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
复制
发表时间:
2011
期刊:
Accelerators, Spectrometers, Detectors and Associated Equipment
影响因子:
--
通讯作者:
Hock K
Hock K
中科院分区:
--
文献类型:
--
作者:
Hock K

文献摘要

参考文献

被引文献

相似文献

利用具有足够大的浮点精度的高斯消去法简化了阻性壁阻抗的计算过程。该方法很容易推广到多层梁式管壁。在此基础上,研究了NEG涂层对ILC阻尼环中电子束间横向尾迹场耦合的影响。对于5GeV电子束和3 cm半径的铝束管,1μm厚的NEG涂层可使阻抗增加约10 GHz。为了研究多束团不稳定性,需要得到环周围300公里范围内的尾迹场。这必须通过在非常宽的频率范围内进行傅里叶变换来获得。为了克服计算问题,我们开发了一种方法,将频率分裂成三个重叠的范围,然后将变换连接在一起,得到整体尾迹场。给出了几种NEG涂层厚度的结果。
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: --
发表时间: 2007
期刊:
影响因子: --
作者:
A. Al;R. Hasse;O. Boine;W. Daqa;I. Hofmann
通讯作者: I. Hofmann
电阻墙对太阳影响的研究
DOI: --
发表时间: 2004
期刊:
影响因子: --
作者:
R. Nagaoka;Synchrotron Soleil
通讯作者: Synchrotron Soleil
DOI: --
发表时间: 2005
期刊:
影响因子: --
作者:
B. Zotter
通讯作者: B. Zotter