Offline Analysis Commissioning

Introduction

This document describes the goals of the offline analysis that will be carried out during the fall 2014 commissioning run of Hall D.

Data Validity Checks

Once data are being transferred from the counting house to the computer center, it necessary to verify the integrity and validity of the data on tape.

1. Can the data be read by the offline code?
   • Does the analysis code run over the data files?
   • Are there events in the data files?
   • Do the number of events match what is expected?
   • Is the average event size as expected?
2. Can the data be decoded?
   • Tagger hodoscope data?
   • Tagger microscope data?
   • Pair spectrometer data?
   • Start counter data?
   • Central drift chamber data?
   • Forward drift chamber data?
   • Time of flight data?
   • Barrel calorimeter data?
   • Forward calorimeter data?
3. Are all expected detectors reporting?
   • Are all channels present in each of the detector systems?
   • Are the recorded values within expected ranges?

Detector Specific Data

 2)  Once the data are verified, we need to look in detail at each detector.
    i)  Are all channels present in the data?
   ii)  Are the data in the expected ranges (values)?

High-level Analsysis

 3)  High-level analysis
    i) Can we reconstruct tracks in the chambers?
   ii) Can we reconstruct photons in the calorimeters?
  iii)  Do we see photons in the tagger and microscope?
  iv)  Event reconstruction?