Bake Viewport on BOS

Handling and baking a viewport is similar to a blank, with a big difference: there is glass in the middle of the component!
Be extra careful, handling, bolting, tightening, and baking the viewport!
Install viewport on BOS
- Be careful when inserting bolts and tighten them down with fingers and with wrench
Attach thermocouple to a flange near viewport glass (not necessarily near the viewport glass) with kapton tape
Cover with inner double-layer of foil
- Avoid a build up or bunching up of foil over the glass, flattened foil is better
- Don't press down over glass to flatten foil, do it before overlaying
- Use the bolts to apply pressure to foil near glass
- Don't apply pressure directly over glass when wrapping with foil or taping heater tape or thermocouple
Put on heater tape, not much is needed for viewports
- Kapton tape as needed but sparingly
- Avoid any heater tape over the glass
- Avoid any heater tape over the thermocouple wire, the wire insulation will melt at ~130 C
Put on outer double-layer of foil
- Use the bolts again to apply pressure to foil near glass
Bake the viewport
Take HVP off BOS and put on transit case
- Always check transit case viton seal
- If transit case isn't available, carefully use a blank

Replace Viewport

Like removing a blank, but we need to be extra careful about the glass
Remove the old viewport
- If it is good for re-use after etching, wrap it in kimwipes, then clean foil
- If it is leaking or not reusable, foil and trash it

Like installing a blank, but we need to be extra careful about the glass
Be careful when inserting bolts and tighten them down with fingers and with wrench
Pump down the chamber.
Leak check the HVP assembly, shutters, and things we were working near (e.g. cell power and thermocouple feedthroughs, N2 cell feedthroughs)