6533b855fe1ef96bd12b089b
RESEARCH PRODUCT
Steering of a Sub-GeV electron beam through planar channeling enhanced by rechanneling
E. VallazzaAndrea MazzolariLaura BandieraHartmut BackeEnrico BagliVictor V. TikhomirovVincenzo GuidiD. De SalvadorM. PrestA. BerraD. LiettiWerner Lauthsubject
electron beamEnergy rangesPlanar channelingBent molecular geometryGeneral Physics and AstronomyExtractionCrystallographic planeElectronX-ray sourcesCoherent interactionchanneling; electron beam; beam steerigbeam steerigMonocrystalline siliconPlanarNegative particlesA-particlesVolume reflectionCollimationPhysicsRange (particle radiation)Silicon crystalchannelingNegative particles; Bent crystals; Volume reflection; Deflection; Extraction; Collimation; A-particles; Coherent interaction; Crystallographic plane; Energy ranges; Planar channeling; Silicon crystal; X-ray sourcesReflection (mathematics)Cathode rayPhysics::Accelerator PhysicsAtomic physicsDeflectionBent crystalsEnergy (signal processing)description
We report the observation of efficient steering of a 855 MeV electron beam at MAMI (MAinzer MIkrotron) facilities by means of planar channeling and volume reflection in a bent silicon crystal. A $30.5\text{ }\text{ }\ensuremath{\mu}\mathrm{m}$ thick plate of (211) oriented Si was bent to cause quasimosaic deformation of the (111) crystallographic planes, which were used for coherent interaction with the electron beam. The experimental results are analogous to those recorded some years ago at energy higher than 100 GeV, which is the only comparable study to date. Monte Carlo simulations demonstrated that rechanneling plays a considerable role in a particle's dynamics and hinders the spoiling of channeled particles. These results allow a better understanding of the dynamics of electrons subject to coherent interactions in a bent silicon crystal in the sub-GeV energy range, which is relevant for realization of innovative x-ray sources based on channeling in periodically bent crystals.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-01-01 |