2021
1.
Rimmler, Marius; Felden, Olaf; Rücker, Ulrich; Soltner, Helmut; Zakalek, Paul; Gebel, Ralf; Gutberlet, Thomas; Brückel, Thomas
Developments of a multiplexer system for the High-Brilliance Neutron Source HBS Journal Article
In: Journal of Neutron Research, vol. 23, pp. 143–156, 2021, ISSN: 1477-2655.
Abstract | BibTeX | Tags: accelerator-driven, multiplexer, Neutron Source
@article{Rimmler2021,
title = {Developments of a multiplexer system for the High-Brilliance Neutron Source HBS},
author = {Marius Rimmler and Olaf Felden and Ulrich Rücker and Helmut Soltner and Paul Zakalek and Ralf Gebel and Thomas Gutberlet and Thomas Brückel},
issn = {1477-2655},
year = {2021},
date = {2021-01-01},
journal = {Journal of Neutron Research},
volume = {23},
pages = {143–156},
publisher = {IOS Press},
abstract = {The High-Brilliance Neutron Source project (HBS) aims at developing a medium-flux accelerator-driven neutron source based on a 70 MeV, 100 mA proton accelerator. The concept optimizes the facility such that it provides high-brilliance neutron beams for instruments operating at different time structures. This can be realized by generating an interlaced proton pulse structure, which is unraveled and sent to three different target stations by a multiplexer system. In the following we present the developments of a multiplexer system at the JULIC accelerator at Forschungszentrum Jülich GmbH (FZJ), which serves as test facility for HBS. The main components of the JULIC multiplexer system are designed to be scalable to the HBS parameters.},
keywords = {accelerator-driven, multiplexer, Neutron Source},
pubstate = {published},
tppubtype = {article}
}
The High-Brilliance Neutron Source project (HBS) aims at developing a medium-flux accelerator-driven neutron source based on a 70 MeV, 100 mA proton accelerator. The concept optimizes the facility such that it provides high-brilliance neutron beams for instruments operating at different time structures. This can be realized by generating an interlaced proton pulse structure, which is unraveled and sent to three different target stations by a multiplexer system. In the following we present the developments of a multiplexer system at the JULIC accelerator at Forschungszentrum Jülich GmbH (FZJ), which serves as test facility for HBS. The main components of the JULIC multiplexer system are designed to be scalable to the HBS parameters.
2018
2.
Doege, Paul-Emmanuel; Zakalek, Paul; Baggemann, Johannes; Mauerhofer, Eric; Rücker, Ulrich; Cronert, Tobias; Gutberlet, Thomas; Beßler, Yannick; Wolters, Jörg; Butzek, Michael; Böhm, Sarah; Nabbi, Rahim; Natour, Ghaleb; Brückel, Thomas
Parametric study and design improvements for the target of NOVA ERA Journal Article
In: Journal of Neutron Research, vol. 20, pp. 47–54, 2018, ISSN: 1477-2655.
Abstract | BibTeX | Tags: CANS, HBS, Neutron Source, NOVA ERA, Target
@article{2018-Doege,
title = {Parametric study and design improvements for the target of NOVA ERA},
author = {Paul-Emmanuel Doege and Paul Zakalek and Johannes Baggemann and Eric Mauerhofer and Ulrich Rücker and Tobias Cronert and Thomas Gutberlet and Yannick Beßler and Jörg Wolters and Michael Butzek and Sarah Böhm and Rahim Nabbi and Ghaleb Natour and Thomas Brückel},
issn = {1477-2655},
year = {2018},
date = {2018-01-01},
journal = {Journal of Neutron Research},
volume = {20},
pages = {47–54},
publisher = {IOS Press},
abstract = {The results of a parametric study are presented which was conducted in the framework of the High Brilliance Neutron Source Project (HBS), in order to optimise the target dimensions for a Compact Accelerator driven Neutron Source (CANS). A thin disc shaped target cooled by a water jet was taken as design reference, which was recently published in the Conceptual Design Report for NOVA ERA (Neutrons Obtained Via Accelerator for Education and Research Activities). For a given target thickness, limited by the ion range in the target material, the cooling fluid pressure and the heat deposition of the ion beam, an optimal diameter of the target disc can be found, for which the occurring stresses are minimised. With the accelerator parameters of NOVA ERA (10 MeV protons with an average power of 400 W on the Target) and with the results of the parametric study, it was possible to design a target, where the occurring stresses are by a factor 3 smaller than the yield strength of the employed beryllium alloy, S-65C VHP.},
keywords = {CANS, HBS, Neutron Source, NOVA ERA, Target},
pubstate = {published},
tppubtype = {article}
}
The results of a parametric study are presented which was conducted in the framework of the High Brilliance Neutron Source Project (HBS), in order to optimise the target dimensions for a Compact Accelerator driven Neutron Source (CANS). A thin disc shaped target cooled by a water jet was taken as design reference, which was recently published in the Conceptual Design Report for NOVA ERA (Neutrons Obtained Via Accelerator for Education and Research Activities). For a given target thickness, limited by the ion range in the target material, the cooling fluid pressure and the heat deposition of the ion beam, an optimal diameter of the target disc can be found, for which the occurring stresses are minimised. With the accelerator parameters of NOVA ERA (10 MeV protons with an average power of 400 W on the Target) and with the results of the parametric study, it was possible to design a target, where the occurring stresses are by a factor 3 smaller than the yield strength of the employed beryllium alloy, S-65C VHP.
3.
Voigt, J.; Böhm, S.; Dabruck, J. P.; Rücker, U.; Gutberlet, T.; Brückel, T.
Spectrometers for compact neutron sources Journal Article
In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 884, pp. 59-63, 2018, ISSN: 0168-9002.
Abstract | Links | BibTeX | Tags: Neutron Source, Neutron spectrometer
@article{2018-Voigt,
title = {Spectrometers for compact neutron sources},
author = {J. Voigt and S. Böhm and J. P. Dabruck and U. Rücker and T. Gutberlet and T. Brückel},
url = {https://www.sciencedirect.com/science/article/pii/S0168900217313414},
doi = {https://doi.org/10.1016/j.nima.2017.11.085},
issn = {0168-9002},
year = {2018},
date = {2018-01-01},
journal = {Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment},
volume = {884},
pages = {59-63},
abstract = {We discuss the potential for neutron spectrometers at novel accelerator driven compact neutron sources. Such a High Brilliance Source (HBS) relies on low energy nuclear reactions, which enable cryogenic moderators in very close proximity to the target and neutron optics at comparably short distances from the moderator compared to existing sources. While the first effect aims at increasing the phase space density of a moderator, the second allows the extraction of a large phase space volume, which is typically requested for spectrometer applications. We find that competitive spectrometers can be realized if (a) the neutron production rate can be synchronized with the experiment repetition rate and (b) the emission characteristics of the moderator can be matched to the phase space requirements of the experiment. MCNP simulations for protons or deuterons on a Beryllium target with a suitable target/moderator design yield a source brightness, from which we calculate the sample fluxes by phase space considerations for different types of spectrometers. These match closely the figures of todays spectrometers at medium flux sources. Hence we conclude that compact neutron sources might be a viable option for next generation neutron sources.},
keywords = {Neutron Source, Neutron spectrometer},
pubstate = {published},
tppubtype = {article}
}
We discuss the potential for neutron spectrometers at novel accelerator driven compact neutron sources. Such a High Brilliance Source (HBS) relies on low energy nuclear reactions, which enable cryogenic moderators in very close proximity to the target and neutron optics at comparably short distances from the moderator compared to existing sources. While the first effect aims at increasing the phase space density of a moderator, the second allows the extraction of a large phase space volume, which is typically requested for spectrometer applications. We find that competitive spectrometers can be realized if (a) the neutron production rate can be synchronized with the experiment repetition rate and (b) the emission characteristics of the moderator can be matched to the phase space requirements of the experiment. MCNP simulations for protons or deuterons on a Beryllium target with a suitable target/moderator design yield a source brightness, from which we calculate the sample fluxes by phase space considerations for different types of spectrometers. These match closely the figures of todays spectrometers at medium flux sources. Hence we conclude that compact neutron sources might be a viable option for next generation neutron sources.