Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A model of so-called `Zebra' emissions in type IV radio bursts   A simple mechanism for the generation of electromagnetic Zebra pattern
emission is proposed. The mechanism is based on the generation of an ion-ring
distribution in a magnetic mirror geometry in the presence of a properly
directed field-aligned electric potential field. The ion-cyclotron maser then
generates a number of electromagnetic ion-cyclotron harmonics which modulate
the electron maser emission. The mechanism is capable of switching the emission
on and off or amplifying it quasi-periodically which is a main feature of the
observations.

23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat