  Lithium-drifted silicon [Si(Li)] has been used for decades as an ionizing
radiation detector in nuclear, particle, and astrophysical experiments, though
such detectors have frequently been limited to small sizes (few cm$^2$) and
cryogenic operating temperatures. The 10-cm-diameter Si(Li) detectors developed
for the General Antiparticle Spectrometer (GAPS) balloon-borne dark matter
experiment are novel particularly for their requirements of low cost, large
sensitive area (~10 m$^2$ for the full 1440-detector array), high temperatures
(near -40$\,^\circ$C), and energy resolution below 4 keV FWHM for 20--100-keV
x-rays. Previous works have discussed the manufacturing, passivation, and
small-scale testing of prototype GAPS Si(Li) detectors. Here we show for the
first time the results from detailed characterization of over 1100 flight
detectors, illustrating the consistent intrinsic low-noise performance of a
large sample of GAPS detectors. This work demonstrates the feasibility of
large-area and low-cost Si(Li) detector arrays for next-generation astrophysics
and nuclear physics applications.
