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Accession Number
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DE2012-1045810
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Title
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4.2 GS/sec. Synchronized Vertical Excitation System for SPS Studies: Steps Toward Wideband Feedback.
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Publication Date
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2012
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Media Count
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3p
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Personal Author
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C. Rivetta I. Rivetta J. Olsen J. D. Fox O. Turgut S. Uemura
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Abstract
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A 4.2 GS/sec. beam excitation system with accelerator synchronization and power stages is described. The system is capable of playing unique samples (32 samples/bunch) for 15,000 turns on selected bunch(es) in the SPS in syn- chronism with the injection and acceleration cycle. The purpose of the system is to excite internal modes of single- bunch vertical motion, and study the bunch dynamics in the presence of developing Electron cloud or TMCI effects. The system includes a synchronized master oscillator, SPS timing functions, an FPGA based arbitrary waveform gen- erator, 4.2 GS/sec. D/A system and four 80W 20 -1000 MHz amplifiers driving a tapered stripline pickup/kicker. A software GUI allows specification of various modulation signals, selection of bunches and turns to excite, while a remote control interface allows simple control/monitoring of the RF power stages located in the tunnel. The success- ful use of this system for SPS MD measurements in 2011 is a vital proof-of-principle for wideband feedback using similar functions to correct the beam motion.
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Keywords
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Acceleration
Accelerators
Amplifiers
Clouds
Electrons
Excitation systems
Feedback
Modulation
Remote control
Specifications
Synchronization
Wave forms
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Source Agency
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Technical Information Center Oak Ridge Tennessee
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NTIS Subject Category
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46 - Physics
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Corporate Author
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Stanford Linear Accelerator Center, CA.
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Document Type
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Technical report
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Title Note
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N/A
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NTIS Issue Number
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1226
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Contract Number
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DE-AC02-76SF00515
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