Mainz 2012 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 27: Instrumentation
HK 27.4: Vortrag
Mittwoch, 21. März 2012, 15:00–15:15, P 3
Production and behavior studies of the new ammonia target for the COMPASS experiment — •Alexander Berlin1, Sonja Kunkel1, Stefan Runkel2, Jonas Herick1, Christian Hess1, Werner Meyer1, and Gerhard Reicherz1 — 1Lehrstuhl für Hadronen und Kerne, Ruhr-Universität Bochum — 2Physikalisches Institut, Universität Bonn
In 2011 the COMPASS experiment at CERN ran with a fresh ammonia target, which was produced by a collaboration between the ’Polarized Target’-groups of Bonn and Bochum.
This new material was mentioned to replace the 16 years old ammonia, which was used in the foregoing experiment, the SMC.
A reduced maximum polarisation and longer build-up times were observed in previous runs compared to the run in 1996. So the decision was made to produce fresh target material.
In this talk, the production routine of the target material as well as a comparison to the 16 years old material will be shown. First results from the COMPASS target in 2011 will be presented afterwards.