| Autor: |
Michael Wohlmuther, Vadim Talanov, Masako Yamada, Uwe Filges, T. Reiss, R.M. Bergmann |
| Rok vydání: |
2018 |
| Předmět: |
|
| Zdroj: |
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 906:61-67 |
| ISSN: |
0168-9002 |
| DOI: |
10.1016/j.nima.2018.07.007 |
| Popis: |
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 × 1 0 11 n cm−2 s−1 mA−1 A −1 sterad−1 at 1.8 A, and the total brilliance (energy-integrated) has been measured to be 9 . 1 ± 0 . 77 × 1 0 11 n cm−2 s−1 mA−1 sterad−1 for wavelengths above 0.7 A 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 × 1 0 11 n cm−2 s−1 mA−1 A −1 sterad−1 at 1.65 A, and the total brilliance (energy-integrated) has been calculated to be 9 . 2 ± 1 . 2 × 1 0 11 n cm−2 s−1 mA−1 sterad−1 for wavelengths above 0.7 A. 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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect