Removable Ion Source for Mass Spectrometer Vacuum Maintenance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The conventional process of replacing ion sources in mass spectrometers is time-consuming and requires breaking the vacuum, involving lengthy cooling and venting procedures, which disrupts the operating conditions and increases downtime.
Innovation Solution
A method and system allowing for the removal and replacement of the entire ion source, including ionizing elements, without breaking the vacuum, using a removable ion source that plugs into a docking station, with automated purging, cooling, and heating processes to maintain vacuum integrity and reduce replacement time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the ion source is replaced using conventional methods, then the ionizing elements can be replaced, but the mass spectrometer must be shut down, cooled, and vented, resulting in lengthy downtime of four hours or more
Solution Approach 1:
The ion source is divided into a removable ion volume section containing the ionizing elements and a stationary section remaining in the vacuum chamber. This segmentation allows the ion volume to be extracted and replaced independently without venting the vacuum chamber, reducing replacement time from hours to minutes while maintaining vacuum integrity
Solution Approach 2:
The ionizing elements are extracted from the vacuum chamber through a removable ion volume that can be detached and replaced without breaking the vacuum seal. This extraction method eliminates the need for lengthy cooling and venting procedures required by conventional replacement methods
2Ease of repair
If the mass spectrometer is shut down and vented for ion source replacement, then the ionizing elements can be accessed and replaced, but the operating vacuum is lost and must be re-established
Solution Approach 1:
A removable ion volume acts as an intermediary component that can be extracted from the vacuum chamber without breaking the vacuum seal. This intermediary design allows replacement of ionizing elements while maintaining vacuum integrity in the main chamber, avoiding contamination and lengthy re-vacuumation processes
Solution Approach 2:
The vacuum chamber maintains its inert vacuum environment continuously during ion source replacement. By designing the ion volume to be removable without venting, the system preserves the inert atmosphere, preventing contamination of sensitive internal components and eliminating the need for time-consuming re-establishment of vacuum conditions
3Reliability
If the ion source is designed with robust electrical connections for reliable operation, then the ionizing mechanism functions properly, but the replacement process becomes more complex and time-consuming
Solution Approach 1:
The ion source is segmented into a removable ion volume with integrated electrical connections and a stationary section. This segmentation allows the ionizing elements with their electrical connections to be replaced as a single modular unit, simplifying the replacement process while maintaining reliable electrical connectivity through pre-assembled interfaces
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
Enables quick installation of a clean ion source, reducing analysis downtime to about 30 minutes to an hour, maintaining vacuum conditions and preventing contamination, while simplifying the replacement process and reducing the risk of equipment damage or user harm.
Implementation Method 1
a vacuum chamber that houses the ion source
Implementation Method 2
cooling the ion source to a predetermined temperature by injecting a cooling gas into the interlock chamber
Implementation Method 3
heating and achieving acceptable levels of vacuum and background once the replacement ion source has been installed
Data Source
AI summary
A method of replacing an ion source in a mass spectrometer (MS) system is provided, where the ion source includes an ionization volume, at least one ionizing element and at least one focusing element, and where the mass MS system includes the ion source, a vacuum chamber that houses the ion source, and an interlock chamber. The method includes opening a valve between the interlock chamber and the vacuum chamber, moving the ion source into the interlock chamber through the opened valve and closing the valve, and removing the ion source from the interlock chamber. The ion source may further include means for plugging into a docking station in substantially one action, where the docking station provides sufficient electrical connection, upon plugging with the ion source, for operation of the ion source.