[Tpe] plots shown during OLTWG meeting today

[Puneet Khetarpal]

Hi Eugene,

Per your request, I've plotted the vertex, momentum, theta and path
length as function of the rf offset for different clas sectors:

https://clasweb.jlab.org/rungroups/tpe/wiki/index.php/Timing_Checks

Thanks,
Puneet

"No word is true until it is eaten" - 36 Lessons of Vivec, Sermon 27



On Tue, Jun 28, 2011 at 4:51 PM, Puneet Khetarpal <puneetk at jlab.org> wrote:
> Hi Eugene,
>
> We checked this behavior with a zero minitorus runs, plots # 190, 192,
> 194, and 196 in the following link:
>
> https://clasweb.jlab.org/rungroups/tpe/wiki/index.php/Paddle_to_Paddle#Zero_Mini_Torus_Runs
>
> We see similar issue without the minitorus in the picture.
>
> Thanks,
> Puneet
>
> "No word is true until it is eaten" - 36 Lessons of Vivec, Sermon 27
>
>
>
> On Tue, Jun 28, 2011 at 4:21 PM, Eugene Pasyuk <pasyuk at jlab.org> wrote:
>> A few thoughts.
>> Could it be an effect of the minitorus? If you have runs with different
>> minitorus current maybe it is worth to check too.
>> Sectors 5 ans 6 seems to be different from others on theta-phi plots.
>> Therefore when you generate plots like Z, momentum and pathlength would be
>> also good to do it by sector.
>> I did not understand you sentiment about energy losses. At these momenta all
>> electrons and positrons are ultra relativistic and minimum ionizing. Even if
>> you consider different path length, still the deviation of beta from unity
>> due to possible difference in energy losses is not measurable with timing
>> resolution we have.
>> You may also have some pions in your data set. Can compare them with
>> leptons.
>>
>> -Eugene
>>
>> On 6/28/11 11:17 , Puneet Khetarpal wrote:
>>>
>>> Hi All,
>>>
>>> Robert and I showed the following plots today at the OLTWG meeting.
>>>
>>> https://clasweb.jlab.org/rungroups/tpe/wiki/index.php/Timing_Checks
>>>
>>> The following comments/suggestions were made:
>>>
>>> 1. There could be a disparity in the eloss from CLAS for the electron
>>> and positron
>>> 2. We should check 1/2 torus and 0 torus runs (if we have any) as well
>>> 3. Look at path length of the leptons as a function of the offset
>>> 4. Look at the same distributions with an elastic proton selected
>>>
>>> Other comments and suggestions are welcome.
>>>
>>> Thank you,
>>> Puneet
>>>
>>> "No word is true until it is eaten" - 36 Lessons of Vivec, Sermon 27
>>> _______________________________________________
>>> Tpe mailing list
>>> Tpe at jlab.org
>>> https://mailman.jlab.org/mailman/listinfo/tpe
>>
>