Hi Konstantin et al, On Sun, 19 Mar 2000 22:53:22 -0500 Konstantin Olchanski <olchansk@ux1.phy.bnl.gov> wrote: > In the mean time, I am seeking information on how SI is handled in BRAT, > in particular what channel numbering it expects. AFAIK, there is no real handling of the Silicon strips as of yet in BRAT. This Friday, I did commit a "BrDigitizeMultSi" class to BRAT. The assumtion in that class is, that all the output from the 7(signals*strips/wafer) * 6(wafers/ladder) * 4(ladders) = 168(signals) are put into one array, where the array index is the identifier. The numbering is assumed to be: Starting farthest from FS, and at the top most ladder, number the strips 0-41. Then, again starting farthest from FS, go to the veritcal oriented ladder, farthest from MRS, and number these 42-83. The third ladder is the bottom-most, farthest from MRS, and has the numbers 84-125, and finally the last ladder contains the strips 126-167. This mapping may be totally inappropiate. In fact, I could envision a mapping, were, starting farthest from the FS, you go around in circles. This would emphazie the different pseudo-rapdity bins, rather then the physical arragement in ladders. Anyway that's my humble opinion. The reason why I didn't adopt these scheme in "BrDigitizeMultSi", was because I though you already had made a mapping, and it was the one I used in that class. By the way, does anybody know where I can find the geomtry of MultSi and MultTiles? What I want to know is the global position with respect to nominel vertex, and dimensions of the strips and tiles. You see, I want to calculate the pseudo-rapidty bin corresponding to each strip/tile. The only places to look, I can think of, is the web page, where I found nothing I'm afraid, or in the GBRAHMS code, which I'd rather not. Thanks, Christian ----------------------------------------------------------- Holm Christensen Phone: (+45) 35 35 96 91 Sankt Hansgade 23, 1. th. Office: (+45) 353 25 305 DK-2200 Copenhagen N Web: www.nbi.dk/~cholm Denmark Email: cholm@nbi.dk
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