[Halld-online] [New Logentry] CDC straw positions shifted in phi

[davidl at jlab.org]

Logentry Text:
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The combined BCAL/CDC cosmic run showed small issues with the alignment of both the CDC and the BCAL. The BCAL was rotated by 1/2 module w.r.t. what was in the software. This has since been fixed and is now corrected in all of the pictures below. The CDC stereo straws were also indicating problems since many tracks had stereo wires not crossing the track itself. This was tracked down by Naomi, Curtis (with some help from Simon) to be straw numbering issue where many of the layers had straw 1 in the software shifted by ~5 wires.

This was fixed in the XML and the results are shown in the pictures below. These show 2 different events with a before and after version. The fix is not yet committed to the repository due to changes committed just recently (today) relating to the GEANT4 effort. Once those changes have been resolved with this fix, that will be checked in and made available as well.

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This is a plain text email for clients that cannot display HTML.  The full logentry can be found online at https://logbooks.jlab.org/entry/3288879
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