geant4

Examples in this directory are dedicated to various coherent effects
in oriented crystals, in particular, channeling, channeling radiation,
coherent bremsstrahlung, coherent pair production etc. as well as their
various applications.

ch0
-------

This example shows how channeling in bent crystal can be simulated
in Geant4 using G4Channeling process. The example simulates the channeling
of 400 GeV/c protons in bent Si crystal. It has been moved into channeling/ch0
from the channeling folder.

ch1
-------

This example 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.

ch2
-------

This example is an enhanced version of ch1, providing the user with
the full functionality of both the G4ChannelingFastSimModel and G4BaierKatkov,
with parameters set up via a macro, in order to simulate the physics of
channeling and channeling radiation/coherent bremsstrahlung, and enhanced output.
The example can be exploited for a wide range of cases to study coherent effects in
a straight, bent or periodically bent crystal (crystalline undulator).

ch3
-------

This example is an easy demonstration of the minimum requirements necessary
to integrate the G4CoherentPairProduction process along with G4ChannelingFastSimModel
and G4BaierKatkov into a project in order to simulate the physics of electromagnetic
shower in an oriented crystal. The simulation includes the physics of channeling,
channeling radiation/coherent bremsstrahlung and coherent pair production.
The structure of this example is based on ch1, but with the G4CoherentPairProductionPhysics
process included, as well as different output, a different crystal material, alignment and
geometry parameters, and a photon beam as the incoming source instead of charged particles.