![]() ![]() The optimal arrangement results when the camera is as close to the sample as possible while avoiding the possibility of collision between the sample surface and the delicate phosphor screen. It is inserted to within several mm of the surface of the inclined sample. The camera resides on a horizontally mounted motorized carriage. The detector is actually a camera equipped with a phosphor screen integrated with a digital frame grabber. ![]() Journal of Applied Crystallography, 42, 726-729.The polished sample is placed in the SEM and inclined approximately 70 o relative to normal incidence of the electron beam. ![]() Crystallography Open Database – an open-access collection of crystal structures. CSpot runs under Windows family operating system (XP or higher). However, it can be also used as teaching aid. CSpot is mainly dedicated to be a laboratory tool, helping in the analysis and interpretation of data. The software has built-in crystallographic calculators. The software supports all space group symmetries and can work with Crystallography Open Database. CSpot operates on the information regarding microscope operating conditions (e.g., accelerating voltage, camera length, detector pixel size) and crystallographic structures. When working with ring diffraction patterns, the user can present them in integral form, being analogues of X-Ray diffraction patterns and analyzed in a similar manner. The main feature of the program is the ability to perform automatic indexing and crystal orientation determination using spot and Kikuchi diffraction patterns. CSpot allows for manipulation of simulated diffraction patterns in a real-time and interactive manner by changing and visualizing crystal orientation (e.g., pole figures) or adjusting simulation parameters. The ability of the software to work with different types of diffraction patterns gives a user the possibility to cover a wide range of analyses and extract various information. CSpot deals with three types of TEM diffraction patterns: spot, Kikuchi and ring (polycrystalline) diffraction patterns. In order to meet this challenge, a computer program called CSpot (Fig. In order to extract relevant crystallographic information, obtained diffraction patterns may require a significant amount of post-acquisition analysis. Electron diffraction in the transmission electron microscopy (TEM) is a well-established and widely used technique in laboratories all over the world. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
January 2023
Categories |