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

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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 cm\(^2\) 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.

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Availability of data and materials

Data sets generated during the current study are available from the corresponding author on reasonable request.

Notes

  1. https://www.redlen.com/

  2. https://www.caen.it/

  3. https://geant4.web.cern.ch

  4. Obtained from SPENVIS (https://www.spenvis.oma.be).

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Acknowledgements

HF acknowledges funding support from the National Natural Science Foundation of China under grants Nos. 12025301, 12103027, & 11821303, the National Key R &D Project under grant 2018YFA0404502, and the Tsinghua University Initiative Scientific Research Program.

Funding

This work was supported by the National Natural Science Foundation of China under grants Nos. 12025301, 12103027, & 11821303, the National Key R &D Project under grant 2018YFA0404502, and the Tsinghua University Initiative Scientific Research Program.

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  1. Jiahuan Zhu and Xutao Zheng These authors are equally contributed to this work.

Authors and Affiliations

  1. Department of Astronomy, Tsinghua University, Beijing, 100084, China

    Jiahuan Zhu, Hua Feng, Hong Li & Qiong Wu

  2. Department of Engineering Physics, Tsinghua University, Beijing, 100084, China

    Xutao Zheng, Ming Zeng, Hao Chang, Xiaofan Pan, Ge Ma & Yulan Li

  3. Institute of Astronomy, National Tsing Hua University, Hsinchu, 300044, Taiwan

    Chien-You Huang, Jr-Yue Hsiang & Hsiang-Kuang Chang

  4. Institute for Advanced Study, Tsinghua University, Beijing, 100084, China

    Xuening Bai

  5. Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Beijing, 100049, China

    Hua Feng, Mingyu Ge & Xilu Wang

  6. School of Physics and Astronomy, Sun Yat-Sen University, Zhuhai, 519082, China

    Long Ji

  7. Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, 230026, China

    Jian Li

  8. China Institute of Atomic Energy, Beijing, 102413, China

    Yangping Shen

  9. School of Physics and Technology, Wuhan University, Wuhan, 430072, China

    Wei Wang

  10. School of Astronomy and Space Science, Nanjing University, Nanjing, 210093, China

    Binbin Zhang

  11. Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, Nanjing, 210093, China

    Binbin Zhang

  12. Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, 210023, China

    Binbin Zhang

  13. School of Physics, Beijing Institute of Technology, Beijing, 100081, China

    Jin Zhang

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  1. Jiahuan Zhu
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Contributions

HF and MZ led the project, with a focus on science and instrumentation, respectively. J Zhu, CYH, JYH, HKC, and HL performed the simulations. XZ, HC, XP, GM, QW, and YL contributed to the development of the payload instrument. XB, MG, LJ, JL, YS, WW, XW, BZ, and J Zhang participated in the discussions of the science objectives.

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Correspondence to Hua Feng.

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Zhu, J., Zheng, X., Feng, H. et al. MeV astrophysical spectroscopic surveyor (MASS): a compton telescope mission concept. Exp Astron 57, 2 (2024). https://doi.org/10.1007/s10686-024-09920-4

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