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Title: Time-resolved ionization measurements with intense ultrashort XUV and X-ray free-electron laser pulses

Journal Article · · Laser and Particle Beams
 [1];  [2];  [3];  [4];  [5];  [5];  [6];  [6];  [6];  [6];  [6];  [6];  [7];  [5];  [8];  [8];  [9];  [8];  [10]
  1. Hochschule Emden/Leer Univ. of Applied Sciences (Germany); Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  2. Hochschule Emden/Leer Univ. of Applied Sciences (Germany)
  3. Hochschule Emden/Leer Univ. of Applied Sciences (Germany); Inst. of the Helmholtz-Zentrum Dresden-Rossendorf (Germany)
  4. Academy of Sciences of the Czech Republic (ASCR), Prague (Czech Republic)
  5. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  6. Elettra Sincrotrone Trieste (Italy)
  7. Univ. of Hamburg (Germany)
  8. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  9. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); Polish Academy of Sciences (PAS), Krakow (Poland)
  10. Hochschule Emden/Leer Univ. of Applied Sciences (Germany); Carl von Ossietzky Univ. (Germany)
+ Show Author Affiliations

Abstract Modern free-electron lasers (FEL) operating in XUV (extreme ultraviolet) or X-ray range allow an access to novel research areas. One instance is the ultrafast ionization of a solid by an intense femtosecond FEL pulse in XUV which consequently leads to a change of the complex index of refraction on an ultrashort timescale. The photoionization and subsequent impact ionization resulting in electronic and atomic dynamics are modeled with our hybrid code XTANT(X-ray thermal and non-thermal transitions) and a Monte Carlo code XCASCADE(X-ray-induced electron cascades). The simulations predict the temporal kinetics of FEL-induced electron cascades and thus yield temporally and spatially resolved information on the induced changes of the optical properties. In a series of experiments at FERMI and LCLS, single shot measurements with spatio-temporal encoding of the ionization process have been performed by a correlation of the FEL pump pulse with an optical femtosecond probe pulse. An excellent agreement between the experiment and the simulation has been found. Furthermore, we demonstrate that such kind of experiments forms the basis for pulse duration and arrival time jitter monitoring as currently under development for XUV-FELs.

Research Organization:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Organization:
USDOE; German Ministry of Education and Research
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1547231
Journal Information:
Laser and Particle Beams, Vol. 37, Issue 2; ISSN 0263-0346
Publisher:
Cambridge University PressCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

References (21)

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Cited By (1)

Time-resolved investigation of the optical phase change as a potential diagnostics tool for extreme-ultraviolet free-electron-laser pump and optical probe experiments journal December 2019

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Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
Free-electron laser
XUV
X-ray