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Kirk McDonald's photo safari of his stay at CERN during the Hg loop unpacking and verification of status of the mercury loop:

2nd-5th April 07

See the last photo for a possible issue....

http://www.hep.princeton.edu/~mcdonald/mumu/target/apr0507/Picture046.jpg

shows the bent eyebolt that was attached to one of the snout support cables.

http://www.hep.princeton.edu/~mcdonald/mumu/target/apr0507/Picture047.jpg

shows how the rubber collar now overhangs the taper of the snout by quite a

lot. This led to speculation that the snout had been moved towards the

secondary box, possibly damaging the primary vessel.

http://www.hep.princeton.edu/~mcdonald/mumu/target/apr0507/Picture051.jpg

shows how the snout was about 4" above the box below when in nominal position. The snout fell down this 4" during transports => about a 4 deg bend to the flex joints of the snout.

http://www.hep.princeton.edu/~mcdonald/mumu/target/apr0507/Picture060.jpg

after removing the top and sides of the shipping box.

http://www.hep.princeton.edu/~mcdonald/mumu/target/apr0507/Picture069.jpg

the imaging fibers, with the Al cover plate off for the optics test.

http://www.hep.princeton.edu/~mcdonald/mumu/target/apr0507/Picture077.jpg

the primary pressurization test

http://www.hep.princeton.edu/~mcdonald/mumu/target/apr0507/Picture078.jpg

Michael Lazzaroni replaced the bent eyebolt with an M6 bolt + washer => snout supported by cables again.

http://www.hep.princeton.edu/~mcdonald/mumu/target/apr0507/Picture080.jpg

http://www.hep.princeton.edu/~mcdonald/mumu/target/apr0507/Picture083.jpg

shows S buckling of the heater leads due to the relative motion of rubber collar and snout.

http://www.hep.princeton.edu/~mcdonald/mumu/target/apr0507/Picture084.jpg

shows how the rubber collar is now 15" long. It was probably originally

about 12" long. The new collar, shown below, is only 11" long. Some of

the spirals of the collar have been stretched a lot!

http://www.hep.princeton.edu/~mcdonald/mumu/target/apr0507/Picture085.jpg

http://www.hep.princeton.edu/~mcdonald/mumu/target/apr0507/Picture086.jpg

top view of the primary flex couplings after sliding the rubber collar off.

I was able to tighten the clamp on the larger coupling by more than 1 turn.

http://www.hep.princeton.edu/~mcdonald/mumu/target/apr0507/Picture089.jpg

Side view of the flexible couplings. It looks to me as if the feedpipe from

the syringe has been bent downwards. Looking into the secondary box thru

the lexan lid, it also looks like the pipe up from the syringe is not vertical => possible bending of the 90-bend just after the syringe port.

=> this joint could leak under the 40 bar pressure needed for 20 m/s jet.

Proceed with caution in May when we exercise the mercury loop.