Abstract
A brilliance measurement was conducted on July 21, 2014 at the ICON beamline at SINQ as a benchmark before any potential changes are made to the liquid deuterium cold neutron source in a future extended shutdown period. The peak brilliance of the deuterium cold source at SINQ has been measured to be 3.3±0.15×1011 n cm−2 s−1 mA−1 Å −1 sterad−1 at 1.8 Å, and the total brilliance (energy-integrated) has been measured to be 9.1±0.77×1011 n cm−2 s−1 mA−1 sterad−1 for wavelengths above 0.7 Å via a time-of-flight measurement at the ICON beamline. Using a detailed MCNP model, the peak brilliance has been calculated to be 3.1±0.14×1011 n cm−2 s−1 mA−1 Å −1 sterad−1 at 1.65 Å, and the total brilliance (energy-integrated) has been calculated to be 9.2±1.2×1011 n cm−2 s−1 mA−1 sterad−1 for wavelengths above 0.7 Å. The peak brilliance value and wavelength position disagree only slightly between the measurement and model (7% difference in value, 8% difference in wavelength position), and the total brilliance agrees within the uncertainty bounds. The close agreement validates the models and benchmarks the state of the cold source.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.