[Eg6_analysis] meeting tomorrow

[Dupré Raphaël]

Hello Nathan,

Up to now, we never seen any phi dependence of the drift paths,
Mohammad will have to check this again now that things are working
better, but I do not expect any variation there.

The shift in phi when moving the beam comes from the fact that most
event comes from two sectors and are basically produced on the same
plan. There is no reason that applies while measuring events all over
the detector, then any shift would affect us.

Yes the shape of dphi gives the curvature, the overall shift is
apparently due to the shift during the amplification, we could check
that the value is not crazy there, but it does seem to work pretty
well since we have a phi centered on 180 right now!

Best,

On Fri, Mar 8, 2013 at 4:03 PM, Nathan Baltzell <baltzell at anl.gov> wrote:
> Hi Mohammad and Raphaël,
>
> It looks like maybe a global shift in dphi of about 1deg.
> I'm trying to understand, maybe you can help me:
>
> Is it correct that the drift paths calibration is independent
> of phi?  And this would be the same as ageraging over phi.
> And then is it understood why moving the RTPC would result in
> a global shift in the dphi calibration for a y-offset but not
> an x-offset?
>
> Is it the case that the shape of this dphi vs TDC distribution is
> what turns into track curvature, while an overall shift in dphi
> would just move the track in phi?  Or is that too naive?
>
> Sorry if I got this all wrong ....
>
> Thanks,
> Nathan
>
>
>
>
>
> On Fri, 08 Mar 2013 03:33:51 -0600, <hattawy at ipno.in2p3.fr> wrote:
>
>> Hello all,
>>   Following our meeting yesterday, here you can attached file with the
>> results. New parameters are needed, so i will start directly, i may not
>> finish today.
>>
>> Best regards,
>> Mohammad.
>>
>>
>>
>>
>>
>>
>>> Hello everyone,
>>>
>>> We will have eg6 meeting tomorrow, March 7, at 10am in F227.
>>> Agenda can be found at -
>>>
>>> http://clasweb.jlab.org/rungroups/lowq/wiki/index.php/Meeting_on_March_7_at_10:00am
>>>
>>> (thanks to Nathan)
>>>
>>> Calling instructions are at -
>>>
>>> http://clasweb.jlab.org/rungroups/lowq/wiki/index.php/Agendas_and_Minutes_of_the_meetings#Agendas
>>>
>>>
>>> Stepan
>>> _______________________________________________
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>>> Eg6_analysis at jlab.org
>>> https://mailman.jlab.org/mailman/listinfo/eg6_analysis



--
Raphaël Dupré