Localisation of deposited filling gases (CO2) in cryogenic thermal insulation materials using neutron radiography

► Deposited gases (CO2) are investigated by neutron radiography within a thermal insulation. ► This is of great interest for the technique of deposition-evacuation (cryoevacuation). ► Measurements reveal that all CO2 is deposited preferentially at and close to the cold wall. ► The form of the CO2-distribution is unaffected by the total amount of CO2 injected.