Abstract
We study the light output, light collection efficiency and signal timing of a variety of organic scintillators that are being considered for the upgrade of the hadronic calorimeter of the CMS detector. The experimental data are collected at the H2 test-beam area at CERN, using a 150 GeV muon beam. In particular, we investigate the usage of over-doped and green-emitting plastic scintillators, two solutions that have not been extensively considered. We present a study of the energy distribution in plastic-scintillator tiles, the hit efficiency as a function of the hit position, and a study of the signal timing for blue and green scintillators.
Highlights
Experimental areaThis experiment was conducted at the H2 Beam Line located at the North Area of the CERN accelerator complex, in the Prevessin site
- Radioactive source calibration test of the CMS Hadron Endcap Calorimeter test wedge with Phase I upgrade electronics S
: We study the light output, light collection efficiency and signal timing of a variety of organic scintillators that are being considered for the upgrade of the hadronic calorimeter of the CMS detector
Summary
This experiment was conducted at the H2 Beam Line located at the North Area of the CERN accelerator complex, in the Prevessin site. In order of increasing distance from the beam extraction point, the following instruments are installed: wire chamber “A”, wire chamber “B”, four large scintillating plastic trigger counters, and wire chamber “C”. An alignment procedure is established by assuming that the muons are moving along straight lines, and that the distribution of position differences between pairs of wire chambers must be zero-mean Gaussian-distributed. The encoded signal is transmitted, via an optical link, to the back-end electronics; encoded signals from the QIE chips and the wire chambers are built into events, which are saved to disk.
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