metrology Upgrade VELO - RF shield 13/08/2014 CERN Massimiliano Ferro-Luzzi 1

38 scans per data set:6 longitudinal scans over each central bulge nr 1 to 66 transverse scans over each bulge nr 7 to 127 transverse scans over each necknr 13 to 19repeat for other sidethickness obtained from comparison of both sides

I redefine "my axes"...

Thickness by precise metrology Thickness by precise metrology Thanks to Didier Glaude

metrology Upgrade VELO - RF shield 13/08/2014 CERN Massimiliano Ferro-Luzzi 2

seen from silicon detector sideseen from silicon detector side

longer neck

shorter neck

inscription(sample label)YDidier

XDidier

ZDidier

origin

Didier Glaude's coordinate system

X=0, top of flange Y=0, edge of flange Z=0, edge of flange

metrology Upgrade VELO - RF shield 13/08/2014 CERN Massimiliano Ferro-Luzzi 3

seen from silicon detector sideseen from silicon detector side

longer neck

shorter neck

inscription(sample label)z

x

y

origin

My coordinate system

x=0, top of flange y=0, edge of flange z=0, edge of flange

plot each y-scan offset by incremental +35mm for clarity