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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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121 records · Page 7
All sourcesNASA NTRSDOE OSTI
DOE OSTI2023

Reflections

Flash radiography is a much used diagnostic technique for high-explosively driven hydrodynamic experiments. Two linear-induction electron accelerators (LIAs) at the Los Alamos Dual Axis Radiography of Hydrodynamic Tests (DARHT) facility provide the source spots for point projection radiography of exceptionally large and dense experiments. In these LIAs, the beam acceleration is provided by high-voltage pulses applied to a number of inductively isolated gaps. The high-voltage pulses are produced by remotely located pulsedpower generators and delivered to the gaps by long highvoltage cables. For Scorpius, these pulse generators are called line replacement units (LRUs).

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND ↗
DOE OSTI2023

Fall 2023 Co-Op Summary [Slides]

This report describes an overview of the activities of Noah Logan Jones during their Fall 2023 semester spend at Los Alamos National Laboratory (LANL), specifically with the Dual-Axis Radiographic Hydrodynamic Test Facility (DARHT), Deimos, and DDC. It also includes a brief description of their future work, challenges and successes, and lessons learned.

96 KNOWLEDGE MANAGEMENT AND PRESERVATION↗
DOE OSTI2024

Multi-Probe Radiography: For 2035 and Beyond

The Multi-Probe Radiography Project is investigating the use of multiple species of probe beams to provide more information from a radiography. Contextual radiographic, source, and measurements information is being provided through a series of four workshops at Los Alamos National Laboratory. The third workshop on Accelerator and Pulsed Power Technology is summarized in this report. The state of the large NNSA facilities such as Scorpius, DARHT, pRad, and Cygnus are presented. Future enhancements and innovative upgrades are also discussed.

43 PARTICLE ACCELERATORS↗
DOE OSTI2018

Calibration of two compact permanent magnet spectrometers for high current electron linear induction accelerators

In this work, two compact, permanent magnet, electron spectrometers have been built to measure the electron beam energy at the Dual Axis Radiographic Hydrodynamic Test facility. Using H - and OH - anions, the spectrometers were calibrated at the Special Technologies Laboratory in Santa Barbara, California (USA). The spectrometers were mounted on a custom drift tube that allows the magnet assemblies to be translated, which increases the path length of the electrons traveling through the magnetic field and therefore increases the upper bound of the measurable electron kinetic energy. The measurable range of electron kinetic energies is between 2.8 MeV–4.1 MeV for the first spectrometer and 14.1 MeV–21.1 MeV for the second spectrometer, with an overall measurement uncertainty of 0.32%.

47 OTHER INSTRUMENTATION↗
DOE OSTI2019

3D Particle-In-Cell Model of Axis-I: Cathode to Target Single-Code Development for Scorpius

Presentation summary: We are validating the Cathode-to-Target PIC model for Scorpius using Axis-I data and envelope codes. Results include particle transport and phase-space information. Future Work: Charge neutralization and ion focusing via target interactions, (example on next slide) investigation of misalignments of solenoid and accelerating gap fields, and investigation of chromatic effects due to pulsed power fluctuations. The bottom line is determining the impact on spot size.

43 PARTICLE ACCELERATORS↗
DOE OSTI2023

Fedora, Fission, and Freedom [Slides]

Project Y laid the foundation for all work currently performed at LANL. LANL is responsible for the stewardship of most of the U.S. nuclear weapons, facilitates global security and nonproliferation, and has been a Federally Funded Research and Development Center (FFRDC) for more than 75 years.

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEF↗