Title :
PEP-II bunch-by-bunch current monitor
Author :
Chin, M.J. ; Hinkson, J.A.
Author_Institution :
Lawrence Berkeley Nat. Lab., California Univ., Berkeley, CA, USA
Abstract :
PEP-II is an asymmetric B-Factory that will have 2200 meter rings storing 9 GeV electrons and 3.1 GeV positrons, each with as many as 3492 beam bunches. To minimize beam-beam instabilities it is important to have equal bunch charge in each ring. This is accomplished by measuring the relative bunch charge and controlling injection timing and intensity. Because there may be a variety of bunch patterns, the bunch monitors are designed to measure beam in every possible bucket. Results of bunch amplitude measurements with resolution of >9 bits are available to the injection control system at rates up to 66 Hz. The bunch monitor hardware consists of beam pickups, front end filter/combiners, 1428 MHz down-converters, 1 GHz video detectors, and two VXI systems. In this paper we report on the bunch monitor design
Keywords :
accelerator control systems; colliding beam accelerators; electron accelerators; particle beam bunching; particle beam diagnostics; particle beam injection; particle beam stability; storage rings; 1 GHz; 1428 MHz; 2200 m; 3.1 GeV; 9 GeV; PEP-II bunch-by-bunch current monitor; VXI systems; asymmetric B-Factory; beam bunches; beam pickups; beam-beam instabilities; bunch amplitude measurements; downconverters; electron storage ring; front end filter/combiners; injection control system; injection intensity; injection timing; positrons; relative bunch charge; video detectors; Bandwidth; Coaxial cables; Control systems; Electron beams; Filters; Laboratories; Monitoring; Pulse amplifiers; RF signals; Radio frequency;
Conference_Titel :
Particle Accelerator Conference, 1997. Proceedings of the 1997
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-4376-X
DOI :
10.1109/PAC.1997.751167
