Khodyachykh, Sergiy ; Brunken, Marco ; Genz, Harald ; Gräf, Hans-Dieter ; Hessler, Christoph ; Richter, Achim ; Wesp, Thorsten ; Asgekar, Vivek ; Saldin, E. ; Schneidmiller, E. ; Yurkov, M. (2004)
Observation of an FEL efficiency increase caused by magnetic field tapering of the undulator.
In: Nuclear instruments and methods in physics research - A, 530
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