Abstract
The SwissFEL Aramis beamline, covering the photon energies between 1.77 keV and 12.7 keV, features a suite of online photon diagnostics tools to help both users and FEL operators in analysing data and optimizing experimental and beamline performance. Scientists will be able to obtain information about the flux, spectrum, position, pulse length, and arrival time jitter versus the experimental laser for every photon pulse, with further information about beam shape and size available through the use of destructive screens. This manuscript is an overview of the diagnostics tools available at SwissFEL and presents their design, working principles and capabilities. It also features new developments like the first implementation of a THz-streaking based temporal diagnostics for a hard X-ray FEL, capable of measuring pulse lengths to 5 fs r.m.s. or better.
Highlights
The rapid development of X-ray free-electron laser (XFEL) facilities like FLASH, FERMI, LCLS, SACLA, PAL-XFEL and SwissFEL (Ackermann et al, 2007; Allaria et al, 2010; 2013; Emma et al, 2010; Ishikawa et al, 2012; Oberta et al, 2011; Milne et al, 2017; Ko et al, 2017) has brought a wave of new experiments that use the high intensities, short pulses or high coherence properties of the FEL X-ray pulses. Both machine operators and users quickly noted that the pulse properties could and would change on a shot-to-shot basis, especially for those facilities that produced their FEL light using the self-amplified spontaneous emissions (SASE) process (Saldin & Kondratenko, 1980; Bonifacio et al, 1984), making the evaluation of the data gathered during an experiment more difficult
This paper describes the devices featured at the SwissFEL Aramis beamline, which has photon energies ranging between 1.77 and 12.7 keV, and explains their working principles, measurement properties and possible applications for the users of the facility and for machine operators
The photon diagnostics at SwissFEL will provide pulse-topulse data on the position, flux, pulse length, spectrum and arrival time at 100 Hz, the pulse repetition rate of SwissFEL
Summary
The rapid development of X-ray free-electron laser (XFEL) facilities like FLASH, FERMI, LCLS, SACLA, PAL-XFEL and SwissFEL (Ackermann et al, 2007; Allaria et al, 2010; 2013; Emma et al, 2010; Ishikawa et al, 2012; Oberta et al, 2011; Milne et al, 2017; Ko et al, 2017) has brought a wave of new experiments that use the high intensities, short pulses or high coherence properties of the FEL X-ray pulses. This paper describes the devices featured at the SwissFEL Aramis beamline, which has photon energies ranging between 1.77 and 12.7 keV, and explains their working principles, measurement properties and possible applications for the users of the facility and for machine operators
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
