Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Underground physics without underground labs: large detectors in
  solution-mined salt caverns   A number of current physics topics, including long-baseline neutrino physics,
proton decay searches, and supernova neutrino searches, hope to someday
construct huge (50 kiloton to megaton) particle detectors in shielded,
underground sites. With today's practices, this requires the costly excavation
and stabilization of large rooms in mines. In this paper, we propose utilizing
the caverns created by the solution mining of salt. The challenge is that such
caverns must be filled with pressurized fluid and do not admit human access. We
sketch some possible methods of installing familiar detector technologies in a
salt cavern under these constraints. Some of the detectors discussed are also
suitable for deep-sea experiments, discussed briefly. These sketches appear
challenging but feasible, and appear to force few major compromises on detector
capabilities. This scheme offers avenues for enormous cost savings on future
detector megaprojects.

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The categories of this paper are: gr-qc
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The categories of this paper are: chao-dyn
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The categories of this paper are: comp-gas
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The categories of this paper are: dg-ga
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The categories of this paper are: econ
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
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The categories of this paper are: nlin
6
The categories of this paper are: astro-ph