Experimental verification of predicted oscillations near a spin resonance

V. S. Morozov, A. W. Chao, A. D. Krisch, M. A. Leonova, R. S. Raymond, D. W. Sivers, V. K. Wong, A. Ganshvili, R. Gebel, A. Lehrach, B. Lorentz, R. Maier, D. Prasuhn, H. Stockhorst, D. Welsch, F. Hinterberger, K. Ulbrich, A. Schnase, E. J. Stephenson, N. P.M. BrantjesC. J.G. Onderwater, M. Da Silva

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The Chao matrix formalism allows analytic calculations of a beam's polarization behavior inside a spin resonance. We recently tested its prediction of polarization oscillations occurring in a stored beam of polarized particles near a spin resonance. Using a 1.85 GeV/c polarized deuteron beam stored in COSY, we swept a new rf solenoid's frequency rather rapidly through 400 Hz during 100 ms, while varying the distance between the sweep's end frequency and the central frequency of an rf-induced spin resonance. Our measurements of the deuteron's polarization for sweeps ending near and inside the resonance agree with the Chao formalism's predicted oscillations.

Original languageEnglish
Title of host publicationSpin Physics
Subtitle of host publication18th International Spin Physics Symposium
EditorsXiaochao Zheng, Yelena Prok, Matt Poelker, Donald G. Crabb, Simonetta Liuti, Donal B. Day
PublisherAmerican Institute of Physics Inc.
Pages801-804
Number of pages4
ISBN (Print)9780735406865
DOIs
StatePublished - Aug 4 2009
Externally publishedYes
Event18th International Spin Physics Symposium 2008 - Charlottesville, United States
Duration: Oct 6 2008Oct 11 2008

Publication series

NameAIP Conference Proceedings
Volume1149
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference18th International Spin Physics Symposium 2008
Country/TerritoryUnited States
CityCharlottesville
Period10/6/0810/11/08

Funding

We thank the COSY staff for the successful operation of COSY with its injector cyclotron and polarized ion source. This research was supported by grants from the German BMBF Science Ministry, its JCHP-FFE program at COSY, the Netherlands NWO, the U.S. NSF, and the Helmholtz Association through funds provided to the virtual institute "Spin and strong QCD" (VH-VI-231).

FundersFunder number
BMBF Science Ministry
U.S. NSF
Nederlandse Organisatie voor Wetenschappelijk Onderzoek
Helmholtz AssociationVH-VI-231

    Keywords

    • Chao matrix formalism
    • Spin dynamics
    • Spin resonance

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