Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2003-05-30
Physics
Nuclear Physics
Nuclear Experiment
Talk from the 2003 Computing in High Energy and Nuclear Physics (CHEP03), La Jolla, Ca, USA, March 2003, 10 pages, pdf from MS
Scientific paper
The Time-of-Flight system is a proposed addition to the STAR detector currently installed at RHIC. The proposal is based on a new technology called the Multi-gap Resistive Plate Chamber (MRPC), and consists of approximately 23,000 channels of detectors distributed over 120 trays. Each TOF tray consists of 192 detector channels and three different types of electronic circuit cards, called "TFEE", "TDIG", and "TCPU", listed in order of the data flow. Every fourth tray also contains a "TMIT" card that transmits the data over a fiber to the TDRC which is part of STAR DAQ. The TFEE contains the analog front end electronics. The output of TFEE is passed to the TDIG, where the data are digitized (using the CERN HPTDC ASIC). The TCPU formats and buffers the digital detector information. This formatted data is passed to TMIT, which transmits it over an optical fiber to the data receiver TDRC in the STAR DAQ room. The architecture of this readout chain and DAQ will be described, and first results from prototypes of the component boards will be discussed.
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