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Topic: Frequency classification of plasmas

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Frequency classification of plasmas

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	iqexpand.com (Site not responding. Last check: 2007-10-08)
		Frequency classification of plasmas [Categories: Plasma physics] Electrical discharges applied in a (Click link for more info and facts about plasma source) plasma source for the generation of...
		Frequency classification of plasmas Electrical discharges applied in a plasma source for the generation of plasmas can be classified by the frequency of the exciting field.
		Informational resource on Frequency classification of plasmas Frequency classification of plasmas Electrical discharges applied in a plasma source for the generation of plasmas can be classified by the...
	frequency_classification_of_plasmas.iqexpand.com (411 words)

	cameroon.ca - Frequency classification of plasmas (Site not responding. Last check: 2007-10-08)
		depends on the frequency or modulation of the current: see the entry on a frequency classification of plasmas.
		Electrical discharges applied in a plasma source for the generation of plasmas can be classified by the frequency of the exciting...
		The plasma excitation frequency spans the electromagnetic spectrum from direct current...
	www.cameroon.ca /Frequency-classification-of-plasmas/reference/fullview/wikipedia/486319 (144 words)

	[No title] (Site not responding. Last check: 2007-10-08)
		These sounders also generate electrostatic waves that produce coherent echoes (called plasma resonances because of their appearance on the data records) that occur near harmonics of the electron cyclotron frequency fce, the electron plasma frequency fpe, and the upper-hybrid frequency fuh, where fuh2 = fpe2 + fce2.
		One, based on eigenmodes of cylindrical electromagnetic plasma oscillations [1], predicts the observed frequency spacing of the observed Dn sequence and also that these resonances would be expected in any magnetized plasma where fpe and fce are comparable [2].
		The main challenge remaining is to derive this fundamental frequency, i.e., for n = 1 which is most prominently observed when fpe/fce » 2 - 4, from kinetic theory (analytically or by numerical simulations) and verify using laboratory experiments.
	image.gsfc.nasa.gov /publication/abstract/2004_benson_etal.txt (315 words)

	Session kWeaP1 - Poster Session: Nonneutral Plasmas.
		The time from plasma formation until initial plasma loss was increased from less than one second initially to several minutes after lowering the base pressure and reducing the resistive growth of the m=1 diocotron mode.
		The measured mode frequencies agree with theory predictions at the 10% level, and the initial damping rates agree within a factor of 2 to 5 with the predictions of a code which calculates (linear) ``spatial Landau damping'' [1] from the measured n_0 (r).
		Theory predicts that the plasma density increases linearly with the mirror ratio, so that the plasma is denser in the high magnetic field region, and that separate plasma populations are trapped in both the high and the low field regions.
	flux.aps.org /meetings/YR97/BAPSDPP97/abs/S4300.html (5105 words)

	Frequency classification of plasmas (Site not responding. Last check: 2007-10-08)
		Electrical discharges applied in a plasma source for the generation of plasmas can be classified by the frequency of the exciting field.
		The quality of the coupling of an exciting field of given frequency to a charged particle depends on the position and shape of the plasma resonance.
		In this case, the main fraction of the power is transferred to the electrons.
	nba.servegame.org /en/Frequency_classification_of_plasmas.htm (98 words)

	Treatment of contact lenses with supercritical fluid - Patent 6180031 (Site not responding. Last check: 2007-10-08)
		A method of producing an optically clear contact lens comprising molding the lens from a monomeric mixture, and treating the molded lens with a supercritical fluid to remove undesired materials from the lens, wherein the lens is a soft hydrogel contact lens.
		A plasma is a complex mixture of atoms and molecules in both ground and excited states which reach a steady state after the discharge has begun.
		As is understood in the field, plasmas can be produced by passing an electrical discharge, usually at radio frequency through a gas at low pressure (0.005 to 5.0 torr).
	www.freepatentsonline.com /6180031.html (4780 words)

	Dr. SOHO's FAQ: The Sun (Site not responding. Last check: 2007-10-08)
		Plasmas are so hot that atoms come apart into charged particles, mostly electrons and protons in the Sun's case.
		These structures contain cool plasma that is seen as a dark feature against the disk and a bright feature when off the limb.
		In the case of SOHO observations of the Sun, the observed wavelength (or frequency) of light that is emitted from hot gas in the Sun's atmosphere changes according to whether the gas is moving towards or away from the detector.
	sohowww.nascom.nasa.gov /explore/faq/sun.html (14630 words)

	Nat' Academies Press, Plasmas and Fluids (1986)
		Plasma physics is divided into three major areas: general plasma physics, fusion plasma confinement and heating, and space and astro- physical plasmas.
		This volume is organized as follows: Chapter 1 is an Introduction and Executive Summary that outlines (a) major findings and recommenda- tions; (b) significant research accomplishments during the past decade and likely areas of future research emphasis; and (c) a brief summary of present funding levels, manpower resources, and institutional in- volvement.
		An important conclusion of this survey is that both plasma physics and fluid physics are scientifically and intellectually well developed, and both areas are broad subdisciplines of physics.
	www.nap.edu /openbook/0309035481/html/R1.html (1107 words)

	p33c in sm04
		While the parameters of plasma in the solar system are relatively well known, important material properties (e.g., coefficients of photoemission, yield of secondary emission, working functions, etc.) of dust grains should be accounted approximately.
		Plasma, particle, wave, and field detectors will take measurements from the edge of the ring plane to observe the result of particle interactions.
		Frequency dependence (19000 vs 825 Hz) was greatest in H and C chondrites.
	www.agu.org /cgi-bin/SFgate/SFgate?&listenv=table&multiple=1&range=1&directget=1&application=sm04&database=/data/epubs/wais/indexes/sm04/sm04&maxhits=200&="P33C" (3566 words)

	Collisionless loss of runaway electrons by magnetic perturbations in a tokamak (Site not responding. Last check: 2007-10-08)
		This is because, for the magnetic fluctuations in the disruptions, the loss of electron confinement due to the breakdown of toroidal momentum conservation overwhelms the runaway electron confinement due to the phase averaging effect of relativistic electrons.
		We assume that the magnetic perturbations generated by the fast plasma shutdown in JT-60U [4] consist of many magnetic islands with comparable widths, and that stochastic magnetic field lines result.
		The number of electrons which reach the plasma edge is counted and from this the average loss rate is evaluated.
	epub.iaea.or.at /fusion/subscribe/39/sep/ms6554TokudS/6554.html (3200 words)

	Pitch perception: A dynamical-systems perspective -- Cartwright et al. 98 (9): 4855 -- Proceedings of the National ...
		its pitch at the frequency of the absent fundamental.
		values of the frequency ratios or that are weakly convergent (10).
		We have investigated these properties in three different systems: the quasiperiodic circle map, a system of coupled electronic oscillators, and a set of ordinary nonlinear differential equations, with the same qualitative results (23) that confirm the theoretical predictions (11).
	www.pnas.org /cgi/content/full/98/9/4855 (2727 words)

	Applied Spectroscopy August 2000 Abstracts (Site not responding. Last check: 2007-10-08)
		The interaction of the ablated copper with the auxiliary glow discharge was studied by monitoring the copper atom emission signal at 368.744 nm.
		The ionization efficiency of the plasma was approximately 0.001, with the majority of the atoms in the plasma ionized.
		The plasma was found to behave linearly with respect to laser power, however nonlinear behavior was observed as the number density was altered.
	www.s-a-s.org /journal/00/August2000_ea2.htm (3813 words)

	wikien.info: Main_Page (Site not responding. Last check: 2007-10-08)
		Frequently, as in the United States, the funds are dedicated or hypothecated to transportation, or even roads, so that the gas tax is considered by many a user fee.
		In the nineteenth century it was frequented by Aleksandr Pushkin, Maxim Gorky and Leo Tolstoy.
		Gastrotrichs Scientific classification Kingdom: Animalia Subkingdom: Metazoa Phylum: Gastrotricha The gastrotrichs are a phylum of microscopic animals, found in fresh water and marine environments.
	www.dizaynworlds.info /browse.php?title=G/GA/GAS (7833 words)

	DoD STTR Program Phase I Selections for FY02
		Using the spectra obtained from within the plasma and in the plasma exhaust, identification and concentration of the active species will be determined.
		Two operational modes will be considered; a steady-state operation, using the high-density plasma of the super-dense glow phase, and a pulsed operation, using the transient formation of a space-charged plasma for ion beam generation.
		Plasma parameters such as the relative concentration of active plasma species in different carrier gases will be measured by mass spectrometry.
	www.dodsbir.net /awardlist/sttr1_02.htm (15287 words)

	Introduction
		A classification of SEE spectral features and the description of their possible generation through parametric decay instability processes was first provided by Stubbe et al.
		The frequency of the BUM peak is approximately given by the empirical formula
		Bud'ko and Vas'kov [1992] and Huang and Kuo [1994] developed theoretical models for a four-wave interaction process involving the decay of the pump wave into a frequency up-shifted upper hybrid wave, a frequency down-shifted electron Bernstein wave and a lower hybrid wave.
	www.agu.org /pubs/toc/gl/gl/gl9807/98GL50568/node1.html (492 words)

	collegebasketball.ca - Plasma source (Site not responding. Last check: 2007-10-08)
		Plasma Source Mass Spectrometry: New Developments and Applications
		At the core of Rush Street is a bustling nightlife nook known as the Viagra Triangle.
		Nigerian computer maker, Omatek Computers, is unloading its 421D 2 plasma television into the market with some of the best features in the global industry for plasma technologies.
	www.collegebasketball.ca /Plasma-source/reference/fullview/wikipedia/62396 (192 words)

	The Helias reactor HSR4/18 (Site not responding. Last check: 2007-10-08)
		In the modelling of a fusion plasma in stellarators, the radiative density limit [16] must be taken into account.
		Neutronics calculations using the MCNP code are in preparation; in particular, the effect of the three dimensional geometry on the breeding ratio and the activation of the structural material need to be investigated.
		The absence of current disruptions in stellarators is one of their major advantages since it eliminates the risk of destroying plasma facing components by sudden mechanical loading.
	epub.iaea.or.at /fusion/subscribe/41/dec/ms7026BeidlC/7026.html (3284 words)

	On-Site Programs
		Special attention will be given to the importance and methods of control of key unique plasma species and their energetic state, their subsequent impact on the coating growth processes, and ultimate film composition and microstructure.
		Extensive applications of plasma processing are accompanied by an intense development of different new plasma sources and methods (e.g., afterglow and remote downstream plasmas, cold atmospheric plasma sources, pulsed plasmas, inductively coupled plasmas [ICP] and helicons, DC and rf hollow cathode plasmas, etc.).
		Plasma treatments are used in the web coating and roll conversion industries to tailor polymer surfaces while preserving their bulk properties.
	www.svc.org /EP/EP_CourseDescription.html (6361 words)

	Frequency-shift keying - Encyclopedia Glossary Meaning Explanation Frequency-shift keying (Site not responding. Last check: 2007-10-08)
		Frequency-shift keying (FSK) is frequency modulation in which the modulating signal shifts the output frequency between predetermined values.
		Note 1: Usually, the instantaneous frequency is shifted between two discrete values termed the "mark frequency" and "space frequency".
		Note 2: Coherent forms of FSK exist in which there is no phase discontinuity in the output signal.
	www.encyclopedia-glossary.com /en/Frequency-shift-keying.html (139 words)

	Space Physics Seminars, Etc.
		In the presence of adjacent layers of unequal perpendicular plasma flow, a common feature during geomagnetic storms, the equilibrium is changed and the parallel current's ability to excite ion-cyclotron waves improves dramatically, as demonstrated by laboratory experiments.
		Of note is that the PEs propagate around the nightside in a narrow channel at the edge of the plasmasphere as Coulomb collisions reduce the fluxes inside of this and convection compresses the flux tubes inward.
		Additionally low frequency electromagnetic energy from lightning penetrates entirely through the ionosphere, interacting with the ionospheric plasmas at all levels.
	www.geophys.washington.edu /Space/seminars.html (2261 words)

	Directed Energy Weapons: Documents, Theses and Technical Reports T-Z (Site not responding. Last check: 2007-10-08)
		Due to classification restrictions, details of this work are relatively unknown outside the military community and its contractors.
		Due to the gigahertz-band frequencies (4 to 20 GHz) involved, HPM has the capability to penetrate not only radio front-ends, but also the most minute shielding penetrations throughout the equipment.
		Beam effects on the local plasma in addition to accelerator produced vehicle effects (e.g., charging) were the responsibility of NRL as outlined herein.
	library.nps.navy.mil /home/bibs/dewtrtz.htm (7108 words)

	Astron. Astrophys. 337, 832-846 (1998)
		To determine the continuum spectral energy distribution (SED) over a frequency range from the radio region up to the optical, we take into account three major radiation processes: thermal free-free radiation (i.e.
		1 displays the absorption efficiencies for the different dust components as a function of frequency.
		This ionization process is important in hot plasmas, where the mean kinetic energy of the electrons is comparable to the ionization potentials of the ions.
	aa.springer.de /papers/8337003/2300832/sc2.htm (1023 words)

	Specialised Courses in Physics - University of Tromsø (Site not responding. Last check: 2007-10-08)
		This is an advanced level course in plasma physics with emphasis on laboratory plasmas and experimental techniques.
		The contents of the course: Bayes statistics, supervised and unsupervised classification, parametric and non-parametric estimation, description and analysis of an objects structural properties, and the most common neural networks for supervised and unsupervised classification.
		This course is adapted for graduate students in plasma physics and builds on the intermediate subject group for the plasma physics graduate program.
	www.matnat.uit.no /eng/Studies/physics/physics_special.htm (2488 words)

	Annual Reviews -- ISM
		Questions concerning the detectability of radio frequency transitions of a molecule in interstellar space are considered along with estimates of molecular projected densities, envelopes around far infrared sources and H II regions, and protostellar and stellar sources.
		A classification scheme for describing the molecular morphology of galaxies based on a differentiation between central regions and disks is presented.
		Relative SN frequencies in different types of galaxies and the transformation of such frequencies into absolute ones are discussed.
	cfa-www.harvard.edu /~agoodman/araa.html (7195 words)

	Laser Safety Training Guide
		All equipment should be installed in accordance with OSHA and the National Electrical Code.
		Collateral radiation, i.e., radiation other than that associated with the primary laser beam, may be produced by system components such as power supplies, discharge lamps and plasma tubes.
		) are focused on a target, a plasma is generated which may also emit collateral radiation.
	web.princeton.edu /sites/ehs/laserguide/sec2.htm (3056 words)

	NSC Project 2005082 (Site not responding. Last check: 2007-10-08)
		This proposal aims at continuation of the previous project (SAC 021-03-21nh and 021-03-21), which was started one year ago with late Professor Anders Bondeson as the principle applicant and Associate Professor Yueqiang Liu as the co-applicant.
		In this project, we will carry out the research in Computational Magnetohydrodynamics for fusion plasmas, where we have a long term record of international frontline research.
		We pursue the studies of the so-called resistive wall mode stabilization by plasma rotation in a fusion device (tokamak), or by active feedback control.
	www.nsc.liu.se /projects/activeprojects/project_2005082.html (174 words)

	Coupling (physics) (Site not responding. Last check: 2007-10-08)
		Coupling is also important in physics for the generation of plasmas.
		In electrical discharges, the coupling of an exciting field and a medium creates plasmas.
		The quality of the coupling of an exciting field of given frequency to a charged particle depends on resonance.
	www.worldhistory.com /wiki/C/Coupling-(physics).htm (193 words)

	cfny.ca - Plasma Cutting (Site not responding. Last check: 2007-10-08)
		Plasma cutters at discount prices from Automotive Service Equipment.
		Plasma display panels dominate the market for the large, thin TVs that are...
		giant projection screens and one giant plasma screen where they are integrated with numerous high-end visual effects.
	www.cfny.ca /Plasma-Cutting/reference/search (311 words)

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