Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Wave emission of non-thermal electron beams generated by magnetic
  reconnection   Magnetic reconnection in solar flares can efficiently generate non-thermal
electron beams. The energetic electrons can, in turn, cause radio waves through
microscopic plasma instabilities as they propagate through the ambient plasma
along the magnetic field lines. We aim at investigating the wave emission
caused by fast moving electron beams (FEBs) with characteristic non-thermal
electron velocity distribution functions (EVDFs) generated by kinetic magnetic
reconnection: two-streaming EVDFs along the separatrices and in the diffusion
region, and perpendicular crescent-shaped EVDFs closer to the diffusion region.
For this purpose, we utilized 2.5D fully kinetic Particle-In-Cell (PIC) code
simulations in this study. We found that:(1) the two-streaming EVDFs plus the
background ions are unstable to electron/ion (streaming) instabilities which
cause ion acoustic waves and Langmuir waves due to the net current. This can
lead to multiple harmonic plasma emission in the diffusion region and the
separatrices of reconnection. (2) The perpendicular crescent-shaped EVDFs can
cause multiple harmonic electromagnetic electron cyclotron waves through the
electron cyclotron maser instabilities in the diffusion region of reconnection.
Our results are applicable to diagnose the plasma parameters which control
magnetic reconnection in solar flares by means of radio waves observations.

1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn