MATTER Undergraduate web site

 
  MATTERTEM | Site Map | Help | Contact us | Glossary | About  
 
     

Previous ] Continue ]

TEM Basics

 
Condenser alignment
    J
 

An important microscope alignment involves the centering of the condenser aperture about the optical axis. If the aperture is off-centre the beam is displaced away from the axis as the condenser lens is focused.

Try aligning the beam in the simulation opposite.

You will know that you have the correct setting of the x and y shifts when, as you change the C2 control, the beam opens concentrically about the cross at the centre of the screen.

 
Previous ] Continue ]
  Electron-atom interactions | Electron gun | Lenses
 

2000 MATTER, The University of Liverpool. All rights reserved.
    contact us   Last updated: July 25, 2000 commercial information