Paper 13093-234
Paper 13093-234
Strategies for the in-orbit gain tracking using the modulated x-ray sources for the Resolve microcalorimeter spectrometer on XRISM
19 June 2024 • 17:30 - 19:00 Japan Standard Time | Room G5, North - 1F
Abstract
Accurate and precise gain drift correction is the key to achieve the required energy resolution of the Resolve spectrometer on the X-Ray Imaging and Spectroscopy Mission (XRISM). Modulated X-ray sources (MXS) will be used for monitoring the in-orbit gain drift. However, complexities with both the MXS characteristics and the on-board pulse processing make optimization of the MXS setting challenging.
The MXS count rate model has been established using measurements in the spacecraft thermal vacuum test with the flight detector and MXS, which enabled us to choose a few optimal settings for the continuous operation of the MXS and to design and implement an alternative gain tracking approach called the intermittent operation.
In this presentation, we will report the strategies for the in-orbit gain tracking using the MXS.
Presenter
Rikkyo Univ. (Japan)
Makoto Sawada is an assistant professor at Rikkyo University. He received his BA, MD, and PhD degrees in science from Kyoto University in 2007, 2009, and 2012, respectively. In the XRISM project, he is a development team member for the Resolve instrument and the co-lead of the in-flight calibration planning team. He has been contributing to the development of microcalorimeter spectrometer systems on Hitomi and XRISM for over a decade. His research interest includes observational studies of collisional non-equilibrium plasma in hot objects such as supernova remnants and laboratory astrophysics experiments to simulate emission from non-equilibrium plasma using an electron bean ion trap.