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Software Team and Support for Production

Software Team and Support for Production. David Hutchcroft. Staff. David Hutchcroft (Liverpool) Girish Patel (Liverpool) Tara Shears (Liverpool) Mark Tobin (Liverpool) David Jones (Liverpool) Kurt Rinnert (Liverpool) Lisa Dwyer (Liverpool/PhD student) Ronan McNulty (UCD)

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Software Team and Support for Production

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  1. Software Team and Support for Production David Hutchcroft

  2. Staff • David Hutchcroft (Liverpool) • Girish Patel (Liverpool) • Tara Shears (Liverpool) • Mark Tobin (Liverpool) • David Jones (Liverpool) • Kurt Rinnert (Liverpool) • Lisa Dwyer (Liverpool/PhD student) • Ronan McNulty (UCD) • Karol Hennessy (UCD) D. Hutchcroft

  3. VELO software project • The VELO software team is based both at Liverpool, Glasgow, UCD and CERN • UCD have associate membership of LHCb and have collaborated with Liverpool over many years • Task are split • Liverpool is leading the digitisation and reconstruction effort and description of the detector • Glasgow is leading the alignment and simulation effort • All are responsible for testbeam analysis of final detector (called ACDC) • Software staff support ALL aspects of the build D. Hutchcroft

  4. Core Tasks • Tracking • Pattern recognition • 2D and 3D • Track fitting • Kalman filter based track fit • Alignment • Measuring and correcting the sensor positions • Raw data formats • Simulation of data stream output • Interpretation of raw data stream • Monitoring • Making plots to monitor reconstruction performance • Monitoring of detector conditions and position D. Hutchcroft

  5. Physics analysis • Velo is both “VErtex LOcator” and main tracking detector • 8 times as many sensitive planes as rest of the detector! • Need to optimise code for B vertex reconstruction • Proper time resolution for Bs mixing • Vertex position and mass resolution for S/B rate improvements • Trigger optimisations to improve 2D and 3D identification of B vertices • When LHCb data is available • measurement of CKM angles • measurement of b hadron properties • searches for decay rates modified by supersymmetry D. Hutchcroft

  6. Module production • Test on sensors, pitch adapters, hybrids, beetle chips and supports • All data from tests logged in database and analysed to check within tolerances • Girish Patel, David Hutchcroft, Tara Shear and Lisa Dwyer • Tests are performed on Beetle chips after bonding to hybrids • Get noise rates • Last chance to reject bad chips • Mark Tobin, Kurt Rinnert and Girish Patel • Laser tests are performed on finished modules • Check every sensor channel is bonded • Check sensor response across full surface • Look for induced shorts between channels • Mark Tobin, Kurt Rinnert and Girish Patel D. Hutchcroft

  7. Tests after construction • Burn in tests • Use a TELL1 readout board to run the sensors in the vacuum tank at Liverpool • Repeat the burn in at CERN • Karol Hennessy, Mark Tobin, David Jones and Kurt Rinnert • ACDC • After modules mounted on base plate at CERN • Read out (up to 5) modules with full readout electronics • Use testbeam to validate reconstruction code • Get initial pass as to internal misalignments • CMM and testbeam reconstruction • David Hutchcroft, Mark Tobin, David Jones, Kurt Rinnert, Tara Shears, Lisa Dwyer, Karol Hennessy and Ronan McNulty D. Hutchcroft

  8. Summary • Software team will contribute to all aspects of the module qualification and testing • All of our team are already testing hardware components • Also analysing data taken from each of the component and module tests D. Hutchcroft

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