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Space Weather, Magnetosphere & Ionosphere
 | FULLFGK -Full of gyrokinetic simulation of plasma edgeUnderstanding the plasma turbulence is of major importance for success of ITER being important step in the development of fusion energy. In the present proposal, the global 5D full f gyrokinetic particle code ELMFIRE simulating both turbulence and neoclassical physics is to be used to simulate ASDEX Upgrade or some other medium-sized tokamak. Using full-f technique, simulation of transport phenomena involving wide orbit effects, steep gradients, and rapid dynamic changes in profiles becomes possible to model, but same time requirement of CPU resources increases in order to reduce noise to acceptable level. Massively parallelized simulations order of 2-4 weeks with 500 processors would probably be long enough to see possible L-H transition as the plasma is heated up. |
| | GYDRO3D - Global gyrokinetic simulations for stellaratorsSimulations of plasma microinstabilities and related turbulence for a full torus three-dimensional stellarator configuration are a necessary complement to ex-periments as e.g. Wendelstein 7-X. Gyrokinetics as a first principle based theory is well suited for this task. An established and flexible method for solving the gyrokinetic system of equations is the simulation via the particle-in-cell (PIC) Monte-Carlo method. This has been implemented in the code EUTERPE which solves the linearized electrostatic gyrokinetic equation for the ions (electrons are assumed to be adiabatic) globally in stellarator geometry. In order to reduce the noise connected with the particle discretization state-of-the-art noise reduction techniques (δf-method, optimized loading) are employed. The use of B-Spline finite elements unifies charge assignment and the solution of the Helmholtz equation. The additional computational power made accessible by DECI will be used to run for the first time gyrokinetic nonlinear plasma turbulence simula-tions globally in full three-dimensional geometry of a plasma device. |
 | SPIDR - Space Physics Interactive Data ResourceSPIDR (Space Physics Interactive Data Resource) is a de facto standard data source for solar-terrestrial physics, functioning within the framework of the ICSU World Data Centers. It is a distributed database and application server network, built to select, visualize and model historical space weather data distributed across the Internet. SPIDR can work as a fully-functional web-application (portal) or as a grid of web-services, providing functions for other applications to access its data holdings. |
DEGREE news Letter #5