The electronics and data acquisition system for the wire imaging synchrotron radiation detector at the SLC

The Stanford Large Collider (SLC), located at the Stanford Linear Accelerator Center, collides electrons and positrons produced in the linear accelerator pulse by pulse. The energy of each beam is determined by measuring the angle of deflection of the beam in the SLC extraction lines. Each extraction line consists of two bending magnets that produce synchrotron radiation, and a spectrometer analyzing magnet that deflects the beam. The synchrotron light is detected by using the emission of electrons produced by Compton scattering off Cu-Be wires. The electronics used to detect the approximately 180 fC of charge on the wire is described. The performance of the system, including the equivalent noise charge, crosstalk stability, and reliability are discussed. >