Hi, I've modified a number of si and tile classes (BrSiCalibration, BrTileCalibration, BrMultRdo, BrMultRdoModule) to add event-by-event calculations of dNdEta for each si and tile ring. I also added a calculation of the HIJING weighted average pseudorapdity for each ring. We were already calculating the number of "primary" particles hitting each detector element based on HIJING simulations that relate these particle multiplicites to the observed energy deposited in each si and tile element. I have now added calibrations that relate the particle multiplicites to a dNdEta value based on the measured vertex position. To obtain the calibrations I position a simulated vertex between -46 cm and +46 cm, in 2 cm steps, and at each position did a "throw" of HIJING 0-2 fm primary events (no CASCADE...). Each particle was checked to see if it hit on the si or tile detectors. I also kept track of the total number of particles within the pseudorapity range covered by each detector. This procedure allows for a simple geometric efficiency calculation. Although the dNdEta and <eta> values are calculated internally for each si and tile detector elements, I am only placing the average value obtained for each si and tile "ring" in the BrMultRdo data structure. (42 values for the Si, 8 for the tiles). I have retagged brat as 2.1.40 and I have bumped the BrMultRdo classdef to 2. Regards, Steve
This archive was generated by hypermail 2b30 : Sat Nov 24 2001 - 11:13:46 EST