I have a student working on the design of the "base" boards that will house the silicon photomultipiers for the tagger microscope. We call them base boards because their function is similar to the Cockcroft-Walton bases being used for the FCal phototubes. The microscope has 500 fibers being read out by 500 SiPMs, each of which has its own individually controlled bias voltage. Besides providing programmable voltage levels to the SiPM bias circuits, the base board also houses preamplifiers for the SiPM signals. The design also includes readout of the local temperature and supply voltage on the board, because it is simple and cheap to do. The student has created a nice web page showing his work on the design. He also has created some nice tutorial pages on VHDL modeling which other groups may find useful for their own students. Most of the digital design has been completed and simulated. We hope to have a prototype by the end of the year. http://zeus.phys.uconn.edu/wiki/ and go to the link "Design and prototyping of SiPM electronics". Richard Jones
S/MIME Cryptographic Signature