Download Prototype of data storage system using ROOT IO

ROOT-based framework for the
reconstruction of emulsions data
Valeri Tioukov, INFN, Napoli
Set of tools for storage, interactive reconstruction and
analysis of emulsions data is combined into a kind of
framework
Valeri Tioukov GS May-2003
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Motivation
• For the analysis of “non-standard” emulsion
data coming from various scanning system,
interactive, flexible, upgradeable tool is
required
• For learning of new effects and testing new
reconstruction algorithms
Valeri Tioukov GS May-2003
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Realization
• Set of C++ classes and routines combined
into a few shared libs
• Intensive use of ROOT tools and structuries
• libEdr.sh - reconstruction & simulation
• libEdb.sh - storage
• libEmath.sh – general algorithms
Valeri Tioukov GS May-2003
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Reconstruction
• Currently start from the microtracks level
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Microtrack -> basetrack linking (up-down)
Patterns (plates) alignment
Tracks recognition
…
• Grains analysis part may be included
Valeri Tioukov GS May-2003
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Reconstruction (2)
• Core part is input data format independent:
I.e. data-taking independent
Out.root
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ASCII
ROOT
IO.C
ORACLE
Objy
….
Steering script(s)
libEdr.sh
Valeri Tioukov GS May-2003
Output
trees
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Storage part
• For batch processing of large amount of
data
• For monitoring&analysis of raw data
quality and special effects
• To have system-independent compact
format for data sharing
Valeri Tioukov GS May-2003
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Storage part (2)
• Edb – presented in Gran-Sasso Oct-2000
• With minimal modifications is adopted to
both UTS & Sysal data
• Quite general format keep space for any
kind of raw emulsion data (base tracks,
microtracks, grains, images)
Valeri Tioukov GS May-2003
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Data storage scheme
• Run - is one session of the automatic scanning
• All information belongs to one run are stored in
correspondent file runXXXX.root
• Run contents is autosuffishient: 1 run keeps raw data and
all information needed for conversions&analysis
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comments about purpose of scanning
system information (hardware configuration and parameters)
emulsion information
calibration
timing
OUTPUT DATA
Valeri Tioukov GS May-2003
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Run file structure
runXXXX.root
Predictions
Calibration
All run-specific
information
Run header
Views tree
1 view is one
tree entry
head clust
seg tra
…
[…] […]
[…]
• root file is compressed on-fly
• portable to any operation
system
• easy on-line and off-line
analysis
• Data in tree are in “original”
coordinate system coming from
on-line. Information necessary
for convertions&corrections is in
header
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Raw data
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Raw data: view quality
Valeri Tioukov GS May-2003
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Raw data: area quality
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Linked tracks
Valeri Tioukov GS May-2003
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Linked tracks: signal
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Linked tracks: chi2
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Linked tracks: puls & chi2
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Linked tracks: distortion
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Aligned patterns
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One aligned dataset of CHORUS
data (8 plates)
Valeri Tioukov GS May-2003
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Conclusion
• Framework for reconstruction and interactive analysis of
emulsions data is under development
• The following modules are available:
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Storage clusses
Microtrack->basetrack linking
Patterns alignment
Tracks recognition
Signal&backgroung generation , simulation of apparatus effects
• To do:
– Parameters&algorithms optimization
– IO freezing
– Code export to CVS
Valeri Tioukov GS May-2003
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