Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Oscura Experiment   The Oscura experiment will lead the search for low-mass dark matter particles
using a very large array of novel silicon Charge Coupled Devices (CCDs) with a
threshold of two electrons and with a total exposure of 30 kg-yr. The R&D
effort, which began in FY20, is currently entering the design phase with the
goal of being ready to start construction in late 2024. Oscura will have
unprecedented sensitivity to sub-GeV dark matter particles that interact with
electrons, probing dark matter-electron scattering for masses down to 500 keV
and dark matter being absorbed by electrons for masses down to 1 eV. The Oscura
R&D effort has made some significant progress on the main technical challenges
of the experiment, of which the most significant are engaging new foundries for
the fabrication of the CCD sensors, developing a cold readout solution, and
understanding the experimental backgrounds.

26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess
7
The categories of this paper are: hep-th
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas