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HarpFitter: IHA2C04 As-found after 2T09V steering, B target size blown
Scan of harp_2H00A
Scan of harp_2H00A
ATLis Comments Daily Digest
Log Number: 4499676Logbook(s): Tags: Body:
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ATLis Comments Posted 18:00 Thursday May 14 through 18:00 Friday May 15
Accel Computing Group
Upgrade EPICS Controls for new Injector SLM Camera
2026-05-15 09:05 - Scott Higgins
Scan of harp_2H00A
Scan of harp_2H00A
Hall B upstream halo reduced with 2T09V steering
Log Number: 4499671Logbook(s): Entry Makers: alexsBody:
Increasing Hall B's current to 17 nA showed two problems: the beam does not appear centered around the target (Figure 1: bright circle should be centered around center black rectangle), and elevated upstream halo rates that did not show up at low current. The first goal was to zero halo rates. Adjusting positions at 2C21A, 2C24A, and 2H01 vertical and horizontal showed no effect on halo rates (Figure 2). Other halls' bleedthrough also proved to not currently be affecting halo rates (figure 3).










