Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Harmonic Suppression Study on Twin Aperture CCT Type Superconducting
  Quadrupole for CEPC Interaction Region   From the field calculation, we can also draw a conclusion that the different
order harmonics have an independent property, which we can design a combined
magnet by adding some high order harmonics, so that it can save space and
reduce the magnet cost.

5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg