[Halld-offline] CORRECTION: MC beam sim rates normalization for commissioning

[Sean Dobbs]

Hi Richard,


>  I don't understand what you are saying here. The number 4.65 x 10^9
> tells how many hdgeant beam events you need to simulate in order to cover
> one second of commissioning beam. How that translates into the statement
> you made, which makes no reference to MC simulations, is not clear to me.
> Remember that most of these 4 billion photons (about 80%) hit the primary
> collimator and never make it to the GlueX target.
>

Right, sorry for being unclear.  I did mean that 4.65 x 10^9 hdgeant beam
events were needed to simulate one second of commissioning beam, given that
most of them hit the primary collimator.

Thanks for clearing up my other questions.

---Sean


-- 
Sean Dobbs
Department of Physics & Astronomy
Northwestern University
phone: 847-467-2826
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