Readout Electronics for D0 and the Linear Collider

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Readout Electronics for D0 and the Linear Collider
DOE EPSCoR Review Eckhard von Toerne for the
Kansas State HEP Group February 25, 2003 The
talk is also available at http//www.phys.ksu.edu/
evt
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History Overview

• KSU participated in D0 Run2A silicon electronics
• (Bill Reay, Ron Sidwell, Noel Stanton, EDL)
• Interface Boards
• Adapter Cards
• HTI testing
• Maintenance of Run2A Electronics
• D0 Electronics Involvement continues
• B. Reay replaced by EVT as Level 3 Electronics
  Manager, PostDoc Kristian Harder joined group

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Run2b Electronics Upgrade
Run 2A
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Differences between Run 2a / 2b Electronics

• SVX4 power supply voltage
• AVDD 5V -gt AVDD 2.5 V , AVDD2 removed
• Signal level translation 5 V 2.5 V necessary
• New Voltage regulation scheme with tight range
• Mapping between SVX4 and SVX2 inputs
• Differential / Single-Ended translation
• Some changes in LV / HV power supplies, Upgrade
  of Interface Crates

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KSU Run2b Involvement

• KSU provides most of new Electronics
  Infrastructure
• We are involved in tests of
• Prototypes
• Readout software
• Full chain Readout and Purple Card/Full Chain
  comparison
• Future Involvement
• 10 test (large scale system integration)
• Noise studies with full readout chain for Layer 0
• Backup site for Run 2b hybrid testing
• Naming/Mapping
• Commissioning

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Prototyping

• Adapter Card
• Junction Card
• Jumper cable

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Electronics Tests

• New Test Card for a short readout chain -gt purple
  card
• Use in all burn-in, hybrid/module testing
• Built by KSU
• Why is it named Purple Card?

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Readout with Purple Card

• Plot of two hybrid readout in calinject mode
  (mask 0). 50K events with no readout error -
  which is typical performance in calinject mode.
  Data mode is still at about one error in 10k or
  20k events. Readout speed was 30-35 Hz. The large
  apparent noise in chip 4 is caused by occasional
  readouts of 255 ADC counts. Kristian

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Purple Card Test Results
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Hybrid Irradiation Tests

• Test of Hybrid radiation hardness at done in JRM
  Lab, KSU
• Hybrid survived 25 Mrad without significant
  increase in noise
• Observed larger channel-by-channel pedestal
  variation (addressed by changes in new SVX4
  version)

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More Tests with Purple Card

• Module readout (Fermilab)

(picture courtesy of A. Nomerotski)

• Module Laser test Done with purple card

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Project Status

• All KSU components have been prototyped and are
  functioning -gt boost for electronics testing
• Second protoypes are being designed to meet
  modified mechanical/space constraints
• Purple Cards passed Production Readiness Review
  with Success
• Readout software has been debugged at KSU and
  Fermilab -gt better comparisons of full chain and
  purple card readout.

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Future PlansLinear Collider Involvement

• Calorimetry of high energetic, collimated jets
  and the separation of jets from W or Z0
• Jet energy flow algorithms promise sufficient
  resolution, provided that
• finely segmented ECAL
• calorimetry coverage down to small polar angles
• One possible ECAL design is SiW
• Not done yet at a large scale
• Expensive

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Linear Collider RD

• Joint Venture with K.U. and K.S.U.
• K.U. got a head start, we are quite busy with D0
• Participate in simulations
• favorable manpower decision PostDoc K. Harder
  has experience in Tesla simulation studies
• Provide electronics expertise for K.U. plans