Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Neutrino Detectors as Tools for Nuclear Security   For over 40 years, physicists have considered possible uses for neutrino
detectors in nuclear nonproliferation, arms control, and fissile materials
security. Neutrinos are an attractive fission signature because they readily
pass through matter. The same property makes neutrinos challenging to detect in
systems that would be practical for nuclear security applications. This
colloquium presents a broad overview of several potential neutrino
applications, including the near-field monitoring of known reactors, far-field
monitoring of known or discovery of undeclared reactors, detection of reactor
waste streams, and detection of nuclear explosions. We conclude that recent
detector advances have made near-field monitoring feasible. Farther-field
reactor detection and waste stream detection monitoring are possible in some
cases with further research and development. Very long-range reactor monitoring
and nuclear explosion detection do not appear feasible for the foreseeable
future due to considerable physical and/or practical constraints.

29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th