Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetic measurement with coils and wires   Accelerator magnets steer particle beams according to the field integrated
along the trajectory over the magnet length. Purpose-wound coils measure these
relevant parameters with high precision and complement efficiently point-like
measurements performed with Hall plates or NMR probes. The rotating coil method
gives a complete two-dimensional description of the magnetic field in a series
of normal and skew multipoles. The more recent single stretched wire is a
reference instrument to measure field integrals and to find the magnetic axis.

16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
4
The categories of this paper are: cond-mat
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an