Polarization reversal of stored proton beams in the Indiana Cooler

Journal Article · Mon Jan 01 04:00:00 EST 1996 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1146565· OSTI ID:434506

von Przewoski, B; Dezarn, W A; Doskow, J; Hardie, J G; Meyer, H O; Pollock, R E; Rinckel, T; Sperisen, F ^[1]; Haeberli, W; Lorentz, B; Rathmann, F; Wise, T ^[2]; Pancella, P V ^[3]

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1. Indiana University Cyclotron Facility, Bloomington, Indiana 47405 (United States)
2. University of Wisconsin--Madison, Madison, Wisconsin 53706 (United States)
3. Western Michigan University, Kalamazoo, Michigan 49008 (United States)

A spin flipper of reliable and robust long-term operation was developed and has been used successfully at the Indiana University Cooler Storage Ring. To reverse the polarization of the stored beam, the frequency of a rf solenoid is swept adiabatically across a depolarizing resonance frequency. Depolarizing sidebands to the resonance are eliminated by shorting out the ring{close_quote}s bunching rf cavity prior to the frequency sweep. With the spin flipper it is no longer necessary to dump the stored beam and to refill the ring with protons of opposite spin state. Rather, beam accumulation continues without reversing the spin at injection, and instead the polarization of the stored beam is flipped periodically. Thus the luminosity is significantly increased when the flipper is used. {copyright} {ital 1996 American Institute of Physics.}

• OSTI ID: 434506
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 1 Vol. 67; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
BEAM COOLING
BEAM LUMINOSITY
DEPOLARIZATION
POLARIZED BEAMS
PROTON BEAMS
SPIN FLIP
STORAGE RINGS