Development of a neutron time-of-flight source at the ELBE accelerator

Klug, J.; Altstadt, E.; Beckert, C.; Beyer, R.; Freiesleben, H.; Greschner, M.; Grosse, E.; Junghans, A. R.; Naumann, B.; Noack, K.; Schneider, S.; Seidel, K.; Wagner, A.; Weiß, Frank-Peter

doi:10.1088/1742-6596/41/1/032

Cited by 4 publications

(6 citation statements)

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“…Using the liquid lead for the target material to produce neutrons is not new. At the Helmholtz Zentrum Dresden Rossendorf (HZDR) [6], they use a liquid lead target to produce a neutron beam and produce a good performance in the nuclear data measurement field. An electron beam is incident at the molybdenum tube, which is located inside the vacuum chamber shown in Figure 6.…”

Section: Heat Analysismentioning

confidence: 99%

Detailed Analysis of the KAERI nTOF Facility

Kim

Lee

2016

J Radiat Prot Res

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Background: A project for building a neutron time-of-flight (nTOF) facility is progressing. We expect that the construction will start in early 2016. Before that, a detailed simulation based on the current architectural drawings was performed to optimize the performance of our facility. Materials and Methods: Currently, several parts had been modified or changed from the original design to reflect requirements such as the layout of the electron beam line, shape of the vacuum chamber producing a neutron beam, and the underground layout of the nTOF facility. Detailed analysis for these modifications has been done with MCNP simulation. Results and Discussion: An overview of our photo-neutron source and KAERI nTOF facility were introduced. The numerical simulations for heat deposition, source term, and radiation shielding of KAERI nTOF facility were performed and the results are discussed. Conclusion: We are expecting that the construction of the KAERI nTOF facility will start in early 2016, and these results will be used as basic data.

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Section: Heat Analysismentioning

confidence: 99%

Detailed Analysis of the KAERI nTOF Facility

Kim

Lee

2016

J Radiat Prot Res

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“…The electron beam will have an enhanced energy up to 50 MeV and will hit the photo-neutron source travelling along a line at 1.8 m from the floor (40 cm higher respect to the normal electron line). After 1 m flight the selected neutron beam will enter the collimator inserted in a heavy concrete wall (52% Fe, density 3.6 g/cm 3 ), which will be 2.5 m long. The beam will enter then the experimental room, which will be considerably larger then the actual one and therefore less affected from the background due to the neutron scattering in the room.…”

Section: -P2mentioning

confidence: 99%

“…Moreover, a longer flight path (the room is about 9.5 m long) will be available for TOF measurements. The walls of the experimental room, as well as the roof, will be in normal concrete (density 2.6 g/cm 3 ) while all the walls around the photo-neutron source will be in heavy concrete and 2.5 m long, as the one containing the collimator.…”

Section: -P2mentioning

confidence: 99%

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Optimization aspects of the new nELBE photo-neutron source

Ferrari

Beyer

Birgersson

et al. 2010

EPJ Web of Conferences

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Abstract.The nELBE beamline at Forschungszentrum Dresden-Rossendorf (FZD) provides intense neutron beams by stopping primary electrons in a liquid lead target, where neutrons are produced by bremsstrahlung photons via (γ,n) reactions. With the aim to increase the neutron yield through the enhancement of the electron beam energy (from the current 40 MeV limit up to 50 MeV), as well as to minimize several sources of background that are presently affecting the measurements, a new neutron beam-line and a new, larger neutron experimental room have been designed. The optimization of the neutron/photon ratio, the minimization of the backscattered radiation from the walls and the possibility to have better experimental conditions are the main advantages of the new design. To optimize the beamline, extensive simulations with the particle interaction and transport code FLUKA have been performed. Starting from the primary electron beam, both the photon and neutron radiation fields have been fully characterized. To have a cross-check of the results, the calculated values of the neutron yields at different energies of the primary beam have been compared both with an independent simulation with the MCNP code and with analytical calculations, obtaining a very satisfactory agreement at the level of few percent. The evaluated radiation fields have been used to optimize the direction of the new neutron beamline, in order to minimize the photon flash contribution. A general overview of the new photo-neutron source, together with all the steps of the optimization study, is here presented and discussed.

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“…[43] One useful capability associated with using pulsed photoneutron sources is the inherent generation of broad-energy, "white spectrum" neutrons and the ability to use these in time-of-flight (ToF) arrangements to carry out energydependent measurements. [44][45][46][47][48][49] Accelerators systems designed to do this must be capable of generating short pulses with widths of O(10) ns or less, and typically incorporate beam lines of roughly 5 m or greater. First, neutrons are generated across a broad energy spectrum simultaneously within a neutron production target, such as beryllium or deuterated water, during the accelerator pulse.…”

Section: Reactions With Photonsmentioning

confidence: 99%

Production and applications of neutrons using particle accelerators

Chichester

2009

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Advances in neutron science have gone hand in hand with the development and of particle accelerators from the beginning of both fields of study. Early accelerator systems were developed simply to produce neutrons, allowing scientists to study their properties and how neutrons interact in matter, but people quickly realized that more tangible uses existed too. Today the diversity of applications for industrial accelerator-based neutron sources is high and so to is the actual number of instruments in daily use is high, and they serve important roles in the fields where they're used. This chapter presents a technical introduction to the different ways particle accelerators are used to produce neutrons, an historical overview of the early development of neutron-producing particle accelerators, a description of some current industrial accelerator systems, narratives of the fields where neutron-producing particle accelerators are used today, and comments on future trends in the industrial uses of neutron producing particle accelerators.

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Development of a neutron time-of-flight source at the ELBE accelerator

Cited by 4 publications

References 1 publication

Detailed Analysis of the KAERI nTOF Facility

Detailed Analysis of the KAERI nTOF Facility

Optimization aspects of the new nELBE photo-neutron source

Production and applications of neutrons using particle accelerators

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