Validating Beam Monitoring Data

This document lists how beam monitoring data is validated and watched for problems. There are two parts to this:

  1. Data Integrity Validation checks that the data is being read out and delivered to files correctly and with high efficiency.
  2. Data Quality Validation checks that the physical parameters of the beam and setting of beam devices are adequate for quality physics and are stable over time.

To put in this validity checking, a process will run 3 times a day about 1 hour after both the beam monitoring and SpillTimeND DB tables are updated. This lets both disk file and database tables be used in constructing the validation histograms. It will become shift duty to browse these histograms, look for deviations or changes and notify experts when problems are found. Some items will be entered into forms. In particular this will include "human induced" things like target position and horn currents.

The rest of this document lists the plots needed in the two categories.

1 Data Integrity Validation

  1. Walk SpillTimeND, histogram time to nearest BeamMonSpill.
  2. Same, but as a profile histogram in bins of 15 minutes.
  3. Histogram missing devices, binned in 15 minutes. This includes at least the toroids, BPMs, PMs, had/mu monitors, target and horn related.
  4. Differences in toroids, both as single histogram and 15 minute binned profile.

2 Data Quality Validation

  1. Mean beam position at target, beam widths and intensity per spills.



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Last update Tue Oct 18 16:22:47 2005.