640results about How to "Small temperature change" patented technology

A microchannel cooler containing a slurry having a particulate liquid / solid phase change material is provided balancing the interdependent factors of microencapsulated particle size with microchannel size and shape and flow conditions for the removal of high heat flux with low space and low power requirements.

Providing: quickly brining a vapor cell 119 to a desired temperature when retaining the heat of the vapor cell 119 to enhance the magnetic field detection performance of an optically pumped magnetometer; preventing adherence of atoms in the vapor cell 119 to a laser irradiation light passing-through part of the vapor cell 119; downsizing the periphery of the vapor cell 119; and suppressing the effect of a magnetic field from a heater used to retain the heat of the vapor cell 119. The present invention includes: a transparent film heater 118 provided to a laser irradiation light passing-through part of a vapor cell 119, the vapor cell 119 being a magnetic detection part of the optically pumped magnetometer; a temperature detector 115 provided at a center part of a side of the vapor cell 119; a temperature regulator 111 that sets a desired temperature for heat retention of the vapor cell 119 and compares the desired temperature and the actual temperature of the vapor cell measured by the temperature detector 115; an operation unit 112 that upon receipt of a PID control signal for temperature control from the temperature regulator 111, performs a temperature adjustment and switches on / off, in a pulsed manner, current applied to the transparent film heater 118 after the desired temperature is reached; and a heater power supply 113 that upon receipt of an operation signal from the operation unit 112, applies current to the transparent film heater 118.

A crystal oscillator of the present invention includes: a substrate provided in a package; a heating device arranged as surrounding an internal area of the substrate on at least one of the surfaces of the substrate; a crystal resonator or a crystal element and an oscillation circuit unit provided in an area enclosed by the heating device; a thermosensitive element which detects a temperature in an area enclosed by the heating device; and a control unit for controlling a heating value applied to the heating device based on a detection result of the thermosensitive element.

A garnet ferrite for a non-reciprocal circuit element expressed by the formula Y3-xGdxFet-2y-zCoySiyAlzO12 (where 0.2<=x<=1.5, 0.005<=y<=0.015, 0<=z<=1.5, 4.75<=t<=5) is provided. The absolute temperature coefficient alphaof 4piMs and the ferromagnetic resonance half-width DeltaH are low. In addition, an isolator is provided, wherein the isolator includes a magnetic assembly made up of a main body (the garnet ferrite element) and a plurality of center conductors disposed on the upper surface of the main body so that each of the center conductors intersect at a predetermined angle while being electrically insulated from each other, a magnet for applying a direct current magnetic field to the magnetic assembly, matching capacitors, and a yoke (upper and lower cases) for holding all the components. Loss is low in a high-frequency band, such as the microwave band.