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Title: Dual MeV gamma-ray and dark matter observatory - GRAMS Project

Journal Article · · Astroparticle Physics
 [1];  [1];  [2];  [3]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  2. Columbia Univ., New York, NY (United States)
  3. Univ. of Tokyo (Japan)
+ Show Author Affiliations

GRAMS (Gamma-Ray and AntiMatter Survey) is a new project that can simultaneously target both astrophysical observations with MeV gamma rays and an indirect dark matter search with antimatter. The GRAMS instrument is designed with a cost-effective, large-scale LArTPC (Liquid Argon Time Projection Chamber) detector surrounded by plastic scintillators. The astrophysical observations at MeV energies have not yet been investigated (the so-called “MeV-gap”) and GRAMS can improve the sensitivity by more than an order of magnitude compared to previous experiments. While primarily focusing on MeV gamma-ray observations, GRAMS is also optimized for cosmic ray antimatter surveys to indirectly search for dark matter. In particular, low-energy antideuterons will provide an essentially background-free dark matter signature. GRAMS will be a next generation experiment beyond the current GAPS (General AntiParticle Spectrometer) project for antimatter survey.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1575123
Alternate ID(s):
OSTI ID: 1544454
Journal Information:
Astroparticle Physics, Vol. 114, Issue C; ISSN 0927-6505
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (4)

Detection of ultra-high-energy gamma rays from the Crab Nebula: physical implications journal December 2019
Multimessenger tests of cosmic-ray acceleration in radiatively inefficient accretion flows journal October 2019
Multiwavelength Emission from Galactic Jets: The Case of the Microquasar SS433 journal February 2020
Snowmass 2021 Letter of Interest: The GRAMS Project: MeV Gamma-Ray Observations and Antimatter-Based Dark Matter Searches preprint January 2020

Figures / Tables (10)

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Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
MeV gamma rays
Dark matter
Antimatter
Antiprotons
Antideuterons
Antiheliums
GRAMS
LArTPC
GAPS
AMS-02
Fermi GCE