[Clas_cascades] simulation time problem?

[Zhiwen Zhao]

hi, All

I just realize that I didn't commit the change I made last week on wiki.
Fortunately, I still have the window open, so I can recover it.
Please take a look again
http://clasweb.jlab.org/rungroups/eg3/wiki/index.php/Eg3_simulation

Zhiwen

On 4/21/2010 6:13 PM, Zhiwen Zhao wrote:
> Hi, All
>
> http://clasweb.jlab.org/rungroups/eg3/wiki/index.php/Eg3_simulation
> I add more plots and description, particular the plots use vertex time
> calculated without vertex term.
>
> I still think the time in SCPB is calibrated TOF time so it can be used in the
> formula without additional "starttime" mentioned by Stepan.
>
> For data, the photon time in tagger is calibrated at target center, so to
> compare it to particle vertex time, the vertex term is needed. For sim, if I use
> photon time at target center, the vertex term is needed too. As shown in those
> plots,the vertex term will make peak sharper and nicer for data and sim.
>
> The main problem I have now is the time diff is not centered around 0 for sim, I
> will need photon time = (-56)/c_light to make that happen( please refer to the
> plots). This makes me wonder either some of my understanding is wrong or my
> simulation configuration is wrong.
>
> Please comment.
>
> Thanks a lot
>
> Zhiwen
>
>
>
> _______________________________________________
> Clas_cascades mailing list
> Clas_cascades at jlab.org
> https://mailman.jlab.org/mailman/listinfo/clas_cascades