A Practical Fit Formula for Ionization Rate Coefficients of Atoms and Ions by Electron Impact:z= 1–28

Voronov, G. S.

doi:10.1006/adnd.1997.0732

Cited by 271 publications

(122 citation statements)

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“…This means that the steady-state temperature calculated from particle balance is independent of the plasma density. Using the particle balance equation and the ionization rate data for argon from [34], we calculated the temperature T e for the discharge and obtained that T e ≈ 7 eV. This theoretical result confirms our experimental estimates obtained with the Langmuir probe of T e ≈ 6.5 eV.…”

Section: Energy Cost Per Electron-ion Pair Createdsupporting

confidence: 84%

Characterization of the resonant electromagnetic mode in helicon discharges

Panevsky

Bengtson

2004

Physics of Plasmas

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This paper presents experimental evidence for the existence of a resonant electromagnetic mode in a helicon plasma, and characterizes its resonant frequency, energy absorption rate, and contribution to the overall power balance. An experimental method developed to detect and characterize the plasma impedance is introduced. Power flow analysis shows that the resonant electromagnetic mode is the dominant mechanism driving helicon plasma discharges in cylindrical geometry. The weakly damped wavefields are absorbed in a short distance, indicating that the wavefields may be trapped in a potential well created by a density gradient.

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Section: Energy Cost Per Electron-ion Pair Createdsupporting

confidence: 84%

Characterization of the resonant electromagnetic mode in helicon discharges

Panevsky

Bengtson

2004

Physics of Plasmas

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“…3 the present rates for ionization from the ground state (n ϭ 2) with the recommended data in Ref. [26]. It can be seen that our calculations agree well with those values, with differences of less than 5% for most electron temperatures and less than 10% for the remaining cases.…”

supporting

confidence: 85%

ELECTRON–ION COLLISIONAL IONIZATION CROSS SECTIONS AND RATES FOR THE Ne ISOELECTRONIC SEQUENCE

Chen

Teng

Yan

et al. 1998

Atomic Data and Nuclear Data Tables

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“…As is evident from (13), the set of Z + 1 equations (including charge state 0 for neutrals) forms a system of equations, which conserves the flux of the element Z. The rates for Maxwellian electron velocity distributions C i and R i are found in the work of Arnaud and Rothenflug (1985), Arnaud and Raymond (1992) and in Voronov (1997). 2 For the case of a weakly expanding plasma at high density, where a static equilibrium of charge states is maintained, one can infer so-called "freezing-in electron temperatures" T e , i.e., from couples of ionic abundances:…”

Section: Observations Of Charge Statesmentioning

confidence: 98%

Minor ions in the solar wind

Bochsler

2006

Astron Astrophys Rev

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Ions heavier than 4 He are treated as "minors" in the solar wind. This is justified for many applications since minor ions have no significant influence on the dynamics of the interplanetary plasma. However, minor ions carry information on many aspects of the formation, on the acceleration and on the transfer of solar plasma from the corona into the interplanetary space. This review concentrates on various aspects of minor ions as diagnostic tracers. The elemental abundance patterns of the solar wind are shaped in the chromosphere and in the lower transition region by processes, which are not fully understood at this moment. Despite this lack of detailed understanding, observed abundance patterns have been classified and are now commonly used to characterize the sources, and to trace back solar-wind flows to their origins in the solar atmosphere. Furthermore, the solar wind is the most important source of information for solar isotopic abundances and for solar abundances of volatile elements. In order to fully exploit this information, a comprehensive understanding of elemental and isotopic fractionation processes is required. We provide observational clues to distinguish different processes at work.

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A Practical Fit Formula for Ionization Rate Coefficients of Atoms and Ions by Electron Impact:z= 1–28

Cited by 271 publications

References 0 publications

Characterization of the resonant electromagnetic mode in helicon discharges

Characterization of the resonant electromagnetic mode in helicon discharges

ELECTRON–ION COLLISIONAL IONIZATION CROSS SECTIONS AND RATES FOR THE Ne ISOELECTRONIC SEQUENCE

Minor ions in the solar wind

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