Hard polarized photon emission in single crystals by high energy electrons for planar crystal orientations

Darbinyan, S.M.; Ter-Isaakyan, N.L.

doi:10.1016/s0168-583x(01)00936-3

Cited by 3 publications

(1 citation statement)

References 7 publications

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“…The CB and CPP theory may be applied for the incidence angles with respect to the crystal axes/planes θ 0 ≫ θ v . The general theory of radiation and pair production is used [10,11] for incident angles θ 0 ∼ θ v and θ 0 < θ v .…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Computer simulation of coherent interaction of charged particles and photons with crystalline solids at high energies

Apyan¹

2007

Nuclear Instruments and Methods in Physics Research Section B:

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Monte Carlo simulation code has been developed and tested for studying the passage of charged particle beams and radiation through the crystalline matter at energies from tens of MeV up to hundreds of GeV. The developed Monte Carlo code simulates electron, positron and photon shower in single crystals and amorphous media. The Monte Carlo code tracks all the generations of charged particles and photons through the aligned crystal by taking into account the parameters of incoming beam, multiple scattering, energy loss, emission angles, transverse dimension of beams, and linear polarization of produced photons.The simulation results are compared with the CERN-NA-59 experimental data. The realistic descriptions of the electron and photon beams and the physical processes within the silicon and germanium single crystals have been implemented.

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Section: Theoretical Backgroundmentioning

confidence: 99%

Computer simulation of coherent interaction of charged particles and photons with crystalline solids at high energies

Apyan¹

2007

Nuclear Instruments and Methods in Physics Research Section B:

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Coherent bremsstrahlung, coherent pair production, birefringence, and polarimetry in the 20–170 GeV energy range using aligned crystals

Apyan¹,

Avakian²,

Badełek³

et al. 2008

Phys. Rev. ST Accel. Beams

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The processes of coherent bremsstrahlung (CB) and coherent pair production (CPP) based on aligned crystal targets have been studied in the energy range 20 -170 GeV. The experimental arrangement allowed for measurements of single photon properties of these phenomena including their polarization dependences. This is significant as the theoretical description of CB and CPP is an area of active debate and development. With the approach used in this paper, both the measured cross sections and polarization observables are predicted very well. This indicates a proper understanding of CB and CPP up to energies of 170 GeV. Birefringence in CPP on aligned crystals is applied to determine the polarization parameters in our measurements. New technologies for high-energy photon beam optics including phase plates and polarimeters for linear and circular polarization are demonstrated in this experiment. Coherent bremsstrahlung for the strings-on-strings (SOS) orientation yields a larger enhancement for hard photons than CB for the channeling orientations of the crystal. Our measurements and our calculations indicate low photon polarizations for the high-energy SOS photons.

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The interaction of relativistic particles with strong crystalline fields

2005

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Hard polarized photon emission in single crystals by high energy electrons for planar crystal orientations

Cited by 3 publications

References 7 publications

Computer simulation of coherent interaction of charged particles and photons with crystalline solids at high energies

Computer simulation of coherent interaction of charged particles and photons with crystalline solids at high energies

Coherent bremsstrahlung, coherent pair production, birefringence, and polarimetry in the 20–170 GeV energy range using aligned crystals

The interaction of relativistic particles with strong crystalline fields

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