NIF Sustainment

How do you maintain a facility built to achieve the impossible? In this episode, we explore the National Ignition Facility Sustainment Project—a mission to preserve and enhance one of the most advanced laser systems ever created. Discover how scientists at the National Ignition Facility keep this technological marvel running, overcoming challenges of aging systems to ensure it remains a cornerstone of innovation and a vital asset to the nation’s security.

• 0:00Speaker 00

  Lawrence Livermore National Laboratory is hiring. If you're passionate about tackling real-world challenges in science, engineering, business, or skilled trades, there's a place for you at the lab. Right now, positions are open for a Senior Guidance, Navigation, and Controls Engineer and a Senior Business Operations Specialist. These are just a few of the more than 100 exciting roles available. At Lawrence Livermore, you'll work on projects that matter, from national security to cutting-edge scientific advancements. Join a team that values innovation, collaboration, and professional growth.

• 0:40Speaker 00

  Explore opportunities at llnl.gov/careers, where your next career move could make history. It's June 1999. A giant crane towers over a construction site at Lawrence Livermore National Laboratory. This isn't just any crane. It's a 14-story, 900-ton machine. Once used to lower nuclear weapons for underground testing at the Nevada Test Site, it now has a new purpose: helping to construct an experimental facility that ensures the nation's nuclear arsenal remains safe and secure.

• 1:24Speaker 00

  No testing required. Slowly, the crane begins to lower its monumental payload: a 10-meter diameter, 143-ton target chamber. Waiting below is the shell of a building and a team of engineers and technicians, their eyes fixed on the massive sphere as it descends. Every millimeter of the chamber's placement is critical. Nothing could be out of alignment. When the target chamber finally settled into place, it marked one of the most significant milestones in the construction of the National Ignition Facility, or NIF.

• 2:06Speaker 00

  This chamber would become the heart of NIF, an experimental facility unlike anything ever created before. Once operational, NIF would be able to replicate temperatures and pressures found only in the core of stars or during the detonation of nuclear weapons. Conditions critical to advancing science and ensuring the safety and reliability of the nation's nuclear stockpile. But this milestone in 1999 was just one chapter in a much longer story. Year by year, the pieces of NIF came together. In 2000, the facility's main building was completed.

• 2:48Speaker 00

  By 2003, the laser bay architecture began to take shape. In 2008, the last of the 192 laser beam lines were installed. And in 2009, NIF fired its first large-scale experiments.

• 3:06Speaker 00

  At NIF, every experiment is a masterpiece of precision. The facility is the size of three football fields. And inside, 192 lasers travel a mile through massive beam lines to converge on a holorum containing a 2-millimeter fuel capsule. Their alignment must be flawless, with beams arriving within less than half the width of a human hair of each other. Since 2009, this extraordinary feat of engineering has been repeated more than 5,000 times. And along the way, NIF achieved something once thought impossible.

• 3:41Speaker 01

  Scientists inside the Lawrence Livermore National Laboratory may have achieved something extraordinary, something they've spent decades trying to do.

• 3:50Speaker 00

  Fusion ignition.

• 3:51Speaker 01

  Researchers here at the Lawrence Livermore National Laboratory fired 192 lasers at a small, frozen pellet of hydrogen.

• 3:58Speaker 00

  Generating more energy from the fusion reaction than the energy delivered by the laser.

• 4:03Speaker 01

  This development is one step closer to a clean energy future.

• 4:07Speaker 00

  But time takes its toll, even on the most finely tuned instruments. At NIF, the challenge isn't reinvention. It's preservation. And the story of how it's done is as extraordinary as the experiments themselves.

• 4:26Speaker 00

  Welcome to the Big Ideas Lab, your weekly exploration inside Lawrence Livermore National Laboratory. Hear untold stories, meet boundary pushing pioneers, and get unparalleled access inside the gates. From national security challenges to computing revolutions, discover the innovations that are shaping tomorrow today.

• 4:54Speaker 00

  Lawrence Livermore National Laboratory is hiring. If you're passionate about tackling real world challenges in science, engineering, business, or skilled trades, there's a place for you at the lab. Right now, positions are open for a Senior Guidance, Navigation and Controls Engineer and a Senior Business Operations Specialist. These are just a few of the more than 100 exciting roles available. At Lawrence Livermore, you'll work on projects that matter, from national security to cutting edge scientific advancements. Join a team that values innovation, collaboration, and professional growth.

• 5:34Speaker 00

  Explore opportunities at llnl.gov/careers, where your next career move could make history.

• 5:46Speaker 00

  The idea for the National Ignition Facility began decades ago with physicist John Knuckles. He and his colleagues at Lawrence Livermore National Laboratory theorized that lasers could be the key to unlocking the immense power of fusion. At the time, fusion had been achieved in nuclear weapons, but the challenge of triggering it without a nuclear reaction remained unsolved.

• 6:09Speaker 02

  So that's really when it started, in the 60s. And they were working on deterrence. And they were looking at ways to trigger a fusion reaction and have peaceful use of fusion reactions that would be triggered by a non-nuclear primary reaction.

• 6:26Speaker 00

  That's Jean-Michel Di-Nicola, the co-program director for Laser Science and Systems Engineering at NIF.

• 6:33Speaker 02

  And so they looked at many options. And when the laser was demonstrated, they had a "ah" moment because they said, "Well, it checks all the boxes." "It's a focused source of energy. We can use that source of energy over a short period of time, tens of billions of a second."

• 6:53Speaker 00

  This breakthrough led to a series of record-setting lasers that became the foundation for NIF. Completed in 2009, the National Ignition Facility began with a major goal: to achieve fusion ignition for the purpose of national security. Over the next 15 years, Lawrence Livermore National Laboratory worked tirelessly to push the boundaries of high-energy density physics and move closer to achieving this goal.

• 7:20Speaker 03

  Fusion ignition means that we actually can generate more energy out from the experiment than it actually took to drive with the laser. And that was what we accomplished back in December 2022 for the first time ever in the world, where we actually got more energy out. We got three units of energy out for only putting in two units of laser energy.

• 7:44Speaker 00

  That's Gordon Brunton, the National Ignition Facility Director. His job is to oversee and maintain the world's most energetic laser.

• 7:53Speaker 03

  With Einstein's E equals mc squared, we proved that this is possible to get more out with the use of some mass from the target fuel capsule.

• 8:02Speaker 00

  Einstein's E equals mc squared shows us that mass and energy are interchangeable. In this experiment, a tiny portion of the fuel's mass was transformed into a massive amount of energy, which explains how much more energy can come out than what was originally put in.

• 8:20Speaker 03

  Similar conditions exist on the Sun, and they also exist in nuclear weapons. We use these conditions to test our theories to make sure we have a safe, secure, and viable deterrent if we ever had to need it.

• 8:33Speaker 00

  Nowhere else on Earth will you find access to the types of conditions achievable at NIF. This unique capability allows scientists to conduct experiments that continue to ensure the safety and reliability of the nation's nuclear stockpile without the need for underground testing, making it an essential part of maintaining national security.

• 8:55Speaker 02

  Basically, NIF is the only instrument where we can push the cursor in terms of pressure and temperatures. There is nowhere else. Again, the temperature that we generate are more than 10 times the temperature at the center of the sun.

• 9:07Speaker 00

  But thousands of experiments at extreme temperatures and pressures have taken their toll. Jeff Horner, project manager for the NIF sustainment project, explains the challenge.

• 9:17Speaker 04

  They're significant systems that need to be taken apart and sustained to have some maintenance. But while we're doing that, we want to continue operating the system to support users' experiments. And so those two are, by their very nature, at odds with each other, right? To run the system, you need to not take it apart. And so that's the challenge of sustainment.

• 9:43Speaker 00

  But Lawrence Livermore has a plan. The NIF sustainment project involves far more than routine maintenance of the facility. It demands significant refurbishment to ensure the facility continues to meet its goals. Think of it like owning a modern car. It's built for reliability, but requires regular upkeep to perform at its best. Routine oil changes and tune-ups keep it running smoothly over the miles. At NIF, this routine care happens during facility maintenance and refurbishment periods, which occur three times a year and last one to three weeks. However, even the most reliable car eventually needs more extensive maintenance, like replacing major parts that routine checks can't fix.

• 10:27Speaker 00

  Delaying this work risks pushing the vehicle past its limits. But handling it requires taking the car off the road while it's being worked on. The same principle applies to NIF. Routine maintenance keeps it operational, but age and wear have impacted capabilities and pushed the facility closer to its limit. NIF sustainment calls for extended maintenance, multiple periods lasting six to 10 weeks over a number of years, essential for the long-term health and use of NIF.

• 10:56Speaker 03

  We can fire to approximately about 400 experiments per year. Now, demand greatly exceeds that. Probably 2 to 4X is the number of proposals that we get to test different physics theories.

• 11:09Speaker 00

  Because of the enormous demand for access from the scientific community, the National Ignition Facility operates around the clock. 365 days a year, 24 hours a day. The constant unrelenting schedule takes its toll. Every component, from the amplifiers to the final optics assembly, is under immense strain.

• 11:31Speaker 04

  The way the amplifiers work is that there's flash lamps that illuminate the amplifier glass. And then, when the laser beam moves through that glass, it's amplified. And so between the flash lamps and the amplifier glass, there's a blast shield.

• 11:48Speaker 00

  Each of NIF's 192 high-energy laser beams travels over a mile-long path, bouncing off countless mirrors and passing through dozens of amplifiers. These beams begin as weak pulses in a master oscillator, but are amplified to over a trillion times their original energy by the time they strike their target. This process places stress on the system's components. The flash lamps, which pump energy into the laser beams, are shielded from debris by blast shields. These shields protect the amplifier glass, where the beams gain their power. Over time, however, the system faces challenges due to wear and tear.

• 12:28Speaker 00

  Blast shields are critical for protecting the amplifier glass from debris and intense flashes of light. These are facing issues due to degradation.

• 12:37Speaker 04

  The blast shields were put in as a system that wouldn't be replaced. They were built over in another building, and then the whole system was brought in and installed into the NIF. And so those blast shields, there's a seal that is particulating when it's hit with flash lamp light.

• 12:54Speaker 00

  The sealant on the blast shields has begun to degrade, shedding particles that affect both the flash lamps and the amplifier glass. This has necessitated a complete replacement of the blast shields to maintain the system's efficiency.

• 13:07Speaker 04

  The amplifier glass pieces are getting some contaminants on them.

• 13:12Speaker 00

  The amplifier glass collects microscopic contaminants each time the flash lamps fire. Over time, these contaminants scatter the laser light and reduce beam intensity. To address this, engineers are developing advanced cleaning and recoding processes to restore the performance of the glass slabs. Refurbishing the blast shields will also prevent them from further generating debris.

• 13:36Speaker 04

  We're going to pull those out, disassemble that limey replaceable unit, pull the pieces of glass out, and then again, building new capabilities in our optics processing. We'll clean those, recode them, put them back into the beam line.

• 13:50Speaker 00

  Replacing the blast shields is no small task because they were not originally designed to be removed.

• 13:56Speaker 04

  Those systems we find now need to be pulled out. And so our sustainment team is designing a piece of equipment that will grab this blast shield glass and its frame and pull it out. And then by the same token, that same piece of equipment will put the new one back in.

• 14:14Speaker 00

  With nearly 1,800 blast shields and 3,000 slabs of amplifier glass, each measuring 80 by 40 centimeters and weighing 100 pounds, this refurbishment represents a massive undertaking. Beyond the amplifiers, another critical part of NIF's laser system faces its own set of challenges: the final optics assembly, which contains four integrated optic modules, or IOMs.

• 14:40Speaker 02

  So close to the target chamber, we have what we call the final optic assembly, which are the components near the targets.

• 14:47Speaker 00

  NIF has a total of 192 IOMs, one for each beam line. The IOM is where the laser beams undergo their final transformation, being converted from infrared to ultraviolet light. This conversion process happens in two stages, with the beams first shifted from red to green, and then green to blue, before being focused down from a square roughly 40 centimeters wide to a beam as thin as a human hair.

• 15:13Speaker 02

  And we also saw significant debris accumulation because some of the volumes are in direct communication with the target chamber. So when the target is vaporized and we have high-velocity particles ejected, those debris accumulates and are hampering and lowering the performance of the final optics.

• 15:33Speaker 00

  To protect these sensitive components, the IOM is equipped with several shields that must be regularly removed, repaired, and reinstalled. However, over time, the entire module has accumulated a large amount of debris, some of which originates from the experiments themselves, while other sources of debris remain under investigation. Each of NIF's 192 IOMs will be removed, refurbished, and replaced. Another huge undertaking. This ongoing work is just one example of the careful maintenance and innovation required to keep NIF at the cutting-edge of laser science and experimentation. These challenges highlight a deeper issue.

• 16:16Speaker 00

  NIF was built with cutting-edge technology, but that was over 20 years ago. Some supporting facilities are over 40 years old. Now, critical components that were once top-of-the-line are reaching the end of their useful life, and maintaining performance in an aging system is getting harder every day.

• 16:36Speaker 04

  As the result of operating the system for a decade-plus, and we've seen some level of degradation. As we've moved into the ignition phase, where we're seeing higher neutrons produced from a target, we're seeing additional risk to some electronics that are damaged by neutrons.

• 16:56Speaker 00

  But it's not just about replacing damaged parts or finding ways to replace systems that weren't meant to be removed. Equipment within the facility is facing another problem: obsolescence.

• 17:10Speaker 00

  Lawrence Livermore National Laboratory is hiring. If you're passionate about tackling real-world challenges in science, engineering, business, or skilled trades, there's a place for you at the lab. Right now, positions are open for a Senior Guidance, Navigation, and Controls Engineer, and a Senior Business Operations Specialist. These are just a few of the more than 100 exciting roles available. At Lawrence Livermore, you'll work on projects that matter, from national security to cutting-edge scientific advancements. Join a team that values innovation, collaboration, and professional growth. Explore opportunities at llnl.gov/careers,

• 17:55Speaker 00

  where your next career move could make history.

• 18:05Speaker 03

  So you can imagine that the systems that were bleeding edge back in the early 2000s when we built them are now kind of reaching the point of obsolescence.

• 18:15Speaker 00

  The National Ignition Facility is pushing the boundaries of scientific discovery. From its inception, many milestones in its development have required the creation of entirely new technologies. This means the challenges the facility faces aren't just difficult, they're unprecedented. Each step forward reveals new complexities requiring bold ideas and innovative breakthroughs. This ongoing mission of NIF's sustainment is a meticulous effort to restore the facility to meet its original ambitious design specifications. A task that involves reimagining and perfecting systems that were themselves revolutionary at the time of their creation.

• 18:57Speaker 00

  At NIF, problem solving isn't just a necessity, it's a continuous act of invention.

• 19:03Speaker 05

  It's really taking a facility that is using technology that was state of the art 20 years ago and in many cases may not even be available right now. And so we really have to make sure that the laser is capable of focus of operating 24/7, right? And that we're using technology that is readily available.

• 19:25Speaker 00

  That's Larry Pels, the deputy group leader for Laser Science Systems Engineering. He's been working on the NIF laser system for the past 15 years.

• 19:35Speaker 05

  And so for part of sustainment is looking at areas where the facility is either aging or technologies have become obsolete and looking at bringing in new technologies and replacing these obsolete or antiquated technologies.

• 19:48Speaker 00

  But finding the right replacement parts isn't always straightforward. In many cases, the original suppliers either no longer exist or can't meet the current demands.

• 19:59Speaker 04

  During the sustainment process, one of the things that we're finding is that many of the component suppliers don't exist or don't have the capabilities. As we look at that, we have to figure out what's the right way to address that is.

• 20:12Speaker 00

  There's little room for error when conducting experiments at NIF where precision and reliability are everything. It has an experimental success rate of over 95% and fewer than 30 days of unplanned downtime in over 15 years of SHOT operations.

• 20:29Speaker 03

  And we observed that degradations in our systems, increased failures, et cetera, that caused us to be able to shoot less shots per year. And so we started observing a kind of trend that we wanted to take seriously and so get on top of it. And we started doing a comprehensive assessment of all our systems, looking at failure rates, looking at sparing that we have on this back in 2019. And then we kind of ranked ordered the systems that were at biggest risk to our continued operation.

• 21:00Speaker 00

  The results of that assessment led to a major planning effort involving the refurbishment of critical systems, including laser amplifiers, diagnostic equipment, utility systems, control electronics, and more.

• 21:13Speaker 03

  It comprises of about 30 large-scale projects to refurbish a lot of the equipment that's been very well-performing up until now. The goal is that we embark upon this, refurbish many of our critical systems to allow us to continue operating at the current or even higher performance levels.

• 21:32Speaker 00

  Thirty projects over several years. They range from cleaning debris to replacing parts with current technologies and materials. It is a serious investment in the facility and a vision for the future needs of the Stockpile Stewardship Programme. The projects are listed out in order of risk to the machine so that the most important jobs get done first.

• 21:53Speaker 04

  So we've done a risk assessment of the different areas of NIF. In a five-year horizon, what's the risk or the probability that a system will fail and cause an extended downtime for NIF?

• 22:06Speaker 00

  Not only will these 30 projects focus on replacing aging parts, but they will also develop a new generation of experts to tackle future challenges. With many of the original team members having moved on, NIF will be pushing forward with fresh eyes and fresh hands, ensuring the facility remains on the cutting edge.

• 22:24Speaker 04

  The workforce that built NIF, the engineers, the physicists, that was 20 years ago, and many of them have moved on, have retired, have fading recollections of the details back of the initial build.

• 22:39Speaker 00

  The team at NIF looks at this as another opportunity to build up a new generation of scientists and engineers.

• 22:45Speaker 04

  It is also taking a staff that is less familiar with the systems that we're sustaining or maintaining and giving them the opportunity to learn and become experts on the systems.

• 22:58Speaker 00

  Something extraordinary is happening at NIF. Every day, the world's brightest minds gather here to test new theories and push the boundaries of human understanding, all in service to the nation's security mission. Achieving fusion ignition in 2022 was a historic milestone, unlocking unprecedented opportunities in high-energy-density physics. This breakthrough has directly advanced the National Nuclear Security Administration's science-based stockpile stewardship program.

• 23:27Speaker 02

  We demonstrated the first proof-of-principle challenges are numerous in front of us, but they were also very exciting.

• 23:35Speaker 00

  The successful completion of sustainment is essential to carrying out a proposed upgrade to NIF that would allow its laser energy to be raised, unlocking fusion yields more than 10 times greater than that of the first ignition experiment. This work ensures not just the sustainment of an extraordinary facility, but the sustainment of hope. Hope for a safer, more secure world. As we look forward, one thing is clear: The story of NIF is not just about sustaining the past, it's about igniting the future.

• 24:24Speaker 00

  Thank you for tuning in to Big Ideas Lab. If you loved what you heard, please let us know by leaving a rating and a review. And if you haven't already, don't forget to hit the follow or subscribe button in your podcast app to keep up with our latest episode. Thanks for listening.