ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Explore membership for yourself or for your organization.
Conference Spotlight
2026 ANS Annual Conference
May 31–June 3, 2026
Denver, CO|Sheraton Denver
Latest Magazine Issues
Jan 2026
Jul 2025
Latest Journal Issues
Nuclear Science and Engineering
February 2026
Nuclear Technology
January 2026
Fusion Science and Technology
Latest News
The spark of the Super: Teller–Ulam and the birth of the H-bomb—rivalry, credit, and legacy at 75 years
In early 1951, Los Alamos scientists Edward Teller and Stanislaw Ulam devised a breakthrough that would lead to the hydrogen bomb [1]. Their design gave the United States an initial advantage in the Cold War, though comparable progress was soon achieved independently in the Soviet Union and the United Kingdom.
Matthew Thompson, Vidya Nalajala, Brian Kelleher, Steven Brantley, Clemente Parga, Alex Cheung, Matt Aubuchon, Brian Nelson, Micki Acks, Skyler Ashrun, Steven Bagdy, Allan Basile, Brianne Beers, Clyde Joshua Beers, Kenneth Blackwell, Haley Blanck, Felipe Caliari, Hannah Carlson, Michael Christenson, Thomas Connolly, Steven Cortez, Justin Costa-Greger, Christopher Dion, Sean Gagnon, Harpreet Grover, Corwin Hansen, Kaleb Hatfield, Santtu Joni Eemeli Huotilainen, Steve Jurovich, Scott Korlann, Brad Maynard, Santhosh Kumar Muniyal Krishna, Marcus Parry, Wyatt Pauley, Bill Pedler, Tyler Rhodes, David Sanabria Diaz, Whitney Schoenthal, Tim Schwartz, Geoff Staines, James Stuber, Zofia Toth, Nathan Tripp, Bruce Wakefield, Ben Watson, Chen Ying, Cassidy Zehner
Fusion Science and Technology | Volume 82 | Number 1 | January-February 2026 | Pages 32-44
Research Article | doi.org/10.1080/15361055.2025.2532331
Articles are hosted by Taylor and Francis Online.
Zap Energy is developing the sheared-flow-stabilized (SFS) Z-pinch concept for commercial applications. The SFS Z-pinch relies on plasma self-organization, in the sense that plasma dynamics play a critical role in confinement. Using plasma axial current for confinement and compression eliminates the need for external confinement or heating technologies. This compact magnetic confinement technology could, in turn, provide the basis for a cost-effective deuterium-tritium fusion power plant. In addition to a robust experimental program pushing plasma performance toward breakeven conditions, Zap Energy has parallel programs developing power handling systems suitable for future power plants. Technologies under development include high average power repetitive pulsed power, high duty cycle cathodes, and liquid metal wall systems. Century is the name of Zap Energy’s first effort to integrate these three components into an operational system capable of firing nonreacting hydrogen SFS Z-pinch plasmas into a liquid metal–lined container at sustained repetition rates on the order of 0.1 Hz. The pulsed power driver and liquid metal heat exchanger are both designed to sustain input powers of 100 kW. Construction and initial operations with an interim ~10-kW liquid metal heat exchanger are described.