babar: the detector richard f boyce 21 october 2003
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![Page 1: BaBar: The Detector Richard F Boyce 21 October 2003](https://reader036.vdocument.in/reader036/viewer/2022081519/56649d5e5503460f94a3e25e/html5/thumbnails/1.jpg)
BaBar:The Detector
Richard F Boyce 21 October 2003
![Page 2: BaBar: The Detector Richard F Boyce 21 October 2003](https://reader036.vdocument.in/reader036/viewer/2022081519/56649d5e5503460f94a3e25e/html5/thumbnails/2.jpg)
The BaBar Flux Return at Kawasaki in Japan
![Page 3: BaBar: The Detector Richard F Boyce 21 October 2003](https://reader036.vdocument.in/reader036/viewer/2022081519/56649d5e5503460f94a3e25e/html5/thumbnails/3.jpg)
A cross-section showing the BaBar sub systems: Flux Return, Solenoid,
Barrel Calorimeter, DIRC, Drift Chamber, Vertex Detector,
and the Endcap Calorimeter
e-
END D OOR FLUX RETURNPL ATE SEGMENTATION(9)20MM THK PLATES(4)30MM THK PLATES(4)50MM THK PLATES(1)100 MM THK PLATE
CABLES
L MAGNETC
FCAL
FORWARD END PLUG
Q5
FLOOR
COUNTERWEIGHT
Q4Q2
CA BL ES
DEWAR
D.C.ELECT.
DIRC
REMOVABLEHORSESHOE
C
DIRCELECT.
HORSE COLLARASSEMBLY
e
STAND-OFFBOX
+
D.C.ELECT.
SVT
STATIONAR Y WEDGE
C
Q4Q5
DIRCELECT.
CURTAIN WALL
RESISTIVE PLATECHAMBERS IN GAPS(19)PLANESIN BARREL(18)PLANESIN END DOORS
CYLINDRICAL RESISTIVEPL ATE CHAMBER
BARREL CALORIMETER
DIRC PMT SHIELD
DRIFTCHAMBERCABLES
1555
Q2
FLUXRETURN
SUPERCONDUCTING SOLENOID
CABLES
DRIFT CHAMBER
2295
CA BL ES
RPC Layer 18 is trapped behind 2 flux bars
RPC HV and gas lines are hidden behind the corner plates
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The flux return barrel assembly started with the cradle
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Each sextants weighed more than 50 tons and had to be split into two sections
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The second section of the bottom sextant is added to the assembly
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This is a picture of the section filled with RPC’s and ready for assembly
Notches were HV and gas lines are run
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Side sextant being assembled
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Top sextants being added
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Bottom and side sextants assembled
Flux bar trapping RPC Layer 18
Notch for HV and gas lines
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Arch added to stiffen the structure for earthquake loads
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Instrumented Flux Return ready for the other sub systems
Earthquake isolators to limit the lateral forces
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The superconducting solenoid comes out of the plane
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And goes into the barrel
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Next add thebarrel calorimeter
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The DIRC with its water tank is added at the backward end of
the barrel
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DIRC water tank which holds photomultiplier tubes
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The Drift Chamber is added
Bill SandsDrift Chamber
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This is the Vertex Detector and Final Focus Magnets with the cover off
About 15 feet
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Top view of the Endcap Calorimeter being added at the forward end
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Finished detector with platforms and services