科技报告详细信息
An effective longitudinal space-charge impedance model for beamswith non-uniform and non-axissymmetric transverse density
Venturini, Marco
Lawrence Berkeley National Laboratory
关键词: Space Charge Space Charge Impedance;    Space Charge Impedance;    Impedance;    43;    Instability;   
DOI  :  10.2172/927331
RP-ID  :  LBNL--63111
RP-ID  :  DE-AC02-05CH11231
RP-ID  :  927331
美国|英语
来源: UNT Digital Library
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【 摘 要 】

Use of a one-dimensional model of longitudinal space-charge(SC) impedance has been proposed for studying the microbunchinginstability in single-pass delivery systems relevant for the nextgeneration of FELs. For beams with uniform transverse density andcircular cross-section of radius r_b the SC impedance can be expressed ina handy analytical form, making this model particularly convenient. Inthis report we show how with an appropriate choice of r_b one can usethis as an effective-beam model to approximate beams with non-axissymmetric and non-uniform transverse densities.

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