Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the possibility of developing quasi-cw high-power high-pressure laser
  on 4p-4s transition of ArI with electron beam - optical pumping: quenching of
  4s (3P2) lower laser level   A new electron beam-optical procedure is proposed for quasi-cw pumping of
high-pressure large-volume He-Ar laser on 4p[1/2]1 - 4s[3/2]2 argon atom
transition at the wavelength of 912.5 nm. It consists of creation and
maintenance of a necessary density of 4s[3/2]2 metastable state in the gain
medium by a fast electron beam and subsequent optically pumping of the upper
laser level via the classical three-level scheme using a laser diode.
Absorption probing is used to study collisional quenching of Ar* metastable in
electron-beam-excited high-pressure He-Ar mixtures with a low content of argon.
The rate constants for plasma-chemical reactions Ar*+He+Ar-Ar2*+He (3.6 +-
0.4)x10-33 cm6/s, Ar+2He-HeAr*+He (4.4 +- 0.9)x10-36 cm6/s and
Ar*+He-Products+He (2.4 +- 0.3)x10-15 cm3/s are for the first time measured.

31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat