Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Plasma Stratification in Radio-Frequency Discharges of Noble Gases   We conducted experimental studies and computer simulations of standing
striations in capacitive coupled plasma in Argon gas. Standing striations were
observed at frequencies 3.6, 8.4 and 19.0 MHz, in a pressure range 0.05-10
Torr, tube radius R=1.1 cm, for a certain range of discharge currents (plasma
densities). Numerical simulations revealed similar nature of standing
striations in CCP and moving striations in DC discharges under similar
discharge conditions. Comparison of computer simulations with experimental
observations helped clarify the nature of these striations. The non-linear
dependence of the ionization rate on electron density is shown to be the main
underlying mechanism of the stratification phenomena.

33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin