<div dir="ltr">Mark,<div><br></div><div>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.</div><div><br></div><div>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.</div><div><br></div><div>-Richard Jones</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Mar 4, 2016 at 7:58 AM, Mark Dalton <span dir="ltr"><<a href="mailto:dalton@jlab.org" target="_blank">dalton@jlab.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi guys,<br>
<br>
Is anyone aware of what the intent of the DBCALIncidentParticle class was and whether it is being used for anything?<br>
<br>
Best,<br>
Mark Macrae Dalton<br>
<br>
--<br>
Staff Scientist, Jefferson Lab<br>
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