M. E. Weller
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View article: Lowering reporting limit values for respirable crystalline silica analysis by X-ray diffraction in preparation of the 0.025 mg/m3 occupational exposure limit
Lowering reporting limit values for respirable crystalline silica analysis by X-ray diffraction in preparation of the 0.025 mg/m3 occupational exposure limit Open
Internationally, respirable crystalline silica (RCS) occupational exposure limits (OELs) are being reassessed and, in some jurisdictions, lowered, putting pressure on the capabilities of the analytical techniques used to achieve robust ana…
View article: Machine learning and Bayesian optimization for pulse shaping on a linear induction accelerator
Machine learning and Bayesian optimization for pulse shaping on a linear induction accelerator Open
Conference: 14th International Particle Accelerator Conference Date: May 7th-12th, 2023 Location: Lido di Venezia, Italy Presenter: Evan R Scott
View article: Prospects for Machine Learning and Pulse Shaping on the Scorpius Accelerator [Poster]
Prospects for Machine Learning and Pulse Shaping on the Scorpius Accelerator [Poster] Open
The Advanced Sources and Detectors (ASD) project aims to build Scorpius, a multi pulse linear induction accelerator capable of delivering a 1.4 kA electron beam at energies up to 24 MeV. One of the primary advancements of Scorpius is the u…
View article: Beam Physics Simulations for the Scorpius Accelerator
Beam Physics Simulations for the Scorpius Accelerator Open
fields of cavities, the cooling induced by comoving beams, and the acceleration of beams by intense fields in plasmas generated by beams or lasers. In SciDAC-1, the computational tools had multiple successes in predicting the dynamics of b…
View article: Modeling Fast-Valve in Chicago to Check for RF Oscillations and Beam Degradation
Modeling Fast-Valve in Chicago to Check for RF Oscillations and Beam Degradation Open
be used to augment check valve preventive maintenance programs by providing the plant engineer with quantitative and conservative estimates of damage potential for check valve internals. 21 refs., 30 figs., 8 tabs.
View article: Dynamics of the super pinch electron beam and fusion energy perspective
Dynamics of the super pinch electron beam and fusion energy perspective Open
The characterization of a high current, relativistic electron beam, designated the Super Pinch electron beam, has been performed using compact pulsed-power accelerators of various architectures with a novel diode geometry. The Thunderbird …
View article: Downstream Transport Beam Spill with Particle In Cell (PIC) code Lsp [Slides]
Downstream Transport Beam Spill with Particle In Cell (PIC) code Lsp [Slides] Open
Although induction cells make up over 90% of the total accelerator length, the injector and downstream transport regions involve 90% of the modeling effort.
View article: Observation of He-like Satellite Lines of the H-like Potassium K xix Emission
Observation of He-like Satellite Lines of the H-like Potassium K xix Emission Open
We present measurements of the H-like potassium (K xix ) X-ray spectrum and its He-like (K xviii ) satellite lines, which are situated in the wavelength region between 3.34 and 3.39 Å, which has been of interest for the detection of dark m…
View article: Electron-density-sensitive Line Ratios of Fe xiii– xvi from Laboratory Sources Compared to CHIANTI
Electron-density-sensitive Line Ratios of Fe xiii– xvi from Laboratory Sources Compared to CHIANTI Open
We present electron-density-sensitive line ratios for Fe xiii – xvi measured in the spectral wavelength range of 200–440 Å and an electron density range of (1–4) × 10 13 cm −3 . The results provide a test at the high-density limit of densi…
View article: New Regimes of Implosions of Larger Sized Wire Arrays With and Without Modified Central Plane at 1.5-1.7 MA ZEBRA.
New Regimes of Implosions of Larger Sized Wire Arrays With and Without Modified Central Plane at 1.5-1.7 MA ZEBRA. Open
International audience
View article: Three new extreme ultraviolet spectrometers on NSTX-U for impurity monitoring
Three new extreme ultraviolet spectrometers on NSTX-U for impurity monitoring Open
Three extreme ultraviolet (EUV) spectrometers have been mounted on the National Spherical Torus Experiment–Upgrade (NSTX-U). All three are flat-field grazing-incidence spectrometers and are dubbed X-ray and Extreme Ultraviolet Spectrometer…