Effects of magnetic non-linearities on a stored proton beam and their implications for superconducting storage rings

Conference · Sat Jun 01 00:00:00 EDT 1985

OSTI ID:6385665

Cornacchia, M; Evans, L

A nonlinear lens may be used to study the effect of high-order multipolar field imperfections on a stored proton beam. Such a nonlinear lens is particulary suitable to simulate field imperfections of the types encountered in coil dominated superconducting magnets. We have studied experimentally at the SPS the effect of high order (5th and 8th) single isolated resonances driven by the nonlinear lens. The width of these resonances is of the order one expects to be caused by field errors in superconducting magnets of the SSC type. The experiment shows that, in absence of tune modulation, these resonances are harmless. Slow crossings of the resonance, on the other hand, have destructive effects on the beam, much more so than fast crossings caused by synchrotron oscillations. In the design of future storage rings, sources of low-frequency tune modulation should be avoided as a way to reduce the harmful effects of high order multipolar field imperfection.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6385665
• Report Number(s): LBL-19808; CONF-8503105-10; ON: DE86002867
• Resource Relation: Conference: Orbital dynamics and applications to accelerators workshop, Berkeley, CA, USA, 7 Mar 1985; Other Information: Paper copy only, copy does not permit microfiche production
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
BEAM DYNAMICS
NONLINEAR PROBLEMS
PROTON BEAMS
STORAGE RINGS
ELECTROMAGNETIC LENSES
SUPERCONDUCTING MAGNETS
BEAMS
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
EQUIPMENT
LENSES
MAGNETS
NUCLEON BEAMS
PARTICLE BEAMS
SUPERCONDUCTING DEVICES
430400* - Particle Accelerators- Storage Rings
430200 - Particle Accelerators- Beam Dynamics
Field Calculations
& Ion Optics