Gamma-Ray and AntiMatter Survey(GRAMS) experiment
Abstract
The Gamma-Ray and AntiMatter Survey (GRAMS) is a next-generation experiment using a Liquid Argon Time Projection Chamber (LArTPC) detector to measure MeV gamma rays and antiparticles. MeV gamma-ray observations are important for understanding multi-messenger and time-domain astronomy, enabling exploration of the universe's most potent events, such as supernovae and neutron star mergers. Despite the significance of MeV gamma-rays, GRAMS could also explore the so-called 'MeV gap' region to improve MeV gamma-ray measurement sensitivity that was restricted by the challenge of accurately reconstructing Compton events. Aside from gamma-ray detection, the GRAMS proposed method also serves as an antiparticle spectrometer, targeting the low-energy range of cosmic antinuclei measurements. This work will provide updates on the current status and progress towards the prototype balloon flight with a small-scale LArTPC (pGRAMS) scheduled for early 2026, as well as the recent progress on antihelium-3 sensitivity calculation.
Cite
@article{arxiv.2512.14913,
title = {Gamma-Ray and AntiMatter Survey(GRAMS) experiment},
author = {J. Zeng and T. Aramaki and D. Ames and K. Aoyama and S. Arai and S. Arai and J. Asaadi and A. Bamba and N. Cannady and P. Coppi and G. De Nolfo and M. Errando and L. Fabris and T. Fujiwara and Y. Fukazawa and P. Ghosh and K. Hagino and T. Hakamata and N. Hiroshima and M. Ichihashi and Y. Ichinohe and Y. Inoue and K. Ishikawa and K. Ishiwata and T. Iwata and G. Karagiorgi and T. Kato and H. Kawamura and D. Khangulyan and J. Krizmanic and J. LeyVa and A. Malige and J. G. Mitchell and J. W. Mitchell and R. Mukherjee and R. Nakajima and K. Nakazawa and H. Odaka and K. Okuma and K. Perez and I. Safa and K. Sakai and M. Sasaki and W. Seligman and J. Sensenig and K. Shirahama and T. Shiraishi and S. Smith and Y. Suda and A. Suraj and H. Takahashi and S. Takashima and T. Tamba and M. Tanaka and S. Tandon and R. Tatsumi and J. Tomsick and N. Tsuji and Y. Uchida and Y. Utsumi and S. Watanabe and Y. Yano and K. Yawata and H. Yoneda and K. Yorita and M. Yoshimoto},
journal= {arXiv preprint arXiv:2512.14913},
year = {2025}
}
Comments
9 pages, 4 figures, proceeding for The XIX International Conference on Topics in Astroparticle and Underground Physics (TAUP2025)