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Gamma-Ray and AntiMatter Survey

Gamma-Ray and AntiMatter Survey (GRAMS) is a proposed project that will make use of a liquid argon time projection chamber (LArTPC) detector as a balloon- or satellite-borne Compton telescope for MeV gamma-ray observations. Additionally, it will have the capability of looking for excess antimatter from potential dark matter annihilation in the cosmos.

Columbia has taken the lead in the design and demonstration of the GRAMS LArTPC readout system. Our group, led by Profs. Georgia Karagiorgi and Reshmi Mukherjee, is involved in the construction of pGRAMS, which is a small-scale prototype demonstrator for GRAMS, scheduled for a balloon-flight in 2025-26, with NASA funding, and in collaboration with Northastern University and NASA-Goddard. Additionally, we are leading detector simulation and optimization studies, and are involved in MeV gamma-ray physics sensitivity studies.

Contact persons: Georgia Karagiorgi and Reshmi Mukherjee