logo for crossroads supercomputer (Los Alamos National Laboratory)

Los Alamos unwraps next-gen supercomputer

Los Alamos National Laboratory is getting a next-generation supercomputer to help scientists with the complex simulations required to manage the nation’s nuclear stockpile.

Crossroads will replace the existing Trinity supercomputer and will be used by scientists at Lawrence Livermore, Los Alamos and Sandia National Laboratories to support the Stockpile Stewardship Program.  It will also power calculations for current and planned weapons Life Extension Program activities and future predictive weapons research and calculations, Los Alamos officials said.

Crossroads uses 3D simulation tools to predict key physical phenomena and quantify and aggregate uncertainties. By 2021, Los Alamos officials said they expect to be able to run high-resolution 3D simulations with full physics and geometric features. The supercomputer will be the workhorse for the three labs between fiscal years 2022 and 2026.

It will be built by Hewlett Packard Enterprise under a $105 million contract from the National Nuclear Security Administration’s Alliance for Computing at Extreme Scale, a partnership between Los Alamos National Laboratory and Sandia National Laboratories.

Crossroads will feature the HPE Cray EX supercomputer, which includes the Cray Shasta architecture, liquid cooling capabilities, the HPE Slingshot interconnect and Intel’s future Xeon Sapphire Rapids processors that will enable much faster data movement. It will have four times better system performance than its predecessor Trinity system. 

“This machine will advance our ability to study the most complex physical systems for science and national security. We look forward to its arrival and deployment,” said Jason Pruet, program director for Los Alamos’ Advanced Simulating and Computing Program.

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