Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non Linear Compton Scattering of Strong Laser Radiation on Channeled
  Particles in a Crystal   A version for intense $\gamma $-ray radiation based on the multiphoton
scattering of strong laser radiation on relativistic particle beam channeled in
a crystal is proposed. The scheme is considered when the incident laser beam
and charged paricles beam are counter-propagating and the laser radiation is
resonant to the energy levels of transversal motion of channeled particles.

30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
2
The categories of this paper are: math
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg