BaBar LST Upgrade Richard F Boyce

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BaBar LST UpgradeRichard F Boyce

• Ohio State University Meeting 24-26 April 2003

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The BaBar Detector consists of a central barrel
with a pair of doors at each end
Rear Doors
Barrel
Forward Doors
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A section through the detector shows its
complexity
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The BaBar Barrel Calorimeter is supported by four
cantilevered arms
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The 3 and 9 oclockcorner plates supportthe
Barrel Calorimeter
Lets replace the top and bottom chambers
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This is the barrel calorimeter support to be
removed
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The plates sagunder gravity load,this increases
withthe brass load
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How much does the detector change shape with the
removal of the corner plates?Less than 0.2 mm!
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Make a work platform to remove the old RPCs
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View of top work platform without BaBar
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Side view of top work platform