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Abstract
The LCLS-II superconducting accelerator has begun operations and has been producing x-rays since August 2023. The current parameters are a photon energy range from 250 eV to 3.8 keV and a maximum repetition rate of 8.29 kHz. Imagers have determined the x-ray beam dimensions and the divergence. The absorption edges of solid filters were used to calibrate the photon energy and evaluate the FEL bandwidth from the hard x-ray undulator. A power meter measured the pulse energy at 2.5 keV. Power meters have ascertained the beamline transmission at the TMO and RIX instruments. The Fluorescence Intensity Monitor (FIM) provides a normalization of the x-ray intensity at the RIX endstations. The signal-to-noise ratio of the FIM has been improved by an analysis of the entire detector waveforms.
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Details
1 Linac Coherent Light Source, SLAC National Accelerator Laboratory , 2575 Sand Hill Road, Menlo Park, California 94025, USA
2 Department of Physics, Imperial College London , Blackett Laboratory, London, SW7 2AZ, UK