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Volumetric intensity dependence on the formation of molecular and atomic ions within a high intensity laser focus

Robson, L; Ledingham, K W D; McKenna, P; McCanny, T; Shimizu, S; Yang, J M; Wahlström, Claes-Göran LU ; Lopez, Rodrigo LU ; Varju, Katalin LU and Johnsson, Per LU , et al. (2005) In Journal of the American Society for Mass Spectrometry 16(1). p.82-89
Abstract
The mechanism of atomic and molecular ionization in intense, ultra-short laser fields is a subject which continues to receive considerable attention. An inherent difficulty with techniques involving the tight focus of a laser beam is the continuous distribution of intensities contained within the focus, which can vary over several orders of magnitude. The present study adopts time of flight mass spectrometry coupled with a high intensity (8 X 10(15) Wcm(-2)), ultra-short (20 fs) pulse laser in order to investigate the ionization and dissociation of the aromatic molecule benzene-d1 (C6H5D) as a function of intensity within a focused laser beam, by scanning the laser focus in the direction of propagation, while detecting ions produced only... (More)
The mechanism of atomic and molecular ionization in intense, ultra-short laser fields is a subject which continues to receive considerable attention. An inherent difficulty with techniques involving the tight focus of a laser beam is the continuous distribution of intensities contained within the focus, which can vary over several orders of magnitude. The present study adopts time of flight mass spectrometry coupled with a high intensity (8 X 10(15) Wcm(-2)), ultra-short (20 fs) pulse laser in order to investigate the ionization and dissociation of the aromatic molecule benzene-d1 (C6H5D) as a function of intensity within a focused laser beam, by scanning the laser focus in the direction of propagation, while detecting ions produced only in a "thin" slice (400 and 800 mum) of the focus. The resultant TOF mass spectra varies significantly, highlighting the dependence on the range of specific intensities accessed and their volumetric weightings on the ionization/dissociation pathways accessed. (Less)
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Contribution to journal
publication status
published
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in
Journal of the American Society for Mass Spectrometry
volume
16
issue
1
pages
82 - 89
publisher
Elsevier
external identifiers
  • pmid:15653366
  • wos:000226432300009
  • scopus:19944429266
ISSN
1879-1123
DOI
10.1016/j.jasms.2004.09.018
language
English
LU publication?
yes
id
49467a9e-1f3f-45ca-96e6-e0346a946e26 (old id 255193)
date added to LUP
2007-10-05 12:43:54
date last changed
2017-08-27 04:13:04
@article{49467a9e-1f3f-45ca-96e6-e0346a946e26,
  abstract     = {The mechanism of atomic and molecular ionization in intense, ultra-short laser fields is a subject which continues to receive considerable attention. An inherent difficulty with techniques involving the tight focus of a laser beam is the continuous distribution of intensities contained within the focus, which can vary over several orders of magnitude. The present study adopts time of flight mass spectrometry coupled with a high intensity (8 X 10(15) Wcm(-2)), ultra-short (20 fs) pulse laser in order to investigate the ionization and dissociation of the aromatic molecule benzene-d1 (C6H5D) as a function of intensity within a focused laser beam, by scanning the laser focus in the direction of propagation, while detecting ions produced only in a "thin" slice (400 and 800 mum) of the focus. The resultant TOF mass spectra varies significantly, highlighting the dependence on the range of specific intensities accessed and their volumetric weightings on the ionization/dissociation pathways accessed.},
  author       = {Robson, L and Ledingham, K W D and McKenna, P and McCanny, T and Shimizu, S and Yang, J M and Wahlström, Claes-Göran and Lopez, Rodrigo and Varju, Katalin and Johnsson, Per and Mauritsson, Johan},
  issn         = {1879-1123},
  language     = {eng},
  number       = {1},
  pages        = {82--89},
  publisher    = {Elsevier},
  series       = {Journal of the American Society for Mass Spectrometry},
  title        = {Volumetric intensity dependence on the formation of molecular and atomic ions within a high intensity laser focus},
  url          = {http://dx.doi.org/10.1016/j.jasms.2004.09.018},
  volume       = {16},
  year         = {2005},
}