Knot undulator to generate linearly polarized photons with low on-axis power density

Details Knot undulator to generate linearly polarized photons with low on-axis power density Knot undulator to generate linearly polarized photons with low on-axis power density

2008-02-02

arxiv.org/abs/0802.0237v1

Rev.Sci.Instrum.80:085108,2009

Physics

Accelerator Physics

Scientific paper

10.1063/1.3204452

Heat load on beamline optics is a serious problem to generate pure linearly polarized photons in the third generation synchrotron radiation facilities. For permanent magnet undulators, this problem can be overcome by a figure-8 operating mode. But there is still no good method to tackle this problem for electromagnetic elliptical undulators. Here, a novel operating mode is suggested, which can generate pure linearly polarized photons with very low on-axis heat load. Also the available minimum photon energy of linearly polarized photons can be extended much by this method.

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