3,667 research outputs found
Radiation Emission by Electrons Channeling in Bent Silicon Crystals
Results of numerical simulations of electron channeling and emission spectra
are reported for straight and uniformly bent silicon crystal. The projectile
trajectories are computed using the newly developed module [1] of the MBN
Explorer package [2,3]. The electron channeling along Si(110) crystallographic
planes is studied for the projectile energy 855 MeV.Comment: 9 pages, 7 figures; submitted to European Physical Journal D. arXiv
admin note: text overlap with arXiv:1307.678
Simulation of Ultra-Relativistic Electrons and Positrons Channeling in Crystals with MBN Explorer
A newly developed code, implemented as a part of the \MBNExplorer package
\cite{MBN_ExplorerPaper,MBN_ExplorerSite} to simulate trajectories of an
ultra-relativistic projectile in a crystalline medium, is presented. The motion
of a projectile is treated classically by integrating the relativistic
equations of motion with account for the interaction between the projectile and
crystal atoms. The probabilistic element is introduced by a random choice of
transverse coordinates and velocities of the projectile at the crystal entrance
as well as by accounting for the random positions of the atoms due to thermal
vibrations. The simulated trajectories are used for numerical analysis of the
emitted radiation. Initial approbation and verification of the code have been
carried out by simulating the trajectories and calculating the radiation
emitted by \E=6.7 GeV and \E=855 MeV electrons and positrons in oriented
Si(110) crystal and in amorphous silicon. The calculated spectra are compared
with the experimental data and with predictions of the Bethe-Heitler theory for
the amorphous environment.Comment: 41 pages, 11 figures. Initially submitted on Dec 29, 2012 to Phys.
Rev.
Ultra-relativistic electron beams deflection by quasi-mosaic crystals
This paper provides an explanation of the key effects behind the deflection
of ultra-relativistic electron beams by means of oriented quasi-mosaic Bent
Crystals (qmBC). It is demonstrated that accounting for specific geometry of
the qmBC and its orientation with respect to a collimated electron beam, its
size and emittance is essential for an accurate quantitative description of
experimental results on the beam deflection by such crystals. In an exemplary
case study a detailed analysis of the recent experiment at the SLAC facility is
presented. The methodology developed has enabled to understand the
peculiarities in the measured distributions of the deflected electrons. This
achievement constitutes an important progress in the efforts towards the
practical realization of novel gamma-ray crystal-based light sources and puts
new challenges for the theory and experiment in this research area.Comment: 6 pages, 4 figures plus Supplemental Materia
Calculation and investigation of heat sources specific capactity under cylinder parts inductive heating in case the temherature exceeds Curie temperature
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