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EMC-EMT-GLT Calibrations

There are many different calibrations that can be done between the EMC, EMT & GLT. I will take time here to describe the primary ones between the EMC & EMT 

EMC -EMT

Before running this calibration you must first ensure that neither the EMC or EMT are in use by anyone since other calibrations such as light pulser will badly affect the results. 

    EMC EMT Noise Tower Calibration

    There are several steps to this and I will attempt to go through them as thoroughly as possible. 
    • Run cratestart from 

Explanations of above plots

    •  Global Output ocupancy for M
      • These shown the number of times that the M trigger primitve from the EMT has fired off. They can also be usefull as a first check to see if a patricular channel has gone "hot". 

        • Example 
         
    • Global Map for M against time. 
        • This shows the tick on which the M has on average firedd of to the GLT. This also show easily a hot channel since it will stop having a peak and instead show a constant bar. 
        Example 
         
    • Theta V Phi occupancy
        • This plot gives a map of hit positions in the calorimeter. For cosmics rays there is the twin peak areas of the top & bottom of the detector. A hot tower will show up as a large square block. 
        Example 
         
    • Phi energies verses Time for all Phi strips
        • With this plot one can see the exergy deposition peak developing. This should be centered around tick XX. 
        Example 
         
    • Phi - (X+Y), X & Y occupancy for energy cuts of 0, 100 & 500MeV for each phi strip.
        • These 9 plots give an energy deposition history for each phi strip. Cuts are applied to give an indication of relative rates. 
        • X is the forward endcap.
        • Y is the rear most 2 towers of the barrel.
        • Phi - (X+Y) the remaining 4 towers in each phi strip.
        Example 
         
    • Energy in all strips for Phi-(X+Y), X & Y.
        • This shows the actual energy spectra for all phi strips in the same areas as above. The maximum value is configuarble in the tcl script that is used to run the fast mon. 
        Example

Running the EMT Fast Monitoring

     It is generally assumed that if it is necessary run the EMT spcifiic fast monitoring then there is a problem that has shown up in the histograms and as such the expert flag would have to be set to produce more detailed output. Currently work on this is ongoing and as such won't be described here as yet.