[Clas12_high_luminosity] Simulation Update

[Latifa Elouadrhiri]

Dear Whitney,

Thank  you for your e-mail. We can talk more next week when you are here 
at the collaboration meeting.

Best regards,

Latifa

On 2/17/16 6:56 PM, Whitney R. Armstrong wrote:
> Dear Latifa,
>
> Sorry for the delayed reply. I have simulated ~300M beam-on-target 
> events and am waiting for the scripts to produce the final plots.
>> 1.   your results show that the occupancies in RII are higher than RI.
>>   We need to understand that also.
>
> I am still working on my simulation to make sure I haven't missed 
> anything.  The first thing I can think of is the fact that I don't 
> have any detectors between the target and DC. But I don't think this 
> minimal material can explain the two orders of magnitude difference.
>
>> 2. Can you read the  Geometry data base the same as Mauri, if you could
>>   that will be the best. This way we can take out this input from the
>>   equation and we can focus on the simulation part.
>
> I am not sure what you mean by this: do you mean the ccdb, 
> reconstruction code, or the perl scripts? I can read the GDML he 
> sent.  As far as insensitive geometries, GDML is the best way to go.  
> The difficulties arise when we want to do sensitive geometries, which 
> is why I re-did the drift chamber from scratch.
>
>> 3. The graphs that Volker asked for are produced based on which one of
>>   your methods?
>
> Those are for the beam-on-target methods.
>
>> 4. In producing these graphs could you also have them by particle type?
>
> Yes. I am making the high statistics plots now but the low statistics 
> is found at
> https://clasweb.jlab.org/wiki/index.php/CLAS12_Drift_Chamber_Occupancy_Simulations#DC_Hit_Origins 
>
> I will update this page when the plots are done.
>
> I look forward to your comments and questions.
>
> Cheers,
> Whit
>
>
> On Fri, Feb 12, 2016 at 10:07:42AM -0500, Latifa Elouadrhiri wrote:
>> Dear Whitney,
>>
>> Yes it will be good to see your results with high statistics, to look 
>> at the details for the comparison between the 2 methods.
>>
>> I have 2 questions:
>>
>> 1.   your results show that the occupancies in RII are higher than RI.
>>   We need to understand that also.
>> 2. Can you read the  Geometry data base the same as Mauri, if you could
>>   that will be the best. This way we can take out this input from the
>>   equation and we can focus on the simulation part.
>> 3. The graphs that Volker asked for are produced based on which one of
>>   your methods?
>> 4. In producing these graphs could you also have them by particle type?
>>
>>
>> Best regards,
>>
>> Latifa
>>
>> On 2/12/16 8:14 AM, 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 
>>> 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
>>>>
>>>>
>>>
>>> _______________________________________________
>>> Clas12_high_luminosity mailing list
>>> Clas12_high_luminosity at jlab.org
>>> https://mailman.jlab.org/mailman/listinfo/clas12_high_luminosity
>>
>