The effect of NEG coating on resistive wall wake field
The effect of NEG coating on resistive wall wake field
复制标题
NEG涂层对电阻壁尾流场的影响
DOI:
10.1016/j.nima.2011.04.043
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发表时间:
2011
期刊:
影响因子:
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通讯作者:
Hock K
中科院分区:
文献类型:
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作者:
Hock K
The procedure for calculating the resistive wall impedance is simplified using Gaussian elimination with a sufficiently large floating point precision. This procedure generalises readily to the multilayer beam pipe wall. We apply this to investigate the effect of NEG coating on the transverse wake field coupling between electron bunches in the ILC damping ring. For a 5GeV electron beam and 3cm radius aluminium beam pipe, a 1μm thick NEG coating is found to increase the impedance around 10GHz. The wake field over a distance of 300km around the ring is required for the study of the multi-bunch instabilities. This has to be obtained by Fourier transforming over a very wide range of frequencies. To overcome the computation problem, we developed a way of splitting up the frequencies into three overlapping ranges, and then joining the transforms together to obtain the overall wake field. The results for a few NEG coating thicknesses are presented.
DOI:
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发表时间:
2007
期刊:
影响因子:
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作者:
A. Al;R. Hasse;O. Boine;W. Daqa;I. Hofmann
通讯作者:
I. Hofmann
DOI:
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发表时间:
2004
期刊:
影响因子:
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作者:
R. Nagaoka;Synchrotron Soleil
通讯作者:
Synchrotron Soleil
DOI:
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发表时间:
2005
期刊:
影响因子:
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作者:
B. Zotter
通讯作者:
B. Zotter