Paper 13093-251
Paper 13093-251
Performance improvement of Adiabatic Demagnetization Refrigerator for HUBS
On demand | Presented live 19 June 2024 
Abstract
The Hot Universe Baryon Surveyor (HUBS) is a proposed X-ray satellite project dedicated to addressing the “missing baryon problem”. Its payload incorporates transition-edge sensor (TES) microcalorimeters operating at sub-100 mK, making adiabatic demagnetization refrigerator (ADR) a key technology for the HUBS mission. Currently, we are in the process of improving the performance of a two-stage ADR prototype, mainly to increase the hold time at the operating temperature. We replace the previous chromium potassium alum (CPA) salt pill with a new ferric ammonium alum (FAA) salt pill containing more moles of crystals, as FAA has more cooling capacity than CPA per mole in the temperature range of interest. In this paper, we describe the performance improvement of the ADR prototype and present the test results.
Presenter
Chunyang Jiang
Tsinghua Univ. (China)
Chunyang Jiang is a Ph.D. candidate at the Department of Astronomy, Tsinghua University, working under the guidance of Prof. Wei Cui. His research interest includes the adiabatic demagnetization refrigerator for space- borne detection and the science of hot gas diffused throughout the universe.