Paul Zakalek
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View article: Phase transitions in rutile-related V <sub>0.92</sub> O <sub>2</sub> synthesized at high pressures and temperatures
Phase transitions in rutile-related V <sub>0.92</sub> O <sub>2</sub> synthesized at high pressures and temperatures Open
Structural phase transitions in metastable rutile-related V 0.92 O 2 synthesized at 10 GPa and 1273 K were studied with single-crystal X-ray diffraction in the temperature range 110–500 K and at pressures up to 9.2 GPa. V 0.92 O 2 starts t…
View article: Evaluation of neutron dose rates at the HBS prototype target station
Evaluation of neutron dose rates at the HBS prototype target station Open
At Forschungszentrum Jülich, the High Brilliance Neutron Source (HBS) project aims to provide a efficient source for various scattering, analytical and imaging applications in science and industry under the concept of High-Current Accelera…
View article: Toward the design of a very cold neutron source for the High Brilliance Source
Toward the design of a very cold neutron source for the High Brilliance Source Open
In contrast to the moderator designs typical of large reactor and spallation sources, high-current accelerator-driven neutron sources, with smaller source dimensions, necessitate highly efficient and compact moderator solutions. At the Hig…
View article: High Current Accelerator-driven Neutron Sources - The HBS project for a next generation neutron facility
High Current Accelerator-driven Neutron Sources - The HBS project for a next generation neutron facility Open
Background Research with neutrons usually relies on fission-based research reactors or neutron spallation sources to provide neutron beams for scientific and industrial applications. In recent years a novel way for the production of brilli…
View article: High Current Accelerator-driven Neutron Sources - The HBS project for a next generation neutron facility
High Current Accelerator-driven Neutron Sources - The HBS project for a next generation neutron facility Open
Background Research with neutrons is usually related to the use of fission-based research reactors or neutron spallation sources to offer neutron beams for science and industry. In recent years a novel way for the production of brilliant c…
View article: High Current Accelerator-driven Neutron Sources - The HBS project for a next generation neutron facility
High Current Accelerator-driven Neutron Sources - The HBS project for a next generation neutron facility Open
Background Research with neutrons is usually related to the use of fission-based research reactors or neutron spallation sources to offer neutron beams for science and industry. In recent years a novel way for the production of brilliant c…
View article: Development of an epithermal and fast neutron target station for the High Brilliance Neutron Source
Development of an epithermal and fast neutron target station for the High Brilliance Neutron Source Open
The conceptual design of an epithermal and fast neutron target–moderator–reflector (TMR) unit for the High Brilliance Neutron Source (HBS) project is presented. A total of 450 simulations with the Monte Carlo code were analyzed to explore …
View article: Benchmarking of the PHITS simulation code using neutron activation experiments for reliable calculations of neutron fields
Benchmarking of the PHITS simulation code using neutron activation experiments for reliable calculations of neutron fields Open
In this study, experimental results from neutron activation of gold and indium foils are compared with the activation simulated using PHITS and PHITS-DCHAIN codes. The aim was to evaluate the accuracy of these simulation methods for predic…
View article: Monte Carlo simulations of cold neutron spectra for various para- and ortho-hydrogen ratios using different codes and nuclear data libraries
Monte Carlo simulations of cold neutron spectra for various para- and ortho-hydrogen ratios using different codes and nuclear data libraries Open
This work compares simulated and measured neutron time-of-flight spectra for a cold neutron moderator with varying para-hydrogen concentrations (25%, 50%, 90% and 99.9%) embedded in a polyethylene thermal moderator. The primary neutrons ar…
View article: HighNESS conceptual design report: Volume I
HighNESS conceptual design report: Volume I Open
The European Spallation Source, currently under construction in Lund, Sweden, is a multidisciplinary international laboratory. Once completed to full specifications, it will operate the world’s most powerful pulsed neutron source. Supporte…
View article: HighNESS conceptual design report: Volume II. The NNBAR experiment.
HighNESS conceptual design report: Volume II. The NNBAR experiment. Open
A key aim of the HighNESS project for the European Spallation Source is to enable cutting-edge particle physics experiments. This volume presents a conceptual design report for the NNBAR experiment. NNBAR would exploit a new cold lower mod…
View article: The JULIC Neutron Platform, a testbed for HBS
The JULIC Neutron Platform, a testbed for HBS Open
The JULIC Neutron Platform was set up at the COSY facility in Jülich as a testbed for the HBS project. Its center is a target station prototype using a tantalum target and a 45 MeV proton beam with a maximum beam power of a few watts. Eigh…
View article: Investigation of the mutual influence of multiple extraction channels for high-current accelerator-based neutron sources
Investigation of the mutual influence of multiple extraction channels for high-current accelerator-based neutron sources Open
The High Brilliance neutron Source (HBS) project pioneers a High-Current Accelerator-Based Neutron Source (HiCANS), optimizing elements for tailored neutron production. HBS adapts pulse structure and moderators to instrument requirements, …
View article: Beam Dynamics Studies for the Target Beamlines of the High Brilliance Neutron Source
Beam Dynamics Studies for the Target Beamlines of the High Brilliance Neutron Source Open
The High Brilliance Neutron Source (HBS) belongs to the class of High Current Accelerator based Neutron Sources (Hi-CANS). The driver Linac for the HBS must be able to reliably accelerate a 100 mA proton beam to an energy of 70 MeV [2, 1, …
View article: Thermal moderator-reflector assembly for HBS
Thermal moderator-reflector assembly for HBS Open
The thermal moderator is the key component in a research neutron source to convert the primary neutrons which typically have energies in the MeV regime into useful neutrons for investigations with energies well below 1 eV. In the case of a…
View article: Ethane as a Neutron Moderator at Cryogenic Temperatures
Ethane as a Neutron Moderator at Cryogenic Temperatures Open
The study’s objective is to examine the neutron temperature response, using liquid and solid ethane at various cryogenic temperatures to evaluate the effectiveness of ethane as a cold neutron moderator in compact moderator systems. The exp…
View article: Development of neutron reflectometry for a HiCANS: The HERMES instrument at the JULIC Neutron Platform
Development of neutron reflectometry for a HiCANS: The HERMES instrument at the JULIC Neutron Platform Open
High Current Compact Accelerator-driven Neutron Sources (HiCANS) have recently emerged as a possible solution to the drop in neutron provision in Europe due to the closure of several research reactors. Within this new trend, the Laboratoir…
View article: HighNESS Conceptual Design Report: Volume I
HighNESS Conceptual Design Report: Volume I Open
The European Spallation Source, currently under construction in Lund, Sweden, is a multidisciplinary international laboratory. Once completed to full specifications, it will operate the world's most powerful pulsed neutron source. Supporte…
View article: Thermal moderator-reflector design of the 24 Hz target station for the High Brilliance Neutron Source
Thermal moderator-reflector design of the 24 Hz target station for the High Brilliance Neutron Source Open
The High Brilliance Neutron Source (HBS) project develops a high current accelerator driven neutron source (HiCANS), aiming to substitute existing neutron research reactors, that reach the end of life. This study focuses on the thermal neu…
View article: The HERMES reflectometer at the JULIC Neutron Platform
The HERMES reflectometer at the JULIC Neutron Platform Open
HERMES is a time-of-flight reflectometer that operated at the Orphée reactor until 2019. In 2022, HERMES was installed at the JULIC (Jülich Light Ion Cyclotron) Neutron Platform as part of a collaboration between the Laboratoire Léon Brill…
View article: The High Brilliance Neutron Source Target Stations
The High Brilliance Neutron Source Target Stations Open
High Current Accelerator driven Neutron Sources (HiCANS) are a cost-efficient alternative for future large scale neutron facilities. They excel in transforming neutrons released by the primary nuclear reaction into a spectral range usable …
View article: The High Brilliance neutron Source (HBS): A project for a next generation neutron research facility
The High Brilliance neutron Source (HBS): A project for a next generation neutron research facility Open
The High Brilliance neutron Source (HBS) is a project for a next generation neutron research facility, based on new concepts and recent technological advancements. As elementary processes it uses neither fission nor spallation, but instead…
View article: Monte Carlo simulation of proton- and neutron-induced radiation damage in a tantalum target irradiated by 70 MeV protons
Monte Carlo simulation of proton- and neutron-induced radiation damage in a tantalum target irradiated by 70 MeV protons Open
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 effic…
View article: Determination of the neutron yield of Be, V and Ta targets irradiated with protons (22-42 MeV) by means of prompt gamma neutron activation analysis
Determination of the neutron yield of Be, V and Ta targets irradiated with protons (22-42 MeV) by means of prompt gamma neutron activation analysis Open
The neutron yield for beryllium, vanadium and tantalum irradiated with 22, 27, 33 and 42 MeV protons is indirectly determined by Prompt Gamma Neutron Activation Analysis (PGNAA). The neutron-to-gamma conversion rate is measured with an AmB…
View article: RBS raw data for publication "Tuning the Co/Sr stoichiometry of SrCoO2.5 thin films by RHEED assisted MBEgrowth"
RBS raw data for publication "Tuning the Co/Sr stoichiometry of SrCoO2.5 thin films by RHEED assisted MBEgrowth" Open
RBS raw date for publication "Tuning the Co/Sr stoichiometry of SrCoO2.5 thin films by RHEED assisted MBEgrowth" Simulation results using SIMNRA included as well