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<font color="#000099"><b><font color="#3333ff">Physics Seminar<br>
Wednesday, January 6, 2010<br>
11:00AM<br>
CEBAF Center AUD.<br>
Cookies & Coffee at 10:45AM<br>
<br>
</font></b></font><b><font color="#000099"><font color="#cc0000">Matthew
Stettler
<br>
Los Alamos National Lab
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"Large Signal Processing Systems in High Energy Physics:
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The LHC Compact Muon Solenoid Trigger System and Related Efforts"</font>
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The Compact Muon Solenoid is a large particle detector on the Large
Hadron Collider at CERN (LHC), which has begun operations recently
following a year long startup delay. This detector produces data at
nearly terabit rates, and requires a large signal processing system to
filter the data stream for significant physics events. The core of
this processing system, known as the Global Calorimeter Trigger (GCT),
has been designed in collaboration with ISR and LANSCE divisions at
LANL. The design of the GCT will be presented, with short background
on the algorithms, but primary emphasis will be on the hardware
technologies involved. The device is required to have a sustained
processing rate of 340Gbps, and maintain a 10 uS latency for event
detection and identification. It is comprised of 54 input serializers,
8 processing modules, and 3 large sorting/carrier modules, making it
unusually large for a signal processor by LANL standards. Initial
integration and operation has been quite successful, so the opportunity
was taken to develop a more advanced architecture that will scale to
the performance required for Super LHC data rates. This design, also
done in collaboration with ISR and LANSCE, has been completed and
elements are currently under test at CERN. The hardware architecture of
this latest effort will also be presented.<br>
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