Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Double-crystal setup measurements at the CERN SPS   In this paper, we discuss an experimental layout for the two-crystals
scenario at the Super Proton Synchrotron (SPS) accelerator. The research
focuses on a fixed target setup at the circulating machine in a frame of the
Physics Beyond Colliders (PBC) project at CERN. The UA9 experiment at the SPS
serves as a testbench for the proof of concept, which is planning to be
projected onto the Large Hadron Collider (LHC) scale. The presented in the text
configuration was used for the quantitative characterization of the deflected
particle beam by a pair of bent silicon crystals. For the first time in the
double-crystal configuration, a particle deflection efficiency by the second
crystal of $0.188 \pm 3 \cdot 10^{-5}$ and $0.179 \pm 0.013$ was measured on
the accelerator by means of the Timepix detector and Beam Loss Monitor (BLM)
respectively. In this setup, a wide range angular scan allowed a possibility to
\textit{in situ} investigate different crystal working regimes (channeling,
volume reflection, etc.), and to measure a bent crystal torsion.

11
The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex