Movable EBSD Detector Positioning for Vacuum-Safe TKD Switching
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Solution Overview
Problem
Conventional electron microscopes require multiple detectors or manual adjustment of a single EBSD detector for EBSD and TKD measurements, necessitating frequent venting of the vacuum chamber, which is time-consuming and can compromise chamber cleanliness.
Innovation Solution
An electron microscope equipped with an electromechanical unit that allows a single detector to move between positions for EBSD and TKD measurements, enabling these methods to be performed without venting the vacuum chamber by actuating the detector from outside.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple detectors are used for EBSD and TKD measurements, then measurement capability is improved, but device complexity increases
Solution Approach 1:
The EBSD detector is designed to perform multiple functions by switching between EBSD and TKD measurement modes. The detector can detect backscattered electrons for EBSD measurements and transmitted electrons for TKD measurements, eliminating the need for separate detectors for each measurement type.
Solution Approach 2:
The detector position is made dynamically adjustable through an electromechanical unit that can tilt and position the detector at different angles and locations. This allows the same detector to be optimally positioned for either EBSD or TKD measurements as needed.
2Adaptability or versatility
If manual adjustment of detector is performed for method switching, then adaptability is improved, but loss of time increases
Solution Approach 1:
The manual mechanical adjustment system is replaced with an electromechanical unit that can automatically position and tilt the detector. This electronic control system eliminates the need for manual intervention, significantly reducing the time required to switch between measurement methods.
Solution Approach 2:
The electromechanical unit pre-positions the detector in optimal locations for different measurement modes. When switching between EBSD and TKD, the system has already prepared the detector positions, enabling rapid transitions without manual reconfiguration.
3Ease of operation
If vacuum chamber is vented for detector adjustment, then ease of operation is improved, but reliability of vacuum integrity deteriorates
Solution Approach 1:
The electromechanical unit enables the detector to be repositioned and adjusted while the vacuum chamber remains sealed and under vacuum. The system serves itself by providing remote adjustability, eliminating the need to break vacuum for maintenance or configuration changes.
4Device complexity
If detector is fixed in position, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The detector position is made dynamically adjustable through an electromechanical unit that can tilt and position the detector at different angles and locations. This allows the same detector to be optimally positioned for either EBSD or TKD measurements as needed.
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 solution enables efficient switching between EBSD and TKD measurements using a single detector, maintaining vacuum integrity and reducing measurement time, while also improving data acquisition speed and quality.
Implementation Method 1
a beam generator (102) adapted to generate a beam of charged particles within the vacuum chamber
Implementation Method 2
electron backscatter diffraction (EBSD)... diffracted backscattered electrons, generated by the interaction between the beam of electrons and the probe, are detected by an EBSD detector
Implementation Method 3
transmission Kikuchi diffraction (TKD)... transmitted scattered electrons are detected by the EBSD detector
Implementation Method 4
When the backscattered electrons strike a phosphorus screen of the EBSD detector, a light is produced
Data Source
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AI summary
The present invention refers to an apparatus (100) and a method for detecting characteristics of a probe. In an embodiment, the apparatus (100) comprises a vacuum chamber (104) and a beam generator (102) adapted to generate a beam of charged particles within the vacuum chamber (104). When the beam of charged particles falls onto the probe, interaction particles and/or interaction radiation are generated. The apparatus (100) further comprises an electromechanical unit (114) within the vacuum chamber (104) and a detector (110) comprising a plurality of detection units and being arranged on the electromechanical unit (114) allowing for the detector (110) to move from a first position with respect to the beam generator (102) to a second position with respect to the beam generator (102) and vice versa, upon a corresponding actuation of the electromechanical unit (114) performable from outside of the vacuum chamber (104).