Editing SEM
Jump to navigation
Jump to search
The edit can be undone. Please check the comparison below to verify that this is what you want to do, and then publish the changes below to finish undoing the edit.
Latest revision | Your text | ||
Line 4: | Line 4: | ||
* "TV Mini-SEM (R)" by ISI (International Scientific Instruments) | * "TV Mini-SEM (R)" by ISI (International Scientific Instruments) | ||
* lives in the | * lives in the "science ghetto" on the west end of the south wall at 2169. | ||
* is tended by | * is tended by Mike Kan and the rest of the [https://www.noisebridge.net/mailman/listinfo/sem SEM mailing list] | ||
=== Warnings === | === Warnings === | ||
# If you release the vacuum without venting the pump hose, pump oil will flood the chamber and contaminate the entire mechanism, requiring 10 hours of cleanup. | # If you release the vacuum without venting the pump hose, pump oil will flood the chamber and contaminate the entire mechanism, requiring 10 hours of cleanup. | ||
# If you vent air into the column without powering down the filament, you'll probably destroy the filament ($100) | # If you vent air into the column without powering down the filament, you'll probably destroy the filament ($100). | ||
=== Startup procedures === | === Startup procedures === | ||
# | # Get the power cord from Mike. | ||
# See PDFs on vacuum start up and operators manual linked below. | # See PDFs on vacuum start up and operators manual linked below. | ||
=== Todo list === | === Todo list === | ||
Short Term: | Short Term: | ||
# Isolate vibration from external sources; buses, people, etc. | # Isolate vibration from external sources; buses, people, etc. See Repair and Enhancement notes below. (2010-12-12) | ||
# Create/obtain specimen stage clamp or spring to prevent specimen vibration. (2010-12-12) | # Create/obtain specimen stage clamp or spring to prevent specimen vibration. (2010-12-12) | ||
# Obtain some sputter coated specimens. (2010-12-12) | # Obtain some sputter coated specimens. (2010-12-12) | ||
Long Term: | Long Term: | ||
# Column liner needs to be replaced. Larry may be able to provide a clean liner. (2010-06-15) (update: Larry has taken column liner to his lab for cleaning)( | # Column liner needs to be replaced. Larry may be able to provide a clean liner. (2010-06-15) (update: Larry has taken column liner to his lab for cleaning) | ||
# | # Build digital capture stage to replace CRT mechanism (2010-06-15) | ||
# Replace 8.4" slow scan CRT with slow scan XGA LCD? (see above) | |||
# Build sputter coater for specimen preparation (2010-06-15) | |||
# Test repair of X Stigmator circuit. Replaced 741 op amp. (completed, work began 2010-11-20, tested 2010-12-10) | # Test repair of X Stigmator circuit. Replaced 741 op amp. (completed, work began 2010-11-20, tested 2010-12-10) | ||
# Adjust vertical overscan of CRT (completed 2010-12-12, including hack sawing access port to overscan potentiometers in the CRT module) | # Adjust vertical overscan of CRT (completed 2010-12-12, including hack sawing access port to overscan potentiometers in the CRT module) | ||
# Fix 2x magnification toggle switch (2010-12-12) | # Fix 2x magnification toggle switch (2010-12-12) | ||
# Diagnose and repair barrel distortion and occlusion at low magnification (2010-12-12) | # Diagnose and repair barrel distortion and occlusion at low magnification (2010-12-12) | ||
# Sew dust cover (2010-12-12 | # Sew dust cover (2010-12-12) | ||
# Rubber grommet around edge of CRT potentiometer port needed | # Rubber grommet around edge of CRT potentiometer port needed | ||
=== Repair and Enhancement Notes=== | === Repair and Enhancement Notes=== | ||
Line 91: | Line 81: | ||
=== Specimen Images === | === Specimen Images === | ||
[[Image:IMG_0004.jpg|thumb|left|Image of mechanical pencil graphite smudge on an aluminum slug at approximately 20x magnification. The specimen is about 1 mm across. This is prior to repairing the X Stigmator. Magnification was limited. Imaged by Chris Murphy and Mike Kan. | |||
]] | |||
[[Image:IMG_0652.jpg|thumb|left|Mechanical pencil graphite smudge on aluminum slug. 1000x magnification. This is post repair of X Stigmator. Imaged by the Noisebridge SEM. Mike Kan, Chris Murphy.]] | |||
Image: | |||
Image: | [[Image:IMG_0655.jpg|thumb|left| Tip of mechanical pencil graphite on aluminum slug. 500x magnification. This is post repair of X Stigmator. Imaged by the Noisebridge SEM. Mike Kan, Chris Murphy.]] | ||
Image: | [[Image:IMG_0654.jpg|thumb|left| Tip of mechanical pencil graphite on aluminum slug. 1000x magnification. This is post repair of X Stigmator. Imaged by the Noisebridge SEM. Mike Kan, Chris Murphy.]] | ||
Image: | [[Image:IMG_0656.jpg|thumb|left| Tip of mechanical pencil graphite on aluminum slug. 5000x magnification. This is post repair of X Stigmator. Imaged by the Noisebridge SEM. Mike Kan, Chris Murphy.]] | ||
Image: | [[Image:IMG_0657.jpg|thumb|left| Tip of mechanical pencil graphite on aluminum slug. 10,000x magnification. This is post repair of X Stigmator. Specimen was moving on the slug due to mechanical vibration. Imaged by the Noisebridge SEM. Mike Kan, Chris Murphy.]] | ||
Image: | [[Image:IMG_0624.jpg|thumb|left|Semiconductor ball grid array at 20x magnification prior to repairing the X Stigmator. Mike Kan, Chris Murphy]] | ||
Image: | [[Image:IMG_0649.jpg|thumb|left|Snapped metal region of a box cutter razor blade. Imaged on the Noisebridge SEM. About 5000x magnification. This is post repair of X Stigmator. Mike Kan, Chris Murphy]] | ||
Image: | [[Image:IMG_0007.jpg|thumb|left|Head of a small 2mm allen type machine screw. Less than 1000x magnification. This is post repair of X Stigmator. Mike Kan, Chris Murphy]] | ||
[[Image:Allen_close_up.jpg|thumb|left|Head of a small 2mm allen type machine screw. About 1000x magnification. This is post repair of X Stigmator. Mike Kan, Chris Murphy]] | |||
[[ | [[Image:IMG_0026.jpg|thumb|left|Diatom imaged in fast scan mode (lower resolution than slow scan mode). Magnification unrecorded. Mike Kan, Chris Murphy. 12/12/10]] |