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Electrical QAMarkus Friedl (HEPHY Vienna)
IPMU, 19 March 2012
Readout Chain Overview
Analog APV25 readout is through copper cable to FADCs
Junction box provides LV to front-end
19 March 2012M.Friedl (HEPHY Vienna): Electrical QA 2
1748APV25chips
Front-endhybrids
Rad-hardDC/DC
converters
Analog level translation,data sparsification andhit time reconstruction
Unified Belle IIDAQ system
~2mcoppercable
Junctionbox
~10mcoppercable
FADC+PROCUnified optical
data link (>20m)
Finesse Transmitter Board (FTB)
CO
PPER
Layer 6 Origami Ladder
5 DSSD sensors (4 rect + 1 slanted), 10 hybrids in total
6 hybrids (=connectors) read out in BW, 4 read out in FW
19 March 2012M.Friedl (HEPHY Vienna): Electrical QA 3
Testing
Option A: read out one sensor at a time APVDAQ: Needs 3 VME modules + repeaters
One set reads 4 APVs: 2 needed for p-side (6 APVs) with special cable (we can provide it) and one for n-side (4 APVs)
Option B: read out full ladder at once Reading out full ladder would require 15 APVDAQ
sets Alternative: use subset of final system (“1/20
system”) Enough to read out full ladder at once
19 March 2012M.Friedl (HEPHY Vienna): Electrical QA 4
Ladder Test
Option A APVDAQ – 4 APV input
channels Needs 3 sets to read
out one DSSD with special adapter cable
19 March 2012M.Friedl (HEPHY Vienna): Electrical QA 5
Ladder Test
19 March 2012M.Friedl (HEPHY Vienna): Electrical QA 6
FADCController
SVDBuffer
SVDBuffer
FADC
FADC
JunctionBox
JunctionBox
FTB
FTB
Hybrid Hybrid
Finesse
Finesse
4th crate3th crate
TTD
Finesse
Finesse
FTB
FTB
FADC
FADC
Bus Backplane
Bus Backplane
CLK,timing
FADCVME Crate
FADCVME Crate
DOCK
Option B Subset of Belle II SVD 1/20 test system
would be sufficient
Requires 9UVME crate
Ladder Test
19 March 2012M.Friedl (HEPHY Vienna): Electrical QA 7
Option B Exactly what
we have as a prototype system since 2007
Has been used in several beam tests
New system (with junction box instead of repeaters) is now being designed
Additional Infrastructure Test box
Closed box (light tight) with x/y stage and beta source (90Sr)
Can scan all sensors Fully automatic
operation (overnight) Laser not recommended
as it cannot reach stripsunderneath ribs
Software To be adapted for tests
and scanning19 March 2012M.Friedl (HEPHY Vienna): Electrical QA 8