Vacuum hub (2005-2006):

Assembled vacuum hub.

• NW-40 adaptor on bottom was subsequently replaced with thin wall bellows to attach to core
• Electrical feed through on top was subsequently replaced with a blank off.
• Blank off on right was subsequently replaced with a 2.75" CF to male 1/4" VCR adaptor to connect to convectron and gas handling system

Bellows (01/20/2008)

Thin wall bellows will connect core to vacuum hub. Bellows will seal to conflat flanges with viton o-rings.

Bellows clamp flange (01/20/2008)

Clamp flange on bellows and spare pair showing mounting groove.

Bellows o-ring (01/20/2008)

O-ring seals bellows to core and insulates vacuum hub from core allowing current monitoring and biasing on each hemisphere.

Bellows clamp (01/20/2008)

Groove in clamp compresses the bellows' lip against the o-ring.

Bellows clamp (01/20/2008)

Both clamps tighten down clamping bellows to core conflat. The o-ring on the vacuum hub is compressed by the springiness of the bellows until it is under vacuum, where the atmospheric pressure creates a hard seal.

Bellows spacer (2/06/2008)

Spacers are inserted between the flanges to prevent the bellows from collapsing under vacuum.

O-ring retaining ring (2/19/2008)

Retaining ring is inserted into top o-ring to prevent it from slipping while under vacuum.

Retaining ring GCODE

O-ring retaining ring (2/19/2008)

Retaining ring is inserted into top o-ring to prevent it from slipping while under vacuum.