Low Alpha Experiments at the ALS

Journal Article · Mon Apr 01 04:00:00 EST 1996 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.50303· OSTI ID:288340

Robin, D; Alvis, R; Jackson, A ^[1]; Holtzapple, R; Podobedov, B ^[2]

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1. Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
2. Stanford Linear Accelerator Center, P.O. Box 4349, Stanford, California 94309 (United States)

We present a modified, low alpha lattice for the Advanced Light Source where the quadrupole field strengths have been detuned to allow the momentum compaction factor to be varied smoothly from positive to negative values. With this low alpha lattice we decrease the momentum compaction factor by a factor of 5, to 0.0003 over normal operation, resulting in a measured bunch length reduction by a factor of 2. We also measure the size of the second-order momentum compaction factor as well as store beam in a negative momentum compaction lattice. Streak camera measurements at positive and negative momentum compaction operation show longitudinal beam profile distributions that are in agreement with simulations by Fang {ital et} {ital al}. (8). {copyright} {ital 1996 American Institute of Physics.}

• Research Organization: Lawrence Berkeley National Laboratory
• DOE Contract Number: AC03-76SF00098; AC03-76SF00515
• OSTI ID: 288340
• Report Number(s): CONF-9509227--
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 367; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
BEAM ANALYZERS
BEAM BUNCHING
COMPACTING
ELECTRON BEAMS
QUADRUPOLE MOMENTS
STREAK CAMERAS
SYNCHROTRON RADIATION