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HK: Physik der Hadronen und Kerne

HK 39: Instrumentation und Anwendungen V

HK 39.9: Talk

Thursday, March 20, 2003, 15:45–16:00, C

Status of the ENSTAR Detector — •Bidyut Roy and Hartmut Machner — IKP, FZ Juelich

The large acceptance plastic scintillator detector ENSTAR which has been designed and built at BARC, Bombay for the studies of eta- nucleus bound state (the so called eta-mesic nucleus) has been transported to COSY, Juelich where the final fabrication work and a test measurement in assembled condition are in progress. A few scintillator pieces of this detector have been tested in-beam at COSY in the summer 2002. The detector was mounted in ΔE-E configuration at the exit of the standard focal plane of Big Karl spectrometer. Proton beam of 1.54 GeV/c were bombarded on Cromium-Alumina target and Big Karl was set for different momenta (p/q) values to select protons and pions of energy range that has large overlap with the energy range of present interest. A good separation of pion, proton, deuteron etc. has been achieved. The particle identification was confirmed from the time of flight information in the focal plane. The results will be presented.