SVD Slow Control Markus Friedl (HEPHY Vienna) DAQ/SC Kickoff Meeting, 8 November 2012

8 November 2012M.Friedl (HEPHY Vienna): SVD SC2 Introduction Slow Control Summary

SVD 8 November 2012M.Friedl (HEPHY Vienna): SVD SC3 APV25 chips Cooling pipe Origami ladder Sensor underneath flex circuit Pitch adapter bent around sensor edge End ring (support)

Belle II SVD Key Parameters  4 layers (L3…L6) of double-sided silicon strip detectors  Straight barrel part with one slanted forward sensor (L4…L6)  1.14 m 2 silicon  223,744 channels (twice as many as in Belle I SVD)  Cluster Signal/Noise = 14 (p-side), 24 (n-side)  Time resolution = 2 (n-side), 3 (p-side) ns RMS  Occupancy < 5%  30kHz maximum trigger rate with dead time <0.5%  CO 2 cooling  0.55% X 0 overall material budget per layer 8 November 2012M.Friedl (HEPHY Vienna): SVD SC4

Opened SVD 8 November 2012M.Friedl (HEPHY Vienna): SVD SC5  Shown:  Fully populated L3  One ladder for each L4…L6

8 November 2012M.Friedl (HEPHY Vienna): SVD SC6 Introduction Slow Control Summary

General Assumptions (open for discussion)  Run Control (initialize, start run, stop run, internal calibration, …)  Handled internally by SVD following global signals presumably issued through NSM  Data quality monitoring (checking pedestals, noise, hit rates etc. during run)  Handled by DAQ and/or SVD internal monitoring in parallel  “Classical” Slow Controls (voltages, currents, temperatures, … – typically done with LabView on a smaller scale)  Handled by EPICS 8 November 2012M.Friedl (HEPHY Vienna): SVD SC7

Slow Controls – Power  Kenwood Power Supplies (GPIB interface + PC)  96 LV + 18 HV channels each with  Set voltage, measured voltage, current limit, measured current  Need to turn on/off LV and HV, read and clear error  DOCK Box (controlled/measured through FADCs)  384 DC/DC converters need to be enabled/disabled  Monitoring each converter output voltage and power good  Measuring  bias currents of each sensor (384 channels)  Optional: measuring one temperature on each of the 48 FADCs 8 November 2012M.Friedl (HEPHY Vienna): SVD SC8

Slow Controls – Temperature  CO 2 cooling plants  Cooling plants are systems including their own sensors  Manifolds  Are the valves and sensors (including mass flow meters?) controlled/read out by CO 2 plants or do we install another PLC (or something else)?  Front-End – not really defined yet  Will need rad-hard temperature sensors (presumably Pt100[0] or thermocouples) for  Cooling lines  Environment 8 November 2012M.Friedl (HEPHY Vienna): SVD SC9

Monitoring – Front-End  Not defined yet, but can assume a O(10) for each sensor type  Presumably also interesting for PXD, thus we should make common effort (as already started with humidity)  Humidity  Problem: radiation hardness – maybe optical fiber?  Backup solution: sensors in exhaust pipes outside detector  Radiation  Instantaneous dose rate? – PIN diodes?  Total dose – RADFETs  Distance (Omegas) between PXD and SVD  Anything else? 8 November 2012M.Friedl (HEPHY Vienna): SVD SC10

8 November 2012M.Friedl (HEPHY Vienna): SVD SC11 Introduction Slow Control Summary

 EPICS for the Belle II slow control  I assume that Run Control and Data Quality Monitoring are not part of EPICS  Tasks for EPICS slow control  LV Power & bias switching and monitoring  Temperature monitoring (CO 2 plants, valves, front-end)  Humidity  Radiation  Distance (Omegas)  Anything else? 8 November 2012M.Friedl (HEPHY Vienna): SVD SC12