Notes from Notebooks
Notes from Notebooks
A page for wikifying any notes from notebooks, or notes on notes from notebooks.
At this time, please organize by notebook author
EMK
Trolley Parts (20110829)
S-bracket and U-bracket
S-bracket to backplate
Three shortened 7/64s screws and washers
S-bracket to U-bracket
Two 7/64s screws (cut but longer) and nuts (no washers) - save as magnets
Rings (4)
Rings to backplate
Each ring has three 5/64s screws (long)
Pins (12)
Each pin is attached to the ring by a short 5/64s screw
Post (2)
Each post is attached to backplate by a long 7/64s screw and washer (uncut)
Bracket for magnets (3)
Each bracket is attached to the backplate by two shortened 7/64s screws and washers
Magnets (3)
Each magnet is attached to the bracket by two shortened (but long) 7/64s screws and washers
Wheels (6)
Each wheel has a nut and washer
All washers and nuts are the same
Karun
Take each electronics rack and source flange and have students map out what each thing is and what it does
Draw a simple picture of the rack and fill it in, a source/control type table, and the source flange (for each system)
Make important notes, such as Auto vs. Manual, Al interlock, GC pump info
Aqua Regia - HCl:HNO3:H2O (3:1:1 / 900:300:300 mL))
According to Wikipedia, the H2O is non-standard
This is a strong acid whose gold dissolving power fades quickly (3.5 hours?), so mix soon before use and handle very carefully at all times.
Don't use on stainless steel generally, especially on parts with vacuum welds, in vacuum parts, precision parts, or small parts
When scraping a system, be careful of crud getting into sources, bellows, and other spots.
When cleaning vacuum system parts, be careful to not cross-contaminate between in and out of vacuum regions
Possible way to clean stainless - Peroxide:H2O (1:2)
Pickling solution - Formic:Peroxide:H2O (1:1:10)
Don't turn the turbo on near 1 torr
75: As / 91: AsO / 150: As2 [AMU:molecule]
At low temperature, the heater filament will have a low resistance and will source a large current. This could potentially damage the filament, which is why current limiting is used.
Initial start up of Sorensens
Make sure the voltage and current knobs are turned fully CCW and the Eurotherm output power is set to 0%.
Then turn on the power supply.
Slightly increase the current so that the voltage mode LED turns green
Increase the output power until it's current limited. Let the temperature stabilize.
Eventually the filament resistance increases w/ temperature and the current decreases and the voltage increase. Power supply switches back into constant voltage mode. Increase output power until current limit is reached again. Repeat Step until this stops happening.
Increase the current. Increase output power until current limit is reached.
Have new students make a Partial Pressure, Mass, Molecule table during an RGA scan for pPressure above a certain appropriate value like 4e-12
Have new students sketch the chamber from NESW viewing directions and maybe top down