-energy background events on active shields is ~10kHz. Therefore, we have evaluated the trigger performance using the laser-generated pseudo-x-ray instead of x-ray sources. This allows us to easily control the timing, the position, and the energy of the hit events on the XRPIX. We estimated trigger's delay and jitter time to be ≲1μs. Here, we will report on the results of the trigger evaluation.
We have been developing monolithic active pixel sensors, X-ray SOIPIXs based on a Silicon-On-Insulator CMOS technology. Its event trigger output function offers a high time resolution better than ~10 usec. (1) We report the device structure optimized to achieve both low noise, a thick depletion layer, and to non-punch-through. (2) We succeeded in achieving an energy resolution of ~300 eV (FWHM) at 6 keV with a depletion layer of 300 um at room temperature by operating frequent reset to reduce the shot noise. (3) We present the development of "Digital X-ray SOIPIXs" having on-chip ADCs, DACs and readout sequencers.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.