Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Characterizing filamentary magnetic structures in counter-streaming
  plasmas by Fourier analysis of proton images   Proton imaging is a powerful tool for probing electromagnetic fields in a
plasma, providing a path-integrated map of the field topology. However, in
cases where the field structure is highly inhomogeneous, inferring spatial
properties of the underlying field from proton images can be difficult. This
problem is exemplified by recent experiments which used proton imaging to probe
the filamentary magnetic field structures produced by the Weibel instability in
collisionless counter-streaming plasmas. In this paper, we perform analytical
and numerical analysis of proton images of systems containing many magnetic
filaments. We find that, in general, the features observed on proton images do
not directly correspond to the spacing between magnetic filaments (the magnetic
wavelength) as has previously been assumed, and that they instead correspond to
the filament size. We demonstrate this result by Fourier analysis of synthetic
proton images for many randomized configurations of magnetic filaments. Our
results help guide the interpretation of experimental proton images of
filamentary magnetic structures in plasmas.

32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
19
The categories of this paper are: eess
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg