Berlin 2005 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 6: Kern- und Teilchen-Astrophysik

HK 6.7: Vortrag

Freitag, 4. März 2005, 15:45–16:00, TU MA144

Loss and Depolarization Studies of Ultra-cold Neutrons — •Peter Fierlinger¹, I. Altarev², T. Brys¹, M. Daum¹, M. Gupta¹, R. Henneck¹, S. Heule¹, M. Gupta¹, M. Kasprzak¹, K. Kirch¹, M. Lasakov³, M. Makela⁴, A. Pichlmaier¹, U. Straumann⁵ und A. Young⁶ — ¹Paul Scherrer Institut, Villigen-PSI, Switzerland — ²Technische Universität München — ³Petersburg Nuclear Physics Institut — ⁴Virginia Institute of Technology — ⁵Universität Zürich — ⁶North Carolina State University

Storage and depolarization of ultra-cold neutrons (UCN), although important for numerous experiments in fundamental and particle physics, is still not fully understood. We have carried out an experiment based on a cylindrical storage vessel with a magnetic shutter on the bottom, gravity and material walls. The loss and depolarization probability per wall interaction of the stored UCN was measured as a function of energy and temperature. We tested diamond-like carbon (DLC) coatings on Aluminum and quartz as wall materials and compared them to Beryllium. We also made a storage container using DLC coatings on plastic and Aluminum foil. We found the DLC loss parameters to be comparable to Beryllium.