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Characterisation of the TRIUMF neutron facility using a Monte Carlo simulation code.

S D Monk¹, T Abram², M J Joyce²

¹Department of Engineering, Lancaster University, Lancaster LA1 4YR, UK s.monk@lancaster.ac.uk.

Radiation Protection Dosimetry

|October 25, 2014

Summary

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Monte Carlo simulations characterized the high-energy neutron field at TRIUMF

Area of Science:

Nuclear Physics
Radiation Science
Particle Physics

Background:

TRIUMF operates a Thermal Neutron Facility (TNF) for research.
Understanding neutron fields is crucial for radiation safety and experimental design.
High-energy neutrons are relevant to space radiation and aviation safety.

Purpose of the Study:

To characterize the high-energy neutron field at TRIUMF.
To validate Monte Carlo simulation results with experimental data.
To assess the facility's suitability for emulating cosmic radiation environments.

Main Methods:

Utilized MCNPX version 2.6.0 Monte Carlo simulation software.
Determined neutron fluence rates at three locations within the TNF.
Compared simulated neutron energy spectrum with cosmic ray data and foil activation measurements.

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Main Results:

Neutron fluence rates were calculated at key locations within the TRIUMF Thermal Neutron Facility.
Simulated neutron energy spectrum was compared to cosmic radiation at aircraft altitudes.
Calculated values showed agreement within an order of magnitude with foil activation measurements.

Conclusions:

MCNPX simulations provide a reliable characterization of the neutron field at TRIUMF.
The TRIUMF Thermal Neutron Facility can emulate aspects of high-altitude cosmic radiation.
The study validates simulation methods against experimental neutron flux measurements.