Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Lattice Design of a Carbon-Ion Synchrotron based on Double-Bend Achromat
  Lens   A normal-conducting carbon-ion synchrotron design for cancer therapy is
proposed. The lattice design is based on the double-bend achromat lens with
additional quadrupole magnets. The proposed synchrotron design is compact with
a circumference of 55 meters. The lattice is tuned for slow extraction at the
third integer resonance and the optical functions are optimised with
considerations for reducing the power consumption during operation.

30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin