Year: 2025
Type: conference-paper
Abstract: The General Antiparticle Spectrometer (GAPS) experiment aims to elucidate the nature of dark matter by detecting low-energy antinuclei using a long-duration scientific balloon over Antarctica. The GAPSdetector consists of a tracker made of lithium-drifted Silicon detectors, surrounded by two layers of Time-of-Flight (TOF) plastic scintillators. To achieve an energy resolution of 4 keV FWHM in the 20–100 keV range, the Silicon detectors are cooled to −40◦C using Multi-loop Capillary Heat Pipes (MCHPs), specifically developed for GAPS. The MCHPs transport heat from the detectors to a radiator attached to the payload’s sidewall. On the ground, the radiator is directly cooled by the Ground Cooling System (GCS) to enable detector testing. The GCS consists of a chiller, a cold plate, and insulating foam. GAPS has completed successful instrument commissioningduringthispastAntarcticlaunchseason. Duringthisperiod, weconductedcooling tests to investigate the detector performance using the GCS. Unfortunately, GAPS was not able to launch in the past season due to weather. GAPS remains assembled at the LDB site and stands ready for its first scientific ballon flight in the austral summer of 2025-2026. In this talk, we will present the results of the ground tests conducted during the 2024/25 season, with a particular focus on the performance of the cooling system.
DOI: 10.22323/1.501.0466
Author: Kazutaka Aoyama
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Funders: National Science Foundation, U.S. Department of Energy, National Aeronautics and Space Administration, Nuclear Safety and Security Commission, Istituto Nazionale di Fisica Nucleare, Office of Science, Japan Society for the Promotion of Science, Japan Aerospace Exploration Agency, Astrophysics Division
Awards: G121915436, THIS IS A CO-I PROPOSAL IN SUPPORT OF THE PI LEAD PROPOSAL ENTITLED THE GAPS EXPERIMENT, A SEARCH FOR DARK MATTER USING LOW ENERGY ANTIPROTONS AND AN, Ultra-sensitive Observation of Cosmic-ray Antiparticles to Search for Dark Matter, G1645119126, Thermal Performance of Circular Oscillating Heat Pipe for Highly Adaptable Tube Layout and Arrangement of Heated and Cooled Sections, G1657984770, Highly sensitive observation of cosmic-ray antiparticles using novel technologies and exotic-atom physics, G203625172, G2411683797, THIS IS THE LEAD PROPOSAL FOR A MULTI INSTITUTIONAL PROPOSAL WHICH INCLUDES UCLA, UCB, UNIVERSITY OF HAWAII, AND M.I.T. THE GENERAL ANTIPARTICLE SPEC, G2988778103, Partnership to Advance Throughput Computing (PATh), G3152970718, THIS IS A CO-I PROPOSAL IN SUPPORT OF THE PI LEAD PROPOSAL ENTITLED "HE GAPS EXPERIMENT: A SEARCH FOR DARK MATTER USING LOW ENERGY ANTIPROTONS AND A, Development of an in-flight X-ray energy calibration method using short-lived nuclei for Antarctic orbiting balloon experiments, G3912533391, G393689804, Graduate Research Fellowship Program (GRFP), 南極長期周回気球による暗黒物質探索実験GAPSの粒子識別性能向上の研究, CC* Data Storage: KoaStore: A High Performance and Flexible Research Storage Resource, International Antarctic balloon-borne experiment GAPS to open the next era of cosmic-ray observation and dark-matter search, G535586399, Graduate Research Fellowship Program (GRFP), Institute for Research and Innovation in Software for High Energy Physics (IRIS-HEP), 特性X線と荷電粒子の同時較正による宇宙線反粒子観測の高度化, 暗黒物質間接探索のための反粒子原子核捕獲反応の測定を通じた反重陽子観測感度向上, Search for cosmic-ray heavy antiparticles with Antarctica balloon, G8269158468, CC* Compute: Koa - A High Performance and Flexible Research Computing Resource, G8906985441
OpenAlex ID: W4414481601
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