Mechanical and Cooling Specifications

Material

<1% X0 per measurement pair averaged over tracking volume

Sensor Temperature

<0C over entire sensor before irradiation

APV25 Temperature

<30C

APV25 Temperature Stability

constant within 3C during physics running

does not include chip to chip variations, which can be larger

Flatness

all sensors planar within 50 microns total

includes thermal deformation

Non-bend Alignment of planes

within 0.5 mrad for all modules on each side of dead zone

strips are projective to within 1 strip over entire solid angle

Stereo Angle Consistency

within 0.5 mrad of nominal in all layers

Bend-plane alignment stability

within 10 microns over all sensor surfaces during all running

Non-bend alignment stability

within 25 microns over all sensor surfaces during all running

Z alignment stability

within 50 microns over all sensor surfaces during all running