Fig. 3: Measurement of variable polarisation for soft X-rays at 700 eV. | Nature Communications

Fig. 3: Measurement of variable polarisation for soft X-rays at 700 eV.

From: An X-ray free-electron laser with a highly configurable undulator and integrated chicanes for tailored pulse properties

Fig. 3

The plots show the recoil ion momentum distribution of He+ ions projected onto the plane of the X-ray propagation direction with (a) linear horizontal (LH), (b) linear vertical (LV), and (c) circular polarised (CP) radiation. The arrows indicate the polarisation direction. The radius of the distribution corresponds to the absolute momentum of 7 a.u. (atomic units) imparted by the photoelectron onto the recoil ion.

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