Transcript TI Group Overview

Collaboration
LIT-KIP
Status and future plans
V. Ivanov, V. Lindenstruth
• 2002: Level-1 trigger (LHCb)
• 2003: High level trigger (ALICE)
• 2004: Tracking (CBM)
• 2004: GRID computing
• 2004: Cluster RAID
• 2005: Outlook
Volker Lindenstruth (www.ti.uni-hd.de) 17-Jul-15
Volker Lindenstruth
Kirchhoff Institute for Physics
Chair of Computer Science
University Heidelberg, Germany
Phone: +49 6221 54 4303
Fax:
+49 6221 54 4345
Email:
[email protected]
WWW: www.ti.uni-hd.de
 Events
2002: The LHCb Level-1 Trigger – Reconstruction
CPU (CA)
5 ms
 time (ms)
2d tracks in a
45o
Z vtx histogram
•
•
•
•
•
•
sector:
56mm
dzpv
X,Y vtx
Find VELO 2D tracks (~70) and reconstruct 3D primary vertex
Reconstruct high-impact parameter tracks (~10%) in 3D
Extrapolate to TT through small magnetic field -> PT
Match tracks to L0 muon objects -> PT and PID
Select B-events using impact parameter and PT information
Use T1-3 data to improve further selection (5-10% of events)
Volker Lindenstruth (www.ti.uni-hd.de) 17-Jul-15
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2002: The LHCb Level-1 Trigger – Simulation
Volker Lindenstruth (www.ti.uni-hd.de) 17-Jul-15
3
2003: The ALICE High Level Trigger – Simulation
HL0
HL1
HL2
Volker Lindenstruth (www.ti.uni-hd.de) 17-Jul-15
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2004: The CBM Experiment
DAQ
Analysis/Development
Stages
L1/FPGA
L1/CPU
Level-1 Sub-Farm
HLT
Volker Lindenstruth (www.ti.uni-hd.de) 17-Jul-15
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2004: The CBM Event Reconstruction – I
STS Data
RICH Data
TRD Data
Track Finder
Ring Finder
Track Finder
Track Fit
Track Fit
PV Finder
Track Merger
PV GeoFit
Track Fit
SV GeoFit
SV ConstrFit
Performance
Select/Discard Event
Volker Lindenstruth (www.ti.uni-hd.de) 17-Jul-15
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2004: The CBM Event Reconstruction – II
KIP
LIT
KIP
LIT
LIT
LIT
KIP
KIP
KIP
LIT
LIT
KIP
LIT
• Track finding
•Hough transform
•Cellular automaton
•Conformal mapping
•3D track following
• Track fitting
•Kalman filter
•Kalman filter (projections)
•Parabolic approximation
•Polynomial approximation
•Orthogonal polynomial set
• Primary vertex fitting
•Minimization of impact parameters
•Geometrical Kalman filter
• Secondary vertex fitting
•Geometrical Kalman filter
•Mass and topological constrained fit
• RICH ring finding
•Track extrapolation
•Hough transform
•Elastic net
•Robust fitter
Volker Lindenstruth (www.ti.uni-hd.de) 17-Jul-15
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2004: Online GRID
Tromsø
Bergen
Dubna
Heidelberg
Successful deployment of
„on-line GRID“ in Nov. 2004,
where detector data was
processed in real-time
on-line.
Volker Lindenstruth (www.ti.uni-hd.de) 17-Jul-15
Capetown
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2004: Cluster RAID Architecture
User Space
Application crlib
data
Kernel
control
Kernel
A
cr driver
read
Kernel
A
krecoveryd
Remote
Parity Disks
kcrsyncd
Local Disk
B
kcrd
Hardware
f(A^B)
write
enc
cr_main
dec
cr_rs
www.ti.uni-hd.de/clusterraid
Volker Lindenstruth (www.ti.uni-hd.de) 17-Jul-15
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2005 – … : Potential Future Plans
• CBM Global Tracking
• CBM Feature Extraction
• CBM Sub-Farm Simulation
• Cluster RAID, Fault Tolerance
• 40 TB MSS @ JINR, 20 TB MSS @ University Dubna
• GRID Computing
•…
Volker Lindenstruth (www.ti.uni-hd.de) 17-Jul-15
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