[Bteam] B team meeting Wednesday

[Jay Benesch]

There will be a B team meeting after the 1:30 scheduling meeting 
Wednesday.  Bob Legg will be taking over as PD.

Background

Hall A magnets are cold.  Target cool-down today if ESR stable.
http://www.jlab.org/~adaq/halog/html/1010_archive/101005120007.html
Magnet power supplies are still being repaired - PREX radiation damage. 
  They hope to do a BCM calibration Thursday and might be ready to start 
physics immediately after that.  Or might do another access.

Hall B will be going down Thursday 7am to change from calibration to 
production mode.  Survey has to do their thing after the change so if 
it's not 7am Thursday it will be 7am Friday.

Hall C target cooldown is now planned for Thursday.

CHL will have to raise pressure about 1 mbar from 39.4 mbar to free up 
capacity to cool 2500W Qweak target.  FEL will squawk when this happens 
because they'll have to turn down FEL03, aka first C-100 prototype, 
because internal tubing is too small.

If hall A goes into access after their BCM calibration Thursday there 
will be a maintenance/beam studies period of TBD duration.  I'll try to 
remember to ask at 0745 Wednesday.  See also
http://www.jlab.org/~adaq/halog/html/1010_archive/101005113902.html

Agenda

1. beam studies and maintenance plan for Thursday and Tuesday

2. discussion of path length test results.  Plot in doc file attached. 
All the data is in /a/opsuser/benesch/Pathlength_31.txt

3. discussion of Noel's request below


> B-Team Colleagues,
>
> It has become apparent that we can do a better job of verifying a good
> machine setup after any SAD or extended accelerator down period. Right
> now, Operations relies mainly on the successful execution of the Optics
> Restoration and Finalization Procedure (ORFP) to define what a "good"
> setup is. My concern is that there are other important--or what I'll
> call "expert" machine parameters--not captured in the ORFP that can
> affect the final outcome. The process of "setting up" the machine
> usually takes several shifts and progresses from a rough spin up to a
> final tune of the beam transport and optics. This extended process,
> coupled with the range of experience for both the Ops and on-call staff,
> can result in a less than desirable setup that can sometimes come back
> and bite us days later.
>
> I ask the B-Team for help with this issue, first by performing a
> thorough review and update of the ORFP procedure, and second, by
> developing a final verification process for checking the beam transport,
> machine parameters and optics setup. I believe it is important that
> Optics On-call be an integral part of the final "blessing" of the
> machine setup to provide an overall check and address any of the subtle
> expert issues that can impact beam transport.
>
> Noel
> _______________________________________________
> Bteam mailing list
> Bteam at jlab.org
> https://mailman.jlab.org/mailman/listinfo/bteam

-------------- next part --------------
A non-text attachment was scrubbed...
Name: pathlength_test_sept2010.doc
Type: application/msword
Size: 30208 bytes
Desc: not available
URL: <https://mailman.jlab.org/pipermail/bteam/attachments/20101005/ba977a21/attachment-0002.doc>