Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Simple Method for Modeling Collision Processes in Plasmas with a Kappa
  Energy Distribution   We demonstrate that a nonthermal distribution of particles described by a
kappa distribution can be accurately approximated by a weighted sum of
Maxwell-Boltzmann distributions. We apply this method to modeling collision
processes in kappa-distribution plasmas, with a particular focus on atomic
processes important for solar physics. The relevant collision process rate
coefficients are generated by summing appropriately weighted Maxwellian rate
coefficients. This method reproduces the rate coefficients for a kappa
distribution to an estimated accuracy of better than 5%. This is equal to or
better than the accuracy of rate coefficients generated using "reverse
engineering" methods, which attempt to extract the needed cross sections from
the published Maxwellian rate coefficient data and then reconvolve the
extracted cross sections with the desired kappa distribution. Our approach of
summing Maxwellian rate coefficients is easy to implement using existing
spectral analysis software. Moreover, the weights in the sum of the
Maxwell-Boltzmann distribution rate coefficients can be found for any value of
the parameter kappa, thereby enabling one to model plasmas with a time-varying
kappa. Tabulated Maxwellian fitting parameters are given for specific values of
kappa from 1.7 to 100. We also provide polynomial fits to these parameters over
this entire range. Several applications of our technique are presented,
including the plasma equilibrium charge state distribution (CSD), predicting
line ratios, modeling the influence of electron impact multiple ionization on
the equilibrium CSD of kappa-distribution plasmas, and calculating the
time-varying CSD of plasmas during a solar flare.

32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio