Cryogenic systems and methods
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Solution Overview
Problem
Cryogenic systems face challenges in isolating samples from vibrations caused by cooling systems while maintaining a steady sample temperature, as existing solutions fail to provide a reliable vibration-free environment.
Innovation Solution
The implementation of a cryogenic sample analysis system with a resonance frequency insulating assembly, comprising a suspended mass and thermal standoff, which isolates the sample platform from both external temperatures and resonance frequencies, using a combination of flexible and rigid components to minimize vibrations and temperature fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a cryogenic cooling system is used to cool the sample, then the sample temperature is reduced to cryogenic levels, but the cooling system generates vibrations that affect the sample
Solution Approach 1:
The system divides the sample support structure into separate components: a vibration-isolated sample platform and a cooling system, connected through vibration isolation elements. This segmentation allows the cooling function to be maintained while isolating the sample from vibrations generated by the cooling system.
Solution Approach 2:
Vibration isolation elements are introduced as intermediary components between the cooling system and the sample platform. These intermediaries absorb and dampen vibrations from the cooling system before they can reach the sample, allowing cryogenic cooling to proceed without transmitting harmful vibrations to the sample.
2Productivity
If the sample platform is thermally coupled to the coldhead for efficient cooling, then cool-down rates are improved, but the platform becomes susceptible to external temperature variations and resonance frequencies
Solution Approach 1:
The thermal connection between the coldhead and sample platform is segmented into two distinct pathways: a rigid thermal connection for efficient heat transfer during cool-down, and a vibration isolation connection that blocks transmission of external temperature variations and resonance frequencies. This segmentation enables simultaneous achievement of fast cool-down and thermal stability.
Solution Approach 2:
Different portions of the sample platform have different thermal and mechanical properties: the region connected to the coldhead has high thermal conductivity for efficient cooling, while the regions isolated from external sources have low thermal conductivity and high vibration isolation to block temperature fluctuations and resonance frequencies.
3Stability of the object's composition
If vibration isolation elements are added to reduce sample vibrations, then sample stability is improved, but the system complexity increases
Solution Approach 1:
The vibration isolation elements are merged with the thermal management components of the system. The same structural elements that provide thermal coupling between the coldhead and sample platform also serve as vibration isolation elements, eliminating the need for separate vibration isolation components and reducing overall system complexity.
Solution Approach 2:
The sample platform and its supporting structures are designed to perform multiple functions simultaneously: providing thermal coupling for efficient cooling, mechanical support for the sample, and vibration isolation from external sources. This multi-functionality reduces the number of separate components needed and simplifies the overall system design.
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
This configuration effectively reduces sample vibrations and maintains a stable temperature, allowing for improved cryogenic sample analysis by isolating the sample from environmental resonance frequencies and temperature variations, enhancing cool-down rates and thermal agility.
Implementation Method 1
an insulating assembly operatively engaged between resonance frequencies generated by the environment and/or the coldhead, the insulating assembly comprising a suspended mass
Implementation Method 2
resonance frequency insulating assembly operatively engaged between the sample platform and the housing
Implementation Method 3
insulating both the sample platform and the sample from both external temperatures and resonance frequencies
Data Source
AI summary
Cryogenic sample analysis systems are provided that can include: a system housing in direct physical contact with an environment about the system; a sample platform within the system housing; and a resonance frequency insulating assembly operatively engaged between the sample platform and the housing. Cryogenic sample analysis systems are also provided that can include: a system housing in direct physical contact with an environment supporting and surrounding the system; a sample platform within the system and operationally coupled to a coldhead of the system; and an insulating assembly operatively engaged between resonance frequencies generated by the environment and/or the coldhead, the insulating assembly comprising a suspended mass.