16.3: Ion‐Induced Secondary Electron Emission: A Comparative Study

Abstract

Ion-induced secondary electron emission coefficients for Ne, Ar, and Xe discharges are reproducibly determined using V-Q Lissajous figures. The comparison of measured and calculated Paschen curves results in ion-induced γ-coefficients for glass, MgO, CVD diamond, and phosphors. The measured γ-values correlate well with a simple model based on the ionization energy of the gas ion and the band gap and electron affinity of the solid.

On the possibility of positive-ion detection in gaseous TPCs and its potential use for neutrinoless double beta decay searches in 136Xe

“…The study compared between hydrogen-terminated CVD diamond (with negative electron affinity NEA) and oxygen-terminated CVD diamond (with positive electron affinity), showing much higher yields for the former. The NEA value reported is -0.8 eV [37], giving (for a band gap of 5.5 eV) a work function of 4.7 eV.…”

“…Several groups investigated the suitability of other dielectric layers as secondary electron emitters in the context of PDP development. In particular Bachmann et al [37,38] inferred secondary electron yields for hydrogen-terminated CVD diamond from discharge experiments with Ne, Ar and Xe, finding values of ~50%, ~20% and ~2%, respectively. The authors discuss the possibility that other processes (such as electron emission by UV photons) contribute to the measured yield, but conclude that it is dominated by ion-induced emission.…”

Characteristics of MgO layer deposited under hydrogen atmosphere

“…The firing voltage and coefficient of secondary electron emission were measured with the MgO layers formed under hydrogen atmospheres and compared with the MgO formed under vacuum atmosphere. The measurements were conducted using a set-up similar to that described in other works [10,11]. Figure 2 illustrates Lissajous curve along with the equation used to calculate the wall charge-corrected firing voltage V f .…”

Secondary electron emission and glow discharge properties of 12CaO·7Al2O3electride for fluorescent lamp applications

“…The discharge properties of C12A7 electride were studied using the apparatus shown in figure 7(a) [30,36,56]. It is possible to evaluate the discharge characteristics of the cathode material, under various pressures of discharge gas, without fabricating a lamp based on that material.…”