Speaker
Description
Marcio Paduan Donadio, Marc Campell, Vincent Esposito, Philip Heimann, Dawood Alnajjar, Yuantao Ding, Thi Le, Alberto Lutman, Heinz-Dieter Nuhn, William Schlotter, Jan Gruenert, Kai Tiedtke, Fini Jastrow, and Stefan Moeller
Linac Coherent Light Source, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California, 94025, United States
* European XFEL, Holzkoppel 4, Schenefeld, 22869, Germany
*Deutsches Elektronen-Synchrotron, Notkestrasse 85, 22607 Hamburg, Germany
The LCLS-II superconducting accelerator has started operations after successful commissioning last August/September of 2024. Some of the initial performance parameters are photon energy range from 250 eV to 3.8 keV and a maximum repetition rate of 1 kHz. In the soft x-ray energy range (250-1000eV) we used a set of Gas-based Monitor Detectors (GMD) to measure first lasing photons and to transition to operations. Besides providing FEL intensity measurements we calibrated the photon energy and FEL bandwidth with a simple method by using a pair of GMDs while scanning the undulator gap. Results in the soft x-ray range are presented that complement the results in the hard x-ray range.
