[Eg6_analysis] Checking the performance of the extracted drift speed corrections

[hattawy at ipno.in2p3.fr]

Hello Nathan,
   For the new region which is around 2 rad in phi, it is not totally new
region. If you see in the previous cooking it exists but not very
clear.

   About the 60% increase in the 1.2 GeV, yes the TDCmax and the drift
speed they are consistent in the two method with a variation of 1%. It
is not clear for me why we have this increase. It might be the fact
that we compared the drift speed of the golden elastic events to the
one of good tracks. If you can have a look at the two versions of
cooking for 1.2 runs, you will see the distributions of sdist, edist
and the other parameters getting narrower in the new cooking, while
they have been wide before and large number of the tracks they were not
included in the initial drift speed comparison.
   The new cooked files are in:
/volatile/clas/claseg6/gempass1_v2/6gev/
/volatile/clas/claseg6/gempass1_v2/1p2gev/

   The old cooking are in:
/volatile/clas/claseg6/gempass1_v1/6gev/
/volatile/clas/claseg6/gempass1_v1/1p2gev/

Best regards,
Mohammad.



> Hi Mohammad,
>
> Looks like you also picked up a region of phi that didn't even exist
> before (~2.2 rad)!
>
> Is it correct that there is 60% increase even in the 1.2 GeV runs that
> were being used
> for the previous calibrations?  I thought old and new drift speed were
> consistent there?
>
> And can you tell me where these newly cooked 10 runs are?
>
> Regards,
> Nathan
>
>
>
> On Thu, 16 Jan 2014 09:57:42 -0600, Mohammad Hattawy
> <mohammad.hattawy at gmail.com> wrote:
>
>> Dear all, As we have seen from the previous studies, the drift speed is
>> changing during the experiment. I have been working on correcting the
>> drift speed. New correcting >parameters are extracted and implemented in
>> the cooking package. Selected 10 test runs were recooked with these new
>> modifications.
>> I did a study of the performance of these corrections. As a result, we
>> collect more good tracks in the RTPC. This incease is ranging from 60%
>> to 126%.  A detailed >study can been found here:
>> https://clasweb.jlab.org/rungroups/lowq/wiki/index.php/Drift_Speed_Correction:_Results
>>
>>  Comments and suggestions are greatly appreciated.
>>
>> --Best regards,
>> Mohammad Hattawy._______________________________________________
> Eg6_analysis mailing list
> Eg6_analysis at jlab.org
> https://mailman.jlab.org/mailman/listinfo/eg6_analysis
>