Gem Scifi MicroMeGas SciFi SDC Silicons Target MWPC Straws MWPC GEM SciFi GEM SciFi RICH Filter 2 Hadron Hadron Inner Trigger Trigger Inner Ladder Trigger Middle Trigger MWPC Trigger Ladder MiddleTrigger Trigger Outer SDC SciFi Outer Trigger Veto Trigger


COMPASS is a new fixed target experiment presently in operation at CERN. It has the goal to investigate hadron structure and hadron spectroscopy by using either muon or hadron beams. From measurements of various hadron asymmetries in polarized muon-nucleon scattering it will be possible to determine the contribution of the gluons to the nucleon spin. Main… (More)

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