Achieving 99.9% proton spin-flip efficiency at higher energy with a small rf dipole

M. A. Leonova; A. D. Krisch; V. S. Morozov; R. S. Raymond; V. K. Wong; R. Gebel; A. Lehrach; B. Lorentz; R. Maier; D. Prasuhn; A. Schnase; H. Stockhorst; D. Eversheim; F. Hinterberger; K. Ulbrich

doi:10.1103/PhysRevLett.93.224801

Achieving 99.9% proton spin-flip efficiency at higher energy with a small rf dipole

M. A. Leonova, A. D. Krisch, V. S. Morozov, R. S. Raymond, V. K. Wong, R. Gebel, A. Lehrach, B. Lorentz, R. Maier, D. Prasuhn, A. Schnase, H. Stockhorst, D. Eversheim, F. Hinterberger, K. Ulbrich

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25 Scopus citations

Abstract

The use of a small rf dipole to achieve 99.9% proton spin-flip efficiency at higher energy was discussed. For the study, rf dipole's frequency was swept through an rf-induced spin resonance to flip the beam's polarization direction. At the rf dipole's maximum strength and optimum frequency range and ramp time, a spin-flip efficiency of 99.92±0.04% was measured. It was suggested that an rf dipole's ∫Bdl is Lorentz invariant and its resonance strength becomes almost energy independent at high energy.

Original language	English
Article number	224801
Journal	Physical Review Letters
Volume	93
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevLett.93.224801
State	Published - Nov 29 2004
Externally published	Yes

Funding

We would like to thank the entire COSY staff for the successful operation of COSY, its injector cyclotron and its polarized ion source. We also thank U. Bechstedt, B. B. Blinov, A. W. Chao, E. D. Courant, Ya. S. Derbenev, H. Huang, A. M. T. Lin, W. Lorenzon, C. C. Peters, R. A. Phelps, H. Rohdjeß, T. Roser, H. Sato, W. Scobel, D. W. Sivers, K. Yonehara, and others for their earlier help and advice. This research was supported by grants from the German BMBF Science Ministry.

Funders	Funder number
Bundesministerium für Bildung und Forschung

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10.1103/PhysRevLett.93.224801

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Leonova, M. A., Krisch, A. D., Morozov, V. S., Raymond, R. S., Wong, V. K., Gebel, R., Lehrach, A., Lorentz, B., Maier, R., Prasuhn, D., Schnase, A., Stockhorst, H., Eversheim, D., Hinterberger, F., & Ulbrich, K. (2004). Achieving 99.9% proton spin-flip efficiency at higher energy with a small rf dipole. Physical Review Letters, 93(22), Article 224801. https://doi.org/10.1103/PhysRevLett.93.224801

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abstract = "The use of a small rf dipole to achieve 99.9% proton spin-flip efficiency at higher energy was discussed. For the study, rf dipole's frequency was swept through an rf-induced spin resonance to flip the beam's polarization direction. At the rf dipole's maximum strength and optimum frequency range and ramp time, a spin-flip efficiency of 99.92±0.04% was measured. It was suggested that an rf dipole's ∫Bdl is Lorentz invariant and its resonance strength becomes almost energy independent at high energy.",

author = "Leonova, {M. A.} and Krisch, {A. D.} and Morozov, {V. S.} and Raymond, {R. S.} and Wong, {V. K.} and R. Gebel and A. Lehrach and B. Lorentz and R. Maier and D. Prasuhn and A. Schnase and H. Stockhorst and D. Eversheim and F. Hinterberger and K. Ulbrich",

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Leonova, MA, Krisch, AD, Morozov, VS, Raymond, RS, Wong, VK, Gebel, R, Lehrach, A, Lorentz, B, Maier, R, Prasuhn, D, Schnase, A, Stockhorst, H, Eversheim, D, Hinterberger, F & Ulbrich, K 2004, 'Achieving 99.9% proton spin-flip efficiency at higher energy with a small rf dipole', Physical Review Letters, vol. 93, no. 22, 224801. https://doi.org/10.1103/PhysRevLett.93.224801

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T1 - Achieving 99.9% proton spin-flip efficiency at higher energy with a small rf dipole

AU - Leonova, M. A.

AU - Krisch, A. D.

AU - Morozov, V. S.

AU - Raymond, R. S.

AU - Wong, V. K.

AU - Gebel, R.

AU - Lehrach, A.

AU - Lorentz, B.

AU - Maier, R.

AU - Prasuhn, D.

AU - Schnase, A.

AU - Stockhorst, H.

AU - Eversheim, D.

AU - Hinterberger, F.

AU - Ulbrich, K.

PY - 2004/11/29

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AB - The use of a small rf dipole to achieve 99.9% proton spin-flip efficiency at higher energy was discussed. For the study, rf dipole's frequency was swept through an rf-induced spin resonance to flip the beam's polarization direction. At the rf dipole's maximum strength and optimum frequency range and ramp time, a spin-flip efficiency of 99.92±0.04% was measured. It was suggested that an rf dipole's ∫Bdl is Lorentz invariant and its resonance strength becomes almost energy independent at high energy.

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Achieving 99.9% proton spin-flip efficiency at higher energy with a small rf dipole

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