Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Enhanced, high energy photon production from resonant Compton scattering
  in a strong external field   A theoretical and phenomenological consideration is given to higher order,
strong field effects in electron/laser interactions. A consistent strong field
theory is the Furry interaction picture of intense field quantum field theory.
In this theory, fermions are embedded in the strong laser field and the Volkov
wavefunction solutions that result, are exact with respect to the strong field.
When these Volkov fermions interact with individual photons from other sources,
the transition probability is enhanced in a series of resonances when the
kinematics allow the virtual fermion to go on-shell. An experiment is proposed
in which, for the first time, resonances could be used to generate high energy
photons from relativistic electrons at rates orders of magnitude in excess of
usual mechanisms.

32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin