PPT Slide
- Neutral pressure should be < 10-10 Torr
- Low surface area aluminum vacuum vessel
- All in-vacuum components baked to 150 oC
- Coils are separate from vacuum vessel
- High temp. bake eliminates water etc. Hydrogen remains.
- Hydrogen outgassing from baked aluminum is low - special surface treatments may be used to lower it further
- Hard copper gasket seals - no o-rings.
- Oil free multiple stage pump system
- Ion pump with base pressure < 10-11 Torr
- The design incorporates large pump ports with excellent conductance - the ultimate pressure depends on pumping speed. Should be < 10-10 Torr at a modest pumping speed of 200 liters/second