[email protected] edr @ epfl, 14.10.05 design and first prototype for a b eam p ipe d istance m...
Post on 19-Dec-2015
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[email protected] @ EPFL, 14.10.05
Design and first Prototype
for
a
Beam Pipe Distance Monitoring Safety Switch
[email protected] @ EPFL, 14.10.05
Requirements :
• Reliability of the system
„Fail-safe“ system
Simple principle of operation
• As little as possible additional material
As a careful touching of the beam pipe is permitted ....
[email protected] @ EPFL, 14.10.05
Beam Pipe Distance Monitoring both during installation and data taking
Top- and BottomBoxes
Side Boxes
Minimum distance : 7 mm !!
[email protected] @ EPFL, 14.10.05
First switch activated at 7 mm distance from the beam pipe signalSecond switch activated at 6.5 mm distance from the beam pipe alarm
Three switches under & at the front of the detector box
Three switches on top & at the front of the detector box
One switch at the side of the detector box
Each switch consistsOf two mettalic blades,Allowing a distance-Dependent signal
[email protected] @ EPFL, 14.10.05
Metall blade („finger strip“) :
Thickness 500 micronsBeryllium CopperSwitching precision < 0.250 mm
Foil around the beam pipe :
Thickness 100 micronsCopper
[email protected] @ EPFL, 14.10.05
Safety Switch for side boxes
Metallic foil
Stesalite piece & non magnetic blade
[Design model]
[email protected] @ EPFL, 14.10.05
Safety switch for top (and bottom) boxes
Metallic foil
Stesalite piece & non magnetic blade
[Design model]
[email protected] @ EPFL, 14.10.05
Next steps ...
Furhter tests with different finger strips
Detailed studies on electrical connection possibilities
Studies on optimal fixation points (on the detector boxes)