home                 consulting                products & tools                 clients                 about 


logo

(781) 454-7648
  info@RockfieldResearch.com

    Developed under a DOE SBIR for the MIT Alcator C-Mod Tokamak fusion experiment Lower Hybrid klystron array, the Transmitter Protection System is a flexible multi-tube control and fault monitoring system, housed in a cPCI format.  Shown below are the main assembly and the RTM I/O assembly (front & back views).
           TPS01

        Transmitter
           Protection
               System  v01
tps1
    The system services four klystrons, monitoring three current channels, two RF diode channels, and two waveguide arc channels per tube - with spare channels available.  A realtime collector temperature predictor feature provides additional tube safety.  Onboard emulation of ASQUIRT and DSQUIRT F/O expand the I/O fields considerably.  A 96 bit event logger preserves all fault and control bit changes with microsecond accuracy into a 2048 deep event memory.

    As a generic control unit, it has sixteen current channel inputs, each buffered, routed to test points and digitizer outputs, and checked via three comparators (one remotely programmable for reference level).  It has four pairs of RF diode inputs, all eight signals buffered and routed to digitizer input, with four ratiomatic fault comparators at programmable fault trip levels.  Other features include twelve F/O coupled fault signal inputs and 30 additional F/O I/O channels for configurable control.  I/O channels and comparators are routed through a matrix of 3 on-board ARM7 processors and two 100 pin CPLDs for maximum configurability and fault response speed.

Configuration setup and event download communications are via Ethernet (independent of cPCI backplane).



  Call Rockfield Research
       to discuss
           your application.






      click here to
      download the
      manual for the
      Alcator C-Mod
      TPS system (2.7MB)
tps2

(see also TPS02 for continuously operating systems, such as radar transmitters)
_________________________________________________________________________

optics                  electronics                 controls                big data                  contact