[clas_members] [New Logentry] RC Daily Report

kuhn at jlab.org kuhn at jlab.org
Sun Jun 12 11:10:02 EDT 2022

Logentry Text:
Sat 6/11 - Sun 6/12:
* Beam tuning during Day shift, finally got reasonably good beam (see harp scans) and orbit locks.
* Raster calibration during Swing: Not able to find calibration wires with beam. Instead use the edges where rates go up dramatically and assume they are at +/- 10 mm in x and y.
* Took some rastered data with calibration target - see separate entries https://logbooks.jlab.org/entry/4001606,  https://logbooks.jlab.org/entry/4001616.
* Owl shift took data on empty (calibration) target without raster. First 15 nA with standard setup and DAQ (goal: find beam offset from CLAS12 nominal beamline using phi-dependence of z-vertex for exit and entrance foils), then 1 nA with zero torus and solenoid field for alignment.
* Switched target to 12C for next 24 hours.

There WILL be a RC meeting today at 2:00 p.m. at the usual Zoom coordinates - see https://clasweb.jlab.org/wiki/index.php/RGC_RC .


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/4001792
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