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Title: Strongly aligned gas-phase molecules at free-electron lasers

Here, we demonstrate a novel experimental implementation to strongly align molecules at full repetition rates of free-electron lasers. We utilized the available in-house laser system at the coherent x-ray imaging beamline at the linac coherent light source. Chirped laser pulses, i.e., the direct output from the regenerative amplifier of the Ti:Sa chirped pulse amplification laser system, were used to strongly align 2, 5-diiodothiophene molecules in a molecular beam. The alignment laser pulses had pulse energies of a few mJ and a pulse duration of 94 ps. A degree of alignment of $$\langle {\mathrm{cos}}^{2}{\theta }_{2{\rm{D}}}\rangle =0.85$$ was measured, limited by the intrinsic temperature of the molecular beam rather than by the available laser system. With the general availability of synchronized chirped-pulse-amplified near-infrared laser systems at short-wavelength laser facilities, our approach allows for the universal preparation of molecules tightly fixed in space for experiments with x-ray pulses.
Authors:
 [1] ;  [2] ;  [2] ;  [3] ;  [3] ;  [2] ;  [4] ;  [2] ;  [3] ;  [5] ;  [1] ;  [6] ;  [7] ;  [3] ;  [3] ;  [3] ;  [2] ;  [2] ;  [8] ;  [8] more »;  [9] ;  [10] ;  [11] ;  [6] ;  [2] ;  [6] ;  [12] ;  [13] ;  [2] ;  [1] « less
  1. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); Univ. of Hamburg, Hamburg (Germany)
  2. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  3. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  4. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); European X-ray Free Electron Laser (XFEL), GmbH, Hamburg (Germany)
  5. SLAC National Accelerator Lab., Menlo Park, CA (United States); PULSE Institute, Stanford, CA (United States). SLAC National Accelerator Lab.; Stanford Univ., Stanford, CA (United States)
  6. Aarhus Univ., Aarhus (Denmark)
  7. SLAC National Accelerator Lab., Menlo Park, CA (United States); PULSE Institute, Stanford, CA (United States). SLAC National Accelerator Lab.
  8. PULSE Institute, Stanford, CA (United States). SLAC National Accelerator Lab.
  9. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); Kansas State Univ., Manhattan, KS (United States)
  10. Kansas State Univ., Manhattan, KS (United States)
  11. Max Planck Institute for Nuclear Physics, Heidelberg (Germany)
  12. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); European X-ray Free Electron Laser (XFEL) GmbH, Hamburg (Germany)
  13. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
OSTI Identifier:
1263392
Report Number(s):
SLAC-PUB--16644
Journal ID: ISSN 0953-4075; arXiv:1506.03650
Grant/Contract Number:
AC02-76SF00515
Type:
Accepted Manuscript
Journal Name:
Journal of Physics. B, Atomic, Molecular and Optical Physics
Additional Journal Information:
Journal Volume: 48; Journal Issue: 20; Journal ID: ISSN 0953-4075
Publisher:
IOP Publishing
Research Org:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS PHYS; molecular physics; controlled molecules; alignment; free-electron laser; imaging; coherent diffractive imaging; laser control