Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Investigation of target in C-ADS and IAEA ADS benchmark   The spatial and energy distribution of spallation neutrons have an effect on
the performance of Accelerator Driven Subcritical systems. In this work, the
spatial, energy distribution of spallation neutrons and the effect of these
factors on proton efficiency was studied. When the radius of spallation region
increases, backward neutrons were found to have a rather big ratio and have a
positive effect on proton efficiency. By making better use of these neutrons,
we may increase the radius of target to satisfy some other requirements in the
design of subcritical core.

0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys