Hi Hans, I think you should be able to read of the plateau value of the acceptance and compare those in the old and new simulation. This is also relatively easy to calculate by hand. The 20% seems suspiciously much like the 2*1 cm fiducial cuts out of the D5 10 cm height (if memory serves me well). About the dead slat correction. I just looked up in my Ph.D. thesis and Djamel and I looked at all the runs used and then forced the slats that were dead in some runs (or had poor calibrations) to be dead in all data runs and simulation. A dead slat shows up as a band with smaller acceptance in the maps and you should be able to compare this with data, see e.g. page 81 in my thesis, even though I was too lazy as you can also see:-) Cheers, Peter On Wed, 2007-01-10 at 20:24 -0500, Flemming Videbaek wrote: > Hi > > This is indeed surpeising; but it could depend on whatever fiducial > cuts have been applied. Did you overwrite the old maps ? > The old code certainly had a problem in so far it did not include the > dead slats in tofw which is crucial for PID, but this effect > would in fact not lower the yeilds, so my gueass it has to do with > fiducial cuts. > On the FS part I have not tried the new banapp. It sounds we really > should compare new/old. I still have the old version around > and have generated maps, so this may be feasible. > I cc the answer to the list because others may have clues to this, and > or comments. > > Flemming > > -------------------------------------------- > Flemming Videbaek > Physics Department > Bldg 510-D > Brookhaven National Laboratory > Upton, NY11973 > > phone: 631-344-4106 > cell: 631-681-1596 > fax: 631-344-1334 > e-mail: videbaek @ bnl gov > ----- Original Message ----- > From: Hans Hjersing Dalsgaard > To: Flemming Videbaek > Sent: Wednesday, January 10, 2007 7:18 PM > Subject: Acceptance maps > > > Hi Flemming, > > After generating new MRS maps, my yields in the MRS dropped > some 20 % ! The maps I used before were generated half a year > ago or something like that....I must admit I was a little > surprised. I do not understand how the MRS maps apparently > changed so much in this brief time ? > > Furthermore, using the latest version of banapp, I am unable > to generate FS maps due to some bug in the error minimization. > The calculation gets stuck at "nan %" ...so far I have been > unable to track the bug. > > Do we have some up-to-date maps for the 62 GeV data somewhere > on rcas? Using these would rule out any error I might commit > in generating the maps.... > > Regards, > > Hans > _______________________________________________ > Brahms-dev-l mailing list > Brahms-dev-l_at_lists.bnl.gov > http://lists.bnl.gov/mailman/listinfo/brahms-dev-l -- Peter Christiansen Email: peter.christiansen_at_hep.lu.se Phone: (+46) 046-2227709 Address: Lund University Department of Physics Div. of Experimental High-Energy Physics Box 118 SE-221 00 Lund Sweden _______________________________________________ Brahms-dev-l mailing list Brahms-dev-l_at_lists.bnl.gov http://lists.bnl.gov/mailman/listinfo/brahms-dev-lReceived on Thu Jan 11 2007 - 09:18:16 EST
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