Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Notre-Dame Cube: An active-target time-projection chamber for
  radioactive beam experiments and detector development   Active-target detectors have the potential to address the difficulties
associated with the low intensities of radioactive beams. We have developed an
active-target detector, the Notre Dame Cube (ND-Cube), to perform experiments
with radioactive beams produced at $\mathit{TwinSol}$ and to aid in the
development of active-target techniques. Various aspects of the ND-Cube and its
design were characterized. The ND-Cube was commissioned with a $^{7}$Li beam
for measuring $^{40}$Ar + $^{7}$Li fusion reaction cross sections and
investigating $^{7}$Li($\alpha$,$\alpha$)$^{7}$Li scattering events. The
ND-Cube will be used to study a range of reactions using light radioactive ions
produced at low energy.

31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg