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Your search keyword '"Doerner, R."' showing total 11 results
Start Over Author "Doerner, R." Journal physics of plasmas
11 results on '"Doerner, R."'

3. Neutralization processes of atomic/molecular deuterium ions assisted by ND3 in low density D2-N2 plasmas.

Author

Abe, S., Doerner, R. P., and Tynan, G. R.

Subjects
*PLASMA gases, *DEUTERIUM ions, *ELECTRON density, *ELECTRON temperature, *INDUCTIVELY coupled plasma spectrometry, *QUADRUPOLE mass analyzers
Abstract

The formation mechanisms of ND3+ and ND4+ are investigated in weakly ionized nitrogen-hydrogen plasmas with electron densities ne ∼ 1016 m−3 and electron temperatures Te ∼ 3 eV. The plasmas are created by an inductively coupled RF (13.56 MHz) discharge of 500 W at the total pressure of 10 mTorr in the nitrogen partial pressure ranging from 0.02 to 2.9 mTorr. The ion density fractions are measured by an electrostatic quadrupole plasma analyzer, which is a combination of ion energy analyzer and mass spectrometer, after calibration with neutral gases. A zero-dimensional rate equation model, sometimes called a global model, is used to understand the source and loss processes of each ion and neutral species in the plasma. The ion density fractions calculated by the model show qualitatively good agreement with the experimental results. Model calculations suggest that ND3+ and ND4+ generation is dominated by electron or D+ exchange reactions of deuterium atomic/molecular ions with ND3. These processes are thought to play an important role in the recombination process of D plasma with ammonia formed in the N2 seeded divertor region. [ABSTRACT FROM AUTHOR]

Published
2018
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8. Progress toward fabrication of graded doped beryllium and CH capsules for the National Ignition Facility

Author

Nikroo, A., primary, Chen, K. C., additional, Hoppe, M. L., additional, Huang, H., additional, Wall, J. R., additional, Xu, H., additional, McElfresh, M. W., additional, Alford, C. S., additional, Cook, R. C., additional, Cooley, J. C., additional, Fields, R., additional, Hackenberg, R., additional, Doerner, R. P., additional, and Baldwin, M., additional

Published
2006
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10. Active core profile and transport modification by application of ion Bernstein wave power in the Princeton Beta Experiment‐Modification

Author

LeBlanc, B., primary, Batha, S., additional, Bell, R., additional, Bernabei, S., additional, Blush, L., additional, de la Luna, E., additional, Doerner, R., additional, Dunlap, J., additional, England, A., additional, Garcia, I., additional, Ignat, D., additional, Isler, R., additional, Jones, S., additional, Kaita, R., additional, Kaye, S., additional, Kugel, H., additional, Levinton, F., additional, Luckhardt, S., additional, Mutoh, T., additional, Okabayashi, M., additional, Ono, M., additional, Paoletti, F., additional, Paul, S., additional, Petravich, G., additional, Post‐Zwicker, A., additional, Sauthoff, N., additional, Schmitz, L., additional, Sesnic, S., additional, Takahashi, H., additional, Talvard, M., additional, Tighe, W., additional, Tynan, G., additional, von Goeler, S., additional, Woskov, P., additional, and Zolfaghari, A., additional

Published
1995
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11. Turbulent adge transport in the Princeton Beta Experiment-Modified high confinement mode.

Author

Tynan, G.R., Schmitz, L., Blush, L., Boedo, J.A., Conn, R.W., Doerner, R., Lehmer, R., and Moyer, R.

Subjects
PLASMA turbulence, NEUTRAL beams, PLASMA confinement
Abstract

Reports on the first probe measurements of edge turbulence and transport in an neutral beam induced high confinement mode. Strong negative radial electric field observed in H-mode; Transient suppression of normalized ion saturation and floating potential fluctuation levels at the low confinement mode to high confinement mode transition.

Published
1994

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