skip to main content


This content will become publicly available on January 9, 2019

Title: LCLS in—photon out: fluorescence measurement of neon using soft x-rays

Here, we measured the fluorescence photon yield of neon upon soft x-ray ionization (~1200 eV) from the x-ray free-electron laser at Linac Coherent Light Source, and demonstrated the usage of a grazing incidence spectrometer with a variable line spacing grating to perform x-ray fluorescence spectroscopy on a gas phase system. Our measurements also allowed us to estimate the focal size of the beam from the theoretical description developed, in terms of the rate equation approximation accounting for photoionization shake off of neutral neon and double auger decay of single core holes.
ORCiD logo [1] ; ORCiD logo [2] ;  [3] ;  [4] ;  [3] ;  [3] ;  [3] ;  [3] ;  [3] ;  [3] ;  [2] ; ORCiD logo [4] ;  [1]
  1. Univ. of Connecticut, Storrs, CT (United States). Dept. of Physics
  2. Heidelberg Univ. (Germany). Inst. for Theoretische Chemie, Physikalisch-Chemisches
  3. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  4. Helmholtz-Inst., Jena (Germany); Friedrich Schiller Univ., Jena (Germany). Theoretisch-Physikalisches Inst.
Publication Date:
Grant/Contract Number:
AC02-76SF00515; SC0002004; SC0012376; 05K16SJA
Accepted Manuscript
Journal Name:
Journal of Physics. B, Atomic, Molecular and Optical Physics
Additional Journal Information:
Journal Volume: 51; Journal Issue: 3; Journal ID: ISSN 0953-4075
IOP Publishing
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); German Federal Ministry of Education and Research (BMBF)
Country of Publication:
United States
74 ATOMIC AND MOLECULAR PHYSICS; Ionization; X-ray; Atomic system
OSTI Identifier: