Cryostat Side-Loading Transfer Port to Reduce Vertical Clearance
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Solution Overview
Problem
Cryostats employing top-loading or bottom-loading sample exchange mechanisms face limitations in scalability due to increased vertical clearance requirements and inability to concurrently exchange multiple samples, leading to inefficiencies in time and energy usage.
Innovation Solution
The implementation of a side-loading sample exchange mechanism within a cryostat, which reduces vertical clearance needs and allows for the concurrent exchange of multiple samples by using a sidewall with feedthrough ports that maintain vacuum conditions and thermal integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If top-loading or bottom-loading sample exchange mechanisms are employed, then sample exchange capability is improved, but vertical clearance requirements increase significantly
Solution Approach 1:
The patent transitions from vertical sample exchange (top-loading/bottom-loading) to horizontal sample exchange through the sidewall. The feedthrough port is positioned in the sidewall of the outer vacuum chamber, allowing samples to be exchanged horizontally rather than vertically, thereby eliminating the need for additional vertical clearance while maintaining sample exchange capability.
2Ease of operation
If top-loading or bottom-loading sample exchange mechanisms are employed, then sample exchange is enabled, but the ability to concurrently exchange multiple samples is lost
Solution Approach 1:
The patent divides the sample exchange function into multiple independent feedthrough ports positioned at different locations on the sidewall. Each feedthrough port can independently exchange samples, allowing multiple samples to be exchanged concurrently. This segmentation of the exchange mechanism into separate access points enables parallel operations without interfering with each other.
3Ease of operation
If conventional sample exchange mechanisms are used, then sample exchange is achieved, but thermal losses increase and cryogenic temperatures are compromised
Solution Approach 1:
The feedthrough port maintains vacuum conditions between the ambient environment and the inner chamber housing the sample mounting surface. By preserving the vacuum barrier and avoiding the need to warm the inner chamber to room temperature, the system minimizes thermal losses and maintains cryogenic temperatures during sample exchange operations.
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 approach reduces vertical clearance requirements, minimizes thermal losses, and enables the simultaneous exchange of multiple samples, thereby enhancing the efficiency and scalability of cryostat operations.
Implementation Method 1
a vacuum valve coupled to the feedthrough port that maintains a pressure differential between an ambient environment and an interior of the outer vacuum chamber
Implementation Method 2
cryogenic temperatures can be maintained within an inner chamber housing the sample mounting surface
Data Source
AI summary
Techniques facilitating transfer port systems for cryogenic environments are provided. In one example, an outer vacuum chamber of a cryostat can comprise a sidewall encompassing an inner chamber comprising a sample mounting surface. The sidewall can comprise a feedthrough port providing access to the sample mounting surface from a region external to the outer vacuum chamber.