Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Online charge calibration of LHAASO-WCDA---a study with the engineering
  array   LHAASO-WCDA is a large ground-based water Cherenkov detector array planned to
be built at Shangri-La, Yunnan Province, China. As a major component of LHAASO
project, the main purpose of LHAASO-WCDA is to survey the northern sky for
very-high-energy (above 100 GeV) gamma ray sources. To gain full knowledge of
water Cherenkov technique and to well investigate engineering issues, a 9-cell
detector array has been built at Yang-Ba-Jing site, neighboring to the ARGO-YBJ
experiment. With the array, charge calibration methods for low and high ranges
of the PMT readout are studied, whose result shows that a very high precision
at several percentages can be reached. These calibration methods are proposed
to be applied in the future LHAASO-WCDA project.

11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ