SVXII David Stuart UC Santa Barbara May 11

SVX-II David Stuart, UC Santa Barbara May 11, 2006

Outline • Why • What • How Many details in following talks, so I’ll just review the design goals and then give a tour of the detector and its construction.

Design goals • 132 ns • Rad-hard • Longer • Double-sided • Trigger-able 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.

SVT requirements • 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 SVX 3 D talk Now, I’ll describe the detector with a photo tour.

Bulkheads for mounting and cooling

SVXII Ladders Layer 1 Quarter Ladder Mounting tab Thermal bridge Be. O Hybrid glued to silicon 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

L Read o IS t n i e id l s o t y

…after some packaging

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 • 132 ns ? • Rad-hard • Longer ~ • Double-sided ~ • Trigger-able ! !