PoS - Proceedings of Science
Volume 420 - 10th International Workshop on Semiconductor Pixel Detectors for Particles and Imaging (Pixel2022) - Medical Imaging, CCDs, Detectors for IR, and Direct Electron Detection
Simulation Study of Pulse Height Difference Between Pixel Patterns of X-ray CCDs Onboard the XRISM Satellite
Y. Aoki*, Y. Ito, M. Nobukawa, Y. Kanemaru, K. Miyazaki, K. Kusunoki, K. Mori, T. Yoneyama, T. Tamba, H. Tomida, H. Nakajima, H. Matsumoto, H. Noda, K. Hayashida, H. Uchida, T. Tanaka, H. Suzuki, T. Yoshida, H. Murakami, M. Yamauchi, I. Hatsukade, K. Hagino, T. Kohmura, H. Uchiyama, K. Yamaoka, M. Ozaki, T. Dotani, H. Tsunemi, K. Nobukawa, T. Tsuru, S. Kobayashi and J. Hiragaet al. (click to show)
Full text: pdf
Pre-published on: March 16, 2023
Published on: May 08, 2023
We have developed a soft X-ray telescope system Xtend onboard Japan’s new X-ray astronomical satellite XRISM. Xtend employs X-ray CCDs, which have basically the same design as those used in the previous X-ray astronomical satellite Hitomi. Monochromatic X-ray line spectra of the CCDs onboard Hitomi showed offsets of centroids between different pixel patterns or different good grades; the spectral centroids of charge-sharing events are higher than those of single-pixel events. The spectral offset, which we call “Goffset”, can cause large uncertainties in X-ray energy determination accuracy. In this paper, confirming the CCDs onboard XRISM also have Goffset, we performed a simulation study that takes into account the two factors; charge sharing and readout noise. Goffset of the flight model CCD is successfully reproduced by the simulation with a certain readout noise. We investigate how charge sharing and readout noise cause Goffset based on the simulation results.
DOI: https://doi.org/10.22323/1.420.0036
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.