Cryo-harness shielding effectiveness assessment for ARIEL mission of the ESA’s Cosmic Vision Program

A simulation campaign has been carried out to assess the shielding effectiveness for the ARIEL mission. The analysis focuses particularly on the most sensitive cryo-cables, located outside the payload and the service module cavity. For all the instrument cable sets, conducted and radiated susceptibility analyses have been performed, including the evaluation of the transfer impedance (Zₜ). Time-domain analyses are also included to test the harness impulsive susceptibility and its response to transients. Special attention is given to the number of bonding connections and the maximum allowable resistance to the spacecraft reference ground. The simulation campaign has been performed using numerical electromagnetic analysis tools based on the Finite Element Method and Transmission Line Theory. The outcome of this study will be used to define appropriate reference requirements for the payload, ensuring that the harness design meets the necessary EM compatibility and performance.