Cryogenic heating system
| DWPI Title: Cryogenic heating system for non-contact heating and cooling of test sample, has thermocouple which is configured to measure temperature within inner cavity of cryostage, and inputs for two controllers that are provided by thermocouple |
| Abstract: The present invention relates to a cryogenic heating system including a plurality of stages to provide accurate temperature control. The system can be used to provide non-contact heating and cooling of a test sample by use of an inert fluid. Accurate temperature control can be maintained, e.g., by use of controllers to provide temperature feedback control. |
| Use: Cryogenic heating system for providing non-contact heating and cooling of test sample by use of inert fluid such as liquid nitrogen or helium. |
| Advantage: The connections are insulated to minimize the heat loss or gain of the inert fluid. Accurate temperature control is maintained by employing control boxes with feedback loops connect to each heater in each stage. An optional thermocouple is positioned at an outlet that provides accurate temperature measurements. Switching at high currents are facilitated by the PID control algorithm with enhanced accuracy. |
| Novelty: The system (100) has first and second control boxes (103) which are electrically connected to each of the heaters in the first and second stage, respectively. The first and second control box comprises an input of first and second proportional-integral-derivative controller comprises channels. The channel is connected to a separate channel of a solid state relay. Each separate channel of the solid state relay is electrically connected to each of the heaters in the second stage. A cryostage (107) comprises an inner cavity is configured to maintain a sample (108). The cryostage is in fluidic communication with the second stage, by allowing the r heated inert fluid to heat or cool the sample within the inner cavity. A thermocouple is configured to measure a temperature within the inner cavity of the cryostage. The inputs for the first and second controller are provided by the thermocouple. |
| Filed: 7/25/2017 |
| Application Number: US15659477A |
| Tech ID: SD 13690.1 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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