Measurement of electron attachment processes in a high-temperature plasma

Kinetics of associative detachment of O− + N2 and dissociative attachment of e− + N2O up to 1300 K: chemistry relevant to modeling of transient luminous events

“…43 Literature results at lower temperatures 14 are in excellent agreement with the model, while those at higher temperatures 13 are consistent, although with large apparent uncertainty. Not shown is the data of Mullen et al 15 at still higher temperatures, which are in modest agreement, but carry very large uncertainty. Experimentally derived and calculated equilibrium constants between reactions (1) and ( 2) are shown in Table 1.…”

“…A second study by Moruzzi and co-workers with a distinct drift tube apparatus reported a consistent result at low field strength, approximating a room temperature rate constant of 3 Â 10 À13 cm 3 s À1 , as well as an upper limit of 3 Â 10 À11 cm 3 s À1 for reaction with N 2 (v = 1). 10 We are unaware of relevant studies more recent than 1982; however, there are several studies of the reverse process, [11][12][13][14][15] dissociative attachment to N 2 O N 2 O + e À -O À + N 2 .…”

“…We are unaware of relevant studies more recent than 1982; however, there are several studies of the reverse process, 11–15 dissociative attachment to N 2 ON 2 O + e − → O − + N 2 .…”

Excitation of oxygen permitted line emissions by SF6 injection into the F region

“…At room temperature the cross section for F-production exceeds the cross section for SFs production only for electron energies above 2.5 eV [Kline et al, 1979]. For SF 6 at temperatures of 2000-3000 K the predominant negative ion is F-, and the attachment rate has dropped to 2.8 x 10-•o ½m3/s [Mullen et al, 1971]. Typical variation in thermospheric neutral temperatures ranging from 600 K to 2000 K will produce large variations in the F-/SFs ratio.…”

Processus de formation de plasmas sans électron

“…Creation d'un plasma form6 d'ions de masse 6gale, et de composition d6finie. -Les plasmas sans electron ont 6t6 consid6r6s pour leurs applications 6ventuelles dans le probleme de propagation des ondes [7,8]. La masse reduite, qui intervient dans 1'expression de la frequence plasma, n'est plus la masse de 1'electron comme dans un plasma conventionnel, mais devient comparable aux masses ioniques.…”