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Dear all,<br>
<br>
As of last night CEBAF accelerator was able to deliver CW beam to
Hall-D.<br>
This is a very important milestone, indicating that the 12 machine
is ready <br>
for physics. In fact, the beam time accounting recorded more than 2
hours <br>
of beam for physics. Beam delivery to other halls, A and B, depends
on the <br>
success in the beam commissioning for the Hall-D, and commissioning
of <br>
the RF separators. Both are expected to be completed this week. <br>
<br>
As of today, it looks like the machine will be able to start the
Hall-B beamline<br>
commissioning (to the tagger dump) as early as next Tuesday,
November 4,<br>
or (most likely) on Wednesday, November 5. We expect it will take a
week++<br>
to get the upstream beam line commissioned and get a physics quality
beam<br>
to the tagger dump. The beam commissioning for HPS will follow after
that. <br>
<br>
<b>SHIFTS:</b><br>
During the beamline commissioning period, from November 4 to
November 22, <br>
and before start of the official HPS shifts, we need to man the
Hall-B counting <br>
room. As we planned earlier, shifts will be covered by the local
collaborators. <br>
So please, send me an email by the end of the week on your
availability for shifts, <br>
indicating days and times. We will keep the same shift hours as it
is now set for HPS - <br>
experts: 8am - 4pm, 4pm - 12am, 12am - 8am<br>
workers: 7am - 3pm, 3pm - 11pm, 11pm - 7am<br>
It is likely that the day shifts will be canceled due to work in the
Hall, but for now we <br>
assume that it 7/24 operations (max 54x2 shifts). <br>
<br>
Regards, Stepan<br>
<br>
<br>
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