Narrow Spin Resonance Width and Spin Flip with an rf-Bunched Deuteron Beam

Journal Article · Fri Oct 02 00:00:00 EDT 2009 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.103.144801· OSTI ID:21370719

Morozov, V S; Chao, A W; Krisch, A D; Leonova, M A; Raymond, R S; Sivers, D W; Wong, V K ^[1]; Kondratenko, A M ^[2]

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1. Spin Physics Center, University of Michigan, Ann Arbor, Michigan 48109-1040 (United States)
2. GOO Zaryad, Russkaya St. 41, Novosibirsk, 630058 (Russian Federation)

We used an rf solenoid to study the widths of rf spin resonances with both bunched and unbunched beams of 1.85 GeV/c polarized deuterons stored in the COSY synchrotron. With the unbunched beam at different fixed rf-solenoid frequencies, we observed only partial depolarization near the resonance. However, the bunched beam's polarization was almost fully flipped; moreover, its resonance was much narrower. We then used Chao's recent equations to explain this behavior and to calculate the polarization's dependence on various rf-solenoid and beam parameters. Our data and calculations indicate that a bunched deuteron beam's polarization can behave as if the beam has zero momentum spread.

• OSTI ID: 21370719
• Journal Information: Physical Review Letters, Vol. 103, Issue 14; Other Information: DOI: 10.1103/PhysRevLett.103.144801; (c) 2009 The American Physical Society; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
43 PARTICLE ACCELERATORS
BEAM BUNCHING
COSY STORAGE RING
DEPOLARIZATION
DEUTERON BEAMS
DEUTERONS
EQUATIONS
GEV RANGE 01-10
POLARIZATION
RESONANCE
SOLENOIDS
SPIN
SPIN FLIP
ACCELERATORS
ANGULAR MOMENTUM
BEAM DYNAMICS
BEAMS
CHARGED PARTICLES
CYCLIC ACCELERATORS
DYNAMICS
ELECTRIC COILS
ELECTRICAL EQUIPMENT
ENERGY RANGE
EQUIPMENT
GEV RANGE
ION BEAMS
MECHANICS
PARTICLE PROPERTIES
STORAGE RINGS
SYNCHROTRONS