[Hallb] [New Logentry] RC summary meeting April 30th

[mineeva at jlab.org]

Logentry Text:
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- Target: We continue production ran LD2+Sn at 65 nA that we started yesterday late morning. The projected current for LD2+Sn double target was 70 nA, however, following luminosity scan we observed that while SVT multiplicities were fine and okeyed by Yuri for this current value, the DC occupancies were high, reaching up to 9-10% in the occupancy 2D plots. For this reason we are running at 65 nA.

- Detectors: BMT started to trip again around midnight on S3 L5, this is the same channel as the one we had issues with during empty LD2 + Pb ran at high current. BMT HV S1 L4  tripped and was masked. Rafo did the pedestal ran for this channel, however, it needs to be redone when there is no beam. We had issues with DAQ, needs to be rebooted when in controlled access.

- Accelerator: starting around 6.45am on Wednesday accelerator will go down for maintenance, by 8am we should be in restricted access. So far we will have in the hall: James Brock (resetting of flow meter on the cryotarget), Sergei (reboot the DAQ) and Eugene + (safety walk) in the rapid access. 



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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/4292999
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