From: Claus O. E. Jorgensen (ekman@nbi.dk)
Date: Thu Sep 04 2003 - 08:39:35 EDT
Hi, As you may know some of rich pedestals in the last run were very wide. This was due to a ground loop and the drift in the adc signals were parallel for all tubes. I've added a flag in the PedCal module and in the Rdo module to correct for this. The basic idea is to calculate the average deviation for tubes affected by the ground loop. This deviation is then subtracted the individual tubes and a reasonable pedestal width is obtained. Tubes that are believed to be affected is marked by adding 1000 to the pedestal width in the db (this is done in the ped cal module). This is then used in the rdo module to calculate the (average) adc drift. I'll make the rich pedestal calibrations for the complete run and make sure that Bjorn is using the right rdo module setup for the next reconstruction. The changes are committed to brat, which is now tagged 2-10-8. Cheers, Claus +------------------------------------------------------------+ | Claus E. Jørgensen Phone : (+45) 33 32 49 49 | | Cand. Scient. (M. Sc.) Cell : (+45) 27 29 49 49 | | Office : (+45) 35 32 53 51 | | Niels Bohr Institute, Ta-2, Fax : (+45) 35 32 50 16 | | Blegdamsvej 17, DK-2100, E-mail : ekman@nbi.dk | | University of Copenhagen Home : www.nbi.dk/~ekman/ | +------------------------------------------------------------+
This archive was generated by hypermail 2.1.5 : Thu Sep 04 2003 - 08:40:27 EDT