Characterization of the LCLS-II X-rays with Imagers, Power Meters and Fluorescence Intensity Monitors
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.
Authors
- Alberto Lutman (ORCID: https://orcid.org/0000-0001-5791-9198)
- Douglas Garratt (ORCID: https://orcid.org/0000-0002-8637-9984)
- Oliver Alexander (ORCID: https://orcid.org/0000-0001-8221-7382)
- Philip Heimann (ORCID: https://orcid.org/0000-0002-2973-664X)
- Ming‐Fu Lin (ORCID: https://orcid.org/0000-0001-8086-2484)
- Georgi L. Dakovski (ORCID: https://orcid.org/0000-0003-1563-1190)
- Stefan Moeller (ORCID: https://orcid.org/0000-0002-7783-3532)
- Yuantao Ding (ORCID: https://orcid.org/0000-0003-4338-6428)
- W. F. Schlotter (ORCID: https://orcid.org/0000-0002-1522-7035)
- H.-D. Nuhn (ORCID: https://orcid.org/0000-0002-2796-8965)
- James Cryan (ORCID: https://orcid.org/0000-0002-7776-0919)
- Vincent Esposito (ORCID: https://orcid.org/0000-0001-6153-133X)
- Razib Obaid (ORCID: https://orcid.org/0000-0002-1759-4752)
- Kristjan Kunnus (ORCID: https://orcid.org/0000-0002-9777-2685)
- K. Nakahara
- Matt Seaberg
Institutions
- SLAC National Accelerator Laboratory (US)
- Linac Coherent Light Source (US)
- Imperial College London (GB)
Publication Details
- Journal
- Journal of Physics Conference Series
- Published
- 2025-05-01
- DOI
- https://doi.org/10.1088/1742-6596/3010/1/012100
- Primary Topic
- Medical Imaging Techniques and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00