Data Acquisition

Work Flow

When a data taking run is over(typically 8 hours):

Bulk rec uses majority of tier0 resources.

• AOD: Analysis Object Data, physics output like electrons, muons, tracks, etc.
• HIST: Histograms for monitoring.
• ESD: Event Summary Data, contained detailed reconstruction output like calorimeter cells and tracking hits (not produced for physics_main)
• DRAW/DESD: for selected events.

Calibration Loop over express stream:

• Histograms to monitor.
• Alignment work of inner tracker can be done.
• The beamspot is determined (with new alignment).

Defects and GRL: take Muon DQ as an example: MyMuonDQTutorial. Good quality of data, 'quality' measured by subdetector performance.

Practical info

Data Streams

Different data stream, coming from different trigger chain, for different purpose

• Express stream
• Physics_main
• B physics stream
• Zero Bias
• Min-Bias , etc..

Dataset Nomenclature:

Useful links

• TDaq Acronyms: What's ROB, ROD, ROL?
• Raw Data Format

-- RongkunWang - 2019-05-03