Pressure and Electron Density Dependence of the Electron-Ion Recombination Coefficient in Helium

Berlande, J.; Chéret, M.; Deloche, R.; Gonfalone, A.; Manus, C.

doi:10.1103/physreva.1.887

Cited by 57 publications

(18 citation statements)

References 13 publications

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“…Although they introduced a TMAE seed gas under atmospheric-pressure helium conditions, the three-body recombination effect is small, where the total recombination coefficient ␣ total ϭ␣ two-body ϩ␤ three-body ϫn atom . Pitaevskii's formula 11 predicts that the three-body recombination coefficient ␤ for eϩTMAE ϩ ϩHe is close to that for e ϩHe 2 ϩ ϩHe, which is known to be ␤ϭ2ϫ10 Ϫ27 cm 6 /s at 300 K. 12 For atmospheric pressure (n atom Ϸ2.7 ϫ10 19 cm…”

Section: Resultsmentioning

confidence: 99%

Effects of rapidly decaying plasmas on Langmuir probe measurements

Ding

Scharer

Kelly

1998

Journal of Applied Physics

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Sheath motion, displacement current, and probe edge effects on temporal Langmuir probe ͑LP͒ ion saturation current measurements are investigated for a pulsed laser produced plasma during the period 100 ns→1000 ns after the turn on of the laser pulse. The plasma has a large volume ͑hundreds of cm 3 ͒ and a high initial plasma density (n e Ͼ10 13 cm Ϫ3). The sheath motion and edge effects are found to be very important, but the displacement current is found to be very small. We present both a quantitative correction for the effects of rapidly decaying plasmas on LP ion saturation current measurements and a validity condition for this method. The results are compared with the densities predicted from electron saturation currents, and the former are р30% lower than the latter. The corrected probe measurements are utilized to determine the plasma recombination coefficient. It is found to be in good agreement with the results obtained by Stalder and Eckstrom ͓J. Appl. Phys. 72, 3917 ͑1992͔͒ who utilized a microwave method.

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Section: Resultsmentioning

confidence: 99%

Effects of rapidly decaying plasmas on Langmuir probe measurements

Ding

Scharer

Kelly

1998

Journal of Applied Physics

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“…The analysis techniques are dominated by microwave probing and optical spectroscopy, and the measurements are almost exclusively at pressures less than 100 Torr. Three groups9.10.16 however managed to estimate the independent contributions of two-and three-body recombination, although a factor of 10 separates the determinations of the three-body rate of Berlande et al 9 and Johnson et af. 10 The three-body recombination coefficients measured by these workers are listed in Table II.…”

Section: A Previous Measurements Of Rates In Heliummentioning

confidence: 98%

Pulse radiolysis studies of ion–electron recombination in helium. Pressure and temperature effects

Sonsbeek

Cooper

Bhave

1992

The Journal of Chemical Physics

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Using pulse radiolysis techniques, rates of recombination of electrons with Het ions in the presence of helium over a wide pressure range (40-900 Torr) and at temperatures of 200, 235, 275, and 295 K were measured. Two-and three-body recombination processes were resolved, and a temperature dependence for the three-body recombination rate constant of T(;;;.2.9± 1.2) observed. This result agrees well with theoretical predictions of a temperature expo~ent of -2.5 by Bates and Khare and Pitaevskii, and remarkably well with recent work by Cao and Johnsen which gave a temperature exponent of -2.9 for the rate constant for three-body recombination of electrons with simple molecular ions in the presence of helium.

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“…Previous experimental studies have been carried out mostly at higher electron temperatures (1000 -4000 K, see compilation in [4]) and in only few cases also at 300 K [7][8][9][10]. It is not obvious, that the Stevefelt formula holds also at low temperatures (below 300 K).…”

Section: Introductionmentioning

confidence: 99%

Cryo-FALP study of collisional-radiative recombination of Ar⁺ions at 40–200 K

Dohnal

Rubovič

Plašil

et al. 2011

Eur. Phys. J. Appl. Phys.

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Abstract. New flowing afterglow apparatus, Cryo-FALP, was built to study ternary Collisional Radiative Recombination (CRR) of Ar + ions with electrons in He/Ar afterglow plasma at temperatures 40 -200 K. The obtained ternary recombination rate coefficient at 57 K is KCRR = (3±1)×10 −17 cm 6 s −1 . It is the first time that the KCRR was measured below 77 K. The measured temperature dependence KCRR ∼ T (−4.5±0.4) is in a good agreement with theoretical prediction.

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Pressure and Electron Density Dependence of the Electron-Ion Recombination Coefficient in Helium

Cited by 57 publications

References 13 publications

Effects of rapidly decaying plasmas on Langmuir probe measurements

Effects of rapidly decaying plasmas on Langmuir probe measurements

Pulse radiolysis studies of ion–electron recombination in helium. Pressure and temperature effects

Cryo-FALP study of collisional-radiative recombination of Ar⁺ions at 40–200 K

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Pressure and Electron Density Dependence of the Electron-Ion Recombination Coefficient in Helium

Cited by 57 publications

References 13 publications

Effects of rapidly decaying plasmas on Langmuir probe measurements

Effects of rapidly decaying plasmas on Langmuir probe measurements

Pulse radiolysis studies of ion–electron recombination in helium. Pressure and temperature effects

Cryo-FALP study of collisional-radiative recombination of Ar+ions at 40–200 K

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Cryo-FALP study of collisional-radiative recombination of Ar⁺ions at 40–200 K