Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Study of multiple scattering in high magnetic fields   Muon cooling for a neutrino factory or muon collider can be achieved using
low-Z absorbers in strong focusing fields. Proposed cooling lattices place
absorbers in solenoidal fields ranging up to 30 to 40T. The cooling performance
of these lattices is determined by the interplay of ionization energy loss and
Moliere scattering, but Bethe's classic treatment of Moliere scattering ignores
the helical motion of charged particles in solenoidal fields. When this motion
is taken into account, the performance of these lattices can be better than
predicted by simulations using the standard treatment.

28
The categories of this paper are: alg-geom
4
The categories of this paper are: cond-mat
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg