Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A multiball read-out for the spherical proportional counter   We present a novel concept of proportional gas amplification for the read-out
of the spherical proportional counter. The standard single-ball read-out
presents limitations for large diameter spherical detectors and high pressure
operations. We have developed a multi-ball read-out system which consists of
several balls sitting at a fixed distance from the center of the spherical
vessel. Such a module can tune the volume electric field at the desired value
and can also provide detector segmentation with individual ball read-out. In
the latter case the large volume of the vessel becomes a spherical time
projection chamber with 3D capabilities.

26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ