[Halla_running] [New Logentry] Hall-A Staus Update 12/12/2017

[yez at jlab.org]

Logentry Text:
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1) Yesterday afternoon the DC experts continued trouble shooting the XSEP4T (for 2nd-pass) and XSEP6T (for 3rd-pass), and in the end they were able to bring the 6T separator back on line. MCC spent the rest of the evening to setup the 3rd-pass  beam to Hall-A, which was roughly very smooth. At about 22:00pm, the tune beam was able to get into the hall and went into the dump directly. However, the 3rd Moller Quad could not be turned on which prevent the CW beam into our hall. During the Owl shift, we were not able to initialize the  beamline commissioning but had to stick with the 5uA tune beam for the entire night. The MCC were still able to use the tune to do more test to make sure there are no major issues. They did found two issues on the ion chambers but there was no much info they shared to us.

2) During the day-shift today, the first task is to get the 3rd Moller Quad fixed which required an immediate access to the hall for approximately 1 hr.

3) Meanwhile, we were still not able to ramp up the RD even after Jack found out that it was because of the poorly seated connector. While the DC experts are looking into the Moller Quad, Jack was notified that he can get into the hall to find out the problems.

4) We have some tune-beam on C12 target data (not many actually) that we may can use to learn the status of our triggers/detectors.

5) Once we have the Moller Quad fixed, we will continue on the beamline calibration. If the RHRS is ready, we can do the trigger and detector checkout on both arm.



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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/3503112
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