Angela Di Virgilio from Pisa came by to visit GEO600. Here she takes a look at the assembly shop. (From l.t.r.: Karsten, Angela, Aniello, Benno, Mike.) Zoom Image
Angela Di Virgilio from Pisa came by to visit GEO600. Here she takes a look at the assembly shop. (From l.t.r.: Karsten, Angela, Aniello, Benno, Mike.) [less]

November 1998

Mike Plissi and Calum Torrie came to Hannover for a final design review of the modecleaner double pendulums. For the first time three complete stacks have been assembled, including motors and flex-pivots. The top-plates have been manufactured by Skodock; they were damped by partly filling them with graphite-doped RTV. A dummy mirror served to test the suspension. The result of this dry exercise was that the mechanical design is ok, up to a few little changes to be made by our workshop.

Benno and Kasem look how to fix the roundtables to the TCMa top plate lying on it's back. The top "plate" has evolved from a planar to a rather Escher-like structure. Zoom Image
Benno and Kasem look how to fix the roundtables to the TCMa top plate lying on it's back. The top "plate" has evolved from a planar to a rather Escher-like structure. [less]
Peter and Jochen look at the top plate hovering above the stacks. Zoom Image
Peter and Jochen look at the top plate hovering above the stacks.
Kasem and Benno put the top plate onto the stacks. Zoom Image
Kasem and Benno put the top plate onto the stacks.
Mike adjusts the fit of the top plate. Zoom Image
Mike adjusts the fit of the top plate.
This view shows the stacks mounted on the resp. holder plates. The large thick thread-poles hold the upper part of the tank after opening it. The small ones bear square plates for the lowering device. Zoom Image
This view shows the stacks mounted on the resp. holder plates. The large thick thread-poles hold the upper part of the tank after opening it. The small ones bear square plates for the lowering device. [less]
The lowering device consists of three beams and a round plate. The beams are fixed to the square plates. Zoom Image
The lowering device consists of three beams and a round plate. The beams are fixed to the square plates.

Stacks and Top Plate

After being equipped with all the intermediate masses and mirrors the top plates have to be inserted into the tank and placed onto the stacks. This sequence shows the device for the soft lowering of the top plates. The test run proved the feasibility of this concept.

Here the top plate is bolted to the lowering device. The stage is lowered by turning the nuts holding the square plates. (From l.t.r.: Mike, Benno, Calum, Peter.) Zoom Image
Here the top plate is bolted to the lowering device. The stage is lowered by turning the nuts holding the square plates. (From l.t.r.: Mike, Benno, Calum, Peter.) [less]
The top plate sits upon the stacks. Now the lowering device can be removed. Zoom Image
The top plate sits upon the stacks. Now the lowering device can be removed.
 
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