Thermal Control System for the Investigation of Specific Absorption Rates forSpecimens Exposed to Electromagnetic Radiation

摘要

A thermal control system was developed to automatically maintain biological andchemical specimens at a controlled thermal profile during exposure to electromagnetic radiation to aid in the investigation of specific absorption rates. Hot and cold air supplies are mixed using mass flow control valves to generate an air source of controlled temperature at a constant mass flow rate. This air source is used to cool or heat the specimen which is within a low thermal-mass holder. By maintaining a constant mass flow rate for the air, the temperature difference between the input and exhaust air will directly indicate the heat energy removed/added to the specimen. A non-radiofrequency field perturbing temperature probe is inserted into the specimen to provide the temperature information to the controller.