Vibration resistant initiator assembly having exploding foil initiator

An initiator assembly comprising:

• a housing assembly that defines a first cavity, a second cavity, and a structural wall that separates and provides a hermetic seal between adjacent ends of the first and second cavities;
• an exploding foil initiator received in the first cavity, the exploding foil initiator having a bridge, a flyer and a barrel, the flyer overlying the bridge and being disposed between the barrel and the bridge, the barrel defining a barrel aperture;
• an input charge received in the first cavity and disposed in-line with the barrel aperture, the input charge being formed of a secondary explosive;
• an output charge disposed in the second cavity and formed of a secondary explosive;
• wherein the input charge is configured to detonate in response to receipt of kinetic energy of the flyer during operation of the exploding foil initiator, and wherein energy released from detonation of the input charge penetrates the structural wall and initiates detonation of the output charge.