Strong reduction of the effective radiation length in an axially oriented scintillator crystal

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 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.

References in corpus (3)

• The Large Area Telescope on the Fermi Gamma-ray Space Telescope Mission
• Resonant production of dark photons in positron beam dump experiments
• High purity 100 GeV electron identification with synchrotron radiation

Cited by in corpus (16)

• Geant4 simulation model of electromagnetic processes in oriented crystals for accelerator physics
• Silicon crystals for steering of high-intensity particle beams at ultra-high energy accelerators
• Crystal-based pair production for a lepton collider positron source
• Efficient ultrafast photoacoustic transduction on Tantalum thin films
• First design of a crystal-based extraction of 6 GeV electrons for the DESY II Booster Synchrotron
• Strong enhancement of electromagnetic shower development induced by high-energy photons in a thick oriented tungsten crystal
• A highly-compact and ultra-fast homogeneous electromagnetic calorimeter based on oriented lead tungstate crystals
• Radiation in oriented crystals: Innovative application to future positron sources
• Investigation of Radiation Emitted by Sub GeV Electrons in Oriented Scintillator Crystals
• A high-performance custom photodetection system to probe the light yield enhancement in oriented crystals
• Particle identification capability of a homogeneous calorimeter composed of oriented crystals
• High-Precision Alignment Techniques for Realizing an Ultracompact Electromagnetic Calorimeters Using Oriented high-Z Scintillator Crystals
• Can electron beams be really focused by bent crystals?
• Positron sources: from conventional to advanced accelerator concepts-based colliders
• Relativistic particle incoherent scattering by the nuclei of crystal plane atoms
• R&D on a high-performance electromagnetic calorimeter based on oriented crystalline scintillators