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Status Wuppertal

Status Wuppertal. Opto-Electronic Readout Systems for SLHC. Tiny Outline. Current ATLAS Pixel system Data rates Possibilities in Wuppertal. ATLAS Pixel System. 1744 Modules of 46080 sensor cells Per 6/7 Modules one ‘opto-board’

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Status Wuppertal

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  1. Status Wuppertal Opto-Electronic Readout Systems for SLHC

  2. Tiny Outline • Current ATLAS Pixel system • Data rates • Possibilities in Wuppertal SLHC OLink Status Wtal

  3. ATLAS Pixel System • 1744 Modules of 46080 sensor cells • Per 6/7 Modules one ‘opto-board’ • Electr. connection module <-> opto-boardvia self-bundled ‘type0’ cables • Aluminium wires for LV-supplies and • Twisted pair Al wires for data(150µm, 70Ohm, Polyfil (Zug, CH) • A Kapton circuit serves as patch panel, connecting type0 cables and optoboard SLHC OLink Status Wtal

  4. opto-board • BeO carrier (OSU) with • receiving and transmitting asics(OSU & Siegen) • Truelight VCSEL- & PiN-arrays • VCSELs are oxide-confined • Irradiated to 1015 n 1MeV equiv SLHC OLink Status Wtal

  5. Fibres • Ctrl: 50µm GRIN -> 50µm SIMM • Data: 50µm SIMM -> 62.5 GRIN • Complete cables ordered at Ericsson & Diamond (Losone,CH) • One Ctrl fibre and one or two Data fibres per module SLHC OLink Status Wtal

  6. Off Detector • Wuppertal adapted the SCT design to pixel needs • Reduced number of channels • Higher data-rates • Reuse of the opto-interfacing asics and same Truelight Vcsel- & PiN-arrays (8way instead of 12way) SLHC OLink Status Wtal

  7. Data rates • Pixel is NOT part of Level1 Trigger • Rough calculation per Module (of 1744): Raw data: 50000 cells x 40MHz x 0.1% Occu. x 25Bit/Hit = 5·1010 Bit/s Trigger LVL1 reduction: 50000 cells x 100kHz x 0.1% Occu. x 25Bit/Hit = 1.25·106 Bit/s And we would like to reduce the pixel size (== increase numbers of pixels per module) SLHC OLink Status Wtal

  8. Data Format • Ctrl. is encodes as BPM, combining 40MHz clock and ctrl stream • Decoded on opto-board • Data is NRZ with 40MHz, 80MHz or 2x80MHz • No encoding SLHC OLink Status Wtal

  9. Ideas in Pixel Community • Replace B-Layer ~2012 • This might serve as a nice ‘test-bed’ for an intermediate step for opto-link, too. • Focuses more on detector module, for now. But these changes might need higher data rates. SLHC OLink Status Wtal

  10. Ideas in Wtal • How can Pixel contribute to the trigger? • On-detector ideas • Data-link • Off-detector electronics • Packaging • Depending on the electrical frequencies needed, the will be a need of a very high quality substrate -> MCM-D • Silicon carrier for high definition micro-strip lines Full featured MCM-D pixel detector module (16 Front-End ICs and Ctrl chip on sensor-tile, Which is acting as substrate for intra-connections SLHC OLink Status Wtal

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