1. Preliminary thoughts on SVT services
What we have in the present BaBar SVT
What we might need for SuperB SVT
Giuliana Rizzo
INFN and University, Pisa
SuperB Workshop
Perugia, June
G. Rizzo-SuperB Workshop
SVT Services - Perugia, June

2. SVT Services - Perugia, June 18. 2009
SuperB SVT
Baseline
SuperB SVT  similar to the BaBar SVT (5 Layers) + Layer 0
Layer 0 technology: striplets or pixels (it could be a double layer)
Each SVT layer is built of independent “modules” (52+8x2)
Each module has 2 independent “half-modules” (FW/BW side)
Sensor, front-end chips, HDI with power/signal in and data out link
Front-end electronics require cooling: cooling pipes for each layer
SVT requires a dry stable environment: dry air/nitrogen pipe for each side
Humidity pipes politube
SVT Services to the IR (same for FW/BW side)
52x(2 power+1 signal) “front cables” + Layer0
4 in + 4 out cooling pipes + Layer0
2 pipes humidity sampling and regulation
Caables for radiation and position monitor
G. Rizzo-SuperB Workshop
SVT Services - Perugia, June

3. SVT Services - Perugia, June 18. 2009
BaBar SVT Front Cables
MUX
crate
Off detector
SVT front cables (same for FW/BW side): 52 (HM) x3 cables – 7.42 mm d.
2 power (p+n side) + 1 signal cables: Belden 12 1/2 pairs 24 AWG
 flexible cable with small diameter, voltage drop < 0.5 V
~ 20 m long splitted in two parts connected via Burndy connector.
The two cable parts have to be disconnected at their Burndy connectors for the endcap to be withdrawn and during the SVT/beam pipe insertion/removal
G. Rizzo-SuperB Workshop
SVT Services - Perugia, June

4. Details of the BaBar white cables
G. Rizzo-SuperB Workshop
SVT Services - Perugia, June

5. SVT Services - Perugia, June 18. 2009
Insert picture from Bill talk
G. Rizzo-SuperB Workshop
SVT Services - Perugia, June

6. Space Frame and Support Cones
BaBar has 4 brass cooling rings for the HDI’s
L1&L2 share the same cooling ring
4 ingoing cooling pipes + 4 outgoing cooling pipes goes to the IP
Splitted inside the ST to 4+4 in & 4+4 out
SVT is splitted in two halves for mounting
4+4 outgoing cooling pipes
4+4 ingoing cooling pipes
G. Rizzo-SuperB Workshop
SVT Services - Perugia, June

7. SVT Services - Perugia, June 18. 2009
BaBar SVT Support
Brass
cooling rings
Carbon fiber
Space Frame
4 cooling pipes for inlet
4 cooling pipes for outlet
22 cm
B1 dipole
permanent magnet
(inside support cone)
B1 dipole
permanent magnet
(inside support cone)
Carbon fiber
support cones
109 cm
Transition card location
G. Rizzo-SuperB Workshop
SVT Services - Perugia, June

8. SuperB Interaction Region Schematic SVT superimposed
Possible location of SVT Transition cards
G. Rizzo-SuperB Workshop
SVT Services - Perugia, June

9. First thoughts on services for SuperB-SVT
Layer 0 Half-Module current significantly higher than for BaBar module.(x5 worst case)
BaBar HM (p+n side) Ianalog=1.2 A, Idigi=1.2 A handled with 2 power cables 7.42 mm diam. each
Layer0 HM with Hibrid pixels: Idigi=6 A, Ianalog=70 mA (=BaBar X 2.5)
Layer0 HM with MAPS even worse Idigi=6 A, Ianalog=6 A (= BaBar x 5)
For Layer 0 need larger cables or more power cables/HM
DC-DC converter to reduce power constraints on cables?
Signal cables might be replaced by optical link, especially in Layer0 where a fast link is needed between HDI and DAQ board (20 Gbit/s – 3 Gbit/s)
No big impact in cable dimensions ?
Might have an impact on power consumption at the transition card
Cooling pipes + 2 (in+out) for Layer0
Additional cooling might be required at the transition card location (optical link)
Need to define location for transition card: different w.r.t BaBar matching cards (passive) have optical link on,board need to be in a relatively soft radiation area (30-50 cm from SVT)
G. Rizzo-SuperB Workshop
SVT Services - Perugia, June

10. SVT Services - Perugia, June 18. 2009
backup
G. Rizzo-SuperB Workshop
SVT Services - Perugia, June

11. SVT Services - Perugia, June 18. 2009
SVT cooling pipes
Silicon wafers
Carbon & Kevlar fiber support ribs
G. Rizzo-SuperB Workshop
SVT Services - Perugia, June

12. SVT Services - Perugia, June 18. 2009
The SVT consists of
~ channels
1188 chips
208 readout sections
104 half-modules, or 104 HDIs
52 HDI-Link cards
28 DAQ-Link cards
14 ROMs
G. Rizzo-SuperB Workshop
SVT Services - Perugia, June

13. BaBar SVT Data Transmission
HDI: High Density Interconnect. Mounting fixture and cooling for readout ICs.
Kapton Tail: Flexible multi-layer circuit. Power, clock, commands, and data.
Matching Card: Connects dissimilar cables. Impedance matching.
HDI Link: Reference signals to HDI digital common.
DAQ Link: Multiplex control, demultiplex data. Electrical -- optical conversion.
The BaBar SVT consists of
~150K channels
1188 chips
104 half-modules, or 104 HDIs
Double sided
208 readout sections (ROS)
52 HDI-Link cards
28 DAQ-Link cards
14 ROMs
Front
Cables
HDI
Matching
Card
Kapton
Tail
Si Wafers
Link
DAQ
Power
Supplies
MUX
Back
Fiber Optic
to DAQ
On Detetctor
Off Detetctor
G. Rizzo-SuperB Workshop
SVT Services - Perugia, June

14. SVT Services - Perugia, June 18. 2009
G. Rizzo-SuperB Workshop
SVT Services - Perugia, June