Theory Weekly Highlights for February 2019

February 22, 2019

The GA Theory Group hosted the first NIMROD-CQL3D Coding Camp February 20 and 21. The two-day code camp provided overviews of the NIMROD (extended MHD initial value) and CQL3D (bounce average Fokker-Planck) codes, presented initial simulations of disruption mitigation and runaway electrons, and worked out strategies for coupling the two codes. In attendance were: Lang Lao, Bob Harvey, Paul Parks, Yuri Petrov, Yueqiang Liu, Charlson Kim, Valerie Izzo, and Joseph McClenaghan, with a special appearance by Carlos Paz-Soldan. The meeting concluded with initial plans for data exchange and integration and testing and validation with experiments. The NIMROD CQL3D Coding Camp is supported through the SCREAM-SciDAC collaboration.

February 08, 2019

A combined AToM & PSI SciDAC project meeting was hosted at General Atomics this week. The goal of the AToM [1] project is to support, integrate, and build upon a wide spectrum of existing research activities in the US fusion program, and guide the integration of high performance computing resources to enable advanced integrated simulations, coupling core, pedestal and scrape-off-layer physics in order to predict, and further optimize, performance of the fusion plasma. The PSI2 project (see is developing and integrating high-performance simulation tools capable of predicting plasma facing component (PFC) operating lifetime and the impact of the evolving surface morphology and composition of tungsten-based PFCs on plasma contamination, including the dynamic recycling of fuel species and tritium retention, in future magnetic fusion devices. Over 50 participants from 17 institutions attended the meeting, with presentations, tutorials, and discussions in a mixed format. Combined sessions between the two SciDAC projects aimed at developing plans for coordinated research, including integrated simulations extending from the core plasma all the way to the material surface.

February 01, 2019

Dr. Xavier Bonnin, the SOLPS-ITER code Responsible Officer at the ITER Organization was hosted by the AToM SciDAC project and the DIII-D Boundary Center for a week long SOLPS-ITER workshop that took place at GA. Twenty participants from multiple international institutions attended the workshop, which was specifically geared toward veteran users of the code and experimentalists involved in model validation. Physics discussions gravitated around the analysis of the DIII-D SAS divertor and the design of its upgrade. Technical topics covered conversion of models from older versions of SOLPS to SOLPS-ITER, enabling drifts in the B2 fluid calculations, neutral-neutral collisions in the EIRENE Monte Carlo code, and meshing. The later part of the workshop featured presentations related to the SOLPS module within OMFIT, access to SOLPS-ITER data stored in IMAS via OMAS, and automatic grid generation with GINGRED.

These highlights are reports of research work in progress and are accordingly subject to change or modification