SCT Digitization Task Force

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CERN
Taka Kondo, shaun roe
Description
Title: SCT Digitization Task Force Community: ATLAS Password: sctdtf Meeting Access Information: - Meeting URL http://evo.caltech.edu/evoNext/koala.jnlp?meeting=MeMMMu2M2uD9D89M9uDv9e - Password: sctdtf - Phone Bridge ID: 2271662 Password: 2047 Central European Summer Time (+0200) Start 2010-09-07  14:30 End   2010-09-07  17:00 Japan Standard Time (+0900) Start 2010-09-07  21:30 End   2010-09-08  00:00 Eastern Daylight Time (-0400) Start 2010-09-07  08:30 End   2010-09-07  11:00 Pacific Daylight Time (-0700) Start 2010-09-07  05:30 End   2010-09-07  08:00 EVO Phone Bridge Telephone Numbers: --------------- - USA (Caltech, Pasadena, CA) +1 626 395 2112 - Switzerland (CERN, Geneva) +41 22 76 71400 - Slovakia (UPJS, Kosice) +421 55 234 2420 - Italy (INFN, several cities) http://server10.infn.it/video/index.php?page=telephone_numbers Enter '4000' to access the EVO bridge - Germany (DESY, Hamburg) +49 40 8998 1340 - USA (BNL, Upton, NY) +1 631 344 6100 - United Kingdom (University of Manchester) +44 161 306 6802 - Australia (ARCS) +61 Adelaide  08 8463 1011 Brisbane  07 3139 0705 Canberra  02 6112 8742 Hobart    03 623 70281 Melbourne 03 8685 8362 Perth     08 6461 6718 Sydney    02 8212 4591 - Netherlands (Nikhef, Amsterdam) +31 20 7165293 Dial '2' at the prompt - Canada (TRIUMF, Vancouver) +1 604 222 7700 - Czech Republic (CESNET, Prague) +420 95 007 2386 - USA (MIT, Cambridge, MA) +1 617 715 4691 - France (RAP, Paris) +33 144 27 81 50
Participants
  • Craig Buttar
  • Elisa Piccaro
  • Jan Kaplon
  • Pat Ward
  • Patricia Ward
  • Rei Tanaka
  • Rei Tanaka
  • Reisaburo Tanaka
  • Richard Batley
  • Richard Batley
  • Shaun Roe
  • steve mcmahon
  • Taka Kondo
  • Takahiko Kondo
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SCT Digitization Task Force (07 Sep 2010)
Present: Richard Batley; Richard Batley; Craig Buttar; Jan Kaplon; Taka Kondo; Takahiko Kondo; steve mcmahon; Elisa Piccaro; Shaun Roe; Rei Tanaka; Rei Tanaka; Reisaburo Tanaka; Pat Ward; Patricia Ward
Chaired by: Dr. roe, shaun; Prof. Kondo, Taka

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ABCD Chip parameters relevant to simulation
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Jan Kaplon presented the impedance model for the input stages of the abcd chip. The original simulation package unfortunately can no longer be run; the package has been updated and the libraries for DMILL are no longer available. Therefore Jan showed the results of a simplification to the circuit which is good enough for our purposes. This shows that while the crosstalk more closely resembles the differential cross talk already used, there are small differences.



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Timing treatment in the SCT
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Taka Kondo explained the various modes of operation of the abcd: dicriminator edge detection, the three bin timing selection and the data transmission compression level. THere was a fruitful discussion in which Jan Kaplon explained fully the emaning of the edg detect for the discriminator: When edge detect is enabled, any pulse passing threshold in the 25ns time bin will fire the discrimator. With edge detect disabled, only those pulses which pass the discrimator level in coincidence with the 25ns clock edge will fire the discriminator. This explains the observed large difference in noise occupancy between the two modes: edge detect increases the noise occupancy by factor ~ 3



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Simulations using an induced charge map
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Richard Batley presented the results of simulation comparing the existing Athena simulation with that using the induced charge map from Taka Kondo. The two look remarkably similar

 

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