Final Technical Report for SBIR entitled FourDimensional FiniteOrbitWidth FokkerPlanck Code with Sources, for Neoclassical/Anomalous Transport Simulation of Ion and Electron Distributions
Abstract
Within the US Department of Energy/Office of Fusion Energy magnetic fusion research program, there is an important wholeplasmamodeling need for a radiofrequency/neutralbeaminjection (RF/NBI) transportoriented finitedifference FokkerPlanck (FP) code with combined capabilities for 4D (2R2V) geometry near the fusion plasma periphery, and computationally less demanding 3D (1R2V) bounceaveraged capabilities for plasma in the core of fusion devices. Demonstration of proofofprinciple achievement of this goal has been carried out in research carried out under Phase I of the SBIR award. Two DOEsponsored codes, the CQL3D bounceaverage FokkerPlanck code in which CompX has specialized, and the COGENT 4D, plasma edgeoriented FokkerPlanck code which has been constructed by Lawrence Livermore National Laboratory and Lawrence Berkeley Laboratory scientists, where coupled. Coupling was achieved by using CQL3D calculated velocity distributions including an energetic tail resulting from NBI, as boundary conditions for the COGENT code over the twodimensional velocity space on a spatial interface (flux) surface at a given radius near the plasma periphery. The finiteorbitwidth fast ions from the CQL3D distributions penetrated into the peripheral plasma modeled by the COGENT code. This combined code demonstrates the feasibility of the proposed 3D/4D code. By combining these codes, the greatest computational efficiency is achieved subject to present modelingmore »
 Authors:

 CompX
 Publication Date:
 Research Org.:
 CompX
 Sponsoring Org.:
 USDOE
 Contributing Org.:
 Lawrence Livermore National Laboratory/Fusion Theory and Computations Division
 OSTI Identifier:
 1108596
 Report Number(s):
 DOECompXSC0009491
 DOE Contract Number:
 SC0009491
 Resource Type:
 Technical Report
 Country of Publication:
 United States
 Language:
 English
 Subject:
 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Plasmas; FokkerPlanck equations; Computational Modeling
Citation Formats
Harvey, R. W., and Petrov, Yu. V. Final Technical Report for SBIR entitled FourDimensional FiniteOrbitWidth FokkerPlanck Code with Sources, for Neoclassical/Anomalous Transport Simulation of Ion and Electron Distributions. United States: N. p., 2013.
Web. doi:10.2172/1108596.
Harvey, R. W., & Petrov, Yu. V. Final Technical Report for SBIR entitled FourDimensional FiniteOrbitWidth FokkerPlanck Code with Sources, for Neoclassical/Anomalous Transport Simulation of Ion and Electron Distributions. United States. https://doi.org/10.2172/1108596
Harvey, R. W., and Petrov, Yu. V. 2013.
"Final Technical Report for SBIR entitled FourDimensional FiniteOrbitWidth FokkerPlanck Code with Sources, for Neoclassical/Anomalous Transport Simulation of Ion and Electron Distributions". United States. https://doi.org/10.2172/1108596. https://www.osti.gov/servlets/purl/1108596.
@article{osti_1108596,
title = {Final Technical Report for SBIR entitled FourDimensional FiniteOrbitWidth FokkerPlanck Code with Sources, for Neoclassical/Anomalous Transport Simulation of Ion and Electron Distributions},
author = {Harvey, R. W. and Petrov, Yu. V.},
abstractNote = {Within the US Department of Energy/Office of Fusion Energy magnetic fusion research program, there is an important wholeplasmamodeling need for a radiofrequency/neutralbeaminjection (RF/NBI) transportoriented finitedifference FokkerPlanck (FP) code with combined capabilities for 4D (2R2V) geometry near the fusion plasma periphery, and computationally less demanding 3D (1R2V) bounceaveraged capabilities for plasma in the core of fusion devices. Demonstration of proofofprinciple achievement of this goal has been carried out in research carried out under Phase I of the SBIR award. Two DOEsponsored codes, the CQL3D bounceaverage FokkerPlanck code in which CompX has specialized, and the COGENT 4D, plasma edgeoriented FokkerPlanck code which has been constructed by Lawrence Livermore National Laboratory and Lawrence Berkeley Laboratory scientists, where coupled. Coupling was achieved by using CQL3D calculated velocity distributions including an energetic tail resulting from NBI, as boundary conditions for the COGENT code over the twodimensional velocity space on a spatial interface (flux) surface at a given radius near the plasma periphery. The finiteorbitwidth fast ions from the CQL3D distributions penetrated into the peripheral plasma modeled by the COGENT code. This combined code demonstrates the feasibility of the proposed 3D/4D code. By combining these codes, the greatest computational efficiency is achieved subject to present modeling needs in toroidally symmetric magnetic fusion devices. The more efficient 3D code can be used in its regions of applicability, coupled to the more computationally demanding 4D code in higher collisionality edge plasma regions where that extended capability is necessary for accurate representation of the plasma. More efficient code leads to greater use and utility of the model. An ancillary aim of the project is to make the combined 3D/4D code user friendly. Achievement of fullcoupling of these two FokkerPlanck codes will advance computational modeling of plasma devices important to the USDOE magnetic fusion energy program, in particular the DIIID tokamak at General Atomics, San Diego, the NSTX spherical tokamak at Princeton, New Jersey, and the MST reversedfieldpinch Madison, Wisconsin. The validation studies of the code against the experiments will improve understanding of physics important for magnetic fusion, and will increase our design capabilities for achieving the goals of the International Tokamak Experimental Reactor (ITER) project in which the US is a participant and which seeks to demonstrate at least a factor of five in fusion power production divided by input power.},
doi = {10.2172/1108596},
url = {https://www.osti.gov/biblio/1108596},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2013},
month = {12}
}