NDLI: Rapidly Tuned Buncher Structure for the los Alamos Proton Storage Ring (PSR)

Content Provider	IEEE Xplore Digital Library
Author	Earley, L. M. Lawrence, G. P. Potter, J. M.
Copyright Year	1963
Abstract	In the PSR's short-bunch operating mode, accumulated beam currents are intense and change rapidly. The resonant frequency of the 503.125-MHz buncher used in this mode must be rapidly adjusted through a 100-kHz range to maintain the correct 90° phase relation between cavity voltage and beam current. Modulation rates are up to 3 kHz/¿s. Each structure consists of two side-coupled buncher cavities, resonantly coupled to a ferrite-loaded tuner cavity. The needed frequency change ¿f in the buncher cells is produced by a 50 × ¿f change in the tuner, accomplished by varying a magnetic field applied to the ferrite perpendicular to the rf magnetic field. Fast modulation of this bias is provided by a low-inductance ferritecore magnet excited by a special function generator. The resonantly coupled multicavity structure configuration allows buncher and tuner cells to be independently optimized for their specific functions. This paper describes the buncher design, ferrite selection, and test results from a prototype ferrite-loaded tuner cavity. The tests have demonstrated the tuning scheme's feasibility, showing that the necessary 5-MHz range can be attained with only 12% of the tuner cell filled with ferrite, and that losses in the ferrite are small throughout this frequency interval.
Sponsorship	IEEE Nuclear and Plasma Sciences Society Computer Applications in Nuclear and Plasma Sciences (CANPS) Lawrence Berkeley Lab. Lawrence Livermore Nat. Lab. APS College of William and Mary Continuous Electron Beam Accelerator Facility NASA Defence Nuclear Agency Sandia National Laboratories Jet Propulsion Laboratory Brookhaven Nat. Lab. Lawrence Livermore Nat. Lab IEEE/NPPS Radiat. Effects Committee Defence Nuclear Agency/DoD Sandia National Laboratories/DOE Jet Propulsion Laboratory/NASA Phillips Lab./DoD
Starting Page	3511
Ending Page	3513
Page Count	3
File Size	578501
File Format	PDF
ISSN	00189499
Volume Number	30
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1983-08-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Protons Storage rings Tuners Ferrites Magnetic resonance Magnetic fields Testing Resonant frequency Voltage Magnetic modulators
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Electrical and Electronic Engineering Nuclear Energy and Engineering

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A Resonantly Coupled, Ferrite-Tuned Buncher-Cavity System for the Los Alamos Proton Storage Ring

Rapidly Tuned Buncher Structure for the Los Alamos Proton Storage Ring (PSR)

Time-Jitter Reduction on the RF Buncher Signal for the los Alamos Proton Storage Ring (PSR)

Calculations and observations of the longitudinal instability caused by the ferrite inductors at the Los Alamos Proton Storage Ring (PSR)

Time-Jitter Reduction of the RF Buncher Signal for the Los Alamos Proton Storage Ring (PSR)

Calculations and observations of the longitudinal instability caused by the ferrite inductors at the Los Alamos proton storage ring (PSR)

Sequential Bunch Extractions in the los Alamos PSR

The los Alamos Proton Storage Ring Fast-Extraction Kicker System

The los Alamos Proton Storage Ring (PSR) Injection Deflector System

Rapidly Tuned Buncher Structure for the los Alamos Proton Storage Ring (PSR)

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