TY - JOUR
T1 - A two level fastbus based trigger system for CDF
AU - Amidei, D.
AU - Campbell, M.
AU - Frisch, H.
AU - Grosso-Pilcher, C.
AU - Hauser, J.
AU - Liss, T.
AU - Redlinger, G.
AU - Roodman, A.
AU - Sanders, H.
AU - Shochet, M.
AU - Ting, J.
AU - Tsai, Y. D.
AU - Dell'Orso, M.
AU - Giannetti, P.
AU - Ristori, L.
N1 - Funding Information:
This work was supportedb y the National Science Foundation.
PY - 1988/6/1
Y1 - 1988/6/1
N2 - We describe a two level FASTBUS based trigger processor designed and built for the CDF detector at the Fermilab pp collider. The Level 1 decision is based on the global energy deposition in the calorimeters as well as on the presence of muon candidates and stiff tracks in the central drift chamber. The Level 1 decision is made in the 3.5 μs between beam crossings, incurring no deadtime while reducing a raw event rate of 50-75 kHz to a few kHz. The remaining events are passed on to Level 2. The Level 2 decision is driven by the topology of the event, operating on calorimeter clusters, central stiff tracks and muon candidates. Level 2 is designed to reduce the rate to 1-100 Hz, incurring less than 10% deadtime, before initiating readout of all the detector elements. A large fraction of the trigger hardware is used for both the Level 1 and Level 2 decisions.
AB - We describe a two level FASTBUS based trigger processor designed and built for the CDF detector at the Fermilab pp collider. The Level 1 decision is based on the global energy deposition in the calorimeters as well as on the presence of muon candidates and stiff tracks in the central drift chamber. The Level 1 decision is made in the 3.5 μs between beam crossings, incurring no deadtime while reducing a raw event rate of 50-75 kHz to a few kHz. The remaining events are passed on to Level 2. The Level 2 decision is driven by the topology of the event, operating on calorimeter clusters, central stiff tracks and muon candidates. Level 2 is designed to reduce the rate to 1-100 Hz, incurring less than 10% deadtime, before initiating readout of all the detector elements. A large fraction of the trigger hardware is used for both the Level 1 and Level 2 decisions.
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U2 - 10.1016/0168-9002(88)90861-3
DO - 10.1016/0168-9002(88)90861-3
M3 - Article
AN - SCOPUS:0024034513
SN - 0168-9002
VL - 269
SP - 51
EP - 62
JO - Nuclear Inst. and Methods in Physics Research, A
JF - Nuclear Inst. and Methods in Physics Research, A
IS - 1
ER -