Trinity (supercomputer)

Trinity (supercomputer). It is a Cray XC40 supercomputer operated by Los Alamos National Laboratory and Sandia National Laboratories for the National Nuclear Security Administration's Advanced Simulation and Computing Program. The system was designed to provide crucial computational capability for the United States Department of Energy's Stockpile stewardship program, ensuring the safety and reliability of the nation's nuclear arsenal without underground testing. Its deployment marked a significant advancement in the predictive simulation capabilities available to the United States' national security laboratories.

Overview

The Trinity (supercomputer) is a pivotal resource within the Advanced Simulation and Computing Program, a cornerstone of the broader Stockpile stewardship initiative managed by the National Nuclear Security Administration. Residing at the Los Alamos National Laboratory in New Mexico, it represents a collaboration between that facility and Sandia National Laboratories. This supercomputer was procured to address the increasingly complex simulation requirements for analyzing the aging of nuclear weapons components, a task mandated following the cessation of underground nuclear tests. Its computational power enables researchers to run highly detailed, multi-physics simulations that inform assessments of the enduring stockpile.

Hardware and architecture

Trinity is based on the Cray XC40 platform, a massively parallel processing architecture designed by Cray Inc. The system initially featured a hybrid configuration utilizing both Intel Xeon Haswell processors and Intel Xeon Phi Knights Landing many-integrated-core coprocessors. This heterogeneous design allowed for flexibility in handling different types of computational workloads. The machine is interconnected by Cray's proprietary Aries high-performance network, which employs a Dragonfly topology to minimize latency and maximize data throughput across its thousands of nodes. The entire system is cooled using a warm-water, liquid-based system for efficiency and is supported by a large-scale Lustre parallel file system for data storage.

Purpose and applications

The primary mission of Trinity is to execute advanced simulations for the Stockpile stewardship program under the auspices of the National Nuclear Security Administration. Its applications are focused on predictive science, running complex codes that model the physics of nuclear weapons, including thermonuclear secondary stages, primary plutonium pits, and associated non-nuclear components. These simulations help assess the effects of material aging and predict performance, thereby ensuring the reliability of the United States nuclear weapons stockpile. The system also supports broader national security research, including work in computational fluid dynamics, materials science, and climate modeling for effects on infrastructure.

History and development

The contract for Trinity was awarded to Cray Inc. in 2014, with a total cost of approximately $174 million. The system was installed at the Los Alamos National Laboratory in phases, with an initial capability platform becoming operational in 2015. A major upgrade in 2017 replaced portions of the system with next-generation Intel Xeon Phi processors, significantly boosting its performance. The development and deployment were managed collaboratively by Los Alamos National Laboratory and Sandia National Laboratories, with oversight from the National Nuclear Security Administration and funding from the United States Department of Energy. Its name continues a tradition at Los Alamos of naming supercomputers after pivotal moments in nuclear history, following systems like Roadrunner and Cielo.

Performance and rankings

At its deployment, Trinity achieved a peak performance of 20.2 PetaFLOPS, or 20.2 quadrillion calculations per second. In the November 2015 release of the TOP500 list of the world's most powerful supercomputers, it debuted in 7th place globally. This ranking highlighted its status as one of the most capable systems dedicated to government science. While it has since been surpassed by newer systems like Summit, Fugaku, and Frontier in the TOP500, Trinity remains a critical and heavily utilized production system for the National Nuclear Security Administration's classified and unclassified workload, consistently delivering high application performance for its core national security missions.

Category:Supercomputers Category:Los Alamos National Laboratory Category:Cray computers Category:National Nuclear Security Administration