The objective of the activity is to allow Power Processing Unit (PPU) switch on as quickly as possible after spacecraft separation.
To avoid long drifts during mission phases (days).
High power units like PPUs have the risk of Corona at first start-up if the pressure is too high. Traditionally, such units are therefore only switched on after several days of depressurisation and outgassing. With full electric orbit raising, there is a need to start PPUs within a few hours after separation, in order to start the electric orbit raising as early as possible. The days of depressurisation and outgassing lead to a decay of the spacecraft's orbit while waiting for the operational requirements to be met for switching on the plasmic propulsion.
After choosing a EOR missions profile and a PPU existing design, it is proposed to define the conditions (temperature, pressure, etc.) required to switch-on the PPU as early as possible after separation, without Corona.
The proposed work logic is: