The current SciDAC portfolio consists of 2 SciDAC Institues and 29 SciDAC Partnership projects with a total funding of up to $53M/year.
The fusion kinetic code XGC demonstrates generation of high-amplitude blobby plasma turbulence in the edge region of tokamak in contact with material wall.
Blobs are coherent nonlinear structures that could carry significant amount of fusion fuel particles out of the confined core region toward material wall.
Around and outside the magnetic separatrix (depicted by solid line), strong turbulent eddies are shaped like unconnected "blobs."
Inside the magnetic separatrix, the weaker turbulence eddies are shaped like connected "streamers."
Understanding and controlling the blob-type edge turbulence is one of the key questions in the magnetic fusion physics research.
The simulation took 2 days on full-scale Titan (Oak Ridge Leadership Computing Facility) consuming about 20 million hours of INCITE time,
with support from the Office of Fusion Energy Sciences and Advanced Scientific Computing Research through SciDAC.
Cover image, Physics of Plasmas, 25, 056107 (2018)