Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Design and performance of the silicon sensors for the CMS barrel pixel
  detector   The CMS experiment at the LHC includes a hybrid silicon pixel detector for
the reconstruction of charged tracks and of the interaction vertices. The
barrel region consists of n-in-n sensors with 100X150 um^2 cell size processed
on diffusion oxygenated float zone silicon. A biasing grid is implemented and
pixel isolation is achieved with the moderated p-spray technique. An extensive
test program was carried out on the H2 beam line of the CERN SPS. In this paper
we describe the sensor layout, the beam test setup and the results obtained
with both irradiated and non-irradiated prototype devices. Measurements of
charge collection, hit detection efficiency, Lorentz angle and spatial
resolution are presented.

17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th