Search Results - "Earnhart, J"

Modulation transfer function for a large-area amorphous silicon image receptor by Earnhart, J R, Chaney, E L

“…The modulation transfer function (MTF) of an amorphous silicon (aSi) sensor array was measured using proper sampling techniques to determine the edge spread…”
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Visible light emission measurements from a dense electrothermal launcher plasma by Hankins, O.E., Bourham, M.A., Earnhart, J., Gilligan, J.G.

“…Measurements of the visible light emission from dense, weakly nonideal plasmas have been performed on the experimental electrothermal launcher device SIRENS…”
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Investigation of plasma-augmented solid propellant interior ballistic processes by Greig, J.R., Earnhart, J., Winsor, N., McElroy, H.A., Juhasz, A.A., Wren, G.P., Morrison, W.F.

“…Experimental gun firings and computer simulations of hybrid solid propellant-electrothermal gun propulsion concepts are reported. The test firings were…”
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Comparative study of component erosion for electromagnetic and electrothermal launchers by Bourham, M.A., Hankins, O.E., Gilligan, J.G., Hurley, J.D., Earnhart, J.R.

“…The electrothermal launcher SIRENS has been used to study the erosion of critical components (rails and insulators) of plasma-driven launchers. SIRENS can…”
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A comparison of different intensity modulation treatment techniques for tangential breast irradiation by Chang, S X, Deschesne, K M, Cullip, T J, Parker, S A, Earnhart, J

“…Several intensity modulation (IM) treatment techniques for tangential breast irradiation were evaluated in terms of dose uniformity in the treated breast…”
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Simulation of Compton camera imaging with a specific purpose Monte Carlo code by Earnhart, Jonathan, Prettyman, Thomas, Lestone, John, Gardner, Robin

“…A specific purpose Monte Carlo model that treats the physical processes of image formation in Compton cameras is presented. Features of the model include:…”
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Core-based portal image registration for automatic radiotherapy treatment verification by Fritsch, D S, Chaney, E L, Boxwala, A, McAuliffe, M J, Raghavan, S, Thall, A, Earnhart, J R

“…Portal imaging is the most important quality assurance procedure for monitoring the reproducibility of setup geometry in radiation therapy. The role of portal…”
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Performance of CdZnTe detectors passivated with energetic oxygen atoms by Prettyman, T.H, Hoffbauer, M.A, Rennie, J.A, Cook, S, Gregory, J.C, George, M.A, Luke, P.N, Amman, M, Soldner, S.A, Earnhart, J.R

“…Noise caused by surface-leakage current can degrade the performance of CdZnTe spectrometers, particularly devices with closely spaced contacts such as coplanar…”
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Benchmark test cases for evaluation of computer-based methods for detection of setup errors: realistic digitally reconstructed electronic portal images with known setup errors by Fritsch, D S, Raghavan, S, Boxwala, A, Earnhart, J, Tracton, G, Cullip, T, Chaney, E L

“…The purpose of this investigation was to develop methods and software for computing realistic digitally reconstructed electronic portal images with known setup…”
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Comparative study of component erosion for electromagnetic and electrotermal launchers by BOURHAM, M. A, HANKINS, O. E, GILLIGAN, J. G, HURLEY, J. D, EARNHART, J. R

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Spectroscopic Measurements Of Visible Light Emissions From Electrothermal Launcher by Hankins, O.E., Bourham, M.A., Earnhart, J., Gilligan, J.G.

“…Measurements of the visible light emission from dense, weakly non-ideal plasmas have been performed on the experimental electrothermal launcher device…”
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Erosion Of Plasma-exposed Surfaces In An Electrothermal Accelerator by Earnhart, J.R., Bourham, M.A., Hankins, O.E., Gilligan, J.G.

“…Erosion of material surfaces exposed to high heat fluxes produced by plasmas in electrothermal accelerators has been studied. The incident heat flux varies…”
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Experimental high heat load surface damage of graphite and refractory materials by Bourham, M.A., Hankins, O.E., Eddy, W.H., Hurley, J.D., Earnhart, J.R., Gilligan, J.G.

“…Different grades of graphite and refractory material surfaces were exposed to pulsed high heat fluxes between 2 and 60 GW/m/sup 2/. Graphite ablation is…”
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