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Strong Reduction of the Effective Radiation Length in an Axially Oriented Scintillator Crystal
- Source :
- Physical Review Letters
- Publication Year :
- 2018
-
Abstract
- We measured a considerable increase of the emitted radiation by 120 GeV/c electrons in an axially oriented lead tungstate scintillator crystal, if compared to the case in which the sample was not aligned with the beam direction. This enhancement resulted from the interaction of particles with the strong crystalline electromagnetic field. The data collected at the external lines of the CERN Super Proton Synchrotron were critically compared to Monte Carlo simulations based on the Baier-Katkov quasiclassical method, highlighting a reduction of the scintillator radiation length by a factor of 5 in the case of beam alignment with the [001] crystal axes. The observed effect opens the way to the realization of compact electromagnetic calorimeters or detectors based on oriented scintillator crystals in which the amount of material can be strongly reduced with respect to the state of the art. These devices could have relevant applications in fixed-target experiments, as well as in satellite-borne γ telescopes. We measured a considerable increase of the emitted radiation by 120 GeV/c electrons in an axially oriented lead tungstate scintillator crystal, if compared to the case in which the sample was not aligned with the beam direction. This enhancement resulted from the interaction of particles with the strong crystalline electromagnetic field. The data collected at the external lines of CERN SPS were critically compared to Monte Carlo simulations based on the Baier Katkov quasiclassical method, highlighting a reduction of the scintillator radiation length by a factor of five in case of beam alignment with the [001] crystal axes. The observed effect opens the way to the realization of compact electromagnetic calorimeters/detectors based on oriented scintillator crystals in which the amount of material can be strongly reduced with respect to the state of the art. These devices could have relevant applications in fixed-target experiments as well as in satellite-borne gamma-telescopes.
- Subjects :
- Electromagnetic field
Physics - Instrumentation and Detectors
Physics::Instrumentation and Detectors
FOS: Physical sciences
General Physics and Astronomy
Electron
Scintillator
Radiation
01 natural sciences
Radiation length
High Energy Physics - Experiment
NO
Crystal
High Energy Physics - Experiment (hep-ex)
Physics and Astronomy (all)
0103 physical sciences
Detectors and Experimental Techniques
010306 general physics
physics.ins-det
Physics
hep-ex
010308 nuclear & particles physics
Instrumentation and Detectors (physics.ins-det)
Super Proton Synchrotron
Atomic physics
Particle Physics - Experiment
Beam (structure)
Subjects
Details
- Language :
- English
- ISSN :
- 00385646 and 00233323
- Database :
- OpenAIRE
- Journal :
- Physical Review Letters
- Accession number :
- edsair.doi.dedup.....a2e8275daefd1ecaeb4e330b5d9f59e4