Highly efficient soft x-ray spectrometer for transient absorption spectroscopy with broadband table-top high harmonic sources.
Journal
Structural dynamics (Melville, N.Y.)
ISSN: 2329-7778
Titre abrégé: Struct Dyn
Pays: United States
ID NLM: 101660872
Informations de publication
Date de publication:
May 2021
May 2021
Historique:
received:
25
02
2021
accepted:
04
05
2021
entrez:
8
7
2021
pubmed:
9
7
2021
medline:
9
7
2021
Statut:
epublish
Résumé
We present a novel soft x-ray spectrometer for ultrafast absorption spectroscopy utilizing table-top femtosecond high-order harmonic sources. Where most commercially available spectrometers rely on spherical variable line space gratings with a typical efficiency on the order of 3% in the first diffractive order, this spectrometer, based on a Hettrick-Underwood design, includes a reflective zone plate as a dispersive element. An improved efficiency of 12% at the N K-edge is achieved, accompanied by a resolving power of 890. The high performance of the soft x-ray spectrometer is further demonstrated by comparing nitrogen K-edge absorption spectra from calcium nitrate in aqueous solution obtained with our high-order harmonic source to previous measurements performed at the electron storage ring facility BESSY II.
Identifiants
pubmed: 34235230
doi: 10.1063/4.0000096
pii: 4.0000096
pmc: PMC8249000
doi:
Types de publication
Journal Article
Langues
eng
Pagination
034302Informations de copyright
© 2021 Author(s).
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