CHEP 2003, La Jolla, 23-28 March 2003 1 A. Polini ZEUS MVD and GTT Group: ANL, Bonn Univ., DESY-Hamburg -Zeuthen, Hamburg Univ., KEK-Japan, NIKHEF, Oxford Univ., Bologna, Firenze, Padova, Torino Univ. and INFN, UCL, Yale, York. The Architecture of the ZEUS Micro The Architecture of the ZEUS Micro Vertex Detector DAQ and Second Vertex Detector DAQ and Second Level Global Track Trigger Level Global Track Trigger Alessandro Polini DESY/Bonn
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ZEUS MVD and GTT Group: ANL, Bonn Univ., DESY-Hamburg -Zeuthen, Hamburg Univ., KEK- Japan, NIKHEF, Oxford Univ., Bologna, Firenze, Padova, Torino Univ.
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CHEP 2003, La Jolla, 23-28 March 2003 1 A. Polini
ZEUS MVD and GTT Group: ANL, Bonn Univ., DESY-Hamburg -Zeuthen, Hamburg Univ., KEK-Japan, NIKHEF, Oxford Univ., Bologna, Firenze, Padova, Torino Univ. and INFN, UCL, Yale, York.
The Architecture of the ZEUS Micro The Architecture of the ZEUS Micro Vertex Detector DAQ and Second Vertex Detector DAQ and Second
Level Global Track TriggerLevel Global Track Trigger
Alessandro Polini DESY/Bonn
CHEP 2003, La Jolla, 23-28 March 2003 A. Polini2
OutlineOutline
The ZEUS Silicon Micro Vertex DetectorThe ZEUS Silicon Micro Vertex Detector ZEUS Experiment Environment and RequirementsZEUS Experiment Environment and Requirements DAQ and Control DescriptionDAQ and Control Description The Global Track TriggerThe Global Track Trigger Performance and first experience with real dataPerformance and first experience with real data Summary and OutlookSummary and Outlook
CHEP 2003, La Jolla, 23-28 March 2003 A. Polini3
Detector LayoutDetector LayoutForward Section
410 mm
The forward section consists of 4 wheels with 28 wedged silicon sensors/layer providing r- information.
Barrel Section622 mm
The Barrel section provides 3 layers of support frames (ladders) which hold 5 full modules, 600 square sensors in total, providing r- and r-z space points.
e±
27.5 GeV
p
920 GeV
CHEP 2003, La Jolla, 23-28 March 2003 A. Polini4
The ZEUS DetectorThe ZEUS Detector
bunch crossing interval: 96 ns
ZEUS: 3-Level Trigger System(Rate 500Hz405 Hz)
e±
27.5 GeV
p
920 GeV
Event BuilderEvent Builder
Third Level TriggerThird Level Trigger
cpucpucpucpu cpucpu cpucpu cpucpu cpucpu
CALCAL CTDCTD
Offline TapeOffline Tape
Global Second Global Second Level TriggerLevel Trigger
GSLT Accept/RejectGSLT Accept/Reject
Global First Global First Level TriggerLevel Trigger
GSLT Accept/RejectGSLT Accept/Reject
CTDCTDFront EndFront End
CALCALFront EndFront End
Other Other ComponentsComponents
Other Other ComponentsComponents
CTDCTDSLTSLT
CALCALSLTSLT
CALCALFLTFLT
CTDCTDFLTFLT
~10 ms
5Hz5Hz
40Hz40Hz
500Hz500Hz
101077 Hz Hz
Eve
nt
Bu
ffer
s
Eve
nt
Bu
ffer
s
55 s
pip
elin
es
pip
elin
e
55 s
pip
elin
es
pip
elin
e
~0.7 s
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MVD DAQ and Trigger DesignMVD DAQ and Trigger Design
ZEUS experiment designed by end of ’80s– First high rate (96 ns) pipelined system
– With a flexible 3 level trigger
– Main building blocks were transputers (20Mbit/s)
10 years later the MVD: – 208.000 analog channels
– MVD available for triggering from 2nd level trigger on
DAQ Design Choice:– Use off-the-shelf products whenever possible
Custom implementation based on the ZEUS LPS detector supplies (INFN TO)
– Cooling and Temperature monitor:
Custom NIKHEF SPICan Box ***
– Interlock System:
Frenzel+Berg EASY-30 CAN/SPS ****
MVD slow control operation:– Channel monitoring performed typically every 30s
– CAN emergency messages are implimented
– SC wrong state disables the experiments trigger
– CERN Root based tools are used when operator control and monitoring is required*http://www.esd.electronic **http://www.iseg-hv.com ***http://www.nikhef.nl/user/n48/zeus_doc.html
****//www.frenzel-berg.de/produkte/easy.html
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Summary and OutlookSummary and Outlook
The MVD and GTT system have been successfully integrated into the ZEUS experiment
267 runs with 3.1Mio events recorded between 31/10/02 and 18/02/03 with MVD on and DQM (~ 700 nb-1)
The MVD DAQ and GTT architecture, built as a synthesis of custom solutions and common-off-the-shelf equipment (real Time OS + Linux PC+ Gigabit Network), works reliably
The MVD DAQ and GTT performance (latency, throughput and stability) are satisfactory
Next steps: Enable utilization of barrel algorithm result at the GSLT Finalize development and integration of the forward algorithm
So far very encouraging results. Looking forward to routine high
luminosity data taking. The shutdown ends in June 2003...