Difference between revisions of "BCAL reconstruction 01/16/2012"
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Look at individual '''DBCALPoint''' = upstream hit + downstream hit in same BCAL cell, with energy corrected for attenuation, z determined by time difference of the two hits. | Look at individual '''DBCALPoint''' = upstream hit + downstream hit in same BCAL cell, with energy corrected for attenuation, z determined by time difference of the two hits. | ||
| − | Can get "truth" information about how much energy deposited and where from '''DBCALTruthCell'''. | + | Can get "truth" information about how much energy deposited and where from '''DBCALTruthCell'''. Since these correspond to SiPM cells, must sum several DBCALTruthCell to correspond with one DBCALPoint. |
| − | Compare '''DBCALPoint''' with | + | Compare '''DBCALPoint''' with sum of corresponding '''DBCALTruthCell''' 's. |
=Z resolution= | =Z resolution= | ||
Revision as of 16:30, 16 January 2012
Look at individual DBCALPoint = upstream hit + downstream hit in same BCAL cell, with energy corrected for attenuation, z determined by time difference of the two hits.
Can get "truth" information about how much energy deposited and where from DBCALTruthCell. Since these correspond to SiPM cells, must sum several DBCALTruthCell to correspond with one DBCALPoint.
Compare DBCALPoint with sum of corresponding DBCALTruthCell 's.
Z resolution
Can look at z-resolution (z_point-z_truthcell) vs E_point:
Plot the sigmas of the (z_point-z_truthcell) distributions for different slices of E:
The curve shown is 1.5 cm/sqrt(E), which is already higher than the nominal z-position resolution sigma_z = 1.1 cm/sqrt(E)
Something strange going on here ???
Look at (z_point-z_truthcell) for a region near the top of the peak:
