Controls in use at CESR for adjusting horizontal to vertical coupling
Machine alignment errors can cause coupled transverse motion that may adversely affect the operation of particle accelerators in many ways. This situation can occur in any circular accelerator during injection and produce unnecessary transverse motion and emittance blowup, or in colliding beam storage rings and reduce the luminosity. Skew quadrupoles, SQ, have been recognized as elements for decoupling the horizontal and vertical motion, but the proper adjustment of these SQ's is difficult since each SQ affects several independant coupling parameters. At CESR (Cornell Electron Storage Ring), an electronpositron colliding beam facility, a group of control functions has been created to allow for ease of coupling adjustments. Since CESR operates with a small natural vertical to horizontal emittance ratio, these control functions are important for limiting vertical enlargement which reduces the colliding beam luminosity. The basic theory for these controls is presented along with data to demonstrate their effectiveness.
- Research Organization:
- Newman Laboratory of Nuclear Studies, Cornell University, Ithaca, NY
- OSTI ID:
- 6188742
- Report Number(s):
- CONF-850504-
- Journal Information:
- IEEE Trans. Nucl. Sci.; (United States), Journal Name: IEEE Trans. Nucl. Sci.; (United States) Vol. NS-32:5; ISSN IETNA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
430302 -- Particle Accelerators-- Injection & Extraction Systems
430400* -- Particle Accelerators-- Storage Rings
ALIGNMENT
BEAM DYNAMICS
BEAM EMITTANCE
BEAM INJECTION
BEAM-BEAM INTERACTIONS
BEAMS
CESR STORAGE RING
COLLIDING BEAMS
CONTROL
CONTROL SYSTEMS
COUPLING
LUMINOSITY
MULTIPOLES
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
QUADRUPOLES
STORAGE RINGS