Contact

Dr. Arnd Junghans
Project leader
Nuclear Physics
a.junghansAthzdr.de
Phone: +49 351 260 - 3589
Fax: +49 351 260 - 13589

Neutrons at ELBE

Fast neutron facilities are generally of two types:

white neutron sources and quasi-monoenergetic neutron sources

While the latter deliver neutron beams at a single energy, the white sources produce neutrons in a continuous range of energies when a beam of charged particles hits a heavy target like tungsten or lead. In this case, the energy of a neutron can be determined by measuring its velocity by flight time.

In the new Center for High-Power Radiation Sources of HZDR situated at the superconducting electron linear accelerator ELBE, the very compact neutron time-of-flight system nELBE has been built. The electrons can be used to produce neutrons in a liquid-lead neutron radiator. The spectrum extends from 100 keV up to about 10 MeV with a variable electron beam repetition rate from single pulse operation to 400 kHz c.w. The micro bunch charge is adjustable up to 77 pC. The flight path range is about 5 – 10 m.

Floorplan nELBE 2017
Floorplan nELBE 2017 Floorplan of the new nELBE time-of-flight facility with photoneutron source on the bottom and low-background experimental hall (top). The insets show details of the photoneutron production in a liquid lead circuit, the neutron beam collimator and an experimental setup with gamma-ray detectors for inelastic scattering.
Foto: Roland Beyer
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In the fast neutron energy range, there is a need for neutron-induced reaction data relevant for basic science and technical applications. The long-term needs for nuclear data are updated  every ten years by international experts at the International Atomic Energy Agency [1].

nELBE beam parameters table
nELBE beam parameters table:
Characteristic parameters of the nELBE facility for time-of-flight experiments
Foto: Roland Beyer
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In addition, the TU Dreden DT neutron generator that produces monoenergetic neutrons at 14 MeV is located in the ELBE accelerator hall. This facility is used for fusion neutronics studies and neutron activation experiments related to fundamental physics, e.g. the search for the neutrinoless double-beta decay.

[1] Long Term Needs for Nuclear Data Development (INDC(NDS)-0601) ed. A. Plompen 2011
(Vienna: International Atomic Energy Agency Nuclear Data section)
presentations:

Neutron spectral rate

Experimental setups

Transnational Access

Transnational access to the nELBE facility is possible through the FP7-Project CHANDA

Publications

Backward-forward reaction asymmetry of neutron elastic scattering on deuterium
Pirovano, E.; Beyer, R.; Junghans, A. R.; Nankov, N.; Nolte, R.; Nyman, M.; Plompen, A. J. M.

Physical Review C 95(2017), 024601

Angular Distribution Measurement of Gamma Rays from Inelastic Neutron Scattering on Fe-56 at the nELBE Time-of-Flight Facility
Dietz, Mirco; Bemmerer, D.; Beyer, R.; Gohl, S.; Junghans, A. R.; Kögler, T.; Massarczyk, R.; Müller, S. E.; Schwengner, R.; Szücs, T.; Takacs, M. P.; Wagner, A.; Wagner, L.

International Conference on Nuclear Data for Science and Technology, 11.-16.09.16, Bruges, Belgium

EPJ Web of Conferences in press

Neutron Transmission Measurement for Natural W at nELBE
Song, T.-Y.; Kim, J. W.; Kim, H. I.; Yang, S.-C.; Lee, C. W.; Lee, Y.-O.; Junghans, A. R.; Beyer, R.; Kögler, T.; Schwengner, R.; Hannaske, R.; Wagner, L.; Leinhardt, T. P.; Takacs, M. P.; Massarczyk, R.; Müller, S.; Ferrari, A.; Schmidt, K.; Röder, M.; Bemmerer, D.; Szücs, T.; Wagner, A.

International Conference on Nuclear Data for Science and Technology, 11.-16.09.16, Bruges, Belgium
EPJ Web of Conferences in press

Inelastic scattering of fast neutrons from 56Fe
Beyer, R.; Birgersson, E.; Dietz, M.; Hannaske, R.; Junghans, A. R.; Kögler, T.; Massarczyk, R.; Matic, A.; Schwengner, R.; Wagner, A.

International Conference on Nuclear Data for Science and Technology - ND2016, 11.-16.09.2016, Bruges, Belgium

EPJ Web of Conferences in press

Fast neutron-induced fission at the time-of-flight facility nELBE
Toni Kögler, Roland Beyer  , Mirco Dietz, Arnd R. Junghans, Christian Lorenz, Stefan E. Müller, Tobias P. Reinhardt , Konrad Schmidt, Ronald Schwengner, Marcell P. Takacs, and Andreas Wagner

ND2016 - International Conference on NUCLEAR DATA FOR SCIENCE AND TECHNOLOGY, 11.-16.09.2016, Bruges, Belgien

EPJ Web of Conferences in press

Fast-neutron Induced Reactions at the nELBE Time-of-flight Facility
Junghans, A. R.; Beyer, R.; Elekes, Z.; Grosse, E.; Hannaske, R.; Koegler, T.; Massarczyk, R.; Schwengner, R.; Wagner, A.

Nuclear Data Sheets 119(2014), 349-352

Quantitative molecular plating of large-area 242Pu Targets with improved layer properties
Vascon, A.; Runke, J.; Trautmann, N.; Cremer, B.; Eberhardt, K.; Düllmann, Ch. E.

Applied Radiation and Isotopes 95(2015), 36-43

Determination of Resonance Parameters and their Covariances from Neutron Induced Reaction Cross Section Data
Schillebeeckx, P.; Becker, B.; Danon, Y.; Guber, K.; Harada, H.; Heyse, J.; Junghans, A. R.; Kopecky, S.; Massimi, C.; Moxon, M. C.; Otuka, N.; Sirakov, I.; Volev, K.

Nuclear Data Sheets 113(2012), 3054-3100

Characterization of the neutron beam at nELBE
Beyer, R.; Birgersson, E.; Elekes, Z.; Ferrari, A.; Grosse, E.; Hannaske, R.; Junghans, A. R.; Kögler, T.; Massarczyk, R.; Matic, A.; Nolte, R.; Schwengner, R.; Wagner, A.

Nuclear Instruments and Methods in Physics Research A 723(2013), 151-162

Neutron total cross section measurements of gold and tantalum at the nELBE photoneutron source
Hannaske, R.; Elekes, Z.; Beyer, R.; Junghans, A.; Bemmerer, D.; Birgersson, E.; Ferrari, A.; Grosse, E.; Kempe, M.; Kögler, T.; Marta, M.; Massarczyk, R.; Matic, A.; Schramm, G.; Schwengner, R.; Wagner, A.

European Physical Journal A 49(2013), 137


Contact

Dr. Arnd Junghans
Project leader
Nuclear Physics
a.junghansAthzdr.de
Phone: +49 351 260 - 3589
Fax: +49 351 260 - 13589