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  • Change the way the distance of closest approach is calculated when the POCA occurs exactly at the head of the track
    • This effects some events track which graze side tiles (and a very few which graze to tiles), but only when the distances of closest approach is quite large
  • Use the hardware veto information instead of the energy information in counting number of tiles hit in the Merit Variables
    • This handles issues with the slower timing of the PHA electronics

Testing and Comparison

  Merit Variables that stayed exactly the same

Variable

Plot

Acd Tile Count (also AcdNoRow3Readout):  

Image Added

AcdRibbonCount:

Image Added

<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="d04a2e6c-b627-4e25-b83c-80a9eef19c4c"><ac:plain-text-body><![CDATA[

AcdTileEnergy (also AcdEnergyTop, AcdEnergyRow[0-3]): 

!AcdTotalEnergy.gif

thumbnail!

]]></ac:plain-text-body></ac:structured-macro>

AcdRibbonEnergy: 

Image Added

AcdCornerDoca:

Image Added

AcdTkr1CornerDoca:

Image Added

 

 
 

Variables that changed slightly because we are using the hardware veto to count hits instead of the Energy corresponding to an expected veto

Variable

Plot

<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="3e8a0009-51b5-4ecd-a962-c06f61c5d3d8"><ac:plain-text-body><![CDATA[

AcdNoTop (and AcdNoSideRow[0-3]):

!AcdNoTop.gif

thumbnail!

]]></ac:plain-text-body></ac:structured-macro>

 
 

 Changes in the AcdTkr1ActiveDist set of variables

Variable

Plot

Comments



AcdTkr1ActiveDist:  
All Events

Image Added

Combination of 3 effects:

  1. Selection of which associtation to use
  2. DOCA calculation for case where doca occurs at head of track
  3. Entries lost b/c sigma > 10000 (stripe at -2000)

AcdTkr1ActDistTileEnergy:
All Events:

Image Added

Combination of 2 effects:

  1. Selection of which associtation to use 
  2. Entries lost b/c sigma > 10000 (stripe at -2)

AcdTkr1ActiveDist:
 Events where POCA occurs above track

Image Added



This shows the selection effect from moving from the largest active distance
to the combination of active distance, error projection and signal size.



AcdTkr1ActiveDist:
Events where POCA occurs at track start

Image Added

Combination of 2 effects:

  1. DOCA calculation for case where doca occurs at head of track
  2. Entries lost b/c sigma > 10000.  (stripe at -2000)