Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Directed Coulomb explosion effect on proton acceleration by an intense
  laser pulse from a double-layer target   We examine ion acceleration by irradiating a hundred TW laser pulse on a
double-layer target. It is shown analytically and by three-dimensional
particle-in-cell simulations that higher energy protons are obtained by using
material with a high charge-to-mass ratio in the first layer of a double-layer
target, because a strong Coulomb explosion occurs in such a material. As a
result, the protons keep accelerating for a longer time. Using the optimal
conditions for the target, it is shown that high energy and high quality
protons can be generated.

21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
18
The categories of this paper are: econ