Electron swarm parameters in helium and neon

Abstract

Experimental values have been given for both the drift velocity and the ratio of longitudinal diffusion coefficient to mobility for electrons in helium (1.4<or=E/N<or=226 Td) and neon (1.4<or=E/N<or approximately=339 Td). Comparison has been made with a Monte Carlo computer simulation and a good fit has been obtained with the present and previously measured data. The simulation results for ionisation coefficient and ratio of radial diffusion coefficient to mobility have been compared with both experimental and other theoretical values over a wide range of E/N. A comparison between the mean swarm energy and the breakdown voltage has clearly shown that equilibrium conditions exist at the highest E/N (2260 Td for helium and 5600 Td for neon) for which the computations were carried out.

A Monte Carlo study of photoelectron extraction efficiency from CsI photocathodes into Xe–CH4 and Ne–CH4 mixtures

“…The calculations for Xe are shown together with the available experimental data in figure 2. Figure 3 [36,53,56] and [62,64,65], respectively. Similar good agreement was found in the case of CH 4 discussed in a previous paper [14].…”

Electron density and temperature of gas-temperature-dependent cryoplasma jet

“…The results of the calculations confirm previous experiments at room temperature. 26 Using this data, the N e and T e for the cryoplasma could be estimated. This estimation is valid for the plasma in the DBD part of our cryoplasma, with the exception of the relatively weak corona discharge at the tip of the wire, which can be neglected owing to its small size relative to the whole discharge.…”

Theory of Gas Discharge Plasma

“…The contributions P to consumption of the electron energy as a result of collisions with argon atoms depending on the electron energy [191] In considering the energy loss for a fast electron moved in an atomic gas note that the cross section of electron-atom elastic scattering exceeds that for inelastic collisions. But the factor m e /M for the mass ratio that is included in formula for the rate of energy loss, makes the elastic channel to be weak compared to inelastic channels at energies where inelastic collisions are effective.…”