Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ultra-strong laser pulses: streak-camera for gamma-rays via pair
  production and quantum radiative reaction   We show that a strong laser pulse combined with a strong x-ray pulse can be
employed in a detection scheme for characterizing high-energy $\gamma$-ray
pulses down to the zeptosecond timescale. The scheme employs streak imaging
technique built upon the high-energy process of electron-positron pair
production in vacuum through the collision of a test pulse with intense laser
pulses. The role of quantum radiation reaction in multiphoton Compton
scattering process and limitations imposed by it on the detection scheme are
examined.

28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg