TI Group Overview

1
Collaboration LIT-KIP Status and future plans
L0
L1
L2
HLT
V. Ivanov, V. Lindenstruth
GRID

• 2002 Level-1 trigger (LHCb)
• 2003 High level trigger (ALICE)
• 2004 Tracking (CBM)
• 2004 GRID computing
• 2004 Cluster RAID
• 2005 Outlook

Volker Lindenstruth Kirchhoff Institute for
PhysicsChair of Computer Science University
Heidelberg, Germany Phone [phone]
4303 Fax [phone] Email ti_at_kip.uni-heide
lberg.de WWW www.ti.uni-hd.de
2
2002 The LHCb Level-1 Trigger Reconstruction

• 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 -gt
  PT
• Match tracks to L0 muon objects -gt PT and PID
• Select B-events using impact parameter and PT
  information
• Use T1-3 data to improve further selection (5-10
  of events)

3
2002 The LHCb Level-1 Trigger Simulation
4
2003 The ALICE High Level Trigger Simulation
HL0
HL1
HL2
5
2004 The CBM Experiment
DAQ
Analysis/Development Stages
L1/FPGA
L1/CPU
Level-1 Sub-Farm
HLT
6
2004 The CBM Event Reconstruction I
7
2004 The CBM Event Reconstruction II

• 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

KIP LIT KIP LIT LIT LIT KIP KIP KIP LIT L
IT KIP LIT
8
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.
Capetown
9
2004 Cluster RAID Architecture
User Space
Application
crlib
A
Kernel
control
f(AB)
write
cr driver
Kernel
data
A
Kernel
B
Remote Parity Disks
Hardware
Local Disk
www.ti.uni-hd.de/clusterraid
10
2005 Potential Future Plans

• CBM Global Tracking
• CBM Feature Extraction
• CBM Sub-Farm Simulation
• Cluster RAID, Fault Tolerance
• 40 TB MSS _at_ JINR, 20 TB MSS _at_ University Dubna
• GRID Computing