BaBar LST Upgrade Richard F Boyce

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Presentation transcript:

BaBar LST Upgrade Richard F Boyce Ohio State University Meeting 24-26 April 2003

The BaBar Detector consists of a central barrel with a pair of doors at each end Rear Doors Barrel Forward Doors

A section through the detector shows its complexity

The BaBar Barrel Calorimeter is supported by four cantilevered arms

The 3 and 9 o’clock corner plates support the Barrel Calorimeter Let’s replace the top and bottom chambers

This is the barrel calorimeter support to be removed

The plates sag under gravity load, this increases with the brass load

How much does the detector change shape with the removal of the corner plates? Less than 0.2 mm!

Make a work platform to remove the old RPC’s

View of top work platform without BaBar

Side view of top work platform