Fusion Plasma Simulation Software Couples Tokamak Core to Edge Physics

By Rob Farber

July 15, 2022

The development of a whole device model (WDM) for a fusion reactor is critical for the science of magnetically confined fusion plasmas. In the next decade, the ITER fusion reactor project will realize plasmas well beyond the physics regimes accessible in any previous experiments.[1] Computer simulation offers the ability to gain insight into these regimes as ITER is being built and tested, first with deuterium-deuterium fuel by 2025–2026 and then adapted to perform higher power deuterium-tritium experiments by 2035.[2] The US Department of Energy (DOE) has identified WDM as a high-priority need for “assessments of reactor performance in order to minimize risk and qualify operating scenarios for next-step burning plasma experiments.”[3] This need is reflected in the WDMApp documentation overview, which states, “The Whole Device Model Application (WDMApp) in the DOE Exascale Computing Project (ECP) is developing a high-fidelity model of magnetically confined fusion plasmas, urgently needed to plan experiments on ITER and optimize the design of next-step fusion facilities.”[4]

Technical Introduction

The creation of a WDM planning and optimization tool for controlled fusion in a tokamak fusion device is ambitious. The path chosen by the WDMApp team is to create a first-principles coupled kinetic code for the whole plasma (including core and boundary) and demonstrate an extensible software integration framework for plasma codes that can run well on exascale supercomputers. Challenge problems are chosen to ensure that the software is performant and accurately models the tokamak physics.

In addressing their first challenge problem to test their modeling capabilities, the team used their extendable framework, called EFFIS 2.0, to combine – in a physically accurate manner – simulated results from the XGC gyrokinetic code (used to simulate the edge region of a tokamak) with the GENE or GEM gyrokinetic code (used to simulate the core region). The team has successfully ported to GPU all three codes used in the simulation.

This resulted in the first core-edge coupled simulation of turbulence in the plasma of a tokamak device. The following illustration shows the complexity of the simulated turbulence, along with key parts of a tokamak.[5]

Figure 1. WDMApp core-edge coupled simulation shows seamless turbulence coupling.

Seamlessly merging the results of these core and edge simulation codes to accurately model the behavior of the plasma required, among other things, mathematically matching the turbulence in physical time and the spatially overlapping regions between the two codes and other essential activities. To address the performance-critical data transfer between the codes, the team used the ECP ADIOS framework.

The following images demonstrate the turbulence modeling capabilities of the separate GENE and XGC codes and the complexity of the simulated results. The animation illustrates how the core evolves more slowly than the edge.

Figure 2. Core turbulence from GENE is shown on the left. Edge turbulence from XGC is shown on the right.

A detailed discussion of the science and computational work performed to seamlessly merge these codes is presented in a paper entitled The Exascale Framework for High Fidelity coupled Simulations (EFFIS): Enabling whole device modeling in fusion science.

Scott Gibson, ECP Communications Specialist, hosts an informative high-level podcast, Let’s Talk Exascale Code Development: WDMApp — XGC, GENE, GEM, with subject-matter experts Tim Williams of Argonne National Laboratory (ANL), Aaron Scheinberg of Jubilee Development, Kai Germaschewski of the University of New Hampshire, and Bryce Allen of ANL and the University of Chicago.

To read the rest of Rob Farber’s Exascale Computing Project technical highlight, visit this link.

Subscribe to HPCwire's Weekly Update!

Be the most informed person in the room! Stay ahead of the tech trends with industy updates delivered to you every week!

Google Program to Free Chips Boosts University Semiconductor Design

August 11, 2022

A Google-led program to design and manufacture chips for free is becoming popular among researchers and computer enthusiasts. The search giant's open silicon program is providing the tools for anyone to design chips, which then get manufactured. Google foots the entire bill, from a chip's conception to delivery of the final product in a user's hand. Google's... Read more…

Argonne Deploys Polaris Supercomputer for Science in Advance of Aurora

August 9, 2022

Argonne National Laboratory has made its newest supercomputer, Polaris, available for scientific research. The system, which ranked 14th on the most recent Top500 list, is serving as a testbed for the exascale Aurora sys Read more…

US CHIPS and Science Act Signed Into Law

August 9, 2022

Just a few days after it was passed in the Senate, the U.S. CHIPS and Science Act has been signed into law by President Biden. In a ceremony today, Biden signed and lauded the ambitious piece of legislation, which over t Read more…

12 Midwestern Universities Team to Boost Semiconductor Supply Chain

August 8, 2022

The combined stressors of Covid-19 and the invasion of Ukraine have sent every major nation scrambling to reinforce its mission-critical supply chains – including and in particular the semiconductor supply chain. In the U.S. – which, like much of the world, relies on Asia for its semiconductors – those efforts have taken shape through the recently... Read more…

Quantum Pioneer D-Wave Rings NYSE Bell, Begins Life as Public Company

August 8, 2022

D-Wave Systems, one of the early quantum computing pioneers, has completed its SPAC deal to go public. Its merger with DPCM Capital was completed last Friday, and today, D-Wave management rang the bell on the New York Stock Exchange. It is now trading under two ticker symbols – QBTS and QBTS WS (warrant shares), respectively. Welcome to the public... Read more…

AWS Solution Channel

Shutterstock 1519171757

Running large-scale CFD fire simulations on AWS for Amazon.com

This post was contributed by Matt Broadfoot, Senior Fire Strategy Manager at Amazon Design and Construction, and Antonio Cennamo ProServe Customer Practice Manager, Colin Bridger Principal HPC GTM Specialist, Grigorios Pikoulas ProServe Strategic Program Leader, Neil Ashton Principal, Computational Engineering Product Strategy, Roberto Medar, ProServe HPC Consultant, Taiwo Abioye ProServe Security Consultant, Talib Mahouari ProServe Engagement Manager at AWS. Read more…

Microsoft/NVIDIA Solution Channel

Shutterstock 1689646429

Gain a Competitive Edge using Cloud-Based, GPU-Accelerated AI KYC Recommender Systems

Financial services organizations face increased competition for customers from technologies such as FinTechs, mobile banking applications, and online payment systems. To meet this challenge, it is important for organizations to have a deep understanding of their customers. Read more…

Supercomputer Models Explosives Critical for Nuclear Weapons

August 6, 2022

Lawrence Livermore National Laboratory (LLNL) is one of the laboratories that operates under the auspices of the National Nuclear Security Administration (NNSA), which manages the United States’ stockpile of nuclear we Read more…

Google Program to Free Chips Boosts University Semiconductor Design

August 11, 2022

A Google-led program to design and manufacture chips for free is becoming popular among researchers and computer enthusiasts. The search giant's open silicon program is providing the tools for anyone to design chips, which then get manufactured. Google foots the entire bill, from a chip's conception to delivery of the final product in a user's hand. Google's... Read more…

US CHIPS and Science Act Signed Into Law

August 9, 2022

Just a few days after it was passed in the Senate, the U.S. CHIPS and Science Act has been signed into law by President Biden. In a ceremony today, Biden signed Read more…

Quantum Pioneer D-Wave Rings NYSE Bell, Begins Life as Public Company

August 8, 2022

D-Wave Systems, one of the early quantum computing pioneers, has completed its SPAC deal to go public. Its merger with DPCM Capital was completed last Friday, and today, D-Wave management rang the bell on the New York Stock Exchange. It is now trading under two ticker symbols – QBTS and QBTS WS (warrant shares), respectively. Welcome to the public... Read more…

SEA Changes: How EuroHPC Is Preparing for Exascale

August 5, 2022

Back in June, the EuroHPC Joint Undertaking — which serves as the EU’s concerted supercomputing play — announced its first exascale system: JUPITER, set to be installed by the Jülich Supercomputing Centre (FZJ) in 2023. But EuroHPC has been preparing for the exascale era for a much longer time: eight months before... Read more…

Not Just Cash for Chips – The New Chips and Science Act Boosts NSF, DOE, NIST

August 3, 2022

After two-plus years of contentious debate, several different names, and final passage by the House (243-187) and Senate (64-33) last week, the Chips and Science Act will soon become law. Besides the $54.2 billion provided to boost US-based chip manufacturing, the act reshapes US science policy in meaningful ways. NSF’s proposed budget... Read more…

CXL Brings Datacenter-sized Computing with 3.0 Standard, Thinks Ahead to 4.0

August 2, 2022

A new version of a standard backed by major cloud providers and chip companies could change the way some of the world's largest datacenters and fastest supercomputers are built. The CXL Consortium on Tuesday announced a new specification called CXL 3.0 – also known as Compute Express Link 3.0... Read more…

Inside an Ambitious Play to Shake Up HPC and the Texas Grid

August 2, 2022

With HPC demand ballooning and Moore’s law slowing down, modern supercomputers often undergo exhaustive efficiency efforts aimed at ameliorating exorbitant energy bills and correspondingly large carbon footprints. Others, meanwhile, are asking: is min-maxing the best option, or are there easier paths to reducing the bills and emissions of... Read more…

UCIe Consortium Incorporates, Nvidia and Alibaba Round Out Board

August 2, 2022

The Universal Chiplet Interconnect Express (UCIe) consortium is moving ahead with its effort to standardize a universal interconnect at the package level. The c Read more…

Nvidia R&D Chief on How AI is Improving Chip Design

April 18, 2022

Getting a glimpse into Nvidia’s R&D has become a regular feature of the spring GTC conference with Bill Dally, chief scientist and senior vice president of research, providing an overview of Nvidia’s R&D organization and a few details on current priorities. This year, Dally focused mostly on AI tools that Nvidia is both developing and using in-house to improve... Read more…

Royalty-free stock illustration ID: 1919750255

Intel Says UCIe to Outpace PCIe in Speed Race

May 11, 2022

Intel has shared more details on a new interconnect that is the foundation of the company’s long-term plan for x86, Arm and RISC-V architectures to co-exist in a single chip package. The semiconductor company is taking a modular approach to chip design with the option for customers to cram computing blocks such as CPUs, GPUs and AI accelerators inside a single chip package. Read more…

The Final Frontier: US Has Its First Exascale Supercomputer

May 30, 2022

In April 2018, the U.S. Department of Energy announced plans to procure a trio of exascale supercomputers at a total cost of up to $1.8 billion dollars. Over the ensuing four years, many announcements were made, many deadlines were missed, and a pandemic threw the world into disarray. Now, at long last, HPE and Oak Ridge National Laboratory (ORNL) have announced that the first of those... Read more…

US Senate Passes CHIPS Act Temperature Check, but Challenges Linger

July 19, 2022

The U.S. Senate on Tuesday passed a major hurdle that will open up close to $52 billion in grants for the semiconductor industry to boost manufacturing, supply chain and research and development. U.S. senators voted 64-34 in favor of advancing the CHIPS Act, which sets the stage for the final consideration... Read more…

Top500: Exascale Is Officially Here with Debut of Frontier

May 30, 2022

The 59th installment of the Top500 list, issued today from ISC 2022 in Hamburg, Germany, officially marks a new era in supercomputing with the debut of the first-ever exascale system on the list. Frontier, deployed at the Department of Energy’s Oak Ridge National Laboratory, achieved 1.102 exaflops in its fastest High Performance Linpack run, which was completed... Read more…

Newly-Observed Higgs Mode Holds Promise in Quantum Computing

June 8, 2022

The first-ever appearance of a previously undetectable quantum excitation known as the axial Higgs mode – exciting in its own right – also holds promise for developing and manipulating higher temperature quantum materials... Read more…

AMD’s MI300 APUs to Power Exascale El Capitan Supercomputer

June 21, 2022

Additional details of the architecture of the exascale El Capitan supercomputer were disclosed today by Lawrence Livermore National Laboratory’s (LLNL) Terri Read more…

PsiQuantum’s Path to 1 Million Qubits

April 21, 2022

PsiQuantum, founded in 2016 by four researchers with roots at Bristol University, Stanford University, and York University, is one of a few quantum computing startups that’s kept a moderately low PR profile. (That’s if you disregard the roughly $700 million in funding it has attracted.) The main reason is PsiQuantum has eschewed the clamorous public chase for... Read more…

Leading Solution Providers

Contributors

ISC 2022 Booth Video Tours

AMD
AWS
DDN
Dell
Intel
Lenovo
Microsoft
PENGUIN SOLUTIONS

Exclusive Inside Look at First US Exascale Supercomputer

July 1, 2022

HPCwire takes you inside the Frontier datacenter at DOE's Oak Ridge National Laboratory (ORNL) in Oak Ridge, Tenn., for an interview with Frontier Project Direc Read more…

AMD Opens Up Chip Design to the Outside for Custom Future

June 15, 2022

AMD is getting personal with chips as it sets sail to make products more to the liking of its customers. The chipmaker detailed a modular chip future in which customers can mix and match non-AMD processors in a custom chip package. "We are focused on making it easier to implement chips with more flexibility," said Mark Papermaster, chief technology officer at AMD during the analyst day meeting late last week. Read more…

Intel Reiterates Plans to Merge CPU, GPU High-performance Chip Roadmaps

May 31, 2022

Intel reiterated it is well on its way to merging its roadmap of high-performance CPUs and GPUs as it shifts over to newer manufacturing processes and packaging technologies in the coming years. The company is merging the CPU and GPU lineups into a chip (codenamed Falcon Shores) which Intel has dubbed an XPU. Falcon Shores... Read more…

Nvidia, Intel to Power Atos-Built MareNostrum 5 Supercomputer

June 16, 2022

The long-troubled, hotly anticipated MareNostrum 5 supercomputer finally has a vendor: Atos, which will be supplying a system that includes both Nvidia and Inte Read more…

India Launches Petascale ‘PARAM Ganga’ Supercomputer

March 8, 2022

Just a couple of weeks ago, the Indian government promised that it had five HPC systems in the final stages of installation and would launch nine new supercomputers this year. Now, it appears to be making good on that promise: the country’s National Supercomputing Mission (NSM) has announced the deployment of “PARAM Ganga” petascale supercomputer at Indian Institute of Technology (IIT)... Read more…

Is Time Running Out for Compromise on America COMPETES/USICA Act?

June 22, 2022

You may recall that efforts proposed in 2020 to remake the National Science Foundation (Endless Frontier Act) have since expanded and morphed into two gigantic bills, the America COMPETES Act in the U.S. House of Representatives and the U.S. Innovation and Competition Act in the U.S. Senate. So far, efforts to reconcile the two pieces of legislation have snagged and recent reports... Read more…

AMD Lines Up Alternate Chips as It Eyes a ‘Post-exaflops’ Future

June 10, 2022

Close to a decade ago, AMD was in turmoil. The company was playing second fiddle to Intel in PCs and datacenters, and its road to profitability hinged mostly on Read more…

Exascale Watch: Aurora Installation Underway, Now Open for Reservations

May 10, 2022

Installation has begun on the Aurora supercomputer, Rick Stevens (associate director of Argonne National Laboratory) revealed today during the Intel Vision event keynote taking place in Dallas, Texas, and online. Joining Intel exec Raja Koduri on stage, Stevens confirmed that the Aurora build is underway – a major development for a system that is projected to deliver more... Read more…

  • arrow
  • Click Here for More Headlines
  • arrow
HPCwire