Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spatial resolution and efficiency of prototype sensors for the LHCb VELO
  Upgrade   A comprehensive study of the spatial resolution and detection efficiency of
sensor prototypes developed for the LHCb VELO upgrade is presented. Data
samples were collected at the CERN SPS H8 beam line using a hadron mixture of
protons and pions with momenta of approximately 180 GeV/c. The sensor
performance was characterised using both irradiated and non-irradiated sensors.
Irradiated samples were subjected to a maximum fluence of
$\mathrm{8\times10^{15}~1~MeV~n_{eq}~cm^{-2}}$, of both protons and neutrons.
The spatial resolution is measured comparing the detected hits to the position
as predicted by tracks reconstructed by the Timepix3 telescope. The resolution
is presented for different applied bias voltages and track angles, sensor
thickness and implant size.

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The categories of this paper are: econ
12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga
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The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
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The categories of this paper are: q-fin
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The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph