Spurrekonstruktion in der Hexagonal-Driftkammer am Experiment COSY-11

The experimental facility COSY-11 at the cooler synchrotron and storage ring COSY at the Research Center Jülich investigates the production of Small width mesons in the proton-proton- and proton-deuteron-interaction close to threshold . At COSY-11, the trajectories of positively charged ejectiles are measured by means of two planar drift chamber systems . In summer 2000, a drift chamber wich hexagonal cells was added to the COSY-11 setup. Consequently, the acceptance for short-living, positively charged mesons like pions and kaons is increased . The trajectories in the hexagonal chamber can be determined with the new track reconstruction Software in three dimensions . With the data of the COSY-11 beamtime in March 2001 a calibration was performed. The position resolution, determined as the Standard deviation of the experimental data, amounts to 450 /Im