[Halla_running] [EXTERNAL] RC Update February 9th

[Sean Jeffas]

We have beam on He3!

Ops spent most of yesterday fixing the optics to send beam to hall A
without tripping. Finally around midnight they started harp scans, with
spot sizes to big. As they were working on harps they lost connection with
harp B, which required an access to the hall, which is now fixed. Finally
the beam spot size was small enough around noon today and we quickly moved
on through the beam checkout and on to He3. We are now running 45 uA on He3
and the last polarization was 50%.

The upstream ion chamber was a bit (~20%) higher than previously found (
https://logbooks.jlab.org/entry/4127432). MCC claims it is likely some
bleadthrough from hall C and they will make sure to monitor it.

The BBCal was found to have some empty blocks (
https://logbooks.jlab.org/entry/4127454) covering about 20% of the active
area. BBCal experts have been notified and are looking into it.

We will have a meeting today to discuss the status and issues.

Meeting:
We will meet at 3.30pm today (upstairs in the counting house) or on zoom:
https://urldefense.proofpoint.com/v2/url?u=https-3A__jlab-2Dorg.zoomgov.com_j_1619032184-3Fpwd-3DaWhTVWxya1ZZQzA1K2ZPSTd2ZX&d=DwIBaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=cE_5H9I241Ivk1xpqB8Fq0UiLTkf4zMIQ6sedLYb2m8&m=pM3EMEjZ0C-vLtL9RdumUwiOxUP905xZtApzP-cUvg3nYNb9R8kaFUvPV62uZacm&s=V9b7tNEI4R0K2vlXlSqouCj0jVFC5cTYvbRp4NFzZR8&e= 
Meeting ID: 161 903 2184
Passcode: 260715
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