The Need For Speed

• A goal of NTP is understanding turbulent transport (and subsequent loss) of energy and particles in the core of tokamaks, believed caused by plasma microinstabilities

• Small production runs
  • Study effects of velocity shear on a microinstability

  • 32x32x16 grid
    606797 particles
    5000 timesteps (nonlinear saturation)

  • O(10) hours on C90 (1 CPU)
    • 114 MFLOPS, 110 are vector ops

    • average vector length 91.24

• Desired production runs, est. from NTP proposal parameters
  • moderately large tokamak

  • run to transport time (100-1000x nonlinear saturation time)

  • C90 hours

• SPP allocation on C90 is not enough

• Not enough C90 memory for some near-term runs

Generated with CERN WebMaker