Gabriele Cosmo\page Examplech1 Example ch1
\author Alexei Sytov - INFN Ferrara Division (Italy) \n sytov@fe.infn.it
INTRODUCTION
Example ch1 is an easy demonstration of the minimum requirements necessary to integrate the G4ChannelingFastSimModel and the G4BaierKatkov model into a project in order to simulate the physics of channeling and channeling radiation/coherent bremsstrahlung.
This example serves as a guideline for users on how to add this physics to their existing Geant4 projects. It includes the minimum necessary options to incorporate this physics. Specifically, it requires registering G4FastSimulationPhysics in the main routine and adding a few lines of code in DetectorConstruction.
DESCRIPTION
The example is based on the following experiments on channeling [1] and channeling radiation [2] in a bent crystal, carried out at Mainz Mikrotron MAMI with 855 MeV electrons. The experimental validation of G4ChannelingFastSimModel is described in [3].
This example includes a bent crystal and a detector positioned behind it. The incoming beam is set up in macro run.mac.
The example does not include any input of the model or geometry parameters from the macro to keep it as straightforward as possible. The output is recorded into the file results.root. It consists of the charged particle distribution at the detector in the x-plane (the plane of crystal bending and perpendicular to the crystal planes) as well as the spectrum of photons arriving to the detector. To build these plots, one has to open this file in root and use
x_out->Draw()
and
Spectrum->Draw()
for the coordinates and the spectrum, respectively.
REFERENCES
-# A. Mazzolari et al. Phys. Rev. Lett. 112, 135503 (2014). -# L. Bandiera et al. Phys. Rev. Lett. 115, 025504 (2015). -# A. Sytov et al. Journal of the Korean Physical Society 83, 132–139 (2023).