[BTeam] [EXTERNAL] Follow up on Hall B Halo Rates Troubleshooting

[Sebastian Kuhn]

Just a small addition: We have already tried re-centering the beam on the target structure - TWICE - and also changing the angle with which it comes into the Hall. Nothing changed the background, and we could not find any obstructions other than the known target walls, which we avoid by centering the beam.

- Sebastian

On Aug 28, 2020, at 6:01 AM, Brian Freeman <bfreeman at jlab.org<mailto:bfreeman at jlab.org>> wrote:


  1.  We could simply try angle and position changes into the target ? It looks like things got really noisy after a target change in the hall on the 15th, probably a coincidence (https://logbooks.jlab.org/entry/3835820) . I believe that the Midstream counters sit around the Target somewhere, and Downstream counters are after CLAS. So perhaps we just have a bad angle going into the Target? ( 1hr )

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