SVX-IISVX-IIDavid Stuart,

UC Santa Barbara

May 11, 2006

David Stuart,UC Santa Barbara

May 11, 2006

• Why

• What

• How

Outline

Many details in following talks, so I’ll just review the design goals and then givea tour of the detector and its construction.

• 132 ns

• Rad-hard

• Longer

• Double-sided

• Trigger-able

Design goals

The first 2 were required (well thought to be, vs 396 ns). The rest were desired.The last was critical for Bs mixing, and it drove the design.

• Wedge geometry

SVT requirements

• Wedge geometry

• Precision alignment during construction

• r and z

SVT requirements

• Wedge geometry

• Precision alignment during construction

• r and z

• Fast, deadtime-less readout

• See Ankush’s SVX3D talk

SVT requirements

Now, I’ll describe the detector with a photo tour.

Bulkheads for mounting and cooling

SVXII LaddersLayer 1 Quarter Ladder

BeO Hybrid glued to siliconMounting tab

Thermal bridge

HDI, with LV boost wires

Finger and jumper on next page

Fingers

Jumper bus to z-side

Reason for calling them ladders

Note folded cables

Assembled into barrels

Spacers to allow lid to close over cables

Ready to s

lide into

ISL

…after some packaging

• 132 ns

• Rad-hard

• Longer

• Double-sided

• Trigger-able

Recall Design goals

• 132 ns ?

• Rad-hard

• Longer

• Double-sided

• Trigger-able

Recall Design goals

• 132 ns ?

• Rad-hard

• Longer ~

• Double-sided

• Trigger-able

Recall Design goals

• 132 ns ?

• Rad-hard

• Longer ~

• Double-sided ~

• Trigger-able

Recall Design goals

• 132 ns ?

• Rad-hard

• Longer ~

• Double-sided ~

• Trigger-able ! !

Recall Design goals