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Your search keyword '"Moschella, J. J."' showing total 26 results
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26 results on '"Moschella, J. J."'

1. An intense lithium ion beam source using vacuum baking and discharge cleaning techniques.

Author

Moschella, J. J., Kusse, B. R., Longfellow, J. P., and Olson, J. C.

Subjects
*ION bombardment, *LITHIUM
Abstract

Presents a study that developed a lithium ion beam source using vacuum baking and discharge cleaning techniques. Factors that reduce the impurity concentration in the beam; Comparison of the electrical characteristics of the beams produced by lithium chloride anodes to those generated by a standard polyethylene proton source; Nature of the impurities.

Published
1991
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2. Investigation of current channel migration in a conducting plasma between planar electrodes.

Author

Spanjers, G. G., Yadlowsky, E. J., Hazelton, R. C., and Moschella, J. J.

Subjects
MAGNETIC fields, PLASMA electrodynamics
Abstract

Presents information on a study that characterized magnetic-field penetration in a current conducting plasma between planar electrodes used as a plasma opening switch. Methodology of the study; Results and discussion on the study; Conclusions.

Published
1996
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3. Characterization of magnetohydrodynamic effects in a plasma opening switch.

Author

Spanjers, G. G., Yadlowsky, E. J., Hazelton, R. C., and Moschella, J. J.

Subjects
PLASMA dynamics, MAGNETOHYDRODYNAMICS
Abstract

Presents information on a study that characterized plasma dynamics in a long-conduction time plasma opening switch operated with densities and currents near the theoretical intersection of the magnetohydrodynamic and electronmagnetohydrodynamic regimes. Methodology of the study; Results and discussion on the study; Conclusions.

Published
1995
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4. Influence of Xe and Kr impurities on x-ray yield from debris-free plasma x-ray sources with an Ar supersonic gas jet irradiated by femtosecond near-infrared-wavelength laser pulses

Author

Kantsyrev, V. L., primary, Schultz, K. A., additional, Shlyaptseva, V. V., additional, Petrov, G. M., additional, Safronova, A. S., additional, Petkov, E. E., additional, Moschella, J. J., additional, Shrestha, I., additional, Cline, W., additional, Wiewior, P., additional, and Chalyy, O., additional

Published
2016
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5. Characterization of pure and mixed Ar, Kr and Xe gas jets generated by different nozzles and a study of X-ray radiation yields after interaction with a sub-ps laser pulse

Author

Schultz, K. A., primary, Kantsyrev, V. L., additional, Safronova, A. S., additional, Moschella, J. J., additional, Wiewior, P., additional, Shlyaptseva, V. V., additional, Weller, M. E., additional, Petkov, E. E., additional, Shrestha, I. K., additional, Stafford, A., additional, and Cooper, M. C., additional

Published
2016
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7. Study of x-ray generation from noble gases mixture jets irradiated by unr FS-Leopard laser with different pulse contrast

Author

Kantsyrev, V. L., primary, Safronova, A. S., additional, Schultz, K. A., additional, Shlyaptseva, V. V., additional, Shrestha, I., additional, Cooper, M. C., additional, Petkov, E. E., additional, Stafford, A., additional, Cline, W., additional, Wiewior, P., additional, Moschella, J. J., additional, and Chalyy, O., additional

Published
2015
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12. Analyzing spatially resolved line spectra emitted by Z pinches

Author

Apruzese, J. P., primary, Davis, J., additional, Whitney, K. G., additional, Yadlowsky, E. J., additional, Carlson, E. P., additional, Niemel, J., additional, Barakat, F., additional, Hazelton, R. C., additional, Klepper, C. C., additional, Moschella, J. J., additional, Failor, B. H., additional, Levine, J. S., additional, Riordan, J. C., additional, Song, Y., additional, and Whitton, B. L., additional

Published
2000
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15. Increased kilo-electron-volt x-ray yields fromZ-pinch plasmas by mixing elements of similar atomic numbers

Author

Deeney, C., primary, LePell, P. D., additional, Failor, B. H., additional, Wong, S. L., additional, Apruzese, J. P., additional, Whitney, K. G., additional, Thornhill, J. W., additional, Davis, J., additional, Yadlowsky, E., additional, Hazelton, R. C., additional, Moschella, J. J., additional, Nash, T., additional, and Loter, N., additional

Published
1995
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21. Time-Resolved Spectroscopy and Energy-Resolved Imaging of Coated Wire Arrays as the Interwire Spacing is Decreased.

Author

Failor, B. H., Deeney, C., LePell, P. D., Riordan, J. C., Apruzese, J. P., Thornhill, J. W., Whitney, K. G., Nash, T. J., Yadlowsky, E. J., and Moschella, J. J.

Subjects
X-rays, SPECTRUM analysis
Abstract

Focuses on a study that described X-ray spectroscopic measurements of coated wire loads on wire-array stagnation dynamics at high currents and short implosion times. Methodology; Results; Conclusion.

Published
2002
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22. Ion Beam Propagation in a Solenoidal Magnetic Field

Author

CORNELL UNIV ITHACA NY LAB OF PLASMA STUDIES, Moschella, J. J., Kraft, R., Kusse, B. R., CORNELL UNIV ITHACA NY LAB OF PLASMA STUDIES, Moschella, J. J., Kraft, R., and Kusse, B. R.

Abstract

An experimental study of an intense space charge neutralized ion beam propagating into a solenoidal magnetic field is presented. The data shows that the observed effects are adequately described by a theory for beam propagation. In a previous experiment a similar beam was focused by a short magnetic field where the focal point was outside the field region. This experiment shows that the same theory can be used to describe a beam which comes to a focus within the uniform region of the solenoid. The theory essentially states that ions undergo single particle motion modified by the beam neutralizing electrons which produces focal distances much shorter than ions acting alone. The physics of this type of focusing is similar to the Gabor lens in which electrons that prefill a magnetic mirror produce electrostatic fields which assist in the focusing of a stream of ions. The new theory, assumes a cylindrically symmetric beam which does not significantly perturb the magnetic field, maintenance of local space charge neutrality and perfectly cold neutralizing electrons.

Published
1984

23. Tribo-mechanical properties of thin boron coatings deposited on polished cobalt alloy surfaces for orthopedic applications.

Author

Klepper CC, Williams JM, Truhan JJ, Qu J, Riester L, Hazelton RC, Moschella JJ, Blau PJ, Anderson JP, Popoola OO, and Keitz MD

Abstract

This paper presents experimental evidence that thin (< approximately 200 nm) boron coatings, deposited with a (vacuum) cathodic arc technique on pre-polished Co-Cr-Mo surfaces, could potentially extend the life of metal-on-polymer orthopedic devices using cast Co-Cr-Mo alloy for the metal component. The primary tribological test used a linear, reciprocating pin-on-disc arrangement, with pins made of ultra-high molecular weight polyethylene. The disks were cast Co-Cr-Mo samples that were metallographically polished and then coated with boron at a substrate bias of 500 V and at about 100 degrees C. The wear tests were carried out in a saline solution to simulate the biological environment. The improvements were manifested by the absence of a detectable wear track scar on the coated metal component, while significant polymer transfer film was detected on the uncoated (control) samples tested under the same conditions. The polymer transfer track was characterized with both profilometry and Rutherford Backscattering Spectroscopy. Mechanical characterization of the thin films included nano-indentation, as well as additional pin-on-disk tests with a steel ball to demonstrate adhesion, using ultra-high frequency acoustic microscopy to probe for any void occurrence at the coating-substrate interface.

Published
2008
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