[Tpe] plots shown during OLTWG meeting today

[Puneet Khetarpal]

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
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>