Ion–Ion Recombination Total Cross Sections—Atomic Species

Olson, R. E.; Peterson, James R.; Moseley, J. T.

doi:10.1063/1.1674506

Cited by 135 publications

(47 citation statements)

References 20 publications

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“…In [17] the total cross section for process (A) was calculated as a sum of Landau-Zener cross sections for populating individual He * (1s, nlm) states and a good agreement with experimental results [16,17] was obtained. This direct summation does not take into account the competition between covalent states and overestimates the total cross section.…”

Section: Landau-zener Multiple-crossing Modelsupporting

confidence: 58%

“…At low velocities, where the trajectory is bent by Coulomb attraction, the translational factor is not essential (close to unity). The matrix elements Q 1,2 are calculated in the H − region and after the use of formula (17) we obtain…”

Section: The Translational Factormentioning

confidence: 99%

“…In this paper we investigate the cross section of the reaction H − + He + (1s) = H(1s) + He * (1s, nlm) (A) which was previously measured in [2,13,[15][16][17] and calculated in [12,17]. In the present work, the system H − + He + is treated as a three-electron system and the matrix elements for the population of the He * (1s, nlm) singlet and triplet states are derived.…”

Section: Introductionmentioning

confidence: 99%

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$ M$-strongly convex subsets and their generating sets

Balashov¹,

Половинкин²

2000

Sb. Math.

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The cross section for one-electron transfer H − + He + → H(1s) + He * (1s, nlm) is calculated in this paper. The collisional system is treated as a three-electron one and matrix elements for the formation of excited helium He * (1s, nlm) in both singlet and triplet states (1S, 2 1,3 S, P and 3 1,3 S, P, D) are obtained. Close-coupling calculations were done for the 27 1s, nlm| (1S, 2 1,3 S, P and 3 1,3 S, P, D) final states covering the range 1-10 × 10 7 cm s −1 of the relative collision velocity. An approximation is used for the effective potential of H − and Coulomb Green's functions are used to describe the weakly bound electron of H − . A satisfactory agreement is obtained with the experimental cross section.

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Section: Landau-zener Multiple-crossing Modelsupporting

confidence: 58%

Section: The Translational Factormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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$ M$-strongly convex subsets and their generating sets

Balashov¹,

Половинкин²

2000

Sb. Math.

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“…No data on the ion-ion recombination rates of H þ 5 or H þ 7 with O − 2 could be found. A variety of other ion rates are available, and are listed in Table V [ [72][73][74][75][76][77].…”

Section: Ion-ion Recombinationmentioning

confidence: 99%

Pressurized rf cavities in ionizing beams

Freemire

Tollestrup

Yonehara

et al. 2016

Phys. Rev. Accel. Beams

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A muon collider or Higgs factory requires significant reduction of the six dimensional emittance of the beam prior to acceleration. One method to accomplish this involves building a cooling channel using high pressure gas filled radio frequency cavities. The performance of such a cavity when subjected to an intense particle beam must be investigated before this technology can be validated. To this end, a high pressure gas filled radio frequency (rf) test cell was built and placed in a 400 MeV beam line from the Fermilab linac to study the plasma evolution and its effect on the cavity. Hydrogen, deuterium, helium and nitrogen gases were studied. Additionally, sulfur hexafluoride and dry air were used as dopants to aid in the removal of plasma electrons. Measurements were made using a variety of beam intensities, gas pressures, dopant concentrations, and cavity rf electric fields, both with and without a 3 T external solenoidal magnetic field. Energy dissipation per electron-ion pair, electron-ion recombination rates, ion-ion recombination rates, and electron attachment times to $SF_6$ and $O_2$ were measured.Comment: 15 p

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“…We have developed a numerical model to simulate the gas-phase reaction [38][39][40][41][42][43][44][45][46]. The numerical model comprises the simultaneous set of material balances for these nineteen species.…”

Section: Shown Inmentioning

confidence: 99%

Atmospheric-Pressure Plasma Cleaning of Contaminated Surfaces

Hicks¹,

Herrmann²

2003

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Ion–Ion Recombination Total Cross Sections—Atomic Species

Cited by 135 publications

References 20 publications

$ M$-strongly convex subsets and their generating sets

$ M$-strongly convex subsets and their generating sets

Pressurized rf cavities in ionizing beams

Atmospheric-Pressure Plasma Cleaning of Contaminated Surfaces

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