installation of the first barrel signal feedthroughs by the BNL team
October 2001

Pictures kindly provided by Tom Muller of Brookhaven National Lab. All pictures were taken during the first two weeks of October 2001 at CERN.


First barrel feedthrough crates in CERN.

View of two barrel signal feedthroughs in their crate, with their traveller sheet.

Electrical tests.

Leak tests.

Removing signal feedthrough from its crate.

Funnel cutting with orbital cutter. Roy is having a close look, as the same operation will have to be performed on the endcap signal feedthroughs.

Supporting feedthrough for super-insulation installation.

Installation of super-insulation.

Super-insulation installed.

Installing feedthrough on cryostat insertion jig.

Cryostat insertion jig attached to hoist.

Preparing cryostat for feedthrough insertion.

Cryostat funnel cut.

Feedthrough being moved to the top of the barrel cryostat.

Feedthrough being brought into position on the cryostat. Notice the already installed feedthrough on the left.

Feedthrough being brought into position on the cryostat. Notice the already installed feedthrough on the left.

Feedthrough being brought into position on the cryostat. Notice the already installed feedthrough on the left.

Inserting pigtail protector before welding the feetdhrough to the cryostat.

Pigtail protector stopper.

View of pigtails. Notice the protected pigtails for 2 other installed feedthroughs on the left.

Tack welding the feedthrough to the cryostat. The feedthrough is held snuggly in place by an overpressure in the bellows.

The feedthrough is tack welded to the cryostat.

Orbital welding of the feedthrough to the cryostat.

Pierre Pailler (behind feedthrough pigtails, Cryostat and Cryogenics Project Leader) with the BNL feedthrough team and a feedthrough unit just before being installed on the barrel cryostat.

Tom Muller (right) and Michel next to the barrel cryostat in building 180 at CERN.

Members of the UVic endcap signal feedthrough team posing as tourists on the barrel cryostat.

Pierre Pailler (right, Cryostat and Cryogenics Project Leader) with the BNL feedthrough team in front of the barrel cryostat.