Paper 13093-228
Initial operations of the Soft X-ray Imager onboard XRISM
Abstract
XRISM (X-Ray Imaging and Spectroscopy Mission) is an astronomical satellite with the capability of highresolution spectroscopy with the X-ray microcalorimeter, Resolve, and wide field-of-view imaging with the CCD camera, Xtend. The Xtend consists of the mirror assembly (XMA: X-ray Mirror Assembly) and detector (SXI: Soft X-ray Imager). The components of SXI include CCDs, analog and digital electronics, and a mechanical cooler. After the successful launch on September 6th, 2023 (UT) and subsequent critical operations, the mission instruments were turned on and set up. The CCDs have been kept at the designed operating temperature of −110°C after the electronics and cooling system were successfully set up. During the initial operation phase, which continued for more than a month after the critical operations, we verified the observation procedure, stability of the cooling system, all the observation options with different imaging areas and/or timing resolutions, and operations for protection against South Atlantic Anomaly. We optimized the operation procedure and observation parameters including the cooler settings, imaging areas for the specific modes with higher timing resolutions, and event selection algorithm. We summarize our policy and procedure of the initial operations for SXI. We also report on a couple of issues we faced during the initial operations and lessons learned from them.
Presenter
Hiromasa Suzuki
Japan Aerospace Exploration Agency (Japan)
Assistant Professor, Japan Aerospace Exploration Agency, September 2023-
RESEARCH EXPERIENCE
JSPS Postdoctoral program
Konan University, Japan April 2021- August 2023
JSPS research fellowship for young scientists April 2019-2021
Visiting scientist at the Center for Astrophysics | Harvard & Smithsonian, USA August 2019-December 2019
Research Assistant 2016-2018
The University of Tokyo, Japan
EDUCATION
Ph.D. in Science March 2021
The University of Tokyo, Japan
Dissertation title: “Systematic Study of Escape Processes of Cosmic Rays from Supernova Remnants based on Gamma-ray and Thermal X-ray Properties”
Master’s degree in Science March 2018
The University of Tokyo, Japan
Dissertation title: “Estimation of non-X-ray background in orbit with Hitomi hard X-ray imagers”
Bachelor in Science March 2016
The University of Tokyo, Japan