Logan Fegenbush

New design yields robust large-area framing camera

Amy Lewis, Stuart A. Baker, Andrew Corredor, Logan Fegenbush et autres

Framing cameras provide a discrete series of images over a short period of time in a manner that mimics a high-speed movie camera but with individual shutter times that must be extremely short in order to capture freeze-frame images of rapidly evolving …

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Kraken Camera Development and Fielding Overview [Slides]

Logan Fegenbush

Presentation to be given at a LANL radiography workshop to be held April 6 at LANL LANSCE. This presentation is a shortened version of an earlier presentation made on the Kraken camera (DOE/NV/03624--0924) with some additional content.

Image restoration of high-energy X-ray radiography with a scintillator blur model

D. Smalley, Stuart A. Baker, Brandon Baldonado, Jesus J. Castaneda et autres

High-energy X-ray radiographic image restoration is performed using a simulated radiation point spread function and an experimentally derived optical point spread function. It is shown that a robust method for removal of thick monolithic scintillator blur can be determined through independent examination …

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FY19 L2 MRT 6744 Milestone Completion: Digital Time-Resolved Spot Diagnostic (D-TRSD)

Nevada National Security Site (NNSS), Las Vegas, NV (United States), Darryl Droemer, Office of Defense Programs (DP) USDOE National Nuclear Security Administration (NNSA), Stuart G. Baker et autres

This milestone report describes development of the Digital Time-Resolved Spot Diagnostic (D-TRSD) into a functioning diagnostic that has been proven in the laboratory. Laboratory tests complete the MRT 6744 exit criteria with the recording and analysis of a spot size measurement for …

Digital time-resolved spot diagnostic

Logan Fegenbush, Matthew Martin, Zak Fitzpatrick, Santiago Olguin et autres

The digital time-resolved spot diagnostic (D-TRSD) is intended to be a fast-response, time-dependent beam diagnostic for measuring the spot size emitted from radiographic x-ray sources. It will measure spot sizes from submillimeters up to several millimeters for photon energies in the range …

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Digital Time-Resolved Spot Diagnostic

Logan Fegenbush

The digital time-resolved spot diagnostic (D-TRSD) is a fast-response, time-dependent beam diagnostic for measuring the emitted spot size and beam target interactions from radiographic x-ray sources. Legacy streaked TRSD analysis requires image processing and data extraction, which give noisy results. Processed data …

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Characterization of the Mercury pulsed power x-ray source spectrum using multichannel density aerogel Cherenkov detectors

K. D. Meaney, Y. Kim, H. W. Herrmann, Calvin Young et autres

aerogels spanning an index of refraction (n = 1.02-1.07) corresponding to a 1.1-2.3 MeV x-ray energy threshold. The ACD/C was developed for pulsed power x-ray sources like Cygnus located at the Nevada National Site and Mercury located at the Naval Research Laboratory …

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Effect of emission models on particle-in-cell simulations of a large-area bremsstrahlung diode operating at 5 MV with comparison to experimentally measured dose

A. S. Richardson, J. C. Zier, S. L. Jackson, J. W. Schumer et autres

Recent experiments on the Mercury pulsed power accelerator were performed with a large-area bremsstrahlung diode operated at 5 MV. Extensive measurements of the x-ray dose distribution were made using TLDs, both in the near field and far field of the x-ray beam. …

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