Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A general detector testing system using cosmic rays   A cosmic ray hodoscope with two-dimensional spacial sensitivity and good time
resolution has been developed. The system is designed to use the cosmic muons
as probes to test the performances of charged particle sensitive detectors.
This paper will present the structure of this system, the timing calibration
and the resulted performance of this system. The results of the test of the
prototype electron detector for LHAASO project are presented as well.

11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
17
The categories of this paper are: q-fin
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an