corner
corner
APS » Journals » Phys. Rev. Lett. » Volume 77 » Issue 9
< Previous Article | Next Article >

Phys. Rev. Lett. 77, 1763–1765 (1996)

Spin Flipping through an Intrinsic Depolarizing Resonance by Strengthening It

Download: PDF (86 kB) Buy this article Export: BibTeX or EndNote (RIS)

D. A. Crandell, V. A. Anferov, B. B. Blinov, D. D. Caussyn*, Ya. S. Derbenev†, S -Q. Hu, S. V. Koutin‡, A. D. Krisch, T. J. Liu, R. A. Phelps, L. G. Ratner, and V. K. Wong
Randall Laboratory of Physics, University of Michigan, Ann Arbor, Michigan 48109-1120

C. M. Chu, S. Y. Lee, T. Rinckel, P. Schwandt, F. Sperisen, E. J. Stephenson, and B. von Przewoski
Indiana University Cyclotron Facility, Bloomington, Indiana 47408-0768

M. Berglund
Royal Institute of Technology, Stockholm, Sweden S-10044

Received 2 May 1996; published in the issue dated 26 August 1996

We recently accelerated a polarized proton beam from 95 to 380 MeV through both the Gγ=2 imperfection depolarizing resonance and the Gγ=7-νy intrinsic depolarizing resonance. The imperfection resonance flipped the spin, while the intrinsic resonance initially caused partial depolarization. We then pulsed a vertical kicker magnet for about 500 ns to increase the beam's vertical betatron amplitude; this made the intrinsic resonance much stronger. By varying the strength and start time of the kicker, we observed a sharp spin flip due to the now very strong intrinsic depolarizing resonance.

© 1996 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.77.1763
DOI:
10.1103/PhysRevLett.77.1763
PACS:
41.75.Ak, 29.27.Bd, 29.27.Hj

*Present address: Florida State University, Nuclear Research Building, Tallahassee, FL 32306.

†Present address: Fermilab, Batavia, IL 60510.

‡Also at Moscow State University, Moscow, Russia RU-117234.

 
< Previous Article | Next Article >