Multiphoton Ionization of Atomic and Molecular Hydrogen at 0.53<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>μ</mml:mi></mml:math>

LuVan, M.; Mainfray, G.; Manus, C.; Tugov, I. I.

doi:10.1103/physreva.7.91

Cited by 65 publications

(4 citation statements)

References 15 publications

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“…Breakdown measurements at A = 0.53 pm using picosecond pulses have been carried out in nitrogen and argon by Ireland and Grey Morgan (1974) and in air by Williams et af (1983). The MPI cross sections for nitrogen and argon at 0.53 pm have been measured at very low pressures ( p b Torr) by the group at Saclay (Agostini et a1 1970, LuVan andMainfray 1972, L'Huillier et af 1983). Based on these cross sections, one would expect complete ionisation of nitrogen and argon at I b 10l2 W cm-2 and pulse lengths -cp b 10 PS, which is more than an order of magnitude below the measured thresholds at atmospheric pressure (Williams et a1 1983, Ireland andGrey Morgan 1974).…”

Section: Introductionmentioning

confidence: 99%

Laser-induced breakdown in nitrogen and the rare gases at 0.53 and 0.357μm

Rosen

Weyl

1987

J. Phys. D: Appl. Phys.

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Section: Introductionmentioning

confidence: 99%

Laser-induced breakdown in nitrogen and the rare gases at 0.53 and 0.357μm

Rosen

Weyl

1987

J. Phys. D: Appl. Phys.

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“…This, too, required a sophisticated theory which had not yet been tested in a nonresonant case. Finally, only one group (LuVan et al 1973) working with atomic hydrogen measured absolute numbers of ionizations. The others were interested primarily in the ac Stark shift (Kelleher, Ligare, and Brewer 1985), ionization by two applied radiation fields (Muller, van Linden van den Heuvell, and van der Wiel 1986), or angular distributions of the resulting electrons (Feldmann et al 1987, Wolff et al 1988, Rottke et al 1990.…”

Section: Comparisons To Ati Theorymentioning

confidence: 99%

Measurement of intensity-dependent rates of above-threshold ionization (ATI) of atomic hydrogen at 248 nm

Nichols¹

1991

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saved me countless hours in the lab and taught me many valuable si Us such as how to keep an ultrahigh vacuum system clean and how to choose a capacitor for a short-pulse circuit. In this dissertation, I have tried to distinguish between things I can claim credit for individually ("I measured ...") and group efforts ("We measured ..."). I depended on Group CLS-5, especially Dr. Toni Taylor, Sue Harper, and Jeff Roberts, to maintain and operate the LABS-I laser. They also provided the measurement of the pulse length. They went out of their way several times to help me when I needed a little extra laser time at the end of the day. Space does not permit listing all the others at LANL who helped in particular situations, discussed my work and theirs, or kept the paperwork flowing so that I could work in the lab, but they are a big part of the reason that Los Alamos is a good place to work. At UNM, Dr. Wilhelm Becker took the time on many occasions to help me understand the theory of ATI and to describe it accurately in my dissertation. I also thank Dr. Thomas Niemczyk of the Chemistry Department for serving on my committee. Finally, I thank Dr. Shih-I Chu for allowing me to use his theoretical results prior to publication, and Dr. George Csanak for correcting the misprint in the paper by Keldysh. IBM and PC-AT are registered trademarks of International Business Machines Corporation. Microsoft is a registered trademark of Microsoft Corporation. Pyrex is a registered trademark of Corning Glass Works.

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“…In early experiments, laser intensity (I < 10 12 W/cm 2 ) was much lower than atomic coulomb field (10 16 W/cm 2 ). Therefore, the MPI could be accurately described by Low Order Perturbation Theory (LOPT) [5][6][7]. However, LOPT has difficulties in explaining some nonperturbative phenomena such as near-resonant MPI [8], and AC Stark shift of atomic energy levels [9], which occurs when the laser intensity was sufficiently high.…”

Section: Introductionmentioning

confidence: 99%

Computational Investigation of the Interaction Between Hydrogen Atoms and an Intense Circularly Polarized Laser Field

Yang

Wang

Zhang

et al. 2012

Commun. comput. phys.

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The study of interactions between a high-power laser and atoms has been one of the fundamental and interesting topics in strong field physics for decades. Based on a nonperturbative model, ten years ago, we developed a set of programs to facilitate the study of interactions between a circularly polarized laser and atomic hydrogen. These programs included only contribution from the bound states of the hydrogen atom. However, as the laser intensity increases, contribution from continuum states to the excitation and ionization processes becomes larger and can no longer be neglected. Furthermore, because the original code is not able to add this contribution directly due to its many disadvantages, a major upgrade of the code is required before including the contribution from continuum states in future. In this paper, first we deduce some important formulas for contribution of continuum states and present modifications and tests for the upgraded code in detail. Second we show some comparisons among new results, old results from the original codes and the available experimental data. Overall the new result agrees with experimental data well. Last we present our calculation of above-threshold ionization (ATI) rate and compare it with a pertuba-tive calculation. The comparison shows that our nonperturbative calculation can also produce ATI peak suppression.

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Multiphoton Ionization of Atomic and Molecular Hydrogen at 0.53μ

Cited by 65 publications

References 15 publications

Laser-induced breakdown in nitrogen and the rare gases at 0.53 and 0.357μm

Laser-induced breakdown in nitrogen and the rare gases at 0.53 and 0.357μm

Measurement of intensity-dependent rates of above-threshold ionization (ATI) of atomic hydrogen at 248 nm

Computational Investigation of the Interaction Between Hydrogen Atoms and an Intense Circularly Polarized Laser Field

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