LHCb Hybrid to Pedestal
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LHCb Hybrid to Pedestal John Carroll
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LHCb Hybrid to Pedestal. John Carroll. Metrology. Top of Silicon. This side is Paddle and R side. R to Phi face to face Width 1.995mm. R to Phi face to face Width 2.017mm. Tilt on left side From CL 0.367mm. Tilt on right side From CL 0.443mm. Hybrid. Tilt of Hybrid. - PowerPoint PPT Presentation
Transcript of LHCb Hybrid to Pedestal
LHCb Hybrid to Pedestal
John Carroll
John Carroll – VELO PRR
Metrology
John Carroll – VELO PRR
Top of Silicon
This side is Paddle and R side
R to Phi face to faceWidth 2.017mm
R to Phi face to faceWidth 1.995mm
Tilt on left sideFrom CL
0.367mmTilt on right side
From CL 0.443mm
John Carroll – VELO PRR
Hybrid
John Carroll – VELO PRR
Tilt of HybridLeft side leans 221μm
Right side leans 216 μm
John Carroll – VELO PRR
?
John Carroll – VELO PRR
Detector Plane
-53μm0μm
-10μm
+172μm
John Carroll – VELO PRR
Top of Paddle
John Carroll – VELO PRR
Position of Face
Nominal distance from CL to face 0.56mmDistance on existing Pedestal 0.44mm
John Carroll – VELO PRR
Summary 1) Hybrid leans ~220 μm (away from
paddle) 2) Paddle face offset in Z by 120 μm 3) Existing twist in hybrid (for hybrid
#45 70 μm) 4) Accuracy of video measurement
using focus ±10 μm
