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Operation of the PEP transverse beam feedback

Conference ·
OSTI ID:6505377
The PEP Storage Ring has been equipped with a wide band beam feedback system capable of damping the vertical and horizontal motion of six bunches. The oscillation detection is done at a symmetry point on the Storage Ring and feedback is applied at the same location one orbital period later. The signal is synchronously gated and the system appears as twelve independent feedback loops, operating on the two coordinates of each of the six bunches. Two beam deflection electrodes are driven each by a low-Q push-pull amplifier which is tuned at the 72nd harmonic of the revolution frequency and suppressed-carrier modulation is generated by a sequence of the detected bunch oscillations. The design parameters are reviewed as well as the salient features of the hardware, and the impact of this system on the machine operation is evaluated in the light of experimental results.
Research Organization:
Stanford Linear Accelerator Center, CA (USA)
DOE Contract Number:
AC03-76SF00515
OSTI ID:
6505377
Report Number(s):
SLAC-PUB-2690; CONF-810314-153; PEP-NOTE-348
Country of Publication:
United States
Language:
English

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