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Atom source and heater on thermally isolated die

A heat-insulating, atomic technology, applied to thermometers, instruments, measuring heat, etc. that use directly heat-sensitive electrical/magnetic components, can solve problems such as limited life, high vapor pressure, and undesired

Active Publication Date: 2019-05-28
HONEYWELL INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of such alkali metals in many atom-based sensor applications can lead to undesirably high vapor pressures in the sensing cavity
This high vapor pressure results in a large amount of background vapor that collides with the laser-cooled atoms and limits the lifetime of the atomic sample

Method used

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  • Atom source and heater on thermally isolated die
  • Atom source and heater on thermally isolated die
  • Atom source and heater on thermally isolated die

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0035] Example 1 includes a chip-scale atomic sensor comprising: a body defining at least one sensing cavity; a thermally insulating die mounted to the body, the thermally insulating die disposed in contact with the at least one sensing cavity In a position where the cavities communicate, the thermally insulating die includes: a base, which defines a frame portion and an insulating portion; a plurality of ties, which mechanically couple the insulating portion of the base to the frame portion; on the insulation; and a heating element on the insulation and configured to heat the source of atoms.

example 2

[0036] Example 2 includes the chip-scale atom sensor of Example 1, wherein the thermally insulated die includes a temperature sensor disposed on the insulation, the temperature sensor configured to sense a temperature proximate to the source of atoms, wherein the chip-scale atom sensor includes control electronics that Constructed to take temperature readings from the temperature sensor and control the heating element to maintain the temperature proximate the source of atoms at a temperature set point.

example 3

[0037] Example 3 includes the chip-scale atom sensor of Example 2, wherein the temperature sensor is a Wheatstone bridge.

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Abstract

The invention discloses an atom source and a heater on a heat insulating tube core. In one embodiment, a chip-scale atom sensor is provided. A chip-scale atom sensor includes a body defining at least one sensing cavity. The body includes a thermally insulating die mounted to the body. The thermally insulating die is disposed in position in communication with at least one sensing cavity. The thermally insulated die includes a base defining a frame portion and an insulating portion and a plurality of ties mechanically coupling the insulating portion of the base to the frame portion. The thermally isolated die also includes an atom source mounted on the insulating portion of the substrate and a heating element mounted on the insulating portion and configured to heat the atom source.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of priority of US Provisional Application No. 61 / 939,090, filed February 12, 2014, the disclosure of which is hereby incorporated by reference. Background technique [0003] Atom-based sensors, including atomic clocks and atomic inertial sensors, use an alkali metal source that releases alkali metal atoms to form an alkali vapor in the sensing cavity. One type of atom-based sensor is a laser cooled sensor. Laser-cooled atom-based sensors use one or more laser beams directed at the base vapor to cool an atomic sample of base atoms in the base vapor. [0004] The alkali metals rubidium (Rb) and cesium (Cs), commonly used in atom-based sensors, have melting points at or below 40°C and exponentially increasing vapor pressures. The use of such alkali metals in many atom-based sensor applications can lead to undesirably high vapor pressures in the sensing cavity. This high vapor pressure ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L11/02
CPCG04F5/145G01N21/6404G01N1/28G01K13/02G01K7/00H03B17/00
Inventor R.坎普顿
Owner HONEYWELL INT INC