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    • Impact of longitudinally tilted beams on bpm performance at the advanced photon source

    N. S. Sereno,G. Decker,R. Lill,X. Sun,B-X Yang

    semanticscholar（2013）

    Cited 0|Views1
    Abstract
    It has been shown that cavity beam position monitors (BPMs) are sensitive not only to beam centroid position but also longitudinal beam tilt [1]. Button-style BPMs also should in principle be sensitive to beam tilt that may impact their performance when used to measure the beam centroid. For the APS upgrade project, beam stability at a level better than 0.5 micron (0.1 200 Hz) is required. Simplified models of the button geometry are used in the calculation and simulation. For the experiment, tilt oscillations were induced by kicking the beam vertically and letting it decohere [2]. Tilt oscillations were observed using a specially instrumented set of button-type BPM pickup electrodes. Experimental results are compared with calculation and simulations to quantify the impact of beam tilt on BPM centroid resolution performance.
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