ACD Recon Upgrade

Use Pattern Recognition in addition to GEANT model to determine which tiles and ribbons to associate with tracks
- This allows us to handle near misses, which is needed to do efficiency studies
Have information be associated with tracks, instead of having a single big set for the whole event
- This makes using the event display much easier
- This makes getting access to information in Recon root files easier
Handle track errors correctly
- This wasn't being done before
- This looks nice in the event display
Sort ACD - track associations by a combined signal size/ distance quality measure instead of using only distance
- This gets rid of problems with shadowing, where one association with a small signal masked another nearby one with a larger signal
Always calculate gaps to tiles
- Before this was a hodge podge, we had to handle cases where the track hit ribbons, tiles and missed everything differently.

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

Variable	Plot
Acd Tile Count (also AcdNoRow3Readout):
AcdRibbonCount:
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="f270bc15-d22e-4f46-b7c9-22e80896632f"><ac:plain-text-body><![CDATA[	AcdTileEnergy (also AcdEnergyTop, AcdEnergyRow[0-3]):	!AcdTotalEnergy.gif	thumbnail!	]]></ac:plain-text-body></ac:structured-macro>
AcdRibbonEnergy:
AcdCornerDoca:
AcdTkr1CornerDoca:

Variable	Plot
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="05560253-7d21-45a0-8488-007ece32fef6"><ac:plain-text-body><![CDATA[	AcdNoTop (and AcdNoSideRow[0-3]):	!AcdNoTop.gif	thumbnail!	]]></ac:plain-text-body></ac:structured-macro>

Variable	Plot	Comments
AcdTkr1ActiveDist: All Events		Combination of 3 effects: Selection of which associtation to use DOCA calculation for case where doca occurs at head of track Entries lost b/c sigma > 10000 (stripe at -2000)
AcdTkr1ActDistTileEnergy: All Events:		Combination of 2 effects: Selection of which associtation to use Entries lost b/c sigma > 10000 (stripe at -2)
AcdTkr1ActiveDist: Events where POCA occurs above track		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		Combination of 2 effects: DOCA calculation for case where doca occurs at head of track Entries lost b/c sigma > 10000. (stripe at -2000)