[Halld-offline] DBCALIncidentParticle

[Zisis Papandreou]

Hi gents:  my impression is the same as Richard’s and David’s.  When Tegan comes in this morning I’ll have him comment as well.  Cheers, Zisis...

> On Mar 4, 2016, at 8:36 AM, David Lawrence <davidl at jlab.org> wrote:
> 
> 
> Hi All,
> 
> Richard is correct. The intent was to use this information in mcsmear to determine adjustments
> to the BCAL response based on simulations Andrei did some years ago. I thought that Tegan 
> was working on this recently (within the last few months). I don’t know what the status is though.
> 
> Regards,
> -David
> 
> On Mar 4, 2016, at 9:03 AM, Richard Jones <richard.t.jones at uconn.edu <mailto:richard.t.jones at uconn.edu>> wrote:
> 
>> Mark,
>> 
>> From the name, I infer that this is an object that captures the information from the <bcalTruthIncidentParticle> tag in the simulation event hddm record. Any time a particle in the MC simulation enters the bcal through the inner surface, its coordinates, type, and momentum are recorded in a <bcalTruthIncidentarticle> tag that gets added to the output event. At the same time, a stamp is placed on that particle so that neither it nor any secondaries descended from it can create further bcalTruthIncidentParticles. This keeps shower particles from getting appended to the list and making it confusing to interpret.
>> 
>> I am not sure nowadays who might be making use of that information, but it has a clear meaning and is potentially useful in Monte Carlo studies for computing efficiencies and adjusting matching windows, etc.
>> 
>> -Richard Jones
>> 
>> On Fri, Mar 4, 2016 at 7:58 AM, Mark Dalton <dalton at jlab.org <mailto:dalton at jlab.org>> wrote:
>> Hi guys,
>> 
>> Is anyone aware of what the intent of the  DBCALIncidentParticle  class was and whether it is being used for anything?
>> 
>> Best,
>> Mark Macrae Dalton
>> 
>> --
>> Staff Scientist, Jefferson Lab
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Dr. Zisis Papandreou
Professor of Physics, Ph.D., P.Phys.
---------------------------------------------------------
Department of Physics   
University of Regina	    
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Regina, SK  S4S 0A2	 CANADA

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