Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Predicting PDF tails of flux in plasma sheath region   This letter provides the first prediction of the probability density function
(PDF) of flux $R$ in plasma sheath sheath region in magnetic fusion devices
which is characterized by dynamical equations with exponential non-linearities.
By using a non-perturbative statistical theory (instantons), the PDF tails of
first moment are shown to be modified Gumbel distribution which represents a
frequency distribution of the extreme values of the ensemble. The non-Gaussian
PDF tails that are enhanced over Gaussian predictions are the result of
intermittency caused by short lived coherent structures (instantons).

17
The categories of this paper are: q-fin
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci