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- Title
DIffuse X-ray Explorer: A High-Resolution X-ray Spectroscopic Sky Surveyor on the China Space Station.
- Authors
Jin, Hai; Mao, Junjie; Chen, Liubiao; Chen, Naihui; Cui, Wei; Gao, Bo; Li, Jinjin; Li, Xinfeng; Liu, Jiejia; Quan, Jia; Jiang, Chunyang; Wang, Guole; Wang, Le; Wang, Qian; Wang, Sifan; Xiao, Aimin; Zhang, Shuo
- Abstract
DIffuse X-ray Explorer (DIXE) is a proposed high-resolution X-ray spectroscopic sky surveyor on the China Space Station (CSS). DIXE will focus on studying hot baryons in the Milky Way. Galactic hot baryons like the X-ray emitting Milky Way halo and eROSITA bubbles are best observed in the sky survey mode with a large field of view. DIXE will take advantage of the orbital motion of the CSS to scan a large fraction of the sky. High-resolution X-ray spectroscopy, enabled by superconducting microcalorimeters based on the transition-edge sensor technology, will probe the physical properties (e.g., temperature, density, elemental abundances, kinematics) of the galactic hot baryons. This will complement the high-resolution imaging data obtained with the eROSITA mission. Here we present the preliminary design of DIXE. The payload consists mainly of a detector assembly and a cryogenic cooling system. The key components of the detector assembly are a microcalorimeter array and frequency-domain multiplexing readout electronics. To provide a working temperature for the detector assembly, the cooling system consists of an adiabatic demagnetization refrigerator and a mechanical cryocooler system.
- Subjects
SPACE stations; X-rays; MILKY Way; X-ray spectroscopy; ASTRONOMICAL surveys; SUPERCONDUCTING transitions; GALACTIC halos
- Publication
Journal of Low Temperature Physics, 2024, Vol 215, Issue 3/4, p256
- ISSN
0022-2291
- Publication type
Article
- DOI
10.1007/s10909-024-03095-0