MeV astrophysical spectroscopic surveyor (MASS): a compton telescope mission concept

Jiahuan Zhu, Xutao Zheng, Hua Feng*, Ming Zeng, Chien You Huang, Jr Yue Hsiang, Hsiang Kuang Chang, Hong Li, Hao Chang, Xiaofan Pan, Ge Ma, Qiong Wu, Yulan Li, Xuening Bai, Mingyu Ge, Long Ji, Jian Li, Yangping Shen, Wei Wang, Xilu WangBinbin Zhang, Jin Zhang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

We propose a future mission concept, the MeV Astrophysical Spectroscopic Surveyor (MASS), which is a large area Compton telescope using 3D position sensitive cadmium zinc telluride (CZT) detectors optimized for emission line detection. The payload consists of two layers of CZT detectors in a misaligned chessboard layout, with a total geometric area of 4096 cm2 for on-axis observations. The detectors can be operated at room-temperature with an energy resolution of 0.6% at 0.662 MeV. The in-orbit background is estimated with a mass model. At energies around 1 MeV, a line sensitivity of about 10-5 photons cm-2 s-1 can be obtained with a 1 Ms observation. The main science objectives of MASS include nucleosynthesis in astrophysics and high energy astrophysics related to compact objects and transient sources. The payload CZT detectors weigh roughly 40 kg, suggesting that it can be integrated into a micro- or mini-satellite. We have constructed a pathfinder, named as MASS-Cube, to have a direct test of the technique with 4 detector units in space in the near future.

Original languageEnglish
Article number2
JournalExperimental Astronomy
Volume57
Issue number1
DOIs
Publication statusPublished - Feb 2024

Keywords

  • Compact objects
  • Compton telescope
  • Gamma-ray
  • Nuclear astrophysics
  • Nucleosynthesis

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