Unprecedented mass-production of large-area lithium-drifted silicon (Si(Li)) detectors has been performed for the General Antiparticle Spectrometer (GAPS). GAPS is the first experiment optimized for low-energy cosmic antinuclei. The first long-duration Antarctic balloon flight is scheduled for late 2022. A large-volume silicon tracker plays an essential role in the novel GAPS detection technique, which is based on exotic atom physics. The Si(Li) detectors developed for GAPS feature a large (10 cm) diameter, 2.5 mm thickness with $>$90% sensitive layer, and excellent energy resolution ($<$4 keV for 60 keV X-rays) at relatively high operating temperature ($\sim-$40C). We established a fabrication method and produced $>$1000 detectors with a yield rate of $\sim$90%. Analysis of the fabrication and performance data provide valuable insights into the production methods for such large-area Si(Li) detectors. We report on the results of the mass production of GAPS Si(Li) detectors.
|TIPP2020 abstract resubmission?||No, this is an entirely new submission.|