Getter Pump Vacuum System for Fabry-Perot Cavity Portability
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Solution Overview
Problem
Ultra-stable laser systems face portability and operational constraints due to the continuous power requirement of ion pumps needed to maintain vacuum pressures for high precision applications, limiting their use in remote or resource-restricted environments.
Innovation Solution
Incorporating a getter pump, such as a non-evaporable getter (NEG) pump, which maintains stable vacuum pressures without the need for continuous power, allowing for passive pumping and extended ion pump lifetime, enabling portability and operation in varied environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ion pumps are used to maintain vacuum pressure, then vacuum pressure stability is improved, but portability deteriorates due to continuous power requirement
Solution Approach 1:
The patent combines ion pumps with getter pumps to create a hybrid vacuum system. The ion pump provides active pumping for initial vacuum achievement and pressure maintenance, while the getter pump provides passive pumping capability that maintains vacuum during power outages. This merging allows the system to achieve both reliable vacuum pressure stability and improved portability by eliminating the absolute requirement for continuous power.
Solution Approach 2:
The getter pump component operates passively without requiring external power, using its own material properties (gettering materials that chemically bind residual gases) to maintain vacuum pressure. This self-service capability allows the system to maintain vacuum during power outages or transport, significantly improving portability while the ion pump handles active pumping when powered.
2Reliability
If ion pumps are operated continuously to maintain vacuum, then vacuum pressure is maintained, but device lifetime deteriorates due to operational wear
Solution Approach 1:
The hybrid system allows the ion pump to operate periodically rather than continuously. The getter pump provides continuous passive pumping coverage, allowing the ion pump to be turned off during periods when the getter pump can maintain adequate vacuum pressure. This periodic operation significantly extends ion pump lifetime by reducing cumulative operational hours and wear.
Solution Approach 2:
The getter pump serves as a self-service backup that maintains vacuum without requiring ion pump operation. This divides the vacuum maintenance function between an active component (ion pump) and a passive component (getter pump), allowing the ion pump to rest and extend its operational life while the getter pump continuously performs pumping function through its material properties.
3Reliability
If supplemental pumps are added to support ion pump restart, then vacuum pressure recovery is improved, but device complexity increases
Solution Approach 1:
Instead of adding supplemental pumps as separate backup systems, the patent merges the getter pump functionality directly into the vacuum system architecture. The getter pump serves as both a primary passive pumping mechanism and an automatic backup that supports ion pump restart without requiring additional supplemental pumping equipment, thereby improving recovery capability while limiting complexity growth.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The use of getter pumps significantly enhances the portability and operational flexibility of ultra-stable laser systems by maintaining low vacuum pressures without continuous power, extending ion pump lifetime, and allowing for remote deployment and use in environments with limited resource access.
Implementation Method 1
Getter pumps establish and maintain vacuum pressure through interactions with gaseous species existing in a vacuum housing, for example, chemical adsorption
Implementation Method 2
Getter pumps establish and maintain vacuum pressure through interactions with gaseous species existing in a vacuum housing, for example, physical adsorption
Data Source
AI summary
Methods and systems for controlling and maintaining the pressure in an ultra-stable optical resonance cavity are disclosed herein. A method for controlling and maintaining the pressure in an ultra-stable optical resonance cavity, for example, comprises providing an ultra-stable optical system housed in a vacuum housing enclosure and a pumping system in communication with the vacuum housing for maintaining a pressure in the vacuum housing less than 1×10−6 Torr. The pumping system may comprise combination pumping achieved with the simultaneous use of a getter pump and an ion pump that provide passive and active pumping, respectively. The pumping system may also comprise passive pumping only with a getter vacuum pump only. The present invention, disclosed herein, achieves passive, power-free pumping in ultra-stable laser systems thereby enhancing the portability of such systems.