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Figure 15
Time-resolved XMCD measurement of a 20 nm Ni film performed at the Ni L3 edge taken with the twin amplifier scheme after the upgrades and with active feedback systems in operation. The blue dots are averaged data over a few hours and the black curve is a fit to the data based on two exponentials. The upper limit for the pump–probe time resolution is 140 fs as partly determined by the demagnetization time of the Ni layer (Stamm et al., 2010BB41).

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