Lawrence Livermore National Laboratory scientists have developed a new polishing system capable of finishing flat and spherical glass optics in a single iteration, regardless of the workpieces’ initial shape. Convergent Polishing: Rapid, Simple, Low Cost Finishing of High Quality Glass Optics is able to “converge” several steps because factors contributing to non-uniform spatial material removal on the workpiece have been eliminated and the creation of rogue particles within the polisher system have been removed.
Spectral beam combining (SBC) of fiber lasers offers a straightforward approach for power scaling. The approach exploits the broad gain bandwidth to enable large numbers of fiber laser channels to be combined with near-diffraction-limited beam quality. Rigorous application of SBC has allowed a development team including Lawrence Livermore National Laboratory, Lockheed Martin Laser and Sensor Systems and Advanced Thin Films to develop the EXtreme-power, Ultra-low-loss, Dispersive Element (EXUDE) optical element, the first-ever electrically efficient, near diffraction-limited 30-kW beam combined laser.
Filling major gaps in field testing for explosives and narcotics, Lawrence Livermore National Laboratory’s microTLC is a miniaturized, field-portable thin layer chromatography (TLC) kit used to detect and identify unknowns. Originally developed to identify military explosives, the device has been modified to also identify and determine the purity of illicit drugs, pesticides and other compounds.
Materials like solid gels and porous foams are used for padding and cushioning, but each has its own advantages and limitations. To overcome limitations, a team from Lawrence Livermore National Laboratory has found a way to design and fabricate, at the microscale, new cushioning materials with a broad range of programmable properties and behaviors that exceed the limitations of the material's composition through 3-D printing.
X-ray spectroscopy is widely used to determine the elemental and chemical composition of materials. However, Lawrence Livermore National Laboratory and STAR Cryoelectronics LLC’s Superconducting Tunnel Junction (STJ) X-ray Spectrometer offers more than 10 times higher energy resolution than current x-ray spectrometers based on silicon or germanium semiconductors.
Lawrence Livermore National Laboratory researchers have made a material that is 10 times stronger and stiffer than traditional aerogels of the same density. This ultra-low-density, ultra-high surface area bulk material with an interconnected nanotubular makeup could be used in catalysis, energy storage and conversion, thermal insulation, shock energy absorption and high energy density physics.
Lawrence Livermore National Laboratory scientists for the first time have experimentally re-created the conditions that exist deep inside giant planets, such as Jupiter, Uranus and many of the planets recently discovered outside our solar system. Researchers can now re-create and accurately measure material properties that control how these planets evolve over time, information essential for understanding how these massive objects form.
Lawrence Livermore National Laboratory scientists are developing electrode array technology for monitoring brain activity as part of a collaborative research project with the Univ. of California San Francisco (UC San Francisco) to better understand how the neural circuitry of the brain works during memory retrieval.
A microbe detection array technology developed by Lawrence Livermore National Laboratory (LLNL) scientists could provide a new rapid method for public health authorities to conduct surveillance for emerging viral diseases. This possible use of the Lawrence Livermore Microbial Detection Array (LLMDA) was studied by an international team of researchers from eight nations in a paper published in the PLOS ONE.
Lithium-ion batteries could benefit from a theoretical model created at Rice Univ. and Lawrence Livermore National Laboratory that predicts how carbon components will perform as electrodes. The model is based on intrinsic electronic characteristics of materials used as battery anodes. These include the material’s quantum capacitance and the material’s absolute Fermi level.
Measuring the extreme pressures and temperatures of hydrothermal systems in the Earth's crust is no easy feat. However, Lawrence Livermore National Laboratory scientists have made a new tool that allows them to probe pressures up to 20 kbar (20,000 Earth atmospheres of pressure).
The absorption of petawatt laser light by solid matter is a crucial problem that has been the subject of theoretical and experimental study for more than two decades. In a newly published paper, Lawrence Livermore National Laboratory scientists have defined, for the first time, a set of theoretical boundaries for the absorption of petawatt laser light.
Imagine a material with the same weight and density as aerogel—a material so light it's called “frozen smoke”—but with 10,000 times more stiffness. This material could have a profound impact on the aerospace and automotive industries as well as other applications where lightweight, high-stiffness and high-strength materials are needed.
A biological detection technology developed by Lawrence Livermore National Laboratory scientists can detect bacterial pathogens in the wounds of U.S. soldiers that have previously been missed by other technologies. This advance may, in time, allow an improvement in how soldiers' wounds are treated.
Lawrence Livermore National Laboratory researchers have developed a new and more efficient approach to a challenging problem in additive manufacturing—using selective laser melting, namely, the selection of appropriate process parameters that result in parts with desired properties.
Lawrence Livermore National Laboratory recently received $5.6 million from DARPA to develop an implantable neural interface with the ability to record and stimulate neurons within the brain for treating neuropsychiatric disorders. The technology will help doctors to better understand and treat post-traumatic stress disorder (PTSD), traumatic brain injury (TBI), chronic pain and other conditions.
Earlier this year, Lawrence Livermore National Laboratory engineering technical associate Pam Danforth applied 30 years of laser experience to an out-of-this-world problem—bringing new life to the Univ. of California's Lick Observatory Laser Guide Star. The Lick Observatory's Laser Guide Star is vital to astronomers because a natural guide star isn't always near an object they want to observe.
New research by an international consortium may help physicians better understand the chronological development of a brain aneurysm. Using radiocarbon dating to date samples of ruptured and unruptured cerebral aneurysm tissue, the team, led by neurosurgeon Nima Etminan, found that the main structural constituent and protein—collagen type I—in cerebral aneurysms is distinctly younger than once thought.
Using one of the world's largest telescopes, a Lawrence Livermore National Laboratory team and international collaborators have tracked the orbit of a planet at least four times the size of Jupiter. The scientists were able to identify the orbit of the exoplanet, Beta Pictoris b, which sits 63 light-years from our solar system, by using the Gemini Planet Imager's next-generation, high-contrast adaptive optics system.
Element 117, first discovered by Lawrence Livermore National Laboratory scientists and international collaborators in 2010, is one step closer to being named. The existence of element 117 and its decay chain to elements 115 and 113 have been confirmed by a second international team led by scientists at GSI Helmholtz Centre for Heavy Ion Research, an accelerator laboratory located in Darmstadt, Germany.
In 2010 Lawrence Livermore National Laboratory introduced a new type of electron microscope that could study structural dynamics in condensed matter with the help of a nanosecond laser “pump” that could capture images. In 2013, the laboratory won another R&D 100 Award for speeding up this process more than 100,000 times, resulting in a “movie-mode” version of the instrument.
Using an ultra-fast laser system, a group in Physical and Life Sciences at Lawrence Livermore National Laboratory have subjected iron to extremely rapid dynamic compression and have shown that the transition from one crystal structure to another can take place in less than 100 trillionths of a second after the compression begins.
Glaciers and ice sheets are commonly thought to work like a belt sander. As they move over the land they scrape off everything, including vegetation, soil and even the top layer of bedrock. So a team of university scientists and a NASA colleague were greatly surprised to discover an ancient tundra landscape preserved under the Greenland Ice Sheet, below two miles of ice.
For nearly a century, electrophoretic deposition (EPD) has been used as a method of coating material by depositing particles of various substances onto the surfaces of various manufactured items. Since its earliest use, EPD has been used to deposit a wide range of materials onto surfaces. This process works well, but is limited. EPD can only deposit material across the entire surface and not in specific, predetermined locations, until now.
Joint BioEnergy Institute scientists have identified the genetic origins of a microbial resistance to ionic liquids and successfully introduced this resistance into a strain of E. coli bacteria for the production of advanced biofuels. The ionic liquid resistance is based on a pair of genes discovered in a bacterium native to a tropical rainforest in Puerto Rico.