Electrical QA Markus 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 APV25 chips Front-end hybrids Rad-hard DC/DC converters Analog level translation, data sparsification and hit time reconstruction Unified Belle II DAQ system ~2m copper cable Junction box ~10m copper cable FADC+PROC Unified optical data link (>20m) Finesse Transmitter Board (FTB) COPPER
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 QA3
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 QA4
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 QA5
Ladder Test 19 March 2012M.Friedl (HEPHY Vienna): Electrical QA6 Option B Subset of Belle II SVD 1/20 test system would be sufficient Requires 9U VME crate
Ladder Test 19 March 2012M.Friedl (HEPHY Vienna): Electrical QA7 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 ( 90 Sr) Can scan all sensors Fully automatic operation (overnight) Laser not recommended as it cannot reach strips underneath ribs Software To be adapted for tests and scanning 19 March 2012M.Friedl (HEPHY Vienna): Electrical QA8