Author/Authors :
Abele، نويسنده , , J. and Berkovitz، نويسنده , , J. and Boehm، نويسنده , , J. and Brandin، نويسنده , , A. and Gushin، نويسنده , , E. and Harper، نويسنده , , G. and Lebedev، نويسنده , , A. and Love، نويسنده , , W.A. and Ridiger، نويسنده , , A. and Strikhanov، نويسنده , , M. and Weidenbach، نويسنده , , J and Wells، نويسنده , , R. and Wolf، نويسنده , , J. and Wirth، نويسنده , , J. and Wieman، نويسنده , , H.H.، نويسنده ,
Abstract :
The Time Projection Chamber (TPC) is the core tracking detector for the STAR experiment at RHIC. To determine spatial distortions, calibrate and monitor the TPC, a laser calibration system has been built. We developed a novel design to produce ∼500 thin laser beams simulating straight particle tracks in the TPC volume. The new approach is significantly simpler than the traditional ones, and provides a higher TPC coverage at a reduced cost. During RHIC 2000 and 2001 runs the laser system was used to monitor the TPC performance and measure drift velocity with ∼0.02% accuracy. Additional runs were recorded with and without magnetic field to check E×B corrections.
Keywords :
Detectors , Laser , Time projection chamber , Heavy ions , Calibration
