| 摘要 |
Temperature-sensing device including an emitter capsule containing a radioisotope fuel, a collector housing enclosing the emitter capsule, emitter capsule support means which produces a dominant thermal conduction loss in the heat balance of the device and which maintains the external emitter surface at a predetermined spacing from the internal collector surface, a cesium vapor source communicating with the interelectrode space, and emitter and collector connections providing an electrical output from the device. In this device, collector temperature is directly coupled to emitter temperature and allows determination of ambient (collector) temperature from emitter temperature which can be accurately derived from the device's output curve. Neutron-flux-sensing device is obtained by fueling the device with a material which undergoes an exothermic reaction under neutron bombardment. Heat produced is directly proportional to neutron flux present and is directly proportional to emitter temperature in a thermal conduction dominated device, for a given collector temperature. Thus, the neutron flux can be determined from the emitter temperature which can be derived from the device's output curve. Alternately, in this device or a device where the thermal conduction loss is not dominant, the neutron flux can be determined from the maximum power point of the output curve.
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