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. 2015 Feb 6;114(5):054801.
doi: 10.1103/PhysRevLett.114.054801. Epub 2015 Feb 6.

Experimental demonstration of a soft x-ray self-seeded free-electron laser

D Ratner  1 , R Abela  2 , J Amann  1 , C Behrens  1 , D Bohler  1 , G Bouchard  1 , C Bostedt  1 , M Boyes  1 , K Chow  3 , D Cocco  1 , F J Decker  1 , Y Ding  1 , C Eckman  1 , P Emma  1 , D Fairley  1 , Y Feng  1 , C Field  1 , U Flechsig  2 , G Gassner  1 , J Hastings  1 , P Heimann  1 , Z Huang  1 , N Kelez  1 , J Krzywinski  1 , H Loos  1 , A Lutman  1 , A Marinelli  1 , G Marcus  1 , T Maxwell  1 , P Montanez  1 , S Moeller  1 , D Morton  1 , H D Nuhn  1 , N Rodes  3 , W Schlotter  1 , S Serkez  4 , T Stevens  3 , J Turner  1 , D Walz  1 , J Welch  1 , J Wu  1
Affiliations

Experimental demonstration of a soft x-ray self-seeded free-electron laser

D Ratner et al. Phys Rev Lett. .

Abstract

The Linac Coherent Light Source has added a self-seeding capability to the soft x-ray range using a grating monochromator system. We report the demonstration of soft x-ray self-seeding with a measured resolving power of 2000-5000, wavelength stability of 10(-4), and an increase in peak brightness by a factor of 2-5 across the photon energy range of 500-1000 eV. By avoiding the need for a monochromator at the experimental station, the self-seeded beam can deliver as much as 50-fold higher brightness to users.

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