[Bonuslist] [Revised Logentry] Hall B RC Daily Report

[narbe at jlab.org]

Logentry Text:
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Overnight, brought in beam to tagger and then FC. It was difficult to center beam on target due to BPMS https://logbooks.jlab.org/entry/3819226

05:00 After the target scan using 2c24A, Stepan suggested to use x=-0.1 and y=-+1.0 (mm) as nominal position to run for now until BPM 2H01 is fixed.

05:55 Had some lifetime issue on DAQ (couldn't see that nor trigger rate) S. Boyarinov worked on it https://logbooks.jlab.org/entry/3819273

07:31 MCC calls. After talking with BPM expert who suggested using BPM 2H00 today until tomorrow when he can calibrate 2H01. Said 2H00 is reliable as long as we run at least 7 nA for beam current. 

08:00 E. Pasyuk on expert shift, helping with B-field study. Target at about 65psi. 

09:47 E. Pasyuk discussed 70% livetime with S. Boyarinov. He found that this is coming from the micromegas, based on the current beam current and trigger rate.   


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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/3819361
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