SEM

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Contents

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

Warnings

  1. 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.
  2. If you vent air into the column without powering down the filament, you'll probably destroy the filament ($100).
  3. If you

Startup procedures

  1. get the power cord from Mike.
  2. (to be continued)

Todo list

  1. column liner needs to be replaced. Larry may be able to provide a clean liner. (2010-06-15)
  2. (long term) build digital capture stage to replace CRT mechanism (2010-06-15)
  3. build sputter coater for specimen preparation (2010-06-15)
  4. 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)


Documentation

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

Schematics

Media: Polaron_Pirani_Gauge_Head_for_Sputter_Coater.pdf

Media: Schematic_of_Photomultiplier.pdf‎

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