[Hps-analysis] SVT ECal relative alignment

[Stepan Stepanyan]

Norman,

On X-axis, is it really cluster_position-track_postion?

Stepan

On 7/29/15 1:13 PM, Graf, Norman A. wrote:
> Hello All,
>   I've taken the straight tracks from the field-off run 5784 and projected
> them to the Ecal. The residuals are plotted in the attachment using the
> z position of the cluster (which was essentially constant at 1393.7). Although
> the accuracy is quite good (~2.5 to ~3 mm) there are clear systematic
> shifts in both x and y for both top and bottom. Do these patterns make
> sense to anyone? I've also attached the cluster x-y positions, showing
> the fiducial cuts imposed on the clusters.
>
> I should note that these events were reconstructed using a non-production
> steering file. The calorimeter positions were taken from the uncorrected
> cluster collections pointed to by the ReconstructedParticle objects. The
> reconstruction did use the
>
> HPS-EngRun2015-Nominal-v2
>
> detector which has the SVT survey incorporated. Have the ECal survey numbers
> been incorporated into this detector? If not, are these shifts commensurate
> with any of the measured offsets?
> Thanks,
> Norman
>
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