The Measurement of Electron Drift Velocities

Abstract

Several methods (Loeb 1955;Breare and von Engel 1964;Raether 1964) have been devised to measure the drift velocity W of electrons moving under the influence of an electric field E through a gas at pressure p. The most accurate method is that of Bradbury and Nielsen (1936) (see also Lowke 1963), but for reasons discussed below this technique has been limited to low values of E/p. We have found that the useful range of this method can be greatly extended by some modification to the conventional form of the apparatus.

Neutrino experiments at high energies

“…The values of F V as a function of (E/N) are shown in figure 5, along with the previous determinations of Blevin and Hasan (1967), Prasad and Smeaton (1967) and Lowke (1963). It is evident that the present values fall below those of Blevin and Hasan by from 1 % at E/N =46 Td and 183 Td to 6 % at E/N = 61 Td.…”

Energy Dispersive Near Edge X-Ray Absorption Fine Structure in the Soft X-Ray Region: A New Technique to Investigate Surface Reactions

“…Those results are included in figure 4. Also included in figure 4 are the results of Blevin and Hazan (1967) which are seen to lie about 6.5 % higher than the present values. The major error in the present data is caused by the inability of the apparatus to measure the time of the peak of the distribution to better than 10 ns which in an elapsed time of typically 500 ns is 2 %.…”

“…Further possible error's in measurement of axial distance travelled by the swarm, and in the gas pressure measurement add a further 2 % to the possible error in WT. Since the correction term involved in converting Wnl to WT is only of low magnitude, Blevin and Hazan's (1967) results.…”

Drift velocities and characteristic energies of electrons in deuterium at low and moderate E/N

“…The double grid Bradbury-Nielsen system was used for the drift velocity measurements Crompton 1974, Blevin andHasan 1967). Drift distance between the shutters was 10.97 cm.…”