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ELBE Neutron Source

ELBE Neutron Source. Klaus Seidel Technische Universität Dresden. IAEA TC Meeting “Nuclear Data for IFMIF”, FZ Karlsruhe, October 4-6, 2005. Neutron laboratory of TUD with photon-neutron and D-T neutron sources. ELBE at FZ Rossendorf. E lectron L inac for beams with high

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ELBE Neutron Source

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  1. ELBE Neutron Source Klaus Seidel Technische Universität Dresden IAEA TC Meeting “Nuclear Data for IFMIF”, FZ Karlsruhe, October 4-6, 2005

  2. Neutron laboratory of TUD with photon-neutron and D-T neutron sources ELBE at FZ Rossendorf Electron Linac for beams with high Brilliance and low Emittance IAEA TC Meeting “Nuclear Data for IFMIF”, FZ Karlsruhe, October 4-6, 2005 K. Seidel, TU Dresden

  3. Deuteron beam: Ed = 300 keV, Id = 10 mA on TiT target, continuous operation with up to 1012 neutrons/s, pulsed operation (1 mA) 10 ms …100 ms with repetition rate of 1 Hz … 1 kHz. Electron beam: Ee = 40 MeV, Ie = 1mA on W target for bremsstrahlung and photo-neutron production 7·1013 neutrons/s IAEA TC Meeting “Nuclear Data for IFMIF”, FZ Karlsruhe, October 4-6, 2005 K. Seidel, TU Dresden

  4. Intension for fusion neutronics: production of high neutron fluxes with spectral distribution typical for fusion assemblies Example: flux spectrum in cells of the HCPB DEMO blanket (BBxxx, U. Fischer) Continuous part by the photo-neutron source with moderator and absorber, Ee = 30 MeV Peak of fusion neutrons by the D-T generator IFMIF: Neutron energies above 15 MeV are of particular interest for assessing the data base. IAEA TC Meeting “Nuclear Data for IFMIF”, FZ Karlsruhe, October 4-6, 2005 K. Seidel, TU Dresden

  5. Flux spectrum from the photo-neutron source at the maximum electron energy of Ee = 40 MeV MCNPX model of the source Flux spectrum at sample position per one electron With Ie = 1 mA the flux in the sample is 2.3·1011 cm-2·s-1. The fluence of neutrons with E > 15 MeV applied during tirr = 10 h amounts to 1.04·1012 cm-2. IAEA TC Meeting “Nuclear Data for IFMIF”, FZ Karlsruhe, October 4-6, 2005 K. Seidel, TU Dresden

  6. Specific activities [Bq/g] produced by Comparison with the parameters for the EFDA Task “Validation experiment of g-activities of Ta irradiated in fusion peak neutron spectrum” During tirr = 8.8 h a fluence of 7.9·1011 cm-2 was applied and all g-activities that are important up to the recycling- limit of the material were measured with a HPGe-spectrometer and analysed with the European Activation System EASY (R.A. Forrest) IAEA TC Meeting “Nuclear Data for IFMIF”, FZ Karlsruhe, October 4-6, 2005 K. Seidel, TU Dresden

  7. tested by the activity measurement Cross section data from EASY-2005 IAEA TC Meeting “Nuclear Data for IFMIF”, FZ Karlsruhe, October 4-6, 2005 K. Seidel, TU Dresden

  8. IAEA TC Meeting “Nuclear Data for IFMIF”, FZ Karlsruhe, October 4-6, 2005 K. Seidel, TU Dresden

  9. IAEA TC Meeting “Nuclear Data for IFMIF”, FZ Karlsruhe, October 4-6, 2005 K. Seidel, TU Dresden

  10. IAEA TC Meeting “Nuclear Data for IFMIF”, FZ Karlsruhe, October 4-6, 2005 K. Seidel, TU Dresden

  11. IAEA TC Meeting “Nuclear Data for IFMIF”, FZ Karlsruhe, October 4-6, 2005 K. Seidel, TU Dresden

  12. IAEA TC Meeting “Nuclear Data for IFMIF”, FZ Karlsruhe, October 4-6, 2005 K. Seidel, TU Dresden

  13. IAEA TC Meeting “Nuclear Data for IFMIF”, FZ Karlsruhe, October 4-6, 2005 K. Seidel, TU Dresden

  14. IAEA TC Meeting “Nuclear Data for IFMIF”, FZ Karlsruhe, October 4-6, 2005 K. Seidel, TU Dresden

  15. IAEA TC Meeting “Nuclear Data for IFMIF”, FZ Karlsruhe, October 4-6, 2005 K. Seidel, TU Dresden

  16. Conclusions At the ELBE laboratory a photo-neutron source is under construction that will produce 7.1·1013 neutrons/sec with energies ranging up to 30 MeV. For the neutron energy range 15 MeV < E < 30 MeV fluences of 1012 neutrons/cm2 can be applied in samples arranged close to the source. Ta was used - as an example of a typical heavy nucleus - to investigate the nuclear reactions that can be induced by these neutrons. With HPGe-spectroscopy the g-activities produced by the reactions (n,4n), (n,p), (n,d), (n,n’p), (n,a), (n,n’a), (n,2na), as well as (n,2n), (n,g), can be measured, and the cross-section integrals obtained in this way, could be used for validating the evaluated data of the reactions in libraries. IAEA TC Meeting “Nuclear Data for IFMIF”, FZ Karlsruhe, October 4-6, 2005 K. Seidel, TU Dresden

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