Geant4 simulation of the CERN-EU high-energy reference field (CERF) facility

Area of Science:

• High-energy physics
• Radiation protection
• Aviation safety

Background:

• The CERN-EU high-energy reference field facility is crucial for calibrating radiation detectors.
• Accurate characterization of radiation fields is essential for space and aviation safety.
• Understanding neutron radiation is vital for protecting aircrew and astronauts.

Purpose of the Study:

• To characterize the neutron component of the high-altitude radiation field using the CERN-EU facility.
• To validate simulations of the facility's radiation field using the GEANT4 toolkit.
• To determine secondary particle fluence and dose equivalent rates at various irradiation positions.

Main Methods:

• Utilized a primary particle beam, target, and shielding configuration to reproduce the high-altitude radiation field.
• Employed the GEANT4 (GEometry ANd Tracking) toolkit for detailed simulations of particle transport.
• Conducted experimental measurements using a Bonner sphere spectrometer for neutron fluence validation.

Main Results:

• GEANT4 simulations provided an in-depth understanding of neutron and other particle fluences.
• Secondary particle fluence and dose equivalent rates were determined as a function of primary particle fluence.
• Simulated results were compared with FLUKA Monte Carlo code simulations and experimental data.

Conclusions:

• The CERN-EU facility effectively reproduces relevant neutron radiation fields for aviation.
• GEANT4 simulations offer valuable insights into the facility's radiation characteristics.
• Validated simulation data aids in accurate dosemeter calibration for radiation protection.