[PEPPo] Weekly Meeting, Wednesday 11/9 @ 10:30EST

[Arne Freyberger]

I need to sit back and develop a path forward for PEPPo and any other 
future beamline experiments in terms of documentations and reviews.   It 
is clear that the nominal ATLis process is not quite sufficient to cover 
PEPPo.  The Mott installation was similar to the PEPPo, and  I'd be 
interested to learn what the process was for  the Mott.   The Hall 
process may be also provide a template, again I need to think about this.

In terms of Window damage due to beam, we really need to be careful and 
attempt to have engineered solutions instead of administrative 
solutions.  Statements like we will keep the current low 10nA or the 
beam mode  in tune mode, are administrative and  do not really count as 
protective measures.     Until we have a clear way to protect the window 
from a large power density beam (direct electron beam) we may have to 
lock the positron target in the in-beam position.

Arne


On 11/08/2011 11:59 AM, Eric Voutier wrote:
>
>     Sounds more than reasonable!
>
>     I would also add to the previous comments that even in the CW 
> runnning for polarimeter calibration,
>     beam currents will not exceed tens of nA, so no damage to the 
> vaccum windows are expected.
>     Eric
>
>
> Le 08/11/2011 11:22, Matt Poelker a écrit :
>> On the subject of "check out with electron beam", I am going to require
>> you to write a test plan, and to have it reviewed by knowledgeable Ops
>> staff, like Mike Spata, Jay Benesch, Geoff Krafft and/or Mike
>> Tiefenback.  The obvious big concern here....how do you plan to avoid
>> burning a hole in the exit foil downstream of the spectrometer?  and if
>> you do burn a hole in the exit window, what are the expected 
>> consequences?
>> Matt
>>
>>
>> Joseph Grames wrote:
>>> Dear PEPPo Collaborator,
>>>
>>> We will meet tomorrow Wednesday 11/9 at 10:30EST, locally in ARC428
>>> and by call-in is 757-269-6121.
>>>
>>> Eric&  I would like to discuss two topics:
>>>
>>> *System Readiness* - please post your punchlist of remaining tasks
>>> necessary to complete your system to the wiki, meaning all the steps
>>> you envision before we are in a position to use/test your system with
>>> beam.  This should include hardware, software, procedures,
>>> documentation, cables, labels, jobs in the service building, jobs in
>>> the tunnel.  Anything you can envision.
>>>
>>> == (WIKI) ==>  
>>> https://positron.jlab.org/wiki/index.php/November_9%2C_2011
>>>
>>> *Check-out with electron beam* - please prepare a straw man for the
>>> first test you would like to perform with 6.3 MeV electron beam,
>>> meaning who will/can do the test, prerequisites, clock hours needed,
>>> possible accesses needed, range of beam current or polarization,
>>> hardware/software configurations.  Beam tests plans should be
>>> submitted using ATLIS (go to web site, login, choose create, pick a
>>> title beginning with "PEPPO:", fill in the blanks the best you can).
>>> If offsite then use proxy to access web site.
>>>
>>> == (ATLIS) ==>   http://opsweb.acc.jlab.org/CSUEApps/atlis/atlis.php
>>>
>>>
>>>
>>> ------------------------------------------------------------------------ 
>>>
>>>
>>> _______________________________________________
>>> PEPPo mailing list
>>> PEPPo at jlab.org
>>> https://mailman.jlab.org/mailman/listinfo/peppo
>>>
>>
>
>
> _______________________________________________
> PEPPo mailing list
> PEPPo at jlab.org
> https://mailman.jlab.org/mailman/listinfo/peppo

-- 
Arne Freyberger
Director of Accelerator Operations
Jefferson Lab           Office: (757) 269-6268
12000 Jefferson Avenue  Cell:   (757) 876-6289
Newport News, VA 23606  Email:  freyberg at jlab.org

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