The Scanning Electron Microscope at Noisebridge.
- "TV Mini-SEM (R)" by ISI (International Scientific Instruments)
- lives in the "science ghetto" on the west end of the south wall at 2169.
- is tended by Mike Kan and the rest of the SEM mailing list
- 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
- get the power cord from Mike.
- (to be continued)
- 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
- 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 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)
Media: Vacuum_System_Operating_Instructions.pdf - How to start the pump
Media: ISI_Mini-TV_SEM_Manual-Troubleshooting-Reference_Guide.pdf - How to use and fix the SEM
Media: Specimen_Stage_Service_Request.pdf - Why the rotating stage is broken
Media: Cards.pdf - Historic docs
Media: Other_Docs.pdf - Repair notes
Image of mechanical pencil graphite on an aluminum slug at approximately 20x magnification. The specimen is about 1 mm across. Higher magnification images of this specimen are not available. Imaged by Chris Murphy and Mike Kan.