updated April 10, 2008

Iridium Ultra - X-Ray Mapping

X-ray maps are excellent tools for determining the location of phases, particles, and other features on a sample that can be discriminated by variations in elemental composition. An x-ray map is performed by rastering the microscope's beam over the sample. The scan area of the beam is divided into a rectangular grid of pixels. The beam is then sequentially positioned on each of these pixels and x-rays are acquired. The x-rays are displayed on the screen as rectangular images (maps), one for each element in the element list for the map. The map for an element visually depicts the number of x-rays for the element at each pixel.

X-Ray Map

As an example, this x-ray map displays the distribution of Fe, Cu, and Au.

Iridium Ultra provides an advanced kind of X-ray map which is called FastMap. FastMaps acquire and display the x-ray maps for the elements in the element list, and also store information that allow for viewing the full spectrum from each pixel.

Below are the advanced features of the FastMap: