1. Diffuse X-ray Explorer: a high-resolution X-ray spectroscopic sky surveyor on the China Space Station
- Author
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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, and Zhang, Shuo
- Subjects
Astrophysics - Instrumentation and Methods for Astrophysics ,Astrophysics - High Energy Astrophysical Phenomena - 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 (TES) 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., Comment: 12 pages, 6 figures, the full version is published by Journal of Low Temperature Physics
- Published
- 2024