Augustana Scanning Electron Microscope

A.  Startup Checklist

1.   Is the green Ready light on?
2.   Turn on the nitrogen gas, large valve first.
3.   Press the yellow Console button.
4.   Press the orange Image button.
5.   Has an image appeared on the screen?
      Adjust the Brightness, if necessary.
6.   Check the filament alignment.
7.   Check the alignment of the final aperture.
8.   Turn on the computer and the Avalon.
           Logon:  username:  phlab
                        password:  electron

 

C. Shutdown Checklist

1.  Return to the TV image.
2.
  Turn the magnification knob to Low.
3.
  Move the Zoom lever all the way down.
4.
  Move the specimen holder back to the center so
     you are looking at the head of the screw.
5.
  Press the green Ready button.
6.
  Press the yellow Console button.
7.  Turn off the nitrogen gas, small valve first.
8.  Turn off the computer and Avalon.
9.  Turn off the lamp(s) and room lights.

 

If you have questions call:

   Nathan Frank (309-794-3402)
  
Bob Frank (309-786-3209)
   or Dave Renneke (309-786-5247)

Last update:  September 28, 2009

 

B.  Changing Specimens

1.  Press the green Ready button to shut off the
     beam.
2.
  Check to be sure the nitrogen gas is turned on.
3.
  Press the brown Air button and unlatch the
     chamber door.
4.
  When the door opens (after about a minute),
     temporarily shut off the flow of nitrogen with the
     small valve.
5.
  Change specimens.
6.
  Close the chamber door and hold it shut without
     latching it.
7.
  Press the green Pumping button.  After you hear
     the pumping value click open, latch the chamber
     door.
8.
  Open the small nitrogen valve.
9.  Wait for the green Ready light to come on before
     pressing the Image button.   This will take
     several minutes.  Watch the Pirani and high
     vacuum gauges to monitor the progress.

 

Filament Operating Conditions

LaB6
           Filament Current        1.92 A
     
     Beam Current             20 mA

Tungsten
          Filament Current         2.8 - 3.1 A
         
Beam Current             150 mA

A new LaB6 filament was installed in April, 2008.