Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Studies of relative gain and timing response of fine-mesh
  photomultiplier tubes in high magnetic fields   We investigated the use of Hamamatsu fine-mesh photomultiplier tube
assemblies H6152-70 and H6614-70 with regards to their gain and timing
resolution in magnetic fields up to 1.9 T. Our results show that the H6614-70
assembly can operate reliably in magnetic fields exceeding 1.5 T, while
preserving a reasonable timing resolution even with a gain reduction of a
factor of approximately 100. The reduction of the relative gain of the H6152-70
is similar to the H6614-70's near 1.5 T, but its timing resolution worsens
considerably at this high field.

5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci