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 200 micron resolution 8 bit, 250 MSPS with log amp 10 bit dE/dx 5760 Forward Drift Cathodes ? MSPS ? bit, positive signals

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

Xilinx schematic

Mixed VHDL & Graphics

Robotic Selective Assembly

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

Cockcroft-Walton PMT base