A5075010030- Nuclear and radioactivity studies
- Nuclear Physics and Applications
- Graphite, nuclear technology, radiation studies
- Laser-Plasma Interactions and Diagnostics
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Particle Accelerators and Free-Electron Lasers
- Muon and positron interactions and applications
- Electric Motor Design and Analysis
- Astro and Planetary Science
- Fusion materials and technologies
- Risk and Safety Analysis
- Astrophysical Phenomena and Observations
- Planetary Science and Exploration
- Magnetic Bearings and Levitation Dynamics
- Magnetic confinement fusion research
- Advanced X-ray Imaging Techniques
- Space Exploration and Technology
- High-Velocity Impact and Material Behavior
- Tribology and Lubrication Engineering
- Particle Detector Development and Performance
- Flow Measurement and Analysis
- Chemical Safety and Risk Management
- Safety Systems Engineering in Autonomy
- Electromagnetic Launch and Propulsion Technology
Lawrence Livermore National Laboratory
2007-2024
Target (United States)
2023
University of Washington
1997
The application of an external 26 Tesla axial magnetic field to a D2 gas-filled capsule indirectly driven on the National Ignition Facility is observed increase ion temperature by 40% and neutron yield factor 3.2 in hot spot with areal density approaching what required for fusion ignition [1]. improvements are determined from energy spectral measurements 2.45 MeV neutrons D(d,n)3He reaction, compressed central core B estimated be ∼4.9 kT using 14.1 secondary D(T,n)4He reactions. experiments...
Magnetizing a cryogenic deuterium–tritium (DT)-layered inertial confinement fusion (ICF) implosion can improve performance by reducing thermal conduction and improving DT-alpha in the hot spot. A room-temperature, magnetized indirect-drive ICF platform at National Ignition Facility has been developed, using high-Z, high-resistivity AuTa4 alloy as hohlraum wall material. Experiments show 2.5× increase deuterium–deuterium (DD) neutron yield 0.8-keV hot-spot temperature with application of 12-T...
We describe experiments with a 45-cm long x-ray deformable mirror (XDM) that have been conducted in End Station 2, Beamline 5.3.1 at the Advanced Light Source. A detailed description of hardware implementation is provided. explain our one-dimensional Fresnel propagation code correctly handles grazing incidence and includes model XDM. This used to simulate verify experimental results. Initial trace profiler metrology XDM 7.5 keV presented. The ability measure large (150-nm amplitude) height...
Abstract This paper presents a detailed analysis of the dynamic behavior single rotor/stator brake system. Two separate mathematical models are considered. First, non-rotational model is constructed with purpose showing that friction induced vibration can occur in stator without assuming stick-slip and velocity dependent coefficient. Self-induced vibrations analyzed via application method multiple scales. The stability boundaries primary resonance, as well super-harmonics sub-harmonics...
We report on the current status of Adaptive X-ray Optics project run by Lawrence Livermore National Laboratory (LLNL). LLNL is collaborating with Advanced Light Source (ALS) to demonstrate a near real-time adaptive optic. To this end, custom-built 45 cm long deformable mirror has been installed at ALS beamline 5.3.1 (end station 2) for two-year period that started in September 2014. will outline general aspects instrument, present results from recent experimental campaign and touch future...
The use of strong magnetic fields to augment the output energy inertial confinement fusion experiments at National Ignition Facility is high interest. It offers potential reducing electron thermal conduction and increasing hot-spot alpha heating with little no change in hohlraum behavior. In these magnetically assisted ignition experiments, ultimate goal add a B-field form pulse ranging from 25 60 T high-performing implosion several microseconds before impingement laser beams. This requires...
Flow forming, an advanced version of metal spinning, is becoming a popular technique for the fabrication containers storage and transportation radioactive materials. A previous article by authors[1] gave cursory review operation, benefits, possible problems associated with this method. The same also addressed ASME Boiler & Pressure Vessel Code (ASME BPVC) requirements[2] method, recommended desirable quality control measures. One recommendations was that product be annealed after flow...
Damage localization is an important part of structural health monitoring. In this talk we present the results a method localizing pointlike damage in structure using changes vibrational response induced by damage. The measured at discrete locations on both before and after induced. difference used to drive numerical model undamaged (backpropagation). location marked peak calculated displacement field. Results are shown laboratory measurements cylinder two nested spherical half-shells....