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Field-free molecular alignment probed by the free electron laser in Hamburg (FLASH)

Johnsson, Per LU ; Rouzée, A.; Siu, W.; Huismans, Y.; Lépine, F.; Marchenko, T.; Düsterer, S.; Tavella, F.; Stojanovic, N. and Azima, A., et al. (2009) In Journal of Physics B: Atomic, Molecular and Optical Physics 42(13). p.134017-134017
Abstract
High flux extreme ultraviolet (XUV) sources like the free electron laser (FEL) in Hamburg (FLASH) offer the possibility of diffractive imaging of small objects. Irrespective of whether the diffraction is based on the detection of photons or photoelectrons, it is required that the measurement is done in the reference frame of the molecule meaning that, for a sample of several molecules, it is necessary to pre-align the molecules in the sample. As a step towards performing molecular frame diffraction experiments, we report experiments on field-free molecular alignment performed at FLASH. The impulsive alignment induced by a 100 fs near-infrared laser pulse in a rotationally cold CO 2 sample is characterized by ionizing and dissociating the... (More)
High flux extreme ultraviolet (XUV) sources like the free electron laser (FEL) in Hamburg (FLASH) offer the possibility of diffractive imaging of small objects. Irrespective of whether the diffraction is based on the detection of photons or photoelectrons, it is required that the measurement is done in the reference frame of the molecule meaning that, for a sample of several molecules, it is necessary to pre-align the molecules in the sample. As a step towards performing molecular frame diffraction experiments, we report experiments on field-free molecular alignment performed at FLASH. The impulsive alignment induced by a 100 fs near-infrared laser pulse in a rotationally cold CO 2 sample is characterized by ionizing and dissociating the molecules with a time-delayed XUV-FEL pulse. The time-dependent angular distributions of ionic fragments measured by a velocity map imaging spectrometer exhibit rapid changes associated with the induced rotational dynamics. The experimental results show hints of a dissociation process that depends nonlinearly on the XUV intensity. (Less)
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Journal of Physics B: Atomic, Molecular and Optical Physics
volume
42
issue
13
pages
134017 - 134017
publisher
IOP Publishing
external identifiers
  • scopus:70350207261
ISSN
0953-4075
language
English
LU publication?
no
id
9458d016-747c-4de9-b28e-fc77d8eb023a (old id 3217549)
alternative location
http://stacks.iop.org/0953-4075/42/i=13/a=134017
date added to LUP
2012-12-14 20:00:53
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2017-08-27 04:30:17
@article{9458d016-747c-4de9-b28e-fc77d8eb023a,
  abstract     = {High flux extreme ultraviolet (XUV) sources like the free electron laser (FEL) in Hamburg (FLASH) offer the possibility of diffractive imaging of small objects. Irrespective of whether the diffraction is based on the detection of photons or photoelectrons, it is required that the measurement is done in the reference frame of the molecule meaning that, for a sample of several molecules, it is necessary to pre-align the molecules in the sample. As a step towards performing molecular frame diffraction experiments, we report experiments on field-free molecular alignment performed at FLASH. The impulsive alignment induced by a 100 fs near-infrared laser pulse in a rotationally cold CO 2 sample is characterized by ionizing and dissociating the molecules with a time-delayed XUV-FEL pulse. The time-dependent angular distributions of ionic fragments measured by a velocity map imaging spectrometer exhibit rapid changes associated with the induced rotational dynamics. The experimental results show hints of a dissociation process that depends nonlinearly on the XUV intensity.},
  author       = {Johnsson, Per and Rouzée, A. and Siu, W. and Huismans, Y. and Lépine, F. and Marchenko, T. and Düsterer, S. and Tavella, F. and Stojanovic, N. and Azima, A. and Treusch, R. and Kling, M. F. and Vrakking, M. J. J.},
  issn         = {0953-4075},
  language     = {eng},
  number       = {13},
  pages        = {134017--134017},
  publisher    = {IOP Publishing},
  series       = {Journal of Physics B: Atomic, Molecular and Optical Physics},
  title        = {Field-free molecular alignment probed by the free electron laser in Hamburg (FLASH)},
  volume       = {42},
  year         = {2009},
}