Gießen 2007 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 43: Instrumentation und Anwendungen
HK 43.3: Vortrag
Donnerstag, 15. März 2007, 11:45–12:00, F
Preliminary results on the performance of the new test setup with solid deuterium converter for ultracold neutrons production at the reactor TRIGA in Mainz — •Yury Sobolev1, Igor Altarev2, Klaus Eberhardt3, Erwin Gutsmiedl2, Andreas Frei2, Gabriele Hampel3, Frank Joachim Hartmann2, Werner Heil1, Jens Volker Kratz3, Torsten Lauer1, Stephan Paul2, Yury Pokotilovskii4, and Norbert Wiehl3 — 1Institut für Physik, Universität Mainz, Germany — 2Physik Department E18, TU München, Germany — 3Institut für Kernchemie, Universität Mainz, Germany — 4JINR, Dubna, Russia
Recently, a prototype of ultra cold neutron (UCN) source with a solid D2-converter has been taken into operation at the tangential channel C at the reactor TRIGA in Mainz. With solid mesitylene as pre-moderator and 8.64 mol of solid D2 up to 2× 105 ultra- and very- cold neutrons per reactor pulse (9 MJ) were counted. To characterize the source performance, the UCN output has been studied by varying the thickness of the solid D2 converter and by analysing the time-of-flight spectra using foils of selected materials with different Fermi potential in front of the detector. Results of these measurements and the MC simulation of the setup are discussed. Based on our experiences, an upgraded UCN source is presented which will be in operation from 2008 on at the radial channel D with its factor of 6 higher neutron flux.