Thermal Conduction Mudule (tcm) With Stepped Or Tapered Piston Configuration
Original Publication Date: 1985-Mar-01
Included in the Prior Art Database: 2005-Feb-19
The pistons of a TCM each have the approximate shape of a golf tee with a wide diameter region at the end that contacts the chip and with a small diameter region at the end that is carried in a cylindrical opening in a hat and connects to a spring that holds the piston against a chip. Between these regions, the piston has cylindrical and frustroconical regions of differing diameters. As heat flows from the wide end of the piston, it is transferred to the hat across a gap that contains a thermally conductive fluid such as helium. The opening in the hat has a complementary shape so that this gap is small. This configuration matches the pattern of heat flux in the piston and in the hat. The piston is wide at the chip end where its heat flux is high and it is narrow at the end where its heat flux is low.