Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: SND Upgade   The program of upgrade of the Spherical Neutral Detector for future
experiments at a new VEPP-2000 $e^+e^-$ collider is presented. Modernization
includes upgrades of electromagnetic calorimeter, tracking system, detector
electronics, data acquisition system, and offline software. It is also planned
to equip the detector with two new subsystems: particle identification system
based on aerogel Cherenkov counters and external electron tagging system for
$\gamma\gamma$ physics.

32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess
0
The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
7
The categories of this paper are: hep-th