Spin Flipping through an Intrinsic Depolarizing Resonance by Strengthening It

Journal Article · Thu Aug 01 00:00:00 EDT 1996 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.77.1763· OSTI ID:388956

Crandell, D A; Anferov, V A; Blinov, B B; Caussyn, D D; Derbenev, Y S; Hu, S; Koutin, S V; Krisch, A D; Liu, T J; Phelps, R A; Ratner, L G; Wong, V K ^[1]; Chu, C M; Lee, S Y; Rinckel, T; Schwandt, P; Sperisen, F; Stephenson, E J; von Przewoski, B ^[2]; Berglund, M ^[3]

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1. Randall Laboratory of Physics, University of Michigan, Ann Arbor, Michigan 48109-1120 (United States)
2. Indiana University Cyclotron Facility, Bloomington, Indiana 47408-0768 (United States)
3. Royal Institute of Technology, Stockholm, (Sweden) S-10044

We recently accelerated a polarized proton beam from 95 to 380MeV through both the {ital G}{gamma}=2 imperfection depolarizing resonance and the {ital G}{gamma}=7{minus}{nu}{sub {ital y}} 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 500ns to increase the beam{close_quote}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. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 388956
• Journal Information: Physical Review Letters, Vol. 77, Issue 9; Other Information: PBD: Aug 1996
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
43 PARTICLE ACCELERATORS
SPIN FLIP
RESONANCE
DEPOLARIZATION
PROTON BEAMS
ACCELERATION
POLARIZED BEAMS
MEV RANGE 100-1000
MAGNETS
QUADRUPOLES
MAGNETIC FIELDS
OSCILLATIONS
ACCELERATORS