Plasma Cleaning Ultra-High Vacuum Components
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for cleaning ultra-high vacuum components are inadequate in completely eliminating hydrocarbon contamination, leading to prolonged vacuum pump operation times and potential equipment damage or false results in applications like mass spectrometry.
Innovation Solution
A method involving plasma cleaning of components at temperatures above 80°C within a vacuum furnace, followed by evacuation to pressures below 10E-5 mbar, with multiple cycles to achieve significant hydrocarbon contamination reduction and accelerated outgassing, utilizing a vacuum furnace equipped with a plasma generator and turbomolecular pump.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cleaning methods are used, then components can be prepared for vacuum use, but hydrocarbon contamination cannot be completely eliminated, leading to prolonged pump operation times
Solution Approach 1:
The invention changes the cleaning parameters by using plasma cleaning at elevated temperatures (80-125°C) instead of conventional room temperature cleaning methods. This temperature parameter change enables more effective removal of hydrocarbon contamination while the plasma provides the chemical mechanism to break down contaminants that conventional methods cannot eliminate
Solution Approach 2:
The invention replaces mechanical cleaning methods with plasma cleaning. The plasma, generated by applying radio frequency power to a gas in the vacuum chamber, provides a non-mechanical cleaning mechanism that chemically breaks down and removes hydrocarbon contamination more effectively than mechanical or solvent-based methods
2Reliability
If vacuum pumps are run for extended periods to eliminate hydrocarbon contamination, then ultimate pressure can be reached, but equipment operates inefficiently and costly delays occur
Solution Approach 1:
The invention performs preliminary plasma cleaning of components before they are installed in the vacuum system. This preliminary action removes hydrocarbon contamination in advance, so that when the system is evacuated, the pumps do not need to run for extended periods to remove contaminants, thereby improving system efficiency and productivity
3Ease of operation
If residual hydrocarbon contamination is present, then vacuum systems can still operate, but mass spectrometry equipment may be ruined or provide false results
Solution Approach 1:
The invention applies local quality by focusing the plasma cleaning on surfaces that will be exposed to ultra-high vacuum and potentially to mass spectrometry equipment. The plasma cleaning process treats specific surfaces with elevated temperature and reactive species to ensure they are free from hydrocarbon contamination that could interfere with sensitive measurements
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 significantly reduces hydrocarbon contamination, allowing ultra-high vacuum systems to reach ultimate pressure much quicker, ensuring the cleanliness and reliability of components for sensitive applications.
Implementation Method 1
plasma cleaning the component at a temperature of greater than about 80° C.
Implementation Method 2
evacuating the chamber to a pressure of less than about 10E-5 mbar
Implementation Method 3
the elevated temperature of the component (e.g. at least 80° C.) results in accelerated outgassing therefrom
Data Source
AI summary
The present invention provides a method for cleaning a component for use in an ultra-high vacuum. The method may comprise the steps of placing the component to be cleaned in a vacuum furnace chamber; plasma cleaning the component at a temperature of greater than about 80° C.; and evacuating the chamber to a pressure of less than about 10E-5 mbar. Apparatus for performing such methods and kits comprising said components are also provided.