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| Format: | Preprint |
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2025
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| Online Access: | https://arxiv.org/abs/2504.12930 |
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| _version_ | 1866912333033373696 |
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| author | Lathika, Keerthana Rajan |
| author_facet | Lathika, Keerthana Rajan |
| contents | The High Energy Cosmic-Radiation Detection (HERD) facility has been proposed as a leading experiment on China's Space Station (CSS). Scheduled for installation around 2027, HERD is expected to operate for at least a decade. The main scientific objectives include indirect detection of dark matter with unprecedented sensitivity, studying the cosmic-ray spectrum and composition up to the knee, and observing all-sky gamma rays with energies above 100 MeV. HERD is designed as a large-acceptance telescope with a unique design aimed at maximizing its efficiency. It comprises a central 3D imaging calorimeter (CALO) made of LYSO crystals, encircled by four complementary subdetectors on its top and four lateral faces: the scintillating fiber tracking detector (FIT), the plastic scintillator detector (PSD), the silicon charge detector (SCD), and a transition radiation detector (TRD) on one lateral side. To fully harness HERD gamma-ray detection capabilities down to 100 MeV, an advanced ultra-low-energy gamma-ray (ULEG) trigger system has been developed. We present an extensive overview of the design, performance, and optimization of the gamma-ray trigger system supported by software simulations and preliminary results from the successful implementation of the HERD prototype at CERN's PS and SPS beam test campaigns in Fall 2023. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_12930 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Performance of the advanced gamma-ray trigger system for the High Energy Cosmic Radiation Detection (HERD) facility Lathika, Keerthana Rajan High Energy Astrophysical Phenomena The High Energy Cosmic-Radiation Detection (HERD) facility has been proposed as a leading experiment on China's Space Station (CSS). Scheduled for installation around 2027, HERD is expected to operate for at least a decade. The main scientific objectives include indirect detection of dark matter with unprecedented sensitivity, studying the cosmic-ray spectrum and composition up to the knee, and observing all-sky gamma rays with energies above 100 MeV. HERD is designed as a large-acceptance telescope with a unique design aimed at maximizing its efficiency. It comprises a central 3D imaging calorimeter (CALO) made of LYSO crystals, encircled by four complementary subdetectors on its top and four lateral faces: the scintillating fiber tracking detector (FIT), the plastic scintillator detector (PSD), the silicon charge detector (SCD), and a transition radiation detector (TRD) on one lateral side. To fully harness HERD gamma-ray detection capabilities down to 100 MeV, an advanced ultra-low-energy gamma-ray (ULEG) trigger system has been developed. We present an extensive overview of the design, performance, and optimization of the gamma-ray trigger system supported by software simulations and preliminary results from the successful implementation of the HERD prototype at CERN's PS and SPS beam test campaigns in Fall 2023. |
| title | Performance of the advanced gamma-ray trigger system for the High Energy Cosmic Radiation Detection (HERD) facility |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2504.12930 |