Operation of the PEP Transverse Beam Feedback

Author

Olson, C.W. ; Paterson, J.M. ; Pellegrin, J.-L. ; Rees, J.R.

Author_Institution

Stanford Linear Accelerator Center Stanford University, Stanford, California 94305

Volume

28

Issue

3

fYear

1981

fDate

6/1/1981 12:00:00 AM

Firstpage

2296

Lastpage

2298

Abstract

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.

Keywords

Damping; Electrodes; Feedback loop; Frequency modulation; Hardware; Linear accelerators; Optical modulation; Particle beams; Storage rings; Wideband;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/TNS.1981.4331668

Filename

4331668