The LPS trigger system

Abstract

The Leading Proton Spectrometer (LPS) has been equipped with microstrip silicon detectors specially designed to trigger events with high values of x_Lvertical stroke anti p'_p vertical stroke / vertical stroke anti p_p vertical stroke #>=#0.95 where vertical stroke anti p'_p vertical stroke and vertical stroke anti p_p vertical stroke are respectively the momenta of outgoing and incoming protons. The LPS First Level Trigger can provide a clear tag for very high momentum protons in a kinematical region never explored before. In the following we discuss the physics motivation in tagging very forward protons and present a detailed description of the detector design, the front end electronics, the readout electronics, the Monte Carlo simulation and some preliminary results from 1995 data taking. (orig.)Available from TIB Hannover: RA 2999(96-045) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman