PlasmaMLPALLASPrimaryGeneratorAction.cc File Reference

Implementation of the primary generator action for the PALLAS simulation. More...

#include "PlasmaMLPALLASPrimaryGeneratorAction.hh"

Include dependency graph for PlasmaMLPALLASPrimaryGeneratorAction.cc:

Variables
std::atomic< size_t >	currentParticleNumber {0}
	Global counter of generated particles (atomic to support multithreading).
G4UImanager *	UI = G4UImanager::GetUIpointer()
	Global pointer to the Geant4 UI manager.

Detailed Description

Implementation of the primary generator action for the PALLAS simulation.

This file implements the PlasmaMLPALLASPrimaryGeneratorAction class, which handles the generation of primary particles for Geant4 events in the PALLAS project.

Two generation modes are supported:

1. ONNX model inference: Beam parameters (energy, charge, emittance, transverse positions, and momenta) are predicted by a neural network model and used to configure the particle gun.
2. Geant4 GeneralParticleSource (GPS): Standard Geant4 particle generation.

Features:

• Thread-safe generation using atomic counters and per-thread UI handling.
• Progress display with estimated remaining simulation time.
• Energy smearing with Gaussian fluctuations.

Usage:

• Instantiate the class and assign it to the Geant4 run manager via SetUserAction.
• Configure the ONNX model or GPS via the associated messenger.

Note

Multithreading is supported; thread 0 handles progress display.

Authors

Arnaud HUBER huber.nosp@m.@lp2.nosp@m.ib.in.nosp@m.2p3..nosp@m.fr

Alexei SYTOV sytov.nosp@m.@inf.nosp@m.n.it

Date

2025

Copyright

PALLAS Project - GEANT4 Collaboration

Variable Documentation

currentParticleNumber

std::atomic<size_t> currentParticleNumber {0}

Global counter of generated particles (atomic to support multithreading).

UI

G4UImanager* UI = G4UImanager::GetUIpointer()

Global pointer to the Geant4 UI manager.