Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetowave Induced Plasma Wakefield Acceleration for Ultra High Energy
  Cosmic Rays   Magnetowave induced plasma wakefield acceleration (MPWA) in a relativistic
astrophysical outflow has been proposed as a viable mechanism for the
acceleration of cosmic particles to ultra high energies. Here we present
simulation results that clearly demonstrate the viability of this mechanism for
the first time. We invoke the high frequency and high speed whistler mode for
the driving pulse. The plasma wakefield so induced validates precisely the
theoretical prediction. We show that under appropriate conditions, the plasma
wakefield maintains very high coherence and can sustain high-gradient
acceleration over a macroscopic distance. Invoking gamma ray burst (GRB) as the
source, we show that MPWA production of ultra high energy cosmic rays (UHECR)
beyond ZeV 10^21 eV is possible.

20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th