Abstract: Cryocooler health monitoring systems and methods are provided. In one example, a method includes determining, for each setpoint temperature of a plurality of setpoint temperatures, a respective power applied to a cryocooler to set a cold tip of the cryocooler to the setpoint temperature. The method further includes determining a first load line associated with the cold tip based on the plurality of setpoint temperatures and the respective powers applied to the cryocooler. The method further includes determining a health metric associated with the cold tip based on the first load line and a reference load line associated with the cryocooler. Related devices and systems are also provided.

Abstract: Cryocooler health monitoring systems and methods are provided. In one example, a method includes determining, for each setpoint temperature of a plurality of setpoint temperatures, a respective power applied to a cryocooler to set a cold tip of the cryocooler to the setpoint temperature. The method further includes determining a first load line associated with the cold tip based on the plurality of setpoint temperatures and the respective powers applied to the cryocooler. The method further includes determining a health metric associated with the cold tip based on the first load line and a reference load line associated with the cryocooler. Related devices and systems are also provided.

Abstract: A cryocooler is disclosed. The cryocooler may include a magnetic spring, a regenerator/displacer, a working fluid, and a cold finger configured to contain the working fluid in a closed system, and to contain the regenerator/displacer that is configured to travel linearly within the cold finger. The magnetic spring may provide a force to cause the regenerator/displacer to return to a center position during thermal cycle operation of the cryocooler. Additional systems and related methods are also provided.

Abstract: An expansion joint bracket retains an expansion joint board in a concrete installation. The expansion joint bracket may include a base member having multiple nail holes for securing the bracket to the earth (or sand or gravel put down prior to pouring concrete there upon). First and second board support members may run perpendicular to the base and parallel to each other to hold the expansion joint board in place. Gussets, typically triangular shaped gussets, extend from the board support members to the base member. The expansion joint brackets may be disposed every 12-24 inches on the expansion joint board and concrete may be poured over the expansion joint brackets, resulting in a quick and simple concrete installation.

Abstract: An expansion joint bracket retains an expansion joint board in a concrete installation. The expansion joint bracket may include a base member having multiple nail holes for securing the bracket to the earth (or sand or gravel put down prior to pouring concrete there upon). First and second board support members may run perpendicular to the base and parallel to each other to hold the expansion joint board in place. Gussets, typically triangular shaped gussets, extend from the board support members to the base member. The expansion joint brackets may be disposed every 12-24 inches on the expansion joint board and concrete may be poured over the expansion joint brackets, resulting in a quick and simple concrete installation.