Cornell University (CLASSE), Cornell Laboratory for Accelerator-Based Sciences and Education, Ithaca, New York, USA
We have recently constructed a shielded pickup in a quadrupole magnet for time-resolved detection of electron cloud. Cloud electrons pass into the detector through an array of small holes in the wall of the beam-pipe that shield the collecting electrode from the direct beam signal. There are two collectors, each aligned on a pole face: one near the longitudinal center of the quadrupole, the other in the fringe field. The signals from the collectors are recorded with a digital oscilloscope. We present a summary of the design, construction and commissioning of this device, as well as initial beam measurements. This work was performed at the Cornell Electron Storage Ring which has been reconfigured as a test accelerator (CesrTA) with positron or electron beam energies ranging from 2 GeV to 5 GeV.
