Improved description of Bremsstrahlung for high-energy electrons in Geant4

“…More recent references can be found in the review paper by Baier and Katkov [10] while for the implementation of the two effects in Monte Carlo type codes the reader can look at Refs. [11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

A general semi-analytic method to simulate discrete bremsstrahlung at very low radiated photon energies by the Monte Carlo method

Mangiarotti

Sona

Ballestrero

et al. 2011

Nuclear Instruments and Methods in Physics Research Section B:

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“…For the high energy the benchmarking data measured at SLAC 50) and CERN 29) are available. Only new model 8,27) from the Standard EM package implements LPM and density suppressions correctly (Fig. 1).…”

Section: Recent Validation Resultsmentioning

confidence: 99%

“…The resulting restricted cross sections and energy losses are used at run time. 9) For electron models 27) the classical approach 28) was implemented including the density effect suppression. The updated computation of the Landau-Pomeranchuk-Migdal (LPM) effect fits the data 29) much better than the previous Geant4 model (Fig.…”

Section: Relativistic Modelsmentioning

confidence: 99%

Recent Improvements in Geant4 Electromagnetic Physics Models and Interfaces

Ivanchenko¹,

Apostolakis²,

Bagulya³

et al. 2011

Progress in Nuclear Science and Technology

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103

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An overview of the electromagnetic (EM) physics of the Geant4 toolkit is presented. Two sets of EM models are available: the "Standard" initially focused on high energy physics (HEP) while the "Low-energy" was developed for medical, space and other applications. The "Standard" models provide a faster computation but are less accurate for keV energies, the "Low-energy" models are more CPU time consuming. A common interface to EM physics models has been developed allowing a natural combination of ultra-relativistic, relativistic and low-energy models for the same run providing both precision and CPU performance. Due to this migration additional capabilities become available. The new developments include relativistic models for bremsstrahlung and e+e-pair production, models of multiple and single scattering, hadron/ion ionization, microdosimetry for very low energies and also improvements in existing Geant4 models. In parallel, validation suites and benchmarks have been intensively developed.

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“…A review of the bremsstrahlung model was carried out, as presented in [8]. The density effect suppression has been refined according to the classical approach [9] and a new ultrarelativistic model with updated LMP effect has been created, which fit the experimental results [10] much better than the previous Geant4 model (Fig.1).…”

Section: Bremsstrahlungmentioning

confidence: 99%