The project “European Spallation Neutron Source (ESS)”: status of R&amp;D programme

Wagner, R.; Bräutigam, W.; Filges, D.; Ullmaier, H.

doi:10.1016/s0921-4526(99)01271-5

Cited by 7 publications

(4 citation statements)

References 8 publications

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“…This is a similar approach as used in least square fits. The minimum deviation is then defined by (3) where only those PMTs are considered, which are covered by the light cone (see Fig. 2).…”

Section: Position Reconstructionmentioning

confidence: 99%

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A new two-dimensional scintillation detector system for small-angle neutron scattering experiments

Kemmerling

Engels²,

Bussmann³

et al. 2001

IEEE Trans. Nucl. Sci.

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Abstract-A new two-dimensional position-sensitive detector system for small-angle neutron scattering experiments is under development. It is based on a 60 60 cm 2 large 6 Li-glass scintillator for the neutron capture and dispersion of the emitted light on an array of photomultiplier tubes for the derivation of the event position. For subthermal neutrons of 8 Å, an efficiency of 96% and a spatial resolution of 8 mm are to be achieved. Major improvements have been made in the signal-and data-processing branch, which aims at an electronical dead time of 1 s. A fast digitalization method using free-running analog-to-digital converters for each photomultiplier combined with field-programmable gate arrays for a parallel event detection in all channels has been applied. A subsequent farm of up to 16 floating-point digital signal processors is used to provide enough computing power for an improved reconstruction of the event position according to a maximum likelihood method.

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Section: Position Reconstructionmentioning

confidence: 99%

“…At future neutron facilities, like the research reactor FRM-II [2] or the European Spallation Source ESS [3], SANS will obtain a major improvement. The much higher neutron fluxes will lead to an intensity gain of at least one order of magnitude for SANS instruments, allowing a more detailed study of complex structures and fast processes.…”

mentioning

confidence: 99%

A new two-dimensional scintillation detector system for small-angle neutron scattering experiments

Kemmerling

Engels²,

Bussmann³

et al. 2001

IEEE Trans. Nucl. Sci.

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“…In Germany, mercury-containing radioactive wastes are mainly expected from research facilities, the exact amount however is unclear. A smaller experimental spallation facility was installed at the Cooler Synchrotron (COSY), the Jülich Experimental Spallation target Set-up in COSY Area (JESSICA) facility in Jülich that contains about 470 kg of elemental mercury [36][37][38]. Simulations have been performed to determine possible activation products that could be formed in this spallation target and lead to a variety of different radionuclides, including, next to radioactive isotopes of platinum, gold, iodine, etc., the formation of radioactive mercury isotopes that could not be separated from the bulk of the elemental mercury in the target.…”

Section: Introductionmentioning

confidence: 99%

Gamma-spectrometric measurement procedure for a clearance concept of radioactively contaminated mercury from nuclear facilities

Klass

Ritz

Hirsch

et al. 2021

J Radioanal Nucl Chem

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Radioactive mercury waste constitutes a significant challenge, as no approved disposal concept yet exists for such waste in Germany. This work describes a decontamination and measurement procedure for a possible clearance of mercury from nuclear facilities and release into reuse or conventional hazardous waste disposal to reduce the amount of mercury in a nuclear repository. The measurement setup and procedure were developed and evaluated including Monte-Carlo N-Particle® Transport Code (MCNP® and Monte Carlo N-Particle® are registered trademarks owned by Los Alamos National Security, LLC, manager and operator of Los Alamos National Laboratory, (Werner 2018, Werner 2017)), simulations to ensure conservative assumptions during the measurements. Results from decontaminated mercury samples show that a clearance pursuant to the German regulations would be feasible.

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“…At current and future neutron facilities, like the research reactor FRM-II [1], or the European Spallation Source ESS [2], Small Angle Neutron Scattering (SANS) will obtain a major improvement by the much higher neutron fluxes than previously delivered. This leads to an intensity gain of at least one order of magnitude for SANS instruments, allowing a more detailed study of complex structures and fast processes.…”

Section: Introductionmentioning

confidence: 99%

Characterization of the JUDIDT Readout Electronics for Neutron Detection

Fabbri,

Clemens,

Engels

et al. 2013

Preprint

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The Group for the development of neutron and gamma detectors in the Central Institute of Engineering, Electronics and Analytics (ZEA-2) at Forschungszentrum Jülich (FZJ) has developed, in collaboration with European institutes, an Anger Camera prototype for improving the impact point reconstruction of neutron tracks. The detector is a chamber filled with 3 He+CF4 gas for neutron capture and subsequent production of a tritium and a proton. The energy deposition by the ions gives rise to drifting electrons with an avalanche amplification as they approach a micro-strip anode structure. The scintillating light, generated during the electron drift and avalanche stage, is collected by four vacuum photomultipliers. The position reconstruction is performed via software algorithms. The JUDIDT readout electronics was modified at ZEA-2 to cope with the data acquisition requirements of the prototype. The results of the commissioning of the electronics are here presented and commented.

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The project “European Spallation Neutron Source (ESS)”: status of R&D programme

Cited by 7 publications

References 8 publications

A new two-dimensional scintillation detector system for small-angle neutron scattering experiments

A new two-dimensional scintillation detector system for small-angle neutron scattering experiments

Gamma-spectrometric measurement procedure for a clearance concept of radioactively contaminated mercury from nuclear facilities

Characterization of the JUDIDT Readout Electronics for Neutron Detection

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