Intense ultrashort laser–Xe cluster interaction

Davis, J.; Whitney, K. G.; Petrova, Tz. B.; Petrov, G. M.

doi:10.1016/j.hedp.2012.03.006

Cited by 5 publications

(5 citation statements)

References 36 publications

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“…A model, recently constructed to analyze the femtosecond cluster dynamics behind these amplifications [8,9], assumed that the n=2 hole states were generated by photoionizations.…”

Section: Discussionmentioning

confidence: 99%

“…[2] was first extended (η 0 ∼ 0.1) and then extrapolated (η 0 → 1) to higher laser harmonics of relevance to the calculation of the photoionization rates employed in Refs. [8][9][10]. By virtue of their dependence on Bessel functions, these high laser harmonic bremsstrahlung emissions were found to require laser intensities: > ∼ 10…”

Section: Discussionmentioning

confidence: 99%

“…A theoretical model of a xenon cluster's early-time dynamics was recently constructed [8][9][10] in an effort to determine the mechanism by which such n=3 to n=2 x-ray amplifica- tions could be generated. In this model, a molecular dynamics calculation of the cluster's early-time expansion and heating was combined with a detailed description of the cluster's ionization dynamics both in response to the same intense laser field.…”

Section: And From Figs 3 and 4 (Mmentioning

confidence: 99%

“…The combined molecular and ionization dynamics model described in Refs. [9,10] is employed to make this demonstration.…”

Section: Introductionmentioning

confidence: 99%

“…The combined molecular/ionization dynamic model of Refs. [9,10] is used in this section to compute the dynamical response of a xenon cluster of 200 atoms to an intense pulse of KrF laser radiation that is taken to peak at an intensity of 2 × 10 19 W/cm 2 , which is comparable to the intensities achieved in the experiments of Ref. [7].…”

Section: Introductionmentioning

confidence: 99%

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Laser-intensity requirements for generating enhanced kilovolt bremsstrahlung emission in intense laser-cluster interactions

Whitney¹,

Davis

Petrova

et al. 2012

Phys. Rev. A

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The effects of ultra high intensity laser radiation on dynamical processes such as electron scattering, bremsstrahlung emission, pair production, etc. have recieved growing theoretical interest as laser intensities in the laboratory continue to increase. Recently, for example, a calculation was published that predicted more than four orders of magnitude resonant increases in bremsstrahlung emission in the presence of intense optical laser radiation [A. A. Lebed and S. P. Roshchupkin, Phys. Rev. A, 81, 033413 (2010)]. The analysis in this paper was limited to laser intensities ≤ 10 17 W/cm 2 , and it was applied only to bremsstrahlung emissions at the laser frequency. In the present paper, we extend this Lebed and Roshchupkin analysis in order to assess the possibility of achieving some enhancement to bremsstrahlung emissions at significantly higher harmonics of the optical laser photon energies (∼ 6 keV) and thereby to appraise whether or not enhanced extensions of these calculations (or experimental measusurements) are needed to detemine whether the enhancement factors that are predicted for small laser harmonics at laser intensities < ∼ 10 17

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“…A model, recently constructed to analyze the femtosecond cluster dynamics behind these amplifications [8,9], assumed that the n=2 hole states were generated by photoionizations.…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: And From Figs 3 and 4 (Mmentioning

confidence: 99%

“…The combined molecular and ionization dynamics model described in Refs. [9,10] is employed to make this demonstration.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Laser-intensity requirements for generating enhanced kilovolt bremsstrahlung emission in intense laser-cluster interactions

Whitney¹,

Davis

Petrova

et al. 2012

Phys. Rev. A

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A New Approach to Theory for the Rhodes Group Experiments with Channeled Pulse Excitation in Xe and Kr Clusters

Hagelstein

Chaudhary

2015

Springer Proceedings in Physics

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Ionization dynamics and radiative behavior of a betatron driven gold atom

2014

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The study of inner-shell transitions induced by an intense (>1019 W/cm2) ultrashort (∼5 fs) x-ray pulse provides a challenging opportunity to investigate the behavior and dynamics of hollow atoms and to explore the feasibility of creating population inversions in some of the inner-shell states that may lead to a variety of amplifications and gains in the x-ray regime. In this paper, we investigate the interaction through inner-shell photoionizations of a spectrally broad femtosecond pulse of betatron x-ray radiation incident on a gold atom. The level populations of Pt-like Au and Ir-like Au are described by non-(local thermodynamic equilibrium) inner-shell dynamics and compared and contrasted with the level populations created by a "single" frequency x-ray laser pulse. Gain coefficients for a variety of transitions are calculated. It is found that long wavelength x-rays must be filtered from the betatron spectrum before any population inversions can be generated.

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Intense ultrashort laser–Xe cluster interaction

Cited by 5 publications

References 36 publications

Laser-intensity requirements for generating enhanced kilovolt bremsstrahlung emission in intense laser-cluster interactions

Laser-intensity requirements for generating enhanced kilovolt bremsstrahlung emission in intense laser-cluster interactions

A New Approach to Theory for the Rhodes Group Experiments with Channeled Pulse Excitation in Xe and Kr Clusters

Ionization dynamics and radiative behavior of a betatron driven gold atom

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