Editing SEM
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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 room that used to house the laser cutter | * lives in the room that used to house the laser cutter | ||
* is tended by Alan Rockefeller | * is tended by Jeff Miller, Alan Rockefeller, Chris and Jim 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). The filament has a design lifetime of about 25 hours, depending on the current put through it. Adjust the specimen stage and other controls at low current, reserve higher currents for final photos. | # If you vent air into the column without powering down the filament, you'll probably destroy the filament ($100). The filament has a design lifetime of about 25 hours, depending on the current put through it. Adjust the specimen stage and other controls at low current, reserve higher currents for final photos. | ||
# Mike | # Mike Khan has warned that if anyone asks him anything about the SEM, he's going to move it to another hackerspace. | ||
=== Startup procedures === | === Startup procedures === | ||
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=== Todo list === | === Todo list === | ||
Short Term: | Short Term: | ||
# Determine if their is sufficient interest in the SEM to rationalize going forward. (2013-6-20) | |||
# Isolate vibration from external sources; buses, people, etc. Mostly finished. (2013-6-20) | # Isolate vibration from external sources; buses, people, etc. Mostly finished. (2013-6-20) | ||
# Figure out what to do about the person(s) now " | # Figure out what to do about the person(s) now sleeping in the "clean room" which houses the SEM. (2013-6-20) | ||
# Design/build/find a sputter coater | # Design/build/find a sputter coater: quite feasible <$100 for "don't touch" design, another $50-$100 for safety features. (2013-6-20) | ||
# 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) | ||
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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)(udate: column liner is now clean) (2013-6-20) | ||
# Integrate the digital capture and control unit Jeff built for his own Mini-SEM into the unit. (2013-6-20) | # Integrate the digital capture and control unit Jeff built for his own Mini-SEM into the unit. (2013-6-20) | ||
# 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) | ||
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# Replace forepump with a (hopefully larger) pump that has a ballast port. | # Replace forepump with a (hopefully larger) pump that has a ballast port. | ||
# Buy/find some real vacuum valves, turn simple spool pieces to serve as adapters, and electro-pneumatically interlock the valves so that valve sequencing is fool-proof. | # Buy/find some real vacuum valves, turn simple spool pieces to serve as adapters, and electro-pneumatically interlock the valves so that valve sequencing is fool-proof. | ||
=== Repair and Enhancement Notes=== | === Repair and Enhancement Notes=== |