Sandia’s Z machine is the world’s most powerful and efficient laboratory radiation source. It uses high magnetic fields associated with high electrical currents to produce high temperatures, high pressures, and powerful X-rays for research in high energy density physics. The Z machine creates conditions found nowhere else on Earth. Located in Albuquerque, NM, Z is part of Sandia’s Pulsed Power program, which began in the 1960s.
Z Research
Z researchers meet the toughest scientific challenges with innovation and ingenuity that breed groundbreaking results. Read Z’s publications and the sections below to learn more about this work.
Z provides the fastest, most accurate, and cheapest method to determine how materials will react under high pressures and temperatures, characteristics that can then be expressed in formulas called “equations of state.”
Fusion is the process by which two atomic nuclei are joined together. As an unconfined event, fusion has long been used in the development of weapons. Its great potential as a new source of energy, which depends on scientists’ ability to harness its power in laboratory events, continues to be explored. The Z machine is central to that effort.
The Z machine’s role in solving the world’s energy challenges is directly tied to its fusion potential. With growing concerns about the health of our planet and escalating energy needs, the development of fusion technology is especially promising.
Z is crucial to Sandia’s mission to ensure the reliability and safety of our nuclear stockpile as it ages – it allows scientists to study materials under conditions similar to those produced by the detonation of a nuclear weapon, and it produces key data used to validate physics models in computer simulations.
Image Gallery

The Sandia Z-Machine
The Z machine is located in Albuquerque, N.M., and is part of the Pulsed Power Program, which started at Sandia National Laboratories back in the 1960s. Pulsed power is a technology that concentrates electrical energy and turns it into short pulses of enormous power, which are then used to generate X-rays and gamma rays. Learn more at www.sandia.gov/z-machine/ . Photo by Randy Montoya.

Rings of Saturn
Saturn, one of Sandia's workhorse pulsed-power machines, delivers hard radiation during one of its milestone shots. The scarcity of jagged, lightning-like arcing between different water/metal interfaces means that the machine's water insulation is effective and that relatively much of its electrical pulse is traveling on its intended path from the machine's circular exterior to its central target. Learn more at bit.ly/31i8RBg . (Photo by Randy Montoya.)

Saturn Arc
Saturn, one of Sandia's pulsed-power machines, delivers hard radiation during one of its milestone shots. The scarcity of jagged, lightning-like arcing between different water/metal interfaces means that the machine's water insulation is effective and that relatively much of its electrical pulse is traveling on its intended path from the machine's circular exterior to its central target. Learn more at bit.ly/31i8RBg . (Photo by Randy Montoya.)

Hermes III
The linear Hermes pulsed power machine — the most powerful gamma ray producer in the world — is serviced for its next shot by technicians. Because of Sandia's nuclear responsibilities, Hermes and Saturn are kept in "warm standby mode" for immediate testing of components. (Photo by Randy Montoya.)

Understanding how stars transmit energy
Physicist Jim Bailey of Sandia National Laboratories observes a wire array that will heat foam to roughly 4 million degrees until it emits a burst of X-rays that heats a foil target to the interior conditions of the sun. Read more at bit.ly/2N1y1An Photo by Randy Montoya.

High Energy Radiation Megavolt Electron Source (HERMES) III pulsed power facility
The National Nuclear Security Administration (NNSA) awarded Sandia National Laboratories a Best in Class Sustainability Award for improvements in the labs’ Saturn and High Energy Radiation Megavolt Electron Source (HERMES) III pulsed power facilities. Read more at bit.ly/2YSQrFp . Photo by Randy Montoya. Understanding how stars transmit energy Understanding how stars transmit energy Physicist Jim Bailey of Sandia National Laboratories observes a wire array that will heat foam to roughly 4 million degrees until it emits a burst of X-rays that heats a foil target to the interior conditions of the sun. Read more at bit.ly/2N1y1An Photo by Randy Montoya. Fusion instabilities Fusion instabilities Sandia Labs physicist Thomas Awe examines coils that reduce plasma instabilities in the quest for controlled nuclear fusion at Sandia’s Z machine. Read more at bit.ly/2OJuSY3 . Photo by Randy Montoya.

Z array
A z-pinch wire array is prepared for shooting on Sandia National Laboratories' Z machine, the world's most powerful and efficient laboratory radiation source.

Z machine tests
Workmen at Sandia National Laboratories' Z machine test for any energy irregularities at the huge machine’s core prior to setting up for another experiment. Photo by Randy Montoya. Read more: bit.ly/33t2dtZ

Aligning Z machine diagnostics
Lasers are used to align diagnostics and hardware prior to shooting on Sandia's Z machine, the world's most powerful and efficient laboratory radiation source.

X-ray imaging on Z machine
Z machine scientist examines one of the aluminum cylinders used in the Z pulsed power experiments. The monitor on the X-ray machine in the background displays a highly magnified, pre-experiment view of the wavering edges machined into the outside edge of the cylinder. These were used to intentionally start the growth of the instability. Read more: bit.ly/2YVSbSv

Researcher loads hardware on Z machine
Shane Speas loads hardware for an upcoming shot on Sandia National Laboratories' Z machine, the world's most powerful and efficient laboratory radiation source.

Joint faculty appointment for Sandia physicist
Sandia National Laboratories physicist Marcus Knudson at Sandia’s Z machine has accepted a joint appointment with Washington State University. Learn more at bit.ly/31xfaky . Photo by Randy Montoya.

HERMES III
Technician Gary Tilley at Sandia Labs repairs a cavity at the High-Energy Radiation Megavolt Electron Source, or HERMES III. HERMES III recently successfully fired its 10,000th shot at Sandia Labs. Read more at bit.ly/2z2WxIM . Photo by Randy Montoya.

HERMES III
Pat Lake (left) and Ray Thomas examine the vacuum test fixture for the High-Energy Radiation Megavolt Electron Source, or HERMES III, insulator stack. HERMES III recently successfully fired its 10,000th shot at Sandia Labs. Read more at bit.ly/2z2WxIM . Photo by Randy Montoya.

More powerful fuel to boost Z Machine
Sandia National Laboratories principal investigator Dean Rovang checks out the Z Machine’s tritium gas transfer system, which was built at the labs’ Livermore, California, site and filled with trace tritium (0.1 percent) at Sandia in Albuquerque. Learn more at bit.ly/2nV1qxw . Photo by Randy Montoya.

Stress-induced fabrication
Sandia Labs technologist Joshua Usher loads a target into the main power flow section of Veloce, a Sandia pulsed-power generator. The machine uses pressure to fabricate nanoparticles into nanowire-array structures similar to those that underlie the surfaces of touch-screens for sensors, computers, phones and TVs. The pressure-based process takes nanoseconds. Chemistry-based industrial techniques take hours. Learn more at bit.ly/2pjlI76 . Photo by Randy Montoya.

Pulsed power accelerator
Sandia National Laboratories technologist Nicole Cofer inspects a target she fabricated for Sandia’s Thor pulsed-power accelerator, which has a revolutionary architecture optimized for megabar-class material physics experiments. The target is designed to hold materials that can be studied by pulsed power researchers under extreme conditions. Photo by Randy Montoya.

Keith Matzen earns nuclear fusion award
Sandia Fellow Keith Matzen stands at ease in the Z facility he helped create. Matzen received the 2019 Distinguished Career Award by Fusion Power Associates for his many contributions to the laboratory development of nuclear fusion. Learn more at bit.ly/2RXQ4rL Photo by Randy Montoya.

Record neutron numbers
Sandia researcher Matt Gomez stands under the Z-beamlet laser transport tube at Sandia’s Z pulsed power facility, the most powerful producer of X-rays on Earth. A relatively new method to control nuclear fusion that combines a massive jolt of electricity with strong magnetic fields and a powerful laser beam has achieved its own record output of neutrons — a key standard by which fusion efforts are judged. Learn more at bit.ly/35H814D Photo by Randy Montoya