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[en] Using the E791 spectrometer we have tested a multiplicity jump trigger that makes use of thin quartz plates to count the number of particles before and after a decay region just downstream of a thin tungsten target struck by a 500 GeV pion beam. The detector is sensitive to about 2.7 tracks being created between the plates at the 1 sigma level. This performance level may enhance charm events by a small amount, and should lead to an enrichment of well over 100 for B anti B events. (orig.)
Journal
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment; ISSN 0168-9002; 
; CODEN NIMAER; v. 333(2-3); p. 324-329
; CODEN NIMAER; v. 333(2-3); p. 324-329