In the non-isothermal gas flow through the electrodes of electrostatic accelerators, it is found that the accommodation of the gas temperature to the temperature of the electrode walls modify the density profile. The local gas density is, on turn, causing stripping losses and stray parti cle production. This document reports the activities carried out during 2015, dedicated to the numerical investigation of the gas-wall interaction at nanoscale, by molecular dynamics modelling of the particle- wall interaction. This report contains two annexes: a bachelor degree thesis (first annex), and a paper presented at the ICIS conference 201 5 (second annex).The calculated momentum and energy accommodation coefficients for the H 2 -Cu and D 2 -Cu systems are presented.
Modelling diatomic gas-wall interaction and accommodation coefficients for Negative Ion Sources and accelerators
Serianni G
2015
Abstract
In the non-isothermal gas flow through the electrodes of electrostatic accelerators, it is found that the accommodation of the gas temperature to the temperature of the electrode walls modify the density profile. The local gas density is, on turn, causing stripping losses and stray parti cle production. This document reports the activities carried out during 2015, dedicated to the numerical investigation of the gas-wall interaction at nanoscale, by molecular dynamics modelling of the particle- wall interaction. This report contains two annexes: a bachelor degree thesis (first annex), and a paper presented at the ICIS conference 201 5 (second annex).The calculated momentum and energy accommodation coefficients for the H 2 -Cu and D 2 -Cu systems are presented.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
