A Siberian snake with overlapping depolarizing resonances

• Published in: Physical review letters Vol. 70; no. 17; pp. 2557 - 2560
• Main Authors: Baiod, R, Chu, CM, Courant, ED, Derbenev, YS, Duryea, J, Koulsha, AV, Krisch, AD, Minty, MG, Nurushev, TS, Phelps, RA, Shoumkin, DS, Wong, VK, Caussyn, DD, Lee, SY, Rinckel, T, Sperisen, F, Stephenson, EJ, von Przewoski B, Ohmori, C, Pancella, PV, Ratner, LG, Wienands, U
• Format: Journal Article
• Language: English
• Published: United States 26-04-1993
• Subjects: ACCELERATION; BEAMS; COUPLING; DATA; ELECTRIC COILS; ELECTRICAL EQUIPMENT; ELECTROMAGNETS; ELEMENTS; EXPERIMENTAL DATA; INFORMATION; MAGNETS; METALS; NUCLEON BEAMS; NUMERICAL DATA; ORIENTATION; PARTICLE ACCELERATORS; PARTICLE BEAMS; PROTON BEAMS; RARE EARTHS; RESONANCE; RF SYSTEMS; SOLENOIDS; SPIN ORIENTATION; SUPERCONDUCTING DEVICES 430200 > Particle Accelerators > Beam Dynamics, Field Calculations, & Ion Optics; SUPERCONDUCTING MAGNETS; THULIUM
• ISSN: 0031-9007; 1079-7114
• DOI: 10.1103/PhysRevLett.70.2557

The behavior of overlapping'' depolarizing resonances was studied using a stored 106.4-MeV polarized proton beam. We used an rf solenoid magnet to create an rf induced'' depolarizing resonance which was then forced to overlap with the [ital G][gamma]=2 imperfection depolarizing resonance. We found significant interactions between the two resonances by varying their frequencies and strengths; the frequency of the rf resonance strongly affected the response of the imperfection resonance to correction magnetic fields. The Siberian snake overcame all observable depolarization due to the overlapping resonances and maintained full polarization for all observed frequencies and strengths.