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@ARTICLE{Krisch:53790,
      author       = {Krisch, A. D. and Leonova, M. A. and Morozov, V. S. and
                      Raymond, R. S. and Sivers, D. W. and Wong, V. K. and Gebel,
                      R. and Lehrach, A. and Lorentz, B. and Maier, R. and
                      Prasuhn, D. and Schnase, A. and Stockhorst, H. and
                      Hinterberger, F. and Ulbrich, K.},
      title        = {{U}nexpected enhancement and reduction of rf spin resonance
                      strength},
      journal      = {Physical review accelerators and beams},
      volume       = {9},
      number       = {5},
      issn         = {1098-4402},
      address      = {[S.l.] @},
      publisher    = {Soc.},
      reportid     = {PreJuSER-53790},
      pages        = {051001},
      year         = {2006},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {We recently analyzed all available data on spin-flipping
                      stored beams of polarized protons, electrons, and deuterons.
                      Fitting the modified Froissart-Stora equation to the
                      measured polarization data after crossing an rf-induced spin
                      resonance, we found 10-20-fold deviations from the
                      depolarizing resonance strength equations used for many
                      years. The polarization was typically manipulated by
                      linearly sweeping the frequency of an rf dipole or rf
                      solenoid through an rf-induced spin resonance; spin-flip
                      efficiencies of up to $99:9\%$ were obtained. The Lorentz
                      invariance of an rf dipole's transverse integral Bdl and the
                      weak energy dependence of its spin resonance strength E
                      together imply that even a small rf dipole should allow
                      efficient spin flipping in 100 GeV or even TeV storage
                      rings; thus, it is important to understand these large
                      deviations. Therefore, we recently studied the resonance
                      strength deviations experimentally by varying the size and
                      vertical betatron tune of a 2:1 GeV/c polarized proton beam
                      stored in COSY. We found no dependence of E on beam size,
                      but we did find almost 100-fold enhancements when the rf
                      spin resonance was near an intrinsic spin resonance.},
      keywords     = {p: storage ring (INSPIRE) / p: polarized beam (INSPIRE) /
                      spin: rotator (INSPIRE) / RF system: solenoid (INSPIRE) /
                      magnet: solenoid (INSPIRE) / bending magnet (INSPIRE) /
                      polarization: resonance (INSPIRE) / Juelich COSY PS
                      (INSPIRE)},
      cin          = {IKP-GG},
      ddc          = {530},
      cid          = {I:(DE-Juel1)VDB22},
      pnm          = {Physik der Hadronen und Kerne},
      pid          = {G:(DE-Juel1)FUEK413},
      shelfmark    = {Physics, Nuclear / Physics, Particles $\&$ Fields /
                      29.27.Bd / 29.27.Hj / 41.75.Ak / 99.10.Cd},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000239140700005},
      doi          = {10.1103/PhysRevSTAB.9.051001},
      url          = {https://juser.fz-juelich.de/record/53790},
}