Zobrazeno 1 - 10
of 58
pro vyhledávání: '"R. A. Breun"'
Autor:
Richard Majeski, T. Tanaka, Noah Hershkowitz, D. B. Brouchous, R. A. Breun, D. Roberts, M. Vukovic, R. Hatakeyama, P. Proberts, Y. J. Wen
Publikováno v:
Physics of plasmas. 4(8):2947-2954
A comparison of phenomenological features of plasmas is made with a special emphasis on radio-frequency induced transport, which are maintained when a set of two closely spaced dual half-turn antennas in a central cell of the Phaedrus-B axisymmetric
Autor:
R. A. Breun, M. Sarfaty, Noah Hershkowitz, K.M. Nagpal, Tyrone L. Vincent, C. Baum, Pramod P. Khargonekar, Juda Leon Shohet
Publikováno v:
Plasmas and Polymers. 2:229-244
An in situ single point two-color laser interferometer is used to monitor in real-time the thickness of thin transparent films during processing. The instantaneous change of film thickness is determined by comparing the measured laser reflection inte
Autor:
Noah Hershkowitz, R. A. Breun
Publikováno v:
Review of Scientific Instruments. 68:880-885
Plasma processing diagnostics play two different roles—characterization and control. The goal of plasma characterization is to establish connections of data with external parameters and to verify models. The goal of control diagnostics is to make n
Publikováno v:
Physics of Plasmas. 3:2197-2202
Etching of SiO2 with CF4 in three types of high density–low pressure (5×1011 cm−3, 1–10 mTorr) etch tools: electron cyclotron resonance (ECR), inductively coupled (ICP), and helicon (HRF) is described. Although the physical processes that prod
Autor:
M. Vukovic, Richard Majeski, R. Durst, R.J. Fonck, Misha Kishinevsky, D. Diebold, C. Litwin, R. A. Breun, P. H. Probert, Thomas Intrator, Noah Hershkowitz, Artur G. Elfimov, P. D. Nonn, S. Wukitch, G.R. Winz, D. Brouchous, Mark Doczy
Publikováno v:
Physics of Plasmas. 3:1331-1339
In the Phaedrus‐T tokamak [R. A. Breun et al., Fusion Technol. 19, 1327 (1991)], Alfven waves are indirectly driven by a fast wave antenna array. Small fractions of minority ions are shown to have a large effect on the Alfven spectrum, as measured
Autor:
Noah Hershkowitz, R. A. Breun, C. Litwin, M. Harper, D. Brouchous, Thomas Intrator, S. Wukitch, M. Vukovic
Publikováno v:
Physics of Plasmas. 2:4551-4554
The loop voltage response in the low‐frequency current drive experiments is analyzed in order to extract information about the current drive profile and efficiency.
Publikováno v:
Plasma Sources Science and Technology. 4:337-344
Helicon waves were excited by a Nagoya type III antenna in a steady state argon magnetized plasma column with DC magnetic field B0=400-500 G, electron density 1012-1013 cm-3 and neutral species pressure about 20 mTorr. Wavelength measurements made wi
Autor:
M. Kishinevsky, R. A. Breun, D. Diebold, S. Wukitch, Artour G Elfimov, M. Doczy, D. Edgell, Thomas Intrator, P. D. Nonn, C. Litwin, P. H. Probert, Noah Hershkowitz, G.R. Winz, D. Brouchous, M. Vukovic, P. E. Moroz
Publikováno v:
Physics of Plasmas. 2:2263-2271
The first experimental evidence of Alfven Wave Current Drive (AWCD) in a tokamak is shown. In a low‐density experiment, an estimated 20–35 kA out of 65 kA total current, or 30%–55% of the total current has been driven. The estimated efficiency
Publikováno v:
Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films. 13:865-870
Computer modeling of Nagoya Type III and helical antennas, used to excite helicon waves, has been carried out with the code ANTENA. The code considers a cylindrical plasma with an arbitrary radial density and temperature profile and realistic antenna
Autor:
J. R. Conrad, Matthew Goeckner, R. A. Breun, N. C. Horswill, William Nicholas Guy Hitchon, Eric R. Keiter, M. M. Shamim, T. E. Sheridan, R.P. Fetherston
Publikováno v:
Physical Review E. 51:3760-3763