Title :
Trigger circuits for the PHENIX electromagnetic calorimeter
Author :
Frank, S.S. ; Britton, C.L., Jr. ; Wintenberg, A.L. ; Young, G.R.
Author_Institution :
Oak Ridge Nat. Lab., TN, USA
Abstract :
Monolithic and discrete circuits have been developed to provide trigger signals for the PHENIX electromagnetic calorimeter detector. These trigger circuits are deadtimeless and create overlapping 4 by 4 energy sums, a cosmic muon trigger, and a 144 channel energy sum. The front end electronics of the PHENIX system sample the energy and timing channels at each bunch crossing (BC) but it is not known immediately if this data is of interest. The information from the trigger circuits is used to determine if the data collected is of interest and should be digitized and stored or discarded. This paper presents details of the design, issues affecting circuit performance, characterization of prototypes fabricated in 1.2 μm Orbit CMOS, and integration of the circuits into the EMCal electronics system
Keywords :
CMOS integrated circuits; calorimeters; detector circuits; nuclear electronics; trigger circuits; 1.2 μm Orbit CMOS; 144 channel energy sum; EMCal electronics system; PHENIX electromagnetic calorimeter; bunch crossing; circuit performance; cosmic muon trigger; deadtimeless; discrete circuits; energy sums; front end electronics; monolithic circuits; overlapping; prototypes; timing channels; trigger circuits; trigger signals; Application specific integrated circuits; Detectors; Glass; Laboratories; Lead; Mesons; Poles and towers; Printed circuits; Timing; Trigger circuits;
Conference_Titel :
Nuclear Science Symposium, 1997. IEEE
Print_ISBN :
0-7803-4258-5
DOI :
10.1109/NSSMIC.1997.672672
