Pre- and post-launch operation of the soft x-ray spectrometer Resolve on board the XRISM satellite

Resolve onboard the XRISM (X-Ray Imaging and Spectroscopy Mission) is an X-ray microcalorimeter detector being developed in Japan, the United States, and Europe. The XRISM satellite was launched on September 7, 2023, from the Tanegashima Space Center. Resolve fully met the energy spectral performance requirement (7 eV@6 keV) both on the ground and in orbit, and was confirmed to have the same performance as the SXS onboard the ASTRO-H (Hitomi) satellite. The Resolve is operated at a low temperature of 50 mK to achieve the required energy resolution with a cooling system to satisfy the lifetime requirement of over 3 years. We will report on the details of the series of pre-launch and post-launch operations during the critical phase to work the cooling chain.