Neutrons at ELBE
Fast neutron facilities have traditionally been of two types; white sources and quasi-monoenergetic ones. While the latter deliver high-intensity 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 is 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 nELBEhas been built. The electrons can be used to produce neutrons in a liquid-lead neutron radiator, and the neutron energies that can be measured range from 100 keV up to 10 MeV with an electron beam repetition rate of 0.2 MHz. In this energy interval, there is a need for neutron cross section measurements relevant for basic science and technical applications. The long-term needs for nuclear data have been formulated, e.g., by the International Atomic Energy Agency .
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.
The photoneutron source nELBE is part of a BMBF joint research project (see TRAKULA website)
Transnational access to the nELBE facility is possible through the FP7-Project CHANDA
 Long Term Needs for Nuclear Data Development (INDC(NDS)-428) comp. M. Herman 2001 (Vienna: International Atomic Energy Agency Nuclear Data section)