Home    Phone sign  Mail icon Seminars Sitemap Contact Impressum
MPI Halbleiterlabor trade name
 
press button
 
Projects
Detector for Scanning Transmission X-Ray Microscopy

 

 

     
  Detector for Scanning Transmission X-Ray Microscopy  
         
  X-ray microscopy has evolved when synchrotrons became bright sources of monochromatic and coherent X-ray photons, and with the improvement of X-ray nanofocusing optics. A typical scanning X-ray microscope or microprobe uses a Fresnel zone plate to focus a primary beam of X-rays to a spot with a diameter between 30 nm (in the soft X-ray range) and 150 nm (in the hard X-ray range).   Schematic of the scanning transmission X-ray microscope at the National Synchrotron Light Source.(Brookhaven National Laboratory).(Courtesy of B. Hornberger, Stony Brook University)
 
       
  An image is obtained by scanning the specimen through the focus and measuring the transmitted intensity for each scan pixel.  
     
  Such a setup is shown in the figure on the right and the Figure to the left. Among the advantages of X-ray microscopy in comparison to classical microscopy with visible light, there is greater sample penetration as well as less radiation damages as compared to electron microscopes. Specimens can be studied under atmospheric pressure and no preparation like conductive coating is necessary so that biological samples can be imaged in their natural state.
[more...PDF document PDF 340 kB]
 
     
To internal topic back to Collaborations, Experiments & Projects – Overview  
     
To the top
Top © 2007-14, Max Planck Society, Munich - Internal linkDisclaimer English language flag /Impressum German flag
Logo Max-Planck-Gesellschaft
 Schematic of the detector princinple: In a scanning X-ray microscope, a zone plate lens is used to produce an X-ray focus, through which the specimen is raster-scanned(Courtesy of B. Hornberger, Stony Brook University)