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Stats update

Stats update. Was asked to provide comparison between toy mc and g4mice at two points along z (middle of first and third absorbers) 10,000 events, step VI Can add more points etc later

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Stats update

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  1. Stats update • Was asked to provide comparison between toy mc and g4mice at two points along z (middle of first and third absorbers) • 10,000 events, step VI • Can add more points etc later • Toy MC has multiple scattering and energy lossbut does not have full range of G4MICE features eg proper transport, rf etc • Further details about Toy MC in previous talk (http://mice.iit.edu/pc/pc383/pc383.html)

  2. Middle of first absorber

  3. Middle of third absorber

  4. Summary • Toy MC observes ~ 12.1% cooling for 6pi beam, between middle of first absorber and middle of third • G4MICE has 9.5% cooling between two trackers (cutting if particle doesn’t make downstream tracker), 6.2% between same points at absorbers (same cuts) • We have shown in previous discussions about Statistics that the error is proportional to 1/Sqrt(Events) • Will produce comparison plots of that constant of proportionality for next meeting, comparing estimates from G4MICE Grid simulations, Toy MC predictions, and John Cobb’s theoretical studies • But the conclusion will be that we need O(10^5) muons to measure fractional change in emittance to an accuracy of 0.1% for most cooling beams

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