ASCR Highlights

You are here

October 29, 2019
Dataflow in the design-to-device study for a panchromatic photovoltaic cell.
Investigating Dyes for Solar Cells from Start to Finish
Finding the right dyes for a new type of solar cell can be challenging, but this study used supercomputers to speed up the process.
September 18, 2019
In metallic glasses, atoms are arranged randomly, leading to unique properties. These glasses are brittle. A map of calculated “strength” in the structure shows “hard” and “soft” spots. The team predicts the soft spots are the sites that initiate failure.
Even Hard Materials Have Soft Spots
Scientists find the weak points to facilitate industrial applications of metallic glasses.
August 23, 2019
A faceted metal island of the rare-earth element dysprosium formed under a layer of graphite. The team deposited the metal at 577 degrees Celsius after they bombarded graphite with argon ions.
Getting Metal Under Graphite’s Skin
A new route to make metal beneath a layer of graphite opens potentially new applications in solar cells and quantum computing.
August 23, 2019
Researchers used the Blanco telescope in conducting the Dark Energy Survey. The Milky Way is on the left of the sky, with the Magellanic clouds in the center.
Survey Delivers on Dark Energy with Multiple Probes
The Dark Energy Survey has delivered dark energy constraints combining information from four of its primary cosmological probes for the first time.
August 16, 2019
A representation of the shift of atoms after the electrons are excited by an ultrafast pulse of light. Before and after positions are superimposed, showing transitions. Scattering data taken at a tenth (top) and one picosecond (bottom).
Excited Atoms Rush Independently to New Positions
Ultrafast X-rays track how associated pairs of atoms find new locations when triggered by light.
August 15, 2019
Researchers ran their seismic sensor experiments on a 20-mile segment of the 13,000-mile-long ESnet Dark Fiber Testbed. The red section is the area of focus for ambient noise analysis; the blue section is collinear with an active rail line.
Science Network Turns Seismic Sensor
Dark fiber lays groundwork for long-distance earthquake detection and groundwater mapping.
August 6, 2019
Time series of a machine-learning–based coarse-grained simulation, ML-BOPdih, provides snapshots spanning ~1 microsecond (t=time) showing evolution of grain boundaries (green) between regions of hexagonal (blue) and cubic (orange) ice.
Machine Learning Helps Create Detailed, Efficient Models of Water
Models use a fraction of the computational cost of today’s best atom-based water models.
June 24, 2019
Example simulation of dark matter in the universe used as input to the CosmoFlow network.
Deep Learning Reveals Mysteries of Deep Space
Supercomputer use offers insights into how to best describe the nature of our universe.
June 14, 2019
Simulations of different geometric states of fluid (red) in rock (tan). Using the Titan supercomputer at Oak Ridge National Laboratory, researchers validated a geometric model for characterizing fluid flow in porous rock and geologic material from theory.
New Geometric Model Improves Predictions of Fluid Flow in Rock
Supercomputer validates mathematical approach for describing geological features.
June 12, 2019
Temperature distribution in wire-wrapped pin bundle shows hot spots near the wire-wrap contact with the solid pin.
High-Fidelity Multiphysics Simulations to Improve Nuclear Reactor Safety and Economics
Engineers can model heat distribution in reactor designs with fewer or no approximations.
June 11, 2019
The image illustrates this process and shows how two neutrons (shown as blue spheres in the background) beta decay into a neutron and a proton (shown as a red sphere) under the emission of an electron and a neutrino (small green and blue sphere).
Solving a Beta Decay Puzzle
Researchers use advanced nuclear models to explain 50-year mystery surrounding the process stars use to transform elements.
June 6, 2019
In the North-Central Atlantic Ocean near the center of the simulation snapshot, a hurricane is visible as a dot of gray and from the cold water (green) it stirred up in the otherwise warm (red) Central Atlantic Ocean.
Watching the Rain in Climate Models
Scientists use supercomputers to determine how reliably a popular Earth system model represents precipitation regionally and globally.
June 6, 2019
To determine key behaviors in a self-healing material—a composite of cement and a polymer—for underground wells, researchers built a simulation that explained molecular-level interactions.
Simulations Shed Light on Self-Healing Cement
A first-of-its-kind computer simulation reveals self-healing cement for geothermal and oil and gas wells performs better than originally thought.
June 5, 2019
The number density of electrons and positrons in a 3D relativistic plasma turbulence simulation. The energy cascade causes structures to form over a broad range of scales, spanning from microphysical scales (on the particle gyration scale) to the box size
Computer Simulation Shows Astrophysical Particle Acceleration
Particles act in a way that justifies extrapolating simulation results to astrophysical scales.
June 1, 2019
This side view of the STAR detector at the Relativistic Heavy Ion Collider (RHIC) shows the endcap electromagnetic calorimeter.
STAR Gains Access to “Wimpy” Quarks and Gluons
Low-momentum (wimpy) quarks and gluons contribute to proton spin, offering insights into protons’ behavior in all visible matter.
May 30, 2019
Titan supercomputer tells origin story of nanoparticle size distributions with large-scale simulations.
Laser Focus Shines Light on How Nanoparticles Form
Titan supercomputer tells origin story of nanoparticle size distributions with large-scale simulations.
May 30, 2019
An artistic rendition of the synergistic catalyst showing core-shell active sites (blue) in platinum-cobalt nanoparticles (spheres) on a platinum group metal-free catalytic support.
Improved Fuel Cell Catalysts with Less Platinum
A new catalyst design meets cost, activity, and durability goals by leveraging ultralow loadings of platinum with platinum-free supports.
April 22, 2019
Princeton’s Fusion Recurrent Neural Network code uses convolutional & recurrent neural network components to integrate spatial & temporal information for predicting disruptions in tokamak (central structure) plasmas with unprecedented accuracy and speed.
Artificial Intelligence and Deep Learning Accelerate Efforts to Develop Clean, Virtually Limitless Fusion Energy
The Fusion Recurrent Neural Network reliably forecasts disruptive and destructive events in tokamaks.
April 18, 2019
The latest data from the Relativistic Heavy Ion Collider reveal that the quark spin contribution (green puzzle piece)—specifically the contribution from a “sea” of antiquarks—is more complex than previously thought.
Sea Quark Spin Surprise!
Since the 1980s, scientists have known that quark and antiquark spins within a proton account for, at best, a quarter of the overall proton spin.
April 15, 2019
For batteries to generate electricity, charged atoms, called ions (pink and green), travel between a negative node (anode) and a positive node (cathode) with the help of a liquid electrolyte solution.
Team Takes Fluoride from Taps and Toothpaste to Batteries
With user facilities, researchers devise novel battery chemistries to help make fluoride batteries a reality.
February 27, 2019
This map is an example from the global gridded data set that shows the spatial distribution of annual mean water withdrawal in six sectors.
How Much Water Does the World Use?
Global data set shows monthly water use by irrigation, manufacturing, and other uses, helping researchers to analyze water use by region and season.
February 26, 2019
The scientists used radiometers, shown here, to isolate the signal of methane’s greenhouse effect. Radiometers are among the many instruments at ARM’s Southern Great Plains observatory the team used as part of this study.
First Observation of Methane’s Increasing Greenhouse Effect at the Earth’s Surface
Predictions of the direct impacts of greenhouse gases must account for local temperature and humidity conditions.
February 25, 2019
In areas with weak surface winds, additional evaporation from the ocean’s surface is a major energy source for driving tropical patterns that create rainfall.
Gust or Bust: Blustery Winds Important for Modeling Tropical Rainfall
Researchers find gusty winds increase surface evaporation that drives summer rainstorms in the Tropical West Pacific.
February 17, 2019
Contour plot of a cross-section plane around the magnetic islands (depicted by dashed lines), showing the variation of the electrostatic potential associated with the magnetic island.
New Model Sheds Light on Key Physics of Magnetic Islands that Can Halt Fusion Reactions
Surprisingly, a magnetic island does not necessarily perturb the plasma current in a dangerous way and destroy fusion performance.
February 12, 2019
Adjacent computer-assisted design models of the Pinnacle Engines opposed-piston gasoline engine.
Pinnacle Engines Develops Efficient, Low-Emission Gasoline Engine Using Supercomputing
Researchers modeled design concepts for innovative, opposed-piston engine on Titan supercomputer.