Abstract: A low cost, sealed contactor comprises a hermetically sealed housing with a flat header having internal components for changing the state of said contactor. Terminals are electrically connected to the internal components for connection to internal circuitry and applying an electrical signal to control the state of the contactor. A solenoid-driven plunger with a hollow shaft is included. Power-reducing electronics located within the hermetically sealed housing are also included. Two contact springs are also included to improve electrical performance. O-rings are added to help seal the contactor and keep it hermetically sealed.

Abstract: A cryogenic receiver front-end includes a heat sink having a mounting surface and a plurality of fins, a cryocooler mounted to the mounting surface of the heat sink, a heat rejector surrounding the cryocooler, the heat rejector including a plurality of pliable c-shaped recesses therein, and a plurality of heat pipes. Each heat pipe has first and second ends, the first ends of the plurality of heat pipes are disposed in respective c-shaped recesses of the heat rejector. A working fluid is contained inside the heat pipes. The second ends of the plurality of heat pipes are thermally coupled to the heat sink. A weather resistant enclosure unit is mounted to the heat sink and encloses the components of the cryogenic receiver front-end.