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* "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). | ||
# | # If you | ||
=== 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 === | ||
# 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) | |||
# | # (long term) build digital capture stage to replace CRT mechanism (2010-06-15) | ||
# | # 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) | ||
# adjust vertical overscan of CRT | |||
# | # fix 2x magnification toggle switch | ||
# diagnose and repair barrel distortion and occlusion at low magnification | |||
# replace 8.5" slow scan CRT? | |||
=== Repair and Enhancement === | |||
=== Repair and Enhancement | |||
* schematics framed behind SEM are to a similar, potentially slightly more modern model | * schematics framed behind SEM are to a similar, potentially slightly more modern model | ||
* poorly designed wire harness may cause linear op amp and transistor on the J1 board of the | * poorly designed wire harness may cause linear op amp and transistor on the J1 board of the CRT module to fail | ||
* camera mounting stage and bellows hood for slow-scan exposure. Proposed (2010-06-15), Completed by Mike, Miloh, and Chris (2010-11-06) | * camera mounting stage and bellows hood for slow-scan exposure. Proposed (2010-06-15), Completed by Mike, Miloh, and Chris (2010-11-06) | ||
=== Specifications === | === Specifications === | ||
* Delivered in September, 1975 | * Delivered in September, 1975 | ||
* magnifies up to 20,000x | * magnifies up to 20,000x | ||
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=== 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. Maybe 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. Maybe 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. Maybe 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:IMG_0624.jpg|thumb|left|Semiconductor ball grid array at 20x magnification prior to repairing the X Stigmator. Mike Kan, Chris Murphy]] | |||
[[ | [[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]] |