Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Critical state solution and AC loss computation of polygonally arranged
  thin superconducting tapes   The current density and field distributions in polygonally arranged thin
superconducting tapes carrying AC current are derived under the assumption of
the critical state model. Starting from the generic Biot-Savart law for a
general polygonal geometry, we derive a suitable integral equation for the
calculation of the current density and magnetic field in each tape. The model
works for any transport current below $I_c$, which makes it attractive for
studying cases of practical interest, particularly the dependence of AC losses
on parameters such as the number of tapes, their distance from the center, and
their separation.

22
The categories of this paper are: chao-dyn
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The categories of this paper are: hep-th
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
2
The categories of this paper are: math