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Thanks Sho, I changed the default value of pePerMeV to 32.8 to go with the current detector (although there is another number 112.6 in the note, not sure which to use). So now Test Run will have to override that back to "2" in the steering file. -Nathan On Mar 24, 2015, at 7:38 PM, Sho Uemura <[log in to unmask]> wrote: > The formula for use2014Gain=false (like all the formulas for use2014Gain=false) was written for the test run. The 2.0 default value of the pePerMeV constant is what was used for the test run MC; you can change it in the steering file, or change the default in FADCEcalReadoutDriver if you want. > > The use2014Gain=true formula (ECalUtils.lightYield * ECalUtils.quantumEff * ECalUtils.surfRatio) is the expected value for the new APDs. I would rather not see this formula used for use2014Gain=false, since that hard-codes this value into the simulation. This means we can't do test run MC any more (not important, maybe), and means that you will need to change the code again if at some point you get a better measurement of the light yield from analysis. But up to you. > > On Tue, 24 Mar 2015, Nathan Baltzell wrote: > >> That would result in that noise term being a factor of 8 lower, much more reasonable >> and the same as one of the numbers in the note (32.8 p.e./MeV). There is also 112.6 >> p.e./MeV in the note. >> >> >> >> >> On Mar 24, 2015, at 11:47, Gabriel CHARLES <[log in to unmask]> wrote: >> >>> What about replacing it by ECalUtils.lightYield * ECalUtils.quantumEff * ECalUtils.surfRatio as used when the condition use2014Gain is true? >>> >>> This modification may have been forgotten. Sho can probably tell more about it. >>> >>> -- >>> Gabriel CHARLES >>> Institut de Physique Nucléaire d'Orsay >>> >>> Le 2015-03-24 16:38, Nathan Baltzell a écrit : >>>> Hi Everyone, >>>> Does anyone know about the noise calculation at line 454 in >>>> org.hps.readout.ecal.FADCEcalReadoutDriver? >>>> Specifically, this pePerMeV, which defaults to 2. What we think we?re >>>> finding is that this pePerMeV term is >>>> completely dominating the smearing and is much larger than the numbers >>>> in HPS-NOTE-2014-002. >>>> - Holly & Nathan >>>> ######################################################################## >>>> Use REPLY-ALL to reply to list >>>> To unsubscribe from the HPS-SOFTWARE list, click the following link: >>>> https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=HPS-SOFTWARE&A=1 >>> >> >> ######################################################################## >> Use REPLY-ALL to reply to list >> >> To unsubscribe from the HPS-SOFTWARE list, click the following link: >> https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=HPS-SOFTWARE&A=1 >> > > ######################################################################## > Use REPLY-ALL to reply to list > > To unsubscribe from the HPS-SOFTWARE list, click the following link: > https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=HPS-SOFTWARE&A=1 ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the HPS-SOFTWARE list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=HPS-SOFTWARE&A=1