Difference between revisions of "BCAL reconstruction 01/16/2012"
(→Z resolution) |
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[[Image:Zdiff vs E point.png]] | [[Image:Zdiff vs E point.png]] | ||
| − | + | Below are the sigmas of the (z_point-z_truthcell) distributions for different slices of E: | |
[[Image:Sigma zdiff vs E point.png]] | [[Image:Sigma zdiff vs E point.png]] | ||
| − | 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) | + | 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 ??? | Something strange going on here ??? | ||
| − | + | Below is (z_point-z_truthcell) for a range of energies in the anomalous region shown above: | |
[[Image:Zdiff histo6.png]] | [[Image:Zdiff histo6.png]] | ||
Revision as of 16:35, 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:
Below are 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 ???
Below is (z_point-z_truthcell) for a range of energies in the anomalous region shown above:
