Simulation study of performance of the Very Large Area gamma-ray Space Telescope
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arXiv
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| Auteurs principaux: | , , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866912008068136960 |
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| author | Pan, Xu Jiang, Wei Yue, Chuan Lei, Shi-Jun Cui, Yu-Xin Yuan, Qiang |
| author_facet | Pan, Xu Jiang, Wei Yue, Chuan Lei, Shi-Jun Cui, Yu-Xin Yuan, Qiang |
| contents | The Very Large Area gamma-ray Space Telescope (VLAST) is a mission concept proposed to detect gamma-ray photons through both the Compton scattering and electron-positron pair production mechanisms, enabling the detection of photons with energies ranging from MeV to TeV. This project aims to conduct a comprehensive survey of the gamma-ray sky from a low Earth orbit using an anti-coincidence detector, a tracker detector that also serves as a low energy calorimeter, and a high energy imaging calorimeter. We developed a Monte Carlo simulation application of the detector with the GEANT4 toolkit to evaluate the instrument performance including the effective area, angular resolution and energy resolution, as well as explored specific optimizations of the detector configuration. Our simulation-based analysis indicates that the VLAST's current design is physically feasible, with an acceptance larger than 10~$\rm m^2\ sr$ which is four times larger than Fermi-LAT, an energy resolution better than 2\% at 10~GeV, and an angular resolution better than 0.2 degrees at 10~GeV. The VLAST project is expected to make significant contribution to the field of gamma-ray astronomy and to enhance our understanding of the cosmos. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_16973 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Simulation study of performance of the Very Large Area gamma-ray Space Telescope Pan, Xu Jiang, Wei Yue, Chuan Lei, Shi-Jun Cui, Yu-Xin Yuan, Qiang Instrumentation and Methods for Astrophysics High Energy Astrophysical Phenomena High Energy Physics - Experiment High Energy Physics - Phenomenology Instrumentation and Detectors The Very Large Area gamma-ray Space Telescope (VLAST) is a mission concept proposed to detect gamma-ray photons through both the Compton scattering and electron-positron pair production mechanisms, enabling the detection of photons with energies ranging from MeV to TeV. This project aims to conduct a comprehensive survey of the gamma-ray sky from a low Earth orbit using an anti-coincidence detector, a tracker detector that also serves as a low energy calorimeter, and a high energy imaging calorimeter. We developed a Monte Carlo simulation application of the detector with the GEANT4 toolkit to evaluate the instrument performance including the effective area, angular resolution and energy resolution, as well as explored specific optimizations of the detector configuration. Our simulation-based analysis indicates that the VLAST's current design is physically feasible, with an acceptance larger than 10~$\rm m^2\ sr$ which is four times larger than Fermi-LAT, an energy resolution better than 2\% at 10~GeV, and an angular resolution better than 0.2 degrees at 10~GeV. The VLAST project is expected to make significant contribution to the field of gamma-ray astronomy and to enhance our understanding of the cosmos. |
| title | Simulation study of performance of the Very Large Area gamma-ray Space Telescope |
| topic | Instrumentation and Methods for Astrophysics High Energy Astrophysical Phenomena High Energy Physics - Experiment High Energy Physics - Phenomenology Instrumentation and Detectors |
| url | https://arxiv.org/abs/2407.16973 |