Short answer: T2 rows 13 and 14 *are* partially instrumented. Long answer: Look at the TPC map files created by the TPC pedestals program in pii3:/opus/home/daq/tpcpedestals/*.map (4 files per run- one per TPC). The maps show each pad with a tag: o - good pad, . - blank pad (uninstrumented or unmapped in the padmap), P - bad or no pedestal, do not use these pads, T and W - wide pedestals, usually okey to use. For example, inspection of /opus/home/daq/tpcpedestals/run002466tpc2pedestals.map shows that pads 13 and 14 have rows 80 through 95 instrumented. Note: these maps should be in the database and they should be automatically used by the tpc reconstruction code. K.O. On Wed, Oct 18, 2000 at 05:18:09PM +0200, Peter H. L. Christiansen wrote: > Dear All, > We have been looking a bit at the TPCs, and have found some odd > behaviour. According to the DetectorParameters.txt file, T2 should only > have rows 1,2 5,6 9,10 15,16 instrumented. We made (well, Peter made it, > but I looked at it!) a plot of the number of sequences in each pad (summed > over roughly 15K events, from run 2535, requiring trigger 6) The number > of sequences is shown in the eps file by the color (the more red, the more > counts) and is displayed in a 2d 'pad map' of T2. One notes that there > are a few noisy blocks of 16 pads, as well as some that do not show up. > The most concerning is that there seems to be card placed on rows 13 and > 14, which disagrees with the info we have (i.e. DetectorParameters.txt) > This brings us to the question, which can be answered (presumably) by > a visual inspection of T2: which pads and rows are instrumented? > If there is no card reading out pads 80-96 on rows 13 and 14, does this > imply a problem with the unpacking of the data, or with the original pad > map? Or another (set of) problems altogether? > > Cheers, > Peter and Ian. > > :-) --------------------------------- )-: > |Peter H L Christiansen aka PAN @ NBI | > |EMAIL : pchristi@nbi.dk | > |OFFICE : Tb1 @ NBI | > |PHONE : 353 25269 <- New!! | > |SNAIL : Sdr. Fasanvej 14 ST 2000 F | > |PHONE : 38 872042 | > :-D --------------------------------- \-: -- Konstantin Olchanski Physics Department, Brookhaven National Laboratory, Long Island, New York olchansk@bnl.gov
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