Helicon wave
WebThe pseudosurface wave at the first harmonic becomes the helicon wave at relatively high density, n ∼ 2.2 x 1011 cm-3, and high B field, oc/o > 3.3, while the helicon wave changed to the pseudosurface wave at the second harmonic when o c/o < 3.0. Publication: Ph.D. Thesis Pub Date: 2000 Bibcode: 2000PhDT.......213L full text sources Publisher WebThe new “comb-line” traveling-wave antenna, paired with a 1-MW, 476-MHz microwave source and transmission lines, allows physicists to inject very high-powered “helicon” …
Helicon wave
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WebThree distinct modes of operation of the helicon plasma source, capacitive, inductive, and helicon-wave, are identified by the structure of the plasma-wave-fields. Results are reported for a double-half-turn antenna, which is believed to be the first reporting for such an antenna structure in application to helicon-wave plasma sources. Web15 jun. 2016 · Helicon plasma is a high-density and low-temperature plasma generated by the electromagnetic (helicon) wave excited in a plasma. Since it can be operated in a wide range of external parameters, it is useful for various applications such as plasma processing, electric thrusters, and fundamental plasma research. 1 1. F. F.
WebHelicon and Alfvén wave propagation in non-magnetic semiconductors and semi-metals: Active and passive waves A. C. Baynham, A. Boardman Physics 1970 Abstract It was pointed out in 1960 that metals and semiconductors can support low frequency electromagnetic excitations in the presence of a magnetic field. We now feel that it is an … Web1 feb. 2024 · Helicon waves have been recently proposed as an off-axis current drive actuator due to their expected high current drive efficiency in the mid-radius region in …
WebHELICON WAVE A standing helicon wave has been excited by applying a transverse rf field to a cylindrical plasma immersed in a steady axial magnetic field. The predictions of … Web26 nov. 2024 · This is where the helicon plasma cell comes in. A helicon wave is a low frequency electromagnetic wave capable of generating very high-density plasmas, like …
Web8 mrt. 2024 · 2. Helicon wave current drive theory and modeling on DIII-D Heliconwavesareveryhigh(ω∼30−50ω ci)ioncyclotron harmonicfast waves. Thetheory of …
Web26 jun. 2014 · Abstract Fast waves at frequencies far above the ion cyclotron frequency and approaching the lower hybrid frequency (also called “helicons” or “whistlers”) have application to off-axis current drive in tokamaks with high electron beta. kevin bullard whiteville ncWebAnalysis of recent experiments have depended on a simple treatment of helicon waves in which the electron mass meis taken to be zero,3–7so that d[v/v. c50. At low magnetic … kevin bunge chicagoWebHelicon waves are magnetized plasma waves, similar to whistler waves in Earth's ionosphere, that are used to create high-density laboratory plasmas. We demonstrate that the discharge... kevin burgess faithtechWebHowever, skin depth depends on an inverse proportionality to the square root of angular frequency. Thus a low frequency electromagnetic wave may be able to overcome the skin depth problem, and thereby propagate throughout the material. A helicon discharge is an excitation of plasma by helicon waves induced through radio frequency heating. kevin bullis football coachWeb18 jan. 2024 · As previously mentioned, helicon wave was also detected in nearly uniform and unbounded plasmas, where excited wave amplitude is determined by the antenna … kevin bullis whitewater wiWebHelicon waves have been recently proposed as an off-axis current drive actuator due to their expected high current drive efficiency in the mid-radius region in high beta … kevin bumbernickWebHelicon wave excitation with rotating antenna fields David G Miljakyand Francis F Chen University of California, Los Angeles, CA 90095-1594, USA Received 30 July 1997, in … is it wrong to pick up dungeon season 4 ep 10