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). | ||
# | # If you | ||
=== Startup procedures === | === Startup procedures === | ||
# | # get the power cord from Mike. | ||
# | # (to be continued) | ||
=== Todo list === | === Todo list === | ||
# column liner needs to be replaced. Larry may be able to provide a clean liner. (2010-06-15) | |||
# | # (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. (ongoing, work began 2010-11-20) | ||
# | |||
=== 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 (reliably up to 700x in its present condition) | ||
* outputs to a CRT | * outputs to a CRT | ||
* non-digital, non-NTSC, non-PAL, analog output signal | * non-digital, non-NTSC, non-PAL, analog output signal | ||
Line 91: | Line 59: | ||
=== 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: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]] |