Title :
An isochronous lattice for PEP
Author :
Corbett, W.J. ; Donald, M H R ; Garren, A.A.
Author_Institution :
SLAC, Stanford, CA, USA
Abstract :
It is demonstrated that an isochronous lattice design is compatible with the Positron Electron Project (PEP) given a minimum of hardware modifications. The configuration is based on a succession of supercells (3 FODO cells each) with regions of negative dispersion and betatron phase advance between pairs of compensating sextupoles fixed at (2n+1) pi . The configuration requires no magnet relocations or quadrupole polarity reversals and does not exceed power load ratings for a 9-GeV beam. The theoretical bunch length is about 3.5 mm at 9 GeV (V/sub RF/= 15 MV), but smaller values could in principle be reached by correcting the longitudinal chromaticity with additional sextupole families.<>
Keywords :
electron accelerators; storage rings; FODO cells; PEP; Positron Electron Project; betatron phase advance; compensating sextupoles; isochronous lattice design; longitudinal chromaticity; negative dispersion; power load ratings; quadrupole polarity reversals; supercells; Compaction; Electrons; Hardware; Laboratories; Lattices; Light sources; Linear accelerators; Magnets; Storage rings; Synchrotron radiation;
Conference_Titel :
Particle Accelerator Conference, 1991. Accelerator Science and Technology., Conference Record of the 1991 IEEE
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-0135-8
DOI :
10.1109/PAC.1991.165130
