Nucl.Instrum.Meth. A450 (2000) 235-252 A Forward Plug Calorimeter (FPC) for the ZEUS detector at HERA has been built
as a shashlik lead-scintillator calorimeter with wave length shifter fiber
...readout. Before installation it was tested and calibrated using the X5 test
beam facility of the SPS accelerator at CERN. Electron, muon and pion beams in
the momentum range of 10 to 100 GeV/c were used. Results of these measurements
are presented as well as a calibration monitoring system based on a $^{60}$Co
source.
The ZEUS first and second level trigger Boterenbrood, H.; O'Dell, V.; Uijterwaal, H.A.J.R. ...
IEEE Conference on Nuclear Science Symposium and Medical Imaging,
1992
Conference Proceeding
The ZEUS trigger has a three-level structure. At the first level, data are processed in a pipelined manner, while the readout data are kept in analog or digital pipelines. At the second-level, arrays ...of microprocessors analyze the digitized data to reduce the trigger rate by a factor of 10 from 1 kHz to 100 Hz. After the event has been assembled by the event builder, it is analyzed by a processor station, part of a farm of 36 stations, providing an event reduction of by factor of 10-20. The maximum rate of events (a mixture of background, almost real photoproduction, and deep-inelastic scattering events) that can be written to tape at the DESY-IBM after the selection in the three-level trigger system is 5-10 Hz at an average event size of about 100 Kbyte.< >
A Forward Plug Calorimeter (FPC) for the ZEUS detector at HERA has been built as a shashlik lead-scintillator calorimeter with wave length shifter fiber readout. Before installation it was tested and ...calibrated using the X5 test beam facility of the SPS accelerator at CERN. Electron, muon and pion beams in the momentum range of 10 to 100 GeV/c were used. Results of these measurements are presented as well as a calibration monitoring system based on a \(^{60}\)Co source.
