Precision Measurements of Electron Transport Coefficients

Elford, M. T.

doi:10.1016/b978-0-7204-0225-4.50005-9

Cited by 6 publications

(3 citation statements)

References 91 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ion mobilities were measured by the Bradbury-Nielsen technique, using a static-gas drift tube (drift distance 10 cm), immersed in either a water (294 K) or a liquid nitrogen bath. The apparatus and the experimental technique have been reported in detail earlier (Elford 1972), and we just note here that the 'measured mobilities' were derived from the measured mean arrival times t by inserting in equation ( 1) the value d/ t for the drift velocity, where d is the drift length.…”

Section: Methodsmentioning

confidence: 99%

The mobility of potassium ions in helium

Skullerud

Elford

Røeggen

1996

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

View full text Add to dashboard Cite

The mobility of ions in helium has been measured at 76.8 K and E/N values up to 15 Td, and at room temperature up to 300 Td. The experimental scatter is of the order of 0.1 - 0.2%. The experimental mobilities are compared with values calculated from a new and accurate ab initio potential (Røeggen et al 1996). The agreement between experimental and theoretical values is significantly better than in earlier studies of this ion - atom system, but some unexplained discrepancies of the order of 1% still exist.

show abstract

Section: Methodsmentioning

confidence: 99%

The mobility of potassium ions in helium

Skullerud

Elford

Røeggen

1996

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

View full text Add to dashboard Cite

show abstract

“…The heydays of swarm experiments were described well in numerous reviews, in particular (Elford 1972, Huxley and Crompton 1974, Christophorou and Hunter 1984. The common characteristics of low energy swarm experiments (i.e.…”

Section: Current Status Of Swarm Experimentsmentioning

confidence: 99%

Measurement and interpretation of swarm parameters and their application in plasma modelling

Petrović¹,

Dujko²,

Marić³

et al. 2009

J. Phys. D: Appl. Phys.

220

208

View full text Add to dashboard Cite

In this review paper, we discuss the current status of the physics of charged particle swarms, mainly electrons, having plasma modelling in mind. The measurements of the swarm coefficients and the availability of the data are briefly discussed. We try to give a summary of the past ten years and cite the main reviews and databases, which store the majority of the earlier work. The need for reinitiating the swarm experiments and where and how those would be useful is pointed out. We also add some guidance on how to find information on ions and fast neutrals. Most space is devoted to interpretation of transport data, analysis of kinetic phenomena, and accuracy of calculation and proper use of transport data in plasma models. We have tried to show which aspects of kinetic theory developed for swarm physics and which segments of data would be important for further improvement of plasma models. Finally, several examples are given where actual models are mostly based on the physics of swarms and those include Townsend discharges, afterglows, breakdown and some atmospheric phenomena. Finally we stress that, while complex, some of the results from the kinetic theory of swarms and the related phenomenology must be used either to test the plasma models or even to bring in new physics or higher accuracy and reliability to the models.

show abstract

“…Ion mobilities were measured by the Bradbury-Nielsen technique, using a static-gas drift tube with a drift distance of 10 cm, immersed in either a water (295 K) or a liquid nitrogen bath. The apparatus and experimental technique were reported in detail earlier (Elford 1972), and were the same as used in a recent and similar investigation on K + ions in He (Skullerud et al 1996).…”

Section: Mobility Measurementsmentioning

confidence: 99%

Interaction potential and transport coefficients for Li⁺ions in helium

Elford¹,

Røeggen²,

Skullerud³

1999

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

View full text Add to dashboard Cite

An extended group function model has been applied to determine the interatomic potential for the X state of HeLi+, to an accuracy superior to previously determined potentials. The potential has been used to calculate transport coefficients for Li+ ions in He at 77.5 and 295 K, and new precision measurements of the mobility as a function of E/N have been performed at these temperatures. The agreement between the theoretical and experimental mobility values is excellent, and well within the experimental scatter.

show abstract

Precision Measurements of Electron Transport Coefficients

Cited by 6 publications

References 91 publications

The mobility of potassium ions in helium

The mobility of potassium ions in helium

Measurement and interpretation of swarm parameters and their application in plasma modelling

Interaction potential and transport coefficients for Li⁺ions in helium

Contact Info

Product

Resources

About

Precision Measurements of Electron Transport Coefficients

Cited by 6 publications

References 91 publications

The mobility of potassium ions in helium

The mobility of potassium ions in helium

Measurement and interpretation of swarm parameters and their application in plasma modelling

Interaction potential and transport coefficients for Li+ions in helium

Contact Info

Product

Resources

About

Interaction potential and transport coefficients for Li⁺ions in helium