A New High Energy Photon Tagger for the H1-Detector at HERA
نویسنده
چکیده
The H1 detector at HERA has been upgraded by the addition of a new electromagnetic calorimeter. This is installed in the HERA tunnel close to the electron beam line at a position ≃ 8m from the interaction point in the electron beam direction. The new calorimeter extends the acceptance for tagged photoproduction events to the high y range, 0.85 < y < 0.95, and thus significantly improves the capability of H1 to study high energy γ-p processes. The calorimeter design, performance and first results obtained during the 1996-1999 HERA running are described. —————————————————— a Lebedev Physical Institute, Moscow, Russia b Deparment of Physics, University of Liverpool, Liverpool, UK c DESY, Hamburg, Germany
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