Models of Longitudinal Space-Charge Impedance for the Study of theMicrobunching Instability
Journal Article
·
· Physical Review Special Topics, AB
OSTI ID:932694
A 1D model of space-charge impedance, assuming atransversely uniform beam with circular cross-section, has been proposedand is being extensively used in the modelling of the microbunchinginstability of relevance for the beam delivery systems of x-ray FELs. Inthis paper we investigate the limitation of the model when applied tostudying the effect of shot noise--one of the sources of themicrobunching instability. We make comparison witha fully 3D calculationand identify the upper end of the frequency spectrum for applicability ofthe 1D model. Relaxation of the assumptions regarding axis-symmetry anduniformity of the transverse density is also reviewed.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- DE-AC02-05CH11231
- OSTI ID:
- 932694
- Report Number(s):
- LBNL-63108; R&D Project: Z3FEL3; BnR: YN0100000; TRN: US0803646
- Journal Information:
- Physical Review Special Topics, AB, Vol. 11; Related Information: Journal Publication Date: 2008
- Country of Publication:
- United States
- Language:
- English
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