Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: DIRC, a New Type of Particle Identification System for BABAR   The DIRC, a new type of Cherenkov imaging device, has been selected as the
primary particle identification system for the BABAR detector at the asymmetric
B-factory, PEP-II. It is based on total internal reflection and uses long,
rectangular bars made from synthetic fused silica as Cherenkov radiators and
light guides. In this paper, the principles of the DIRC ring imaging Cherenkov
technique are explained and results from the prototype program are presented.
The studies of the optical properties and radiation hardness of the quartz
radiators are described, followed by a discussion of the detector design.

21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
2
The categories of this paper are: math
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol