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.

Details

Title
Characterization of the LCLS-II X-rays with Imagers, Power Meters and Fluorescence Intensity Monitors
Author
Heimann, Philip 1 ; Oliver, Alexander 2 ; Cryan, James 1 ; Dakovski, Georgi 1 ; Ding, Yuantao 1 ; Esposito, Vincent 1 ; Garratt, Douglas 1 ; Kunnus, Kristjan 1 ; Ming-Fu, Lin 1 ; Lutman, Alberto 1 ; Moeller, Stefan 1 ; Nakahara, Kazutaka 1 ; Heinz-Dieter Nuhn 1 ; Obaid, Razib 1 ; Seaberg, Matt 1 ; Schlotter, William 1 

 Linac Coherent Light Source, SLAC National Accelerator Laboratory , 2575 Sand Hill Road, Menlo Park, California 94025, USA 
 Department of Physics, Imperial College London , Blackett Laboratory, London, SW7 2AZ, UK 
First page
012100
Publication year
2025
Publication date
May 2025
Publisher
IOP Publishing
ISSN
17426588
e-ISSN
17426596
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
3216360466
Copyright
Published under licence by IOP Publishing Ltd. This work is published under https://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.