[Clas12_high_luminosity] Simulation Update

[Whitney R. Armstrong]

Volker,

I have added some comments below.

On Fri, Feb 12, 2016 at 08:14:39AM -0500, burkert wrote:
>Whitney,
>
>Thanks for your response. The graphs are of interest, however, I 
>believe they are not the same as the ones Mauri is showing. Mauri can 
>correct me, but I think he is plotting the z position along the 
>beamline where any of the hits in the chambers originated from.

This is exactly what I am showing. For clarity, I have attached the 1D 
projection along Z (which is the same for both 2D plots).
Note the units are cm.

Cheers,
Whit

>This allows one to determine the material around the beamline that caused the 
>hits even if it goes through secondary and tertiary stages. You expect then a 
>peak at the target for direct hits, and hits coming.  e.g. from Moeller 
>electrons produced in the target but hitting a beamline element further 
>downstream that causes a shower and subsequently hits in the chambers.  Such a 
>1-D plot will allow us to compare your simulations with Mauri's and identify 
>structures along the beam that may present obstacles to the Moeller electrons.
>
>Volker
>
>
>
>
>On 2/11/16 8:42 PM, Whitney R. Armstrong wrote:
>>Hi Volker,
>>
>>I have produced two graphs, however, with limited statistics 
>>(~1.5M). Many more jobs are running on the farm right now.
>>
>>The first shows (in cylindrical coordinates) the radial vs z 
>>position of the starting point for the trajectory that ultimately 
>>produced at hit in the DC.
>>
>>The second shows the wire number of the DC hit vs the same z as above.
>>I will post these results on the wiki when I have gathered more 
>>statistics.
>>Your comments and questions are appreciated.
>>
>>Cheers,
>>Whit
>>
>>
>>On Thu, Feb 11, 2016 at 08:37:45AM -0500, burkert wrote:
>>>Hi Whitney,
>>>
>>>Could you produce a graph similar to the one from Maurizio 
>>>(attached) showing where along the beamline (z-coordinate) the 
>>>chamber hits originate from.
>>>
>>>Volker
>>>
>>>
>>>On 2/11/16 1:41 AM, Whitney R. Armstrong wrote:
>>>>Dear Collaborators,
>>>>
>>>>First, I have posted some follow-up slides to our discussion on 
>>>>Monday. The new plots have a hit definition that is consistent 
>>>>with Maurizio's.
>>>>You can find my slides and the follow slides at https://clasweb.jlab.org/wiki/index.php/CLAS12_High_Luminosity_-_February_8,_2016
>>>>
>>>>Secondly, as suggested by Latifa, I have performed a self 
>>>>consistency check using the beam on target method previously 
>>>>used. Furthermore, I am using the same beamline geometry as 
>>>>Maurizio, who has graciously provided a GDML version of the 
>>>>geometry.
>>>>
>>>>Please see the following page for the latest results and 
>>>>discussion of the simulations. https://clasweb.jlab.org/wiki/index.php/CLAS12_Drift_Chamber_Occupancy_Simulations
>>>>
>>>>So far the main conclusions are that my simulation is self 
>>>>consistent, and perhaps more importantly, I am getting 
>>>>significantly larger DC occupancies.  The cause of this 
>>>>discrepancy remains unclear.
>>>>
>>>>Any comments or questions are greatly appreciated.
>>>>
>>>>Cheers,
>>>>Whit
>>>>
>>>>
>>>
>>
>>
>>>_______________________________________________
>>>Clas12_high_luminosity mailing list
>>>Clas12_high_luminosity at jlab.org
>>>https://mailman.jlab.org/mailman/listinfo/clas12_high_luminosity
>>
>>
>

-- 
Whitney R. Armstrong
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