Dynamic aperture and emittance growth rates in the HERA proton ring
- Deutsches Elektronen-Synchrotron DESY, Notkestr. 85 2000 Hamburg 52 (Germany)
The dynamic aperture of the HERA proton ring is limited by persistent current field errors in the superconducting magnets. Its value as predicted by tracking studies is compared to preliminary aperture measurements in the machine. Since inclusion of tune modulation leads to a significant reduction of the aperture in the simulation, a theory is developed, which quantifies the impact of tune modulation on high-order resonances. For a typical working point, parameters of resonances up to order 11 are calculated for a model of HERA using differential algebra and normal-form algorithms. Based on these resonance parameters, estimate values are derived of amplitude-dependent emittance growth rates caused by the interplay of tune modulation and nonlinear field errors.
- OSTI ID:
- 6944373
- Report Number(s):
- CONF-921077-; CODEN: APCPCS
- Journal Information:
- AIP Conference Proceedings (American Institute of Physics); (United States), Vol. 292:1; Conference: Workshop on the stability of particle motion in storage rings, Upton, NY (United States), 19-24 Oct 1992; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
HERA STORAGE RING
BEAM DYNAMICS
BEAM EMITTANCE
ALGORITHMS
COMPUTERIZED SIMULATION
ERRORS
MAGNETIC FIELD CONFIGURATIONS
NONLINEAR PROBLEMS
PHASE SPACE
PROTON BEAMS
STABILITY
TUNING
BEAMS
MATHEMATICAL LOGIC
MATHEMATICAL SPACE
NUCLEON BEAMS
PARTICLE BEAMS
SIMULATION
SPACE
STORAGE RINGS
430200* - Particle Accelerators- Beam Dynamics
Field Calculations
& Ion Optics
430400 - Particle Accelerators- Storage Rings