Publication

@article{10.1063/5.0203509,

title = {Conceptual design of a macromolecular diffractometer for the Jülich high brilliance source},

author = {Z. Ma and K. Lieutenant and J. Voigt and T. E. Schrader and T. Gutberlet},

url = {https://doi.org/10.1063/5.0203509},

doi = {10.1063/5.0203509},

issn = {0034-6748},

year  = {2024},

date = {2024-01-01},

urldate = {2024-01-01},

journal = {Review of Scientific Instruments},

volume = {95},

number = {6},

pages = {065104},

abstract = {In this work, a concept for a neutron diffractometer for high-resolution macromolecular structures has been developed within the Jülich High Brilliance Neutron Source (HBS) project. The SELENE optics are adapted to the requirements of the instrument to achieve a tunable low background neutron beam at mm2 scale sample area. With the optimized guide geometry, a low background neutron beam can be achieved at the small sample area with tunable divergence and size. For the 1 × 1 mm2 sample, a flux of 1.10 × 107 n/s/cm2 for 0.38° divergence is calculated in the 2–4 Å wavelength range, which is about 84.6% of the flux at MaNDi of the high-power spallation source SNS at ORNL. Virtual neutron scattering experiments have been performed to demonstrate the instrument’s capabilities for studies of mm scale samples with large unit cells. Results of Vitesse simulations indicate that unit cell sizes of up to 200 Å are possible to be resolved with the proposed instrument.},

keywords = {Diffractometer, HBS, HiCANS, Instrumentation},

pubstate = {published},

tppubtype = {article}

}

@article{refId1,

title = {Development of neutron reflectometry for a HiCANS: The HERMES instrument at the JULIC Neutron Platform},

author = {Mariano Andrés Paulin and Ivan Pechenizkiy and Paul Zakalek and Klaus Lieutenant and Peter Kämmerling and Alexander Steffens and Harald Kleines and Ulrich Rücker and Thomas Gutberlet and Sébastien Gautrot and Alain Menelle and Frédéric Ott},

url = {https://doi.org/10.1051/epjconf/202429801001},

doi = {10.1051/epjconf/202429801001},

year  = {2024},

date = {2024-01-01},

urldate = {2024-01-01},

journal = {EPJ Web Conf.},

volume = {298},

pages = {01001},

keywords = {CANS, HBS, HiCANS, Instrumentation, Reflectometer},

pubstate = {published},

tppubtype = {article}

}

@article{refId20,

title = {Thermal moderator-reflector assembly for HBS},

author = {Ulrich Rücker and Ivan Pechenizkiy and Jingjing Li and Egor Vezhlev and Paul Zakalek and Jörg Voigt and Thomas Gutberlet and Thomas Brückel},

url = {https://doi.org/10.1051/epjconf/202429805008},

doi = {10.1051/epjconf/202429805008},

year  = {2024},

date = {2024-01-01},

journal = {EPJ Web Conf.},

volume = {298},

pages = {05008},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{refId15,

title = {The JULIC Neutron Platform, a testbed for HBS},

author = {Paul Zakalek and Johannes Baggemann and Jingjing Li and Ulrich Rücker and Thomas Gutberlet and Thomas Brückel},

url = {https://doi.org/10.1051/epjconf/202429805003},

doi = {10.1051/epjconf/202429805003},

year  = {2024},

date = {2024-01-01},

urldate = {2024-01-01},

journal = {EPJ Web Conf.},

volume = {298},

pages = {05003},

keywords = {CANS},

pubstate = {published},

tppubtype = {article}

}

@article{refId3,

title = {Ethane as a Neutron Moderator at Cryogenic Temperatures},

author = {Monia El Barbari and Ulrich Rücker and Alexander Schwab and Junyang Chen and Paul Zakalek and Jingjing Li and Thomas Gutberlet and Thomas Brückel},

url = {https://doi.org/10.1051/epjconf/202429801003},

doi = {10.1051/epjconf/202429801003},

year  = {2024},

date = {2024-01-01},

journal = {EPJ Web Conf.},

volume = {298},

pages = {01003},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{refId4,

title = {An Instrument Suite for the HBS},

author = {Jörg Voigt and Klaus Lieutenant},

url = {https://doi.org/10.1051/epjconf/202429801004},

doi = {10.1051/epjconf/202429801004},

year  = {2024},

date = {2024-01-01},

urldate = {2024-01-01},

journal = {EPJ Web Conf.},

volume = {298},

pages = {01004},

keywords = {HBS, HiCANS, Instrumentation},

pubstate = {published},

tppubtype = {article}

}

@article{refId9,

title = {Investigation of the mutual influence of multiple extraction channels for high-current accelerator-based neutron sources},

author = {Doruntin Shabani and Ulrich Rücker and Christoph Langer and Jingjing Li and Paul Zakalek and Norberto Schmidt and Thomas Gutberlet and Thomas Brückel},

url = {https://doi.org/10.1051/epjconf/202429803002},

doi = {10.1051/epjconf/202429803002},

year  = {2024},

date = {2024-01-01},

journal = {EPJ Web Conf.},

volume = {298},

pages = {03002},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2023-Chen,

title = {Thermal moderator-reflector design of the 24 Hz target station for the High Brilliance Neutron Source},

author = {Junyang Chen and Ulrich Rücker and Jörg Voigt and Paul Zakalek and Egor Vezhlev and Jingjing Li and Thomas Gutberlet and Thomas Brückel},

url = {https://doi.org/10.1051/epjconf/202328602005},

doi = {10.1051/epjconf/202328602005},

year  = {2023},

date = {2023-10-09},

urldate = {2023-01-01},

journal = {EPJ Web Conf.},

volume = {286},

pages = {02005},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2023-Zakalek.,

title = {The High Brilliance Neutron Source Target Stations},

author = {Paul Zakalek and Richard Achten and Johannes Baggemann and Yannick Beßler and Fabian Beule and Thomas Brückel and Junyang Chen and Qi Ding and Monia El-Barbari and Ralf Engels and Olaf Felden and Ralf Gebel and Kirill Grigoryev and Thomas Gutberlet and Romuald Hanslik and Vsevolod Kamerdzhiev and Peter Kämmerling and Harald Kleines and Jingjing Li and Klaus Lieutenant and Fynn Löchte and Eric Mauerhofer and Mariano Andrés Paulin and Ivan Pechenizkiy and Ulrich Rücker and Norberto Schmidt and Alexander Schwab and Alexander Steffens and Fréderic Ott and Yury Valdau and Egor Vezhlev and Jörg Voigt},

url = {https://doi.org/10.1051/epjconf/202328602004},

year  = {2023},

date = {2023-10-09},

urldate = {2023-01-01},

journal = {EPJ Web Conf.},

volume = {286},

pages = {02004},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2023-Brueckel-2,

title = {The High Brilliance neutron Source (HBS): A project for a next generation neutron research facility},

author = {Thomas Brückel and Thomas Gutberlet and Johannes Baggemann and Junyang Chen and Tania Claudio-Weber and Qi Ding and Monia El-Barbari and Jingjing Li and Klaus Lieutenant and Eric Mauerhofer and Ulrich Rücker and Norberto Schmidt and Alexander Schwab and Jörg Voigt and Paul Zakalek and Yannick Bessler and Romuald Hanslik and Richard Achten and Fynn Löchte and Mathias Strothmann and Olaf Felden and Ralf Gebel and Andreas Lehrach and Marius Rimmler and Holger Podlech and Oliver Meusel and Frédéric Ott and Alain Menelle and Mariano Andrés Paulin},

url = {https://doi.org/10.1051/epjconf/202328602003},

doi = {10.1051/epjconf/202328602003},

year  = {2023},

date = {2023-10-09},

urldate = {2023-01-01},

journal = {EPJ Web Conf.},

volume = {286},

pages = {02003},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Ruecker2023,

title = {DiffMod - statistical 2D simulation model of neutron propagation and moderation},

author = {Ulrich Rücker and Paul Zakalek and Jingjing Li and Jörg Voigt and Thomas Gutberlet and Thomas Brückel},

issn = {1477-2655},

year  = {2023},

date = {2023-01-01},

journal = {Journal of Neutron Research},

volume = {25},

pages = {53–60},

publisher = {IOS Press},

abstract = {DiffMod is a simulation program for the evolution of a neutron ensemble in a thermal target - moderator - reflector assembly of a pulsed neutron source based on the statistical description of diffusion, scattering, moderation, and absorption processes. The spatial resolution, the energy resolution and the diffusion directions are strongly restricted to achieve calculation times in a realistic moderator - reflector assembly below 1 hour. In comparison with Monte-Carlo simulations describing the geometry and interactions between neutrons and moderator material exactly, we prove that the DiffMod approach can deliver intensities and pulse shapes that are exact within 10% compared to the Monte-Carlo simulations that require much more computing power. In addition, a time-resolved illustration of the spatial distribution of the neutrons at different energy levels is provided.},

keywords = {neutron diffusion, neutron reflector, Neutron transport simulation, pulsed neutron source, thermal neutron moderator},

pubstate = {published},

tppubtype = {article}

}

@article{Ding2023,

title = {An optimized microchannel Ta target for high-current accelerator-driven neutron sources},

author = {Qi Ding and Ulrich Rücker and Paul Zakalek and Johannes Baggemann and Jörg Wolters and Jingjing Li and Yannick Beßler and Thomas Gutberlet and Thomas Brückel and Ghaleb Natour},

url = {https://www.sciencedirect.com/science/article/pii/S0168900222008002},

doi = {https://doi.org/10.1016/j.nima.2022.167508},

issn = {0168-9002},

year  = {2023},

date = {2023-01-01},

urldate = {2023-01-01},

journal = {Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment},

volume = {1045},

pages = {167508},

abstract = {An optimized neutron producing tantalum target with an optimized internal microchannel cooling was developed for a 70 MeV proton beam with a peak current of 100 mA, a duty cycle of 1.43% and an average power of 100 kW on a target surface area of 100 cm 2. In this work a target with microchannel cooling structure is described which matches with the proton’s energy to minimize hydrogen implantation and to produce energy deposition with optimum homogeneity inside the target to minimize the thermal stresses. For the purpose of getting an optimal target design, the investigations of energy deposition, proton fluence, the spatial distribution of (p, n) reactions and the spatial distribution of stopping protons of the target with different microchannel geometries were performed with the particle transport code FLUKA. The resulting design produces a homogeneous proton fluence and energy deposition without hot spots. Furthermore, only 4.4% of the impinging protons accumulate in the metal target, which significantly decreases the risk of hydrogen embrittlement and blistering.},

keywords = {FLUKA, HBS, HiCANS, Microchannel cooling, Monte Carlo Simulations, Proton beam, Target},

pubstate = {published},

tppubtype = {article}

}

@article{2023-Brueckel,

title = {Brillante Neutronenstrahlen - Eine neue Generation von Neutronenquellen für Wissenschaft und Industrie},

author = {Thomas Brückel and Thomas Gutberlet and Paul Zakalek},

url = {https://juser.fz-juelich.de/record/1006962},

issn = {1617-9439},

year  = {2023},

date = {2023-01-01},

journal = {Physik-Journal},

volume = {22},

number = {5},

pages = {7},

publisher = {Wiley-VCH},

address = {Weinheim},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2023-Jaksch,

title = {The GISANS instrument at the HBS},

author = {Sebastian Jaksch and Klaus Lieutenant and Earl Babcock and Henrich Frielinghaus},

url = {https://www.sciencedirect.com/science/article/pii/S0168900222012116},

doi = {https://doi.org/10.1016/j.nima.2022.167919},

issn = {0168-9002},

year  = {2023},

date = {2023-01-01},

journal = {Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment},

volume = {1048},

pages = {167919},

abstract = {This manuscript describes a concept of a grazing incidence small-angle neutron scattering (GISANS) instrument for the high brilliance source (HBS). The HBS being a compact pulsed neutron source using a moderate energy proton accelerator which allows for very compact moderators and shielding, and flexible pulse repetition rates. Similar to many other instrument concepts for this source, the lowest proposed HBS pulse frequency of 24 Hz with a relatively large detector distance is the optimal choice for the instrument described here in terms of obtained intensity and Q-range (i.e. scattering vector range). Such a configuration has the added advantage of good Q-resolution, which is important when scattering depths need to be resolved well. This is especially the case for GISANS when the incident angle is close to the critical angle of total reflection. The performance obtained from detailed ray-tracing computer simulations predict a high performance instrument that will be comparable to reflectometers and small angle neutron scattering (SANS) instruments at high-flux reactor sources such as the Forschungsreaktor Munich (FRM-2) and others.},

keywords = {Grazing incidence small-angle neutron scattering, Instrumentation, Neutron reflectometry, Pulsed source, Ray-tracing computer simulations},

pubstate = {published},

tppubtype = {article}

}

@article{Gutberlet2022,

title = {Instrumentation Workshop – Best Instruments for the Future Neutron Facility HBS},

author = {T. Gutberlet and J. Voigt},

url = {https://doi.org/10.1080/10448632.2022.2108664},

doi = {10.1080/10448632.2022.2108664},

year  = {2022},

date = {2022-01-01},

journal = {Neutron News},

volume = {33},

number = {4},

pages = {2-3},

publisher = {Taylor & Francis},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2021-Ophoven,

title = {Monte Carlo simulation of proton- and neutron-induced radiation damage in a tantalum target irradiated by 70 MeV protons},

author = {Niklas Ophoven and Eric Mauerhofer and Jingjing Li and Ulrich Rücker and Paul Zakalek and Johannes Baggemann and Thomas Gutberlet and Thomas Brückel and Christoph Langer},

url = {https://doi.org/10.1007/s00339-021-04713-4},

issn = {1432-0630},

year  = {2021},

date = {2021-07-01},

journal = {Applied Physics A},

volume = {127},

number = {8},

pages = {576},

abstract = {Beams of free neutrons are an important probe to analyze the structure and dynamics of condensed matter and are produced at neutron research reactors, neutron spallation sources or compact accelerator-based neutron sources (CANS). An efficient construction of CANS with a maximized neutron yield and brilliance requires reliable knowledge of the consequences of radiation-induced material damage, the predominating bottleneck of a target’s lifetime. In the framework of the Jülich High-Brilliance neutron Source project, the impact of proton- and neutron-induced material damage of a tantalum target was investigated. The Monte Carlo codes FLUKA and SRIM were utilized to extract the number of displacements per atom resulting from atomic rearrangements. The simulations performed distinctly identify the rear of the neutron target as the most vulnerable area, with the protons as main damage contributors. The minor contribution of neutrons is a material-specific phenomenon due to their high mean free path length in tantalum. Numerical results of the simulations served to calculate average and peak damage rates $$R_mathrmd$$(dpa/s), both in turn scaled to annual displacement doses for continuous operation in a full power year (dpa/fpy). Supplemented by the literature, a minimum target lifetime $$tau _min $$of 2.6 years (33 Ah) is concluded.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2021-Rimmler,

title = {Determination of the neutron yield of Be, V and Ta targets irradiated with protons (22-42MeV) by means of prompt gamma neutron activation analysis},

author = {Marius Rimmler and Johannes Baggemann and Sarah Böhm and Paul-Emmanuel Doege and Olaf Felden and Nils-Oliver Fröhlich and Ralf Gebel and Jiatong Li and Jingjing Li and Eric Mauerhofer and Ulrich Rücker and Mathias Strothmann and Yury Valdau and Paul Zakalek and Thomas Gutberlet and Thomas Brückel},

url = {https://www.sciencedirect.com/science/article/pii/S0168900220313863},

doi = {https://doi.org/10.1016/j.nima.2020.164989},

issn = {0168-9002},

year  = {2021},

date = {2021-01-01},

journal = {Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment},

volume = {990},

pages = {164989},

abstract = {The neutron yield for beryllium, vanadium and tantalum irradiated with 22, 27, 33 and 42MeV protons is indirectly determined by Prompt Gamma Neutron Activation Analysis (PGNAA). The neutron-to-gamma conversion rate is measured with an AmBe calibration neutron source. Corrections by escaped neutrons are applied via MCNP simulations of the experiment using the ENDF/B-VII.1 database. The experimental results are in good agreement with the neutron yield obtained from simulations deviating by 0.4% to 13%.},

keywords = {Be, Neutron yield, PGNAA, Target},

pubstate = {published},

tppubtype = {article}

}

@article{Zakalek2021,

title = {Tailoring neutron beam properties by target-moderator-reflector optimisation},

author = {Paul Zakalek and Jingjing Li and Sarah Böhm and Ulrich Rücker and Jörg Voigt and Eric Mauerhofer and Thomas Gutberlet and Thomas Brückel},

issn = {1477-2655},

year  = {2021},

date = {2021-01-01},

journal = {Journal of Neutron Research},

volume = {23},

pages = {185–200},

publisher = {IOS Press},

abstract = {Compact accelerator-driven neutron sources allow to operate multiple optimised target-moderator-reflector (TMR) units adapted to the requirements of the respective instruments. The compact design of the TMR units allows an efficient coupling of neutron production, neutron moderation and extraction, but requires a novel way of optimisation. The neutronic performance of different TMR units based on polyethylene, heavy water and a mixture of heavy and light water moderators together with Pb and Be reflectors and a borated polyethylene absorber is discussed. Extraction channels for thermal and cold neutrons are investigated regarding the energy and time spectra.},

keywords = {CANS, NEUTRONS, TMR optimisation},

pubstate = {published},

tppubtype = {article}

}

@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}

}

@article{Ma2021,

title = {Performance of neutron guide systems for low energy accelerator-driven neutron facilities},

author = {Z. Ma and K. Lieutenant and J. Voigt and T. Gutberlet and M. Feygenson and T. Brückel},

url = {https://www.sciencedirect.com/science/article/pii/S0168900221004642},

doi = {https://doi.org/10.1016/j.nima.2021.165479},

issn = {0168-9002},

year  = {2021},

date = {2021-01-01},

journal = {Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment},

volume = {1009},

pages = {165479},

abstract = {Low Energy accelerator-driven Neutron Facilities have the potential to become competitive to research reactors and spallation sources to generate neutron beams for scattering experiments. A low energy accelerator-driven neutron facility is developed at the Jülich Centre for Neutron Science. This source is expected to provide thermal and cold neutrons with high brilliance and is therefore called “High Brilliance neutron Source” (HBS). In this work, we study the performance of neutron guide systems at HBS by using neutron ray-tracing simulations. Elliptical and ballistic guides with elliptic diverging/converging section have been used in simulations for various moderator-to-guide distances and guide entrance cross-sections. Results show that the beam properties have a strong dependence on the distance between guide entry and moderator. We demonstrate that the ballistic guide system can achieve a comparable neutron flux and brilliance transfer as the true elliptical guide for thermal neutrons if a proper distance between guide entrance and moderator is chosen. For low-divergence cold neutrons, the selected ballistic guide is showing even better performance than the elliptical one.},

keywords = {Low energy accelerator-driven neutron facility, Neutron guide, Neutron ray-tracing simulation, VITESS},

pubstate = {published},

tppubtype = {article}

}

@article{2020-Rimmler-2,

title = {Proton Beam Multiplexer Developments for Multi-Target Operation at the High-Brilliance Neutron Source HBS},

author = {Marius Rimmler and Johannes Baggemann and Paul Doege and Olaf Felden and Eric Mauerhofer and Ulrich Rücker and Helmut Soltner and Raimund Tölle and Paul Zakalek and Ralf Gebel and Thomas Gutberlet and Thomas Brückel},

url = {https://doi.org/10.1051/epjconf/202023102002},

doi = {10.1051/epjconf/202023102002},

year  = {2020},

date = {2020-01-01},

journal = {EPJ Web Conf.},

volume = {231},

pages = {02002},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2020-Eisenhut,

title = {Cryostat for the provision of liquid hydrogen with a variable ortho-para ratio for a low-dimensional cold neutron moderator},

author = {Sebastian Eisenhut and Marcel Klaus and Johannes Baggemann and Ulrich Rücker and Yannick Beßler and Alexander Schwab and Christoph Haberstroh and Tobias Cronert and Thomas Gutberlet and Thomas Brückel and Carsten Lange},

url = {https://doi.org/10.1051/epjconf/202023104001},

doi = {10.1051/epjconf/202023104001},

year  = {2020},

date = {2020-01-01},

journal = {EPJ Web Conf.},

volume = {231},

pages = {04001},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2020-Zakalek,

title = {Energy and target material dependence of the neutron yield induced by proton and deuteron bombardment},

author = {Paul Zakalek and Paul-Emmanuel Doege and Johannes Baggemann and Eric Mauerhofer and Thomas Brückel},

url = {https://doi.org/10.1051/epjconf/202023103006},

doi = {10.1051/epjconf/202023103006},

year  = {2020},

date = {2020-01-01},

journal = {EPJ Web Conf.},

volume = {231},

pages = {03006},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2020-Brueckel,

title = {Low energy accelerator-driven neutron facilities—A prospect for a brighter future for research with neutrons},

author = {Sebastian Schmidt Thomas Gutberlet Thomas Brückel and Alain Menelle},

url = {https://doi.org/10.1080/10448632.2020.1819125},

doi = {10.1080/10448632.2020.1819125},

year  = {2020},

date = {2020-01-01},

journal = {Neutron News},

volume = {31},

number = {2-4},

pages = {13-18},

publisher = {Taylor & Francis},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2020-Gutberlet,

title = {Sustainable neutrons for today and tomorrow—The Jülich High Brilliance neutron Source project},

author = {E. Mauerhofer U. Rücker T. Gutberlet and T. Brückel},

url = {https://doi.org/10.1080/10448632.2020.1819132},

doi = {10.1080/10448632.2020.1819132},

year  = {2020},

date = {2020-01-01},

journal = {Neutron News},

volume = {31},

number = {2-4},

pages = {37-43},

publisher = {Taylor & Francis},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Gutberlet2019,

title = {The Jülich high brilliance neutron source project – Improving access to neutrons},

author = {T. Gutberlet and U. Rücker and P. Zakalek and T. Cronert and J. Voigt and J. Baggemann and P. -E. Doege and E. Mauerhofer and S. Böhm and J. P. Dabruck and R. Nabbi and M. Butzek and M. Klaus and C. Lange and T. Brückel},

url = {https://www.sciencedirect.com/science/article/pii/S0921452618300280},

doi = {https://doi.org/10.1016/j.physb.2018.01.019},

issn = {0921-4526},

year  = {2019},

date = {2019-01-01},

journal = {Physica B: Condensed Matter},

volume = {570},

pages = {345-348},

abstract = {With the construction of the ESS, the European neutron user community is eagerly awaiting the commissioning of the brightest neutron source worldwide in 2021. Parallel to this, there is however the ongoing development of neutron science being undertaken at a dwindling number of neutron facilities worldwide. The Jülich Centre for Neutron Science has started a project to develop and design compact accelerator-driven high brilliance neutron sources as an efficient and cost effective alternative to the current low- and medium-flux reactor and spallation sources with the potential to offer science and industry access to neutrons. The project aims to deliver a high brilliance neutron source (HBS), consisting of a compact neutron production and moderator system which provides thermal and cold neutrons with high brilliance efficiently extracted in an optimized neutron transport system. By shaping the experiment holistically from the source to the detector, neutron experiments could be set-up for specific scientific requirements in a flexible and efficient way for the neutron user.},

keywords = {Neutron instruments, Neutron moderation, Neutron optics, Neutron sources, Neutron Target, Nuclear reaction},

pubstate = {published},

tppubtype = {article}

}

@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}

}

@article{Zakalek2018,

title = {Temperature profiles inside a target irradiated with protons or deuterons for the development of a compact accelerator driven neutron source},

author = {P. Zakalek and P. -E. Doege and J. Baggemann and T. Cronert and Y. Beßler and M. Butzek and J. Wolters and E. Mauerhofer and U. Rücker and T. Gutberlet and G. Natour and Th. Brückel},

url = {https://www.sciencedirect.com/science/article/pii/S0921452618300796},

doi = {https://doi.org/10.1016/j.physb.2018.01.049},

issn = {0921-4526},

year  = {2018},

date = {2018-01-01},

journal = {Physica B: Condensed Matter},

volume = {551},

pages = {484-487},

abstract = {The neutron yield of a compact accelerator driven neutron source depends strongly on the target performance. This performance is influenced by the target composition and geometry, the cooling system design and which primary particles are used. We show that the temperature difference inside the target depends directly on the target thickness determined by the ion stopping range and therefore on the type and energy of the primary particle. Deuterons with a larger stopping power show a smaller temperature difference inside the target than protons allowing thus for a better target cooling.},

note = {The 11th International Conference on Neutron Scattering (ICNS 2017)},

keywords = {Compact accelerator driven neutron sources, Deuteron, Neutron production, proton, Target},

pubstate = {published},

tppubtype = {article}

}

@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}

}

@article{2018-Cronert,

title = {Compact and easy to use mesitylene cold neutron moderator for CANS},

author = {T. Cronert and J. P. Dabruck and M. Klaus and C. Lange and P. Zakalek and P. -E. Doege and J. Baggemann and Y. Beßler and M. Butzek and U. Rücker and T. Gutberlet and R. Nabbi and T. Brückel},

url = {http://www.sciencedirect.com/science/article/pii/S0921452618300255},

doi = {https://doi.org/10.1016/j.physb.2018.01.016},

issn = {0921-4526},

year  = {2018},

date = {2018-01-01},

journal = {Physica B: Condensed Matter},

volume = {551},

pages = {377 - 380},

abstract = {Organic aromatic cold neutron moderators - like mesitylene (C9H12) - are often much more convenient to handle and to commission than cryogenic methane or ortho/para hydrogen moderators. Although this benefit comes at the cost of reduced brilliance, mesitylene moderators are suited to enable cold neutron applications at sources where a complex traditional cold moderator system is not feasible. Developing the Jülich High Brilliance neutron Source (HBS) project, we have investigated the use of such a low-dimensional mesitylene moderator with MCNP and ANSYS simulations and validated the simulations with experiments at TU Dresden's AKR-2 reactor. Here we will document the feasibility, advantages and drawbacks of such a system and give an outlook on future optimization potentials.},

note = {The 11th International Conference on Neutron Scattering (ICNS 2017)},

keywords = {CANS, Cold neutron moderators, Mesitylene, Moderation, Neutron sources},

pubstate = {published},

tppubtype = {article}

}

@article{ThomasGutberlet2017,

title = {Towards Compact Accelerator Driven Neutronsources for Europe},

author = {Thomas Gutberlet and Ulrich Rücker and Thomas Brückel},

url = {https://doi.org/10.1080/10448632.2017.1342486},

doi = {10.1080/10448632.2017.1342486},

year  = {2017},

date = {2017-01-01},

journal = {Neutron News},

volume = {28},

number = {3},

pages = {20-25},

publisher = {Taylor & Francis},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2016-Cronert,

title = {High brilliant thermal and cold moderator for the HBS neutron source project Jülich},

author = {Tobias Cronert and Jan Philipp Dabruck and Paul Emmanuel Doege and Yannick Bessler and M Klaus and M Hofmann and Paul Zakalek and Ulrich Rücker and C Lange and M Butzek and W Hansen and R Nabbi and Thomas Brückel},

url = {https://doi.org/10.1088/1742-6596/746/1/012036},

doi = {10.1088/1742-6596/746/1/012036},

year  = {2016},

date = {2016-09-01},

urldate = {2016-09-01},

journal = {Journal of Physics: Conference Series},

volume = {746},

pages = {012036},

publisher = {IOP Publishing},

abstract = {The proposed High Brilliance Neutron Source (HBS), recognized within the Helmholtz Association of German Research Centres, will optimize the entire chain from particle source through particle accelerator, target, moderator, reflector, shielding, beam extraction, beam transport all the way to the detector, utilizing the nuclear Be(p,n) or Be(d,n) reaction in the lower MeV energy range. A D2O moderating reflector prototype (MRP) and a cold source were constructed and build according to MCNP parameter studies. The MRP was tested in a feasibility study at the TREFF instrument at MLZ (Garching). Cold beam extraction from the flux maximum within the moderator based on liquid para H2 and other cold moderators will be tested by energy spectroscopy via TOF-method. Different ratios of liquid ortho/para H2 will be fed to the cold moderator. The ratio will be controlled by feeding from reservoires of natural liquid H2 and a storage loop with an ortho/para converter and determined via online heat capacity measurement.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2016-Ruecker,

title = {The Jülich high-brilliance neutron source project},

author = {U. Rücker and T. Cronert and J. Voigt and J. P. Dabruck and P. -E. Doege and J. Ulrich and R. Nabbi and Y. Beßler and M. Butzek and M. Büscher and C. Lange and M. Klaus and T. Gutberlet and T. Brückel},

url = {https://doi.org/10.1140/epjp/i2016-16019-5},

doi = {10.1140/epjp/i2016-16019-5},

issn = {2190-5444},

year  = {2016},

date = {2016-01-29},

journal = {The European Physical Journal Plus},

volume = {131},

number = {1},

pages = {19},

abstract = {With the construction of the European Spallation Source ESS, the European neutron user community is looking forward to the brightest source worldwide. At the same time there is an ongoing concentration of research with neutrons to only a few but very powerful neutron facilities. Responding to this situation the Jülich Centre for Neutron Science has initiated a project for a compact accelerator driven high-brilliance neutron source, optimized for neutron scattering on small samples and to be realized at reasonable costs. The project deals with the optimization of potential projectiles, target and moderator concepts, versatile accelerator systems, cold sources, beam extraction systems and optimized instrumentation. A brief outline of the project, the achievements already reached, will be presented, as well as a vision for the future neutron landscape in Europe.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}