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HK: Fachverband Hadronen und Kerne
HK 62: Accelerators and Instrumentation I
HK 62.1: Group Report
Wednesday, March 18, 2009, 16:30–17:00, H-ZO 80
Installation and commissioning of the Kaos spectrometer at MAMI — •Patrick Achenbach — Institut für Kernphysik, Joh. Gutenberg-Universität, Mainz
At the Institut für Kernphysik in Mainz, Germany, the microtron MAMI has been upgraded to 1.5 GeV electron beam energy and can now be used to study strange hadronic systems. In recent years the compact magnetic spectrometer Kaos was installed in the existing spectrometer facility operated by the A1 collaboration. Kaos is especially suitable for the detection of kaons. Since September 2008 measurements of kaon production on hydrogen have been successfully performed. The identification of Λ and Σ0 hyperons in the missing mass has demonstrated the capability of the extended facility to perform strangeness electro-production spectroscopy. Kaons in the angular range of 21-43∘ and momentum range of 400-600 MeV/c were detected with a survival probability of around 10% and identified by their time-of-flight. In 2009, the Kaos spectrometer will cover simultaneously electron scattering angles close to 0∘ and kaon scattering angles around 5∘ up to 15∘ in order to extract dynamical information from the K+ angular distribution.