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GlueX Flash ADCs

3425 PMT channels Forward, Barrel Calorimeters Energy Sum for L1 trigger Tagger, Start, Veto, TOF, Cerenkov CW beam No crossing signal 500 MHz buckets 500 MSPS $80 250 MSPS, 8 bit FADC chip $20 Dynamic range adequate < 400 ps timing achievable. 3360 Central Drift Anodes

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GlueX Flash ADCs

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  1. 3425 PMT channels Forward, Barrel Calorimeters Energy Sum for L1 trigger Tagger, Start, Veto, TOF, Cerenkov CW beam No crossing signal 500 MHz buckets 500 MSPS $80 250 MSPS, 8 bit FADC chip $20 Dynamic range adequate < 400 ps timing achievable 3360 Central Drift Anodes 200 micron resolution 8 bit, 250 MSPS with log amp 10 bit dE/dx GlueX Flash ADCs • 5760 Forward Drift Cathodes • ? MSPS • ? bit, positive signals

  2. Single channel FADC prototype Test bed for: • SPT converter chip • Xilinx chip and software • Mentor PCB & FPGA software • Intellectual Property (PCI core) • Robotic assembly

  3. Xilinx schematic

  4. Mixed VHDL & Graphics

  5. Robotic Selective Assembly

  6. Next (final?) version Energy sum Ethernet Small Xilinx FADC Xilinx V2PRO Clock/ Sync 6U PICMG 2.16

  7. Cockcroft-Walton PMT base

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