Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Review of the Technical Issues Associated with the Construction of a
  Solar Neutrino TPC   In this note the issues surrounding the realization of a solar neutrino TPC
are reviewed. The technical challenges can be summarized as building a very
large TPC within the low background constraints of solar neutrino
experimentation.

33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
4
The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph