Energy shift of a depolarizing resonance due to a type-3 Siberian snake

Journal Article · Sun Sep 01 00:00:00 EDT 1991 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.44.R1361· OSTI ID:5232199

Minty, M G; Ellison, T J.P.; Goodwin, J E; Lee, S Y; Pancella, P V; Rinckel, T; Ross, M A; Sperisen, F; Stephenson, E J; von Przewoski, B ^[1]; Baiod, R; Derbenev, Y S; Krisch, A D; Phelps, R A; Roser, T; van Guilder, B S; Vuaridel, B ^[2]; Courant, E D; Ratner, L G ^[3]

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1. Indiana University Cyclotron Facility, Bloomington, Indiana (USA)
2. Randall Laboratory of Physics, The University of Michigan, Ann Arbor, Michigan (USA)
3. Brookhaven National Laboratory, Upton, New York (USA)

We recently studied the proton beam polarization in the Indiana University Cyclotron Facility Cooler Ring at five energies. We found that the {ital G}{gamma}=2 imperfection depolarizing resonance occurred about 1.9 MeV below the expected resonance energy of 108.4 MeV. This energy shift could be due to a shift of about +0.0036 in the spin tune {nu}{sub {ital s}}, which is the number of spin rotations in each turn around the ring. We then demonstrated that this spin tune shift is consistent with the Cooler Ring containing a partial type-3 Siberian snake, which is apparently caused by the magnets that confine the electron and proton beams in the cooling region.

• OSTI ID: 5232199
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 44:5; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430400* -- Particle Accelerators-- Storage Rings
ACCELERATORS
BEAM COOLING
BEAMS
DATA
DEPOLARIZATION
ENERGY RANGE
EXPERIMENTAL DATA
INFORMATION
MAGNETIC FIELDS
MEV RANGE
MEV RANGE 01-10
NUCLEON BEAMS
NUMERICAL DATA
PARTICLE BEAMS
POLARIZATION
POLARIZED BEAMS
PROTON BEAMS
RESONANCE