Observations of collective effects at the Advanced Light Source
We present a summary of measurements of single beam collective effects in the Advanced Light Source (ALS). We describe measurements of coupled-bunch instabilities, including some recent results using the newly commissioned feedback systems and the results of an initial search for the fast ion instability. Single bunch effects include bunch lengthening, energy spread increase, HOM loss measurements, head-tail damping rates, current dependent tune shifts, and transverse mode coupling instability threshold. The longitudinal measurements are consistent with a broadband impedance {vert_bar}{Zeta}{sub {parallel}}/{eta}{vert_bar}{sub eff} = 0.22{plus_minus}0.07 {Omega} and transverse measurements indicate broadband impedances of {Zeta}{sub y,eff} = 155 k{Omega}/m and Z{sub x,eff} = 58 k{Omega}/m.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 198691
- Report Number(s):
- LBL-37819; CBP-Note-159; CONF-9506279-5; ON: DE96004726; TRN: 96:008258
- Resource Relation:
- Conference: CEIBA95: international workshop on collective effects and impedance for B-factories, Tsukuba (Japan), 12-17 Jun 1995; Other Information: PBD: Oct 1995
- Country of Publication:
- United States
- Language:
- English
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