Electron impact ionization of neon and argon

Fletcher, John; Cowling, I R

doi:10.1088/0022-3700/6/9/010

Cited by 38 publications

(11 citation statements)

References 10 publications

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“…We also cite MSB [7] and Nagy, Skutlartz, and Schmidt [22] for obtaining energydependent shapes for partial cross sections that are consistent with the results cited above. Other investigators have obtained good agreement with these studies for the rare gases, but not over an extensive range of energy and ion charge [9,10,35,36]. We limit our comparison to what we judge to be the most extensive and reliable mea- up to a factor of 2 [3 -7].…”

Section: Estimation Of Errorsmentioning

confidence: 92%

Electron-impact cross sections for multiple ionization of Kr and Xe

Syage

1992

Phys. Rev. A

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Partial cross sections were measured for the ionization M+e~M"++(n+1)e for M=Kr and Xe (n = 1 -6) as a function of electron energy (0-470 eV). The experiment is based on a crossed-beam timeof-flight mass spectrometer employing pulsed electron and atomic beams, and pulsed ion extraction.Cross sections for Kr'+, Kr +, and Xe + have not been previously measured over this energy range. The cross sections reported for the remaining ions considerably narrow the uncertainty of previous measurements. The source of discrepancy among recent work appears to be due to improper account of detector-gain effects. The ionization onsets are fitted to threshold power-law expressions to derive ionization potentials.PACS number(s): 34.80.Dp, 35.10.Hn

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Section: Estimation Of Errorsmentioning

confidence: 92%

Electron-impact cross sections for multiple ionization of Kr and Xe

Syage

1992

Phys. Rev. A

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“…3(c), the cross sections of elastic scattering and impact ionization are close to the geometrical cross section of the atom. As an example, the impact ionization cross section of neutral argon does not exceed the value of σ max ≈ 3 • 10 −16 cm 2 [56]. Taking for an estimate the concentration of neutral atoms survived after the field ionization equal to n a 10 18 cm −3 and the same for the concentration of electrons, we obtain that impact ionization can increase the concentration of electrons by σ max n a v 0 τ ≈ 0.1 of its initial value during the time interval τ = 1ps.…”

Section: Collective Dynamics Of the Electron Plasma And Radiationmentioning

confidence: 94%

Boosting terahertz-radiation power with two-color circularly polarized midinfrared laser pulses

et al. 2018

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A way to considerably enhance terahertz radiation, emitted in the interaction of intense mid-infrared laser pulses with atomic gases, in both the total energy and the electric-field amplitude is suggested. The scheme is based on the application of a two-color field consisting of a strong circularly polarized mid-infrared pulse with wavelengths of 1.6 ÷ 4 µm and its linearly or circularly polarized second harmonic of lower intensity. By combining the strong-field approximation for the ionization of a single atom with particle-in-cell simulations of the collective dynamics of the generated plasma it is shown that the application of such two-color circularly polarized laser pulses may lead to an order-of-magnitude increase in the energy emitted in the terahertz frequency domain as well as in a considerable enhancement in the maximal electric field of the terahertz pulse. Our results support recently reported experimental and numerical findings. arXiv:1810.08834v1 [physics.atom-ph]

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“…After careful calibrations of the target-gas pressure and temperature as well as collection length Kurepa et a1 (1974) measured the cross sections for Ar from 19 to 200 eV and found them to be in close agreement with those of Rapp and Englander-Golden (1965), thus concluding that the experiments which employed the McLeod gauge suffered from the systematic error in pressure measurement unless corrected properly. Unfortunately both the measurements by Fletcher and Cowling (1973) and Kurepa et a1 (1974) which support the measurements of Rapp and Englander-Golden (1965) were not carried out for all the rare-gas species, and in a wider range of energies. The recent results of Montague et a1 (1984) on helium using a fast-atom-beam technique are in very good agreement with those of Rapp and Englander-Golden.…”

Section: Introductionmentioning

confidence: 92%

Ionisation cross sections of rare-gas atoms by electron impact

Krishnakumar

Srivastava

1988

J. Phys. B: At. Mol. Opt. Phys.

276

261

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Normalised values of partial ionisation cross sections for the rare gases (He+, Ne+-Ne3+, Ar+-Ar3+, Kr+-Kr4+ and Xef-Xe5+) have been measured from threshold to 1000 eV using a pulsed electron beam and ion extraction technique. The cross sections have been obtained for the singly ionised species by normalising the relative data with the results of Rapp and Englander-Golden below the onset of production of the doubly ionised species. These cross sections for the singly ionised species have then been used to calibrate the mass transmission efficiency of the ion extraction + analyser+ detection system by the relative flow technique. The mass transmission curve thus obtained has been employed to determine the absolute cross sections of the multiply ionised species. Summation of the individual partial cross sections with proper weighting for charge is employed to obtain the total ion cross sections. The measured partial cross sections are fitted to an empirical formula for the ease of future use.

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Electron impact ionization of neon and argon

Cited by 38 publications

References 10 publications

Electron-impact cross sections for multiple ionization of Kr and Xe

Electron-impact cross sections for multiple ionization of Kr and Xe

Boosting terahertz-radiation power with two-color circularly polarized midinfrared laser pulses

Ionisation cross sections of rare-gas atoms by electron impact

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