oktober 12, 2006
Helium leak test of a Detector Box. 
may 31, 2006
Leak test of a real Detector Box in a vacuum vessel. There will be 2 mbar of Helium in the Detector Box for leak testing.
Document: leak test procedure 
february 26, 2002
    Three Al foils, 200 micron thick, has been leak tested with 15 mbar Helium under the foil and a He poluttion detector on the outside. Foil [1-2] were 'Cold formed' in 19 forming steps (3 molds needed). Foil [3] was 'Super plastic formed' in 1 forming step at 520 degrees.
    foil [1-2]
    Cold formed    		 leakrate [mbar l/s]

    7.0 E-8 -> 7.0 E-7
    1 corner= 8.0 E-5

    background = 2.3 E-8

    		leakrate [mbar l/s]

    2.1 E-7

    background = 2.3 E-7

    foil [3]
    Super plastic formed    		 leakrate [mbar l/s]

    9.8 E-6 -> 2.0 E-5

    background = 2.7 E-7 

january 17, 2002
    The foil has been leak tested with 15 mbar Helium under the foil and a He polution detector on the outside. The leak rate is about 1.10E-6 mbar.liter/sec at the inside corners.

    Three samples of the foil are viewed in a electron microscope to see how the material looks after the extreem deformation:
    neutraloutside cornersInside corners
LINKS TO RELATED SITES