Abstract
In the experiment NA11 at the CERN SPS the MC68000 based FAMP system has been succesfully implemented in a second stage trigger. It was used in a study of inclusive φ-meson production to select φ→K +K − decays by determining the charged K-meson trajectories and calculating the K + K − invariant mass. A trigger rate reduction by a factor of 25 and an increase in the number of recorded φ-decays per unit time by a factor of 8 has been achieved.
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