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Franklin, NERSC's Cray XT4, is among the largest machines on the list of Top 500 supercomputers in the world.

NERSC
is the flagship high performance scientific computing facility for research sponsored by the U.S. Department of Energy Office of Science. NERSC, a national facility located at Lawrence Berkeley National Laboratory, is a world leader in providing resources and services that accelerate scientific discovery through computation.

Now Computing

A small sample of massively parallel scientific computing jobs running right now at NERSC.

Project	Machine	CPU Cores
Computation of Electronic Properties of Materials from First Principles	Franklin	4,224
continuing studies of plasma based accelerators	Franklin	4,096
Lattice Boltzmann Simulations for Plasmas	Franklin	4,096
Lattice Boltzmann Simulations for Plasmas	Franklin	4,096
Computational Materials Theory	Hopper	672
Toward Petascale Atomistic Simulations with Quantum-Level Accuracy: Alloys and Dynamic Fracture	Hopper	512
Lattice Gauge Theory Simulations	Bassi	96

Computational Nanoscience for Energy Conversion

Contour plots from Density Functional Theory calculations showing electronic density of states in a model highly mismatched alloy created by adding varying amounts of oxygen (3.125% in (a) and 6.25% in (b)) to a zinc (light blue) selenide (orange) compound. Oxygen atoms are surrounded by the dark-blue high density region.

Computations performed on Franklin have showed that introduction of oxygen impurities into a unique class of semiconductors known as "highly mismatched alloys" (HMAs) can substantially enhance the thermoelectric performance of these materials without the customary degradation in electric conductivity.

Thermoelectric materials involve direct conversion of temperature differences into electric voltage. In a paper published recently in Physical Review Letters, the researchers suggest that their results could allow a variety of abundant materials and new physics for scalable, widely tunable, high-thermopower thermoelectrics.

[ MORE...]

News Center

Cray XT5 Hopper (Phase 1) Prepares NERSC for Petascale Computing

After several months of rigorous scientific testing, NERSC has accepted a 5,312-core Cray XT5 machine, called Hopper (Phase 1). [MORE]

Hopper in Production March 1

Hopper account charging has begun (charge factor=1, same as Franklin) and disk quotas will be enforced. Default $SCRATCH quota will be 2TB. File purging will start on June 1st. [MORE]

First Round of 2010 NISE Awards

About 29M hours of computing time is available to existing or new NERSC projects during AY2010. Eleven projects have been selected to receive ~12M hours. Approximately 17M hours remain available. [MORE]

Science News

CMB Analysis: A NERSC Tradition

NERSC is aiding in the long and complicated process of understanding data from the Planck spacecraft that is attempting to illuminate the nature and origin of dark matter in the universe. Scientists are creating high-resolution maps of extremely subtle variations in the Cosmic Microwave Background (CMB), which is light leftover from the Big Bang that permeates the universe. The work relies on NERSC's well-balanced high performance computing systems that provide sufficient I/O capability for CMB analyses that require entire datasets.
[MORE]

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