2023
1.
Ding, Qi; Rücker, Ulrich; Zakalek, Paul; Baggemann, Johannes; Wolters, Jörg; Li, Jingjing; Beßler, Yannick; Gutberlet, Thomas; Brückel, Thomas; Natour, Ghaleb
An optimized microchannel Ta target for high-current accelerator-driven neutron sources Journal Article
In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 1045, pp. 167508, 2023, ISSN: 0168-9002.
Abstract | Links | BibTeX | Tags: FLUKA, HBS, HiCANS, Microchannel cooling, Monte Carlo Simulations, Proton beam, Target
@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}
}
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.
2021
2.
Rimmler, Marius; Baggemann, Johannes; Böhm, Sarah; Doege, Paul-Emmanuel; Felden, Olaf; Fröhlich, Nils-Oliver; Gebel, Ralf; Li, Jiatong; Li, Jingjing; Mauerhofer, Eric; Rücker, Ulrich; Strothmann, Mathias; Valdau, Yury; Zakalek, Paul; Gutberlet, Thomas; Brückel, Thomas
In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 990, pp. 164989, 2021, ISSN: 0168-9002.
Abstract | Links | BibTeX | Tags: Be, Neutron yield, PGNAA, Target
@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}
}
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%.