SMall Aspect Ratio Toroidal Experiments in a C-shaped trap (SMARTEX-C) attempts to confine electrons in a toroidal trap using static electric and magnetic field. Confinement of these electrons is largely limited by charge losses due to the presence of background neutrals and by short pulsed magnetic field. Ions formed due to electron impact ionization of background neutrals lead to instabilities that are ultimately observed to limit the confinement. Lowering the amount of neutrals in the trap is therefore of paramount importance. In SMARTEX-C, prior to electron injection, the trap is pumped down to base pressures of the order of 2 ± 1 x 10-8 mbar. However, as one turns on the electron source (tungsten _lament emitting thermionically) pressure in the system increases to ~1 x 10-7 mbar. Partial pressure analysis of the vacuum system indicates predominant presence of H2 during _lament operation. Replacing the copper current-leads for electron source with stainless steel-304 led to reduction of H2 outgassing. Additionally, viton seals have been replaced with Aluminum wire-seals that allow baking at elevated temperatures and further reduce out-gassing. All these measures have led to an improvement in the base pressure to 7±1 x 10-9 mbar even during filament operation. Confinement of electron plasmas in the trap has thus significantly improved.