Spin flipping a stored polarized proton beam

Journal Article · Mon Nov 21 04:00:00 EST 1994 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.73.2857· OSTI ID:6920102

Caussyn, D D; Derbenev, Y S; Ellison, T J.P.; Lee, S Y; Rinckel, T; Schwandt, P; Sperisen, F; Stephenson, E J; von Przewoski, B ^[1]; Blinov, B B; Chu, C M; Courant, E D; Crandell, D A; Kaufman, W A; Krisch, A D; Nurushev, T S; Phelps, R A; Ratner, L G; Wong, V K ^[2]; Ohmori, C ^[3]

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1. Indiana University Cyclotron Facility, Bloomington, Indiana 47408-0768 (United States)
2. Randall Laboratory of Physics, University of Michigan, Ann Arbor, Michigan 48109-1120 (United States)
3. Institute for Nuclear Study, University of Tokyo, Tanashi, Tokyo 188 (Japan)

We recently studied the spin flipping of a vertically polarized, stored 139-MeV proton beam. To flip the spin, we induced an rf depolarizing resonance by sweeping our rf solenoid magnet's frequency through the resonance frequency. With multiple spin flips, we found a polarization loss of 0.0000[plus minus]0.0005 per spin flip under the best conditions; this loss increased significantly for small changes in the conditions. Minimizing the depolarization during each spin flip is especially important because frequent spin flipping could significantly reduce the systematic errors in stored polarized-beam experiments.

• OSTI ID: 6920102
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 73:21; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430200* -- Particle Accelerators-- Beam Dynamics
Field Calculations
& Ion Optics
BEAMS
ENERGY RANGE
ERRORS
MEV RANGE
MEV RANGE 100-1000
NUCLEON BEAMS
PARTICLE BEAMS
POLARIZED BEAMS
PROTON BEAMS
RESONANCE
RF SYSTEMS
SPIN FLIP
STORAGE RINGS