Paper

{
  "raw_xml": "<entry>\n    <id>http://arxiv.org/abs/2603.19622v1</id>\n    <title>A Concept of Next-Generation Atmospheric Cherenkov Telescope Array (NG-ACTA)</title>\n    <updated>2026-03-20T03:59:49Z</updated>\n    <link href='https://arxiv.org/abs/2603.19622v1' rel='alternate' type='text/html'/>\n    <link href='https://arxiv.org/pdf/2603.19622v1' rel='related' title='pdf' type='application/pdf'/>\n    <summary>The Next-Generation Atmospheric Cherenkov Telescope Array (NG-ACTA) is proposed as a prospective infrastructure for very high energy (VHE) gamma-ray astronomy, consisting of a mixed-aperture array of 88 telescopes with a maximum array diameter of 10 km. The array adopts a three-tier configuration of 30 m large-aperture Large Size Telescopes (LSTs), 12 m medium-aperture Medium Size Telescopes (MSTs), and 6 m small-aperture Small Size Telescopes (SSTs), enabling continuous gamma-ray detection across the full energy band from 20 GeV to 100 TeV. With core advantages of an ultra-low detection threshold ($\\leq20$ GeV), ultra-high angular resolution ($\\leq0.04^\\circ$), ultra-large effective area ($\\geq1\\times10^5$ m$^2$), extreme cosmic ray background rejection (proton rejection efficiency $\\geq99.99\\%$), and rapid transient response ($\\leq100$ ns trigger latency), NG-ACTA targets the most cutting-edge and transformative fundamental scientific topics in modern astrophysics and particle physics, including VHE gamma-ray astronomy, cosmic ray origin, multi-messenger astronomy, and dark matter as well as new physics tests.\n  The array's scientific goals cover five core fields: particle astrophysics, VHE gamma-ray astronomy, cosmic ray physics, multi-messenger astronomy, and new physics exploration, with six hierarchical and mutually supportive scientific objectives from Galactic to extragalactic sources, steady to transient objects, and conventional objects to dark matter. A comprehensive comparison with international under-construction facilities (e.g., CTAO-North, CTAO-South) and Chinese facilities (e.g., LACT) demonstrates that NG-ACTA leads the world in low-energy threshold, baseline length, background suppression, and multi-messenger rapid response capabilities.</summary>\n    <category scheme='http://arxiv.org/schemas/atom' term='astro-ph.HE'/>\n    <category scheme='http://arxiv.org/schemas/atom' term='hep-ex'/>\n    <published>2026-03-20T03:59:49Z</published>\n    <arxiv:comment>13 pages, 1 figures</arxiv:comment>\n    <arxiv:primary_category term='astro-ph.HE'/>\n    <author>\n      <name>Jiancheng Wang</name>\n    </author>\n    <author>\n      <name>Jirong Mao</name>\n    </author>\n  </entry>"
}