Validation of neutron emission and neutron energy spectrum calculations on MAST with DRESS

TL;DR

This paper validates the DRESS code for neutron emission and energy spectrum calculations on MAST by benchmarking against numerical models and experimental measurements, demonstrating excellent agreement.

Contribution

First validation of DRESS against both numerical predictions and experimental data for neutron emission and spectra on MAST.

Findings

DRESS accurately predicts neutron emissivities and rates.

Neutron energy spectra from DRESS match experimental proton pulse height spectra.

Excellent agreement between DRESS and TRANSP/NUBEAM predictions.

Abstract

The recently developed Directional RElativistic Spectrum Simulator (DRESS) code has been validated for the first time against numerical calculations and experimental measurements performed on MAST. In this validation, the neutron emissivities and rates computed by DRESS are benchmarked against TRANSP/NUBEAM predictions while the neutron energy spectra provided by DRESS taking as input TRANSP/NUBEAM and ASCOT/BBNBI in Gyro-Orbit (GO) mode fast ion distributions are validated against proton pulse height spectra (PHS) measured by the neutron flux monitor. Excellent agreement was found between DRESS and TRANSP/NUBEAM predictions of local and total neutron emission.