Implements the detector geometry and magnetic field setup for the PALLAS simulation. More...

#include "PlasmaMLPALLASGeometryConstruction.hh"

Include dependency graph for PlasmaMLPALLASGeometryConstruction.cc:

Variables
G4Mutex	fieldManagerMutex = G4MUTEX_INITIALIZER
	Mutex to synchronize access to the magnetic field manager in multithreaded mode.

Detailed Description

Implements the detector geometry and magnetic field setup for the PALLAS simulation.

This file contains the method definitions for the PlasmaMLPALLASGeometryConstruction class declared in PlasmaMLPALLASGeometryConstruction.hh. It manages:

Construction of the full and simplified detector geometry
Loading of GDML models for realistic component shapes
Definition of visualization attributes for logical volumes
Creation of world and holder volumes
Construction of quadrupoles, collimators, laser-induced fluorescence (LIF) parts, and other experimental sections
Assignment of materials to all volumes
Configuration of the magnetic field and field manager
Optional multithread-safe handling of magnetic field instances

The geometry construction workflow:

Construct():
- Cleans any existing geometry to prevent duplication
- Defines rotation matrices for volume placement
- Calls CreateWorldAndHolder() to create the world and main holder volume
- Constructs quadrupole containers via ConstructQuadrupolesVolume()
- Builds either the full PALLAS geometry (ConstructFullPALLASGeometry()) or a simplified version (ConstructSimplifiedPALLASGeometry())
- Optionally adds collimators and realistic quadrupoles if display flags are enabled
ConstructFullPALLASGeometry():
- Calls construction routines for all experimental sections (Cellule, LIF, Section1-4, Section4Dump)
ConstructSimplifiedPALLASGeometry():
- Constructs only Section4 to avoid track-stopping issues from CAD-based GDML files
ConstructSDandField():
- Initializes and configures the magnetic field
- Sets dipole and quadrupole components, lengths, and drift distances
- Creates and attaches a G4FieldManager with a Runge–Kutta stepper

Thread safety is ensured via:

G4Mutex fieldManagerMutex for synchronized access to the magnetic field manager
G4ThreadLocal instances of PlasmaMLPALLASMagneticField and G4FieldManager

Visualization colors for logical volumes:

"invis", "black", "white", "gray", "red", "orange", "yellow", "green", "cyan", "blue", "magenta"

Notes:

Full PALLAS geometry is mostly used for visualization purposes.
Simplified geometry is recommended for production runs to avoid issues with CAD-based GDML files.
Magnetic field configuration directly impacts particle tracking and beam optics.

Variable Documentation

G4Mutex fieldManagerMutex = G4MUTEX_INITIALIZER

Mutex to synchronize access to the magnetic field manager in multithreaded mode.