Mainz 2012 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 42: Instrumentation

HK 42.1: Gruppenbericht

Donnerstag, 22. März 2012, 16:30–17:00, P 3

First results of the new UCN source D at the TRIGA Mainz reactor — •Thorsten Zechlau, Werner Heil, Thorsten Lauer, Christian Plonka-Spehr, Yury Sobolev, and Norbert Trautmann — Universität Mainz, Institut für Physik

Research in fundamental physics with the free neutron is one of the key tools for testing the Standard Model at low energies. Significant improvements of the experimental performance using ultracold neutrons (UCN) require reduction of both systematic and statistical errors. The development of new UCN sources based on the superthermal concept is therefore an important step. Besides the construction of new huge UCN sources at several big research centers around the world, there exists also the idea of competitive UCN sources using pulsed reactors of the TRIGA type. To demonstrate the feasibility of a UCN source at these reactors, a superthermal UCN source based on solid deuterium was built at the tangential beamport C of the reactor TRIGA Mainz. Based on the experience obtained during three years of successfull operation, a second upgraded source was built for the radial beamport D which should increase the UCN output by at least one order of magnitude. This talk will give an overview on the first UCN storage results at "UCN D" ,obtained during source commissioning in 2011.