Mr
Ralf Spiwoks
(CERN)
13/09/2005, 11:00
Triggering
Oral
The ATLAS Level-1 Central Trigger Processor (CTP) combines information
from calorimeter and muon trigger processors and makes the final Level-1
Accept (L1A) decision on the basis of lists of selection criteria (trigger
menus). In addition to the event-selection decision, the CTP also provides
trigger summary information to the data acquisition system and the Level-2
trigger. It further...
Joannes HALLER
(CERN),
Ralf Spiwoks
(CERN)
13/09/2005, 11:25
Oral
The ATLAS detector at CERN's LHC will be exposed to proton-proton
collisions at a rate of 40 MHz. In order to reduce the data rate,
only potentially interesting events are selected by a three-level
trigger system. Its first level is implemented in electronics and
firmware, and aims at reducing the data output rate to about 75
kHz. The second and third trigger levels are based on...
Mr
Thilo Pauly
(European Organization for Nuclear Research (CERN))
13/09/2005, 11:50
Triggering
Oral
The ATLAS detector at CERN's LHC will be exposed to proton-proton
collisions at a bunch-crossing rate of 40 MHz. In order to reduce the
data rate, a three-level trigger system selects potentially
interesting events. Its first level is implemented in electronics and
firmware, and aims at reducing the output rate to under 100 kHz. The
Central Trigger Processor (CTP) combines...
Mr
Hannes Sakulin
(Institute for High Energy Physics, Vienna, and CERN)
13/09/2005, 12:15
Oral
In CMS, three independent first-level muon trigger systems identify muon candidate
tracks. The Global Muon Trigger (GMT) receives up to 16 candidate tracks and combines
them using algorithms exploiting the complementarity of the muon systems. The GMT
also correlates the muon candidate tracks with calorimeter regions in order to
determine muon isolation or confirmation by the calorimeter....
Dr
Orlando Villalobos Baillie
(University of Birmingham)
13/09/2005, 12:40
Oral
The Alice Central Trigger Processor is described. The current trigger concept was
introduced in 2001 and allows up to 50 trigger inputs at three different levels:
level 0 (24 inputs, 1.2 μs latency); level 1 (20 inputs, 6.5 μs latency); level 2
(6 inputs, 88 μs latency). Up to 50 trigger classes (where inputs and destination
detectors are specified) can be used simultaneously. Detailed...
