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0004 Geant4 - an Object-Oriented Toolkit for Simulation in HEP
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0006
0007 Example ch1
0008 -----------
0009 A. Sytov
0010 INFN Ferrara Division, sytov@fe.infn.it
0011
0012 INTRODUCTION
0013 Example ch1 is an easy demonstration of the minimum requirements necessary
0014 to integrate the G4ChannelingFastSimModel and the G4BaierKatkov model into a project
0015 in order to simulate the physics of channeling and
0016 channeling radiation/coherent bremsstrahlung.
0017
0018 This example serves as a guideline for users on how to add this physics
0019 to their existing Geant4 projects. It includes the minimum necessary options
0020 to incorporate this physics. Specifically, it requires registering
0021 G4FastSimulationPhysics in the main routine and
0022 adding a few lines of code in DetectorConstruction.
0023
0024 DESCRIPTION
0025
0026 The example is based on the following experiments on channeling [1] and
0027 channeling radiation [2] in a bent crystal, carried out at Mainz Mikrotron MAMI with
0028 855 MeV electrons. The experimental validation of G4ChannelingFastSimModel is
0029 described in [3].
0030
0031 This example includes a bent crystal and a detector positioned behind it.
0032 The incoming beam is set up in macro run.mac.
0033
0034 The example does not include any input of the model or geometry parameters
0035 from the macro to keep it as straightforward as possible. The output is recorded
0036 into the file results.root. It consists of
0037 the charged particle distribution at the detector in the x-plane
0038 (the plane of crystal bending and perpendicular to the crystal planes) as well as
0039 the spectrum of photons arriving to the detector. To build these plots, one has to
0040 open this file in root and use x_out->Draw() and Spectrum->Draw() for the coordinates
0041 and the spectrum, respectively.
0042
0043 REFERENCES
0044 [1] A. Mazzolari et al. Phys. Rev. Lett. 112, 135503 (2014).
0045 [2] L. Bandiera et al. Phys. Rev. Lett. 115, 025504 (2015).
0046 [3] A. Sytov et al. Journal of the Korean Physical Society 83, 132–139 (2023).
