The design is based on two individual detectors. Each detector
has its own feedthrough flange. The two detector boxes are 
interchangeable. A centerframe supports the two detectors 
after installation in the vacuumtank. Problem is the stiffness
of the centerframe which has one 'hanging' support. 
An other problem is the RF shielding which is very difficult
to 'close' in this design.

Comments:

FEA results: to obtain sufficient stiffness of center frame,
		a rather complex structure needs to be used 
		reduced space and accessibility

MAFIA: WF suppressors on sides of the two detector boxes are needed
		Not easy to find a solution with current 
		design because center frame is “in the way”
		and because of the fact that the two boxes 
		are mounted separately into the tank

Dynamic vacuum: we must have the option to insert a Titanium evaporator
		not easy with current design
		must enter from the front of tank and, again,
		center frame is “in the way”

Pictures:

Si detectors	Total design	Center frame	Vacuumtank