Anomalous plasma heating induced by modulation of the current-density profile =

Anomale verhitting van een plasma opgewekt door vervorming van het stroomdichtheidsprofiel by Nicolaas Joost Lopes Cardozo

Publisher: Rijksuniversiteit te Utrecht] in [Utrecht

Written in English
Published: Pages: 110 Downloads: 170
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Subjects:

  • Plasma heating.,
  • Plasma confinement.,
  • Plasma diagnostics.

Edition Notes

Other titlesAnomale verhitting van een plasma opgewekt door vervorming van het stroomdichtheidsprofiel.
Statementdoor Nicolaas Joost Lopes Cardozo.
Classifications
LC ClassificationsQC718.5.H5 L67 1985
The Physical Object
Paginationix, 110 p. :
Number of Pages110
ID Numbers
Open LibraryOL2283777M
LC Control Number86149548

  The only book on the market that emphasizes machine design beyond the basic principles of AC and DC machine behavior AC electrical machine design is a key skill set for developing competitive electric motors and generators for applications in industry, aerospace, and defense. This book presents a thorough treatment of AC machine design, starting from basic Author: Thomas A. Lipo. SNAPOVER: ANOMALOUS PLASMA CURRENT COLLECTION BY POSITIVELY BIASED CONDUCTORS. WHEN SURROUNDED BY A DIELECTRIC. C.D. Thomson and J.R. Dennison. Utah State University, Logan, UT. ABSTRACT. Over the last decade, high-powered spacecraft have been designed that will operate at voltages greater than V. At theseCited by: 2. SNAPOVER: ANOMALOUS PLASMA CURRENT COLLECTION BY POSITIVELY BIASED CONDUCTORS W HEN SURROUNDED BY A DIELECTRIC C.D. Thomson and J.R. Dennison Utah State University, Logan, UT ABSTRACT Over the last decade, high-powered spacecraft have been designed that will operate at voltages greater than V. At t hese volt ages. Under certain conditions, with particles of diameter comparable to the wavelength of light, the phenomenon of a negative indirect photophoresis occurs, due to the unequal heat generation on the laser irradiation between the back and front sides of particles, this produces a temperature gradient in the medium around.

  In this article, we review the prototypical phase-transition material-VO2, which undergoes structure and conductivity changes simultaneously. The recent progresses in the transition mechanism are Cited by: Molybdenum disulfide (MoS2) of single- and few-layer thickness was exfoliated on SiO2/Si substrate and characterized by Raman spectroscopy. The number of S−Mo−S layers of the samples was independently determined by contact-mode atomic force microscopy. Two Raman modes, E12g and A1g, exhibited sensitive thickness dependence, with the frequency of the Cited by:   Search the leading research in optics and photonics applied research from SPIE journals, conference proceedings and presentations, and eBooks. Princeton Plasma Physics Laboratory, P.O. Box Princeton, NJ GPS: Stellarator Road, Princeton, NJ,

KEYWORDS: Ultrafast phenomena, Femtosecond phenomena, Photons, Physics, Terahertz radiation, Phonons, Excitons, Picosecond phenomena, Polaritons, Plasma Read Abstract + Many-body correlation effects in complex quantum systems often lead to phase transitions that bear great technological potential. to create a plasma with a striped density modulation. After sufficiently long time, the waves completely damp, heating the plasma and reducing Γ i. Electrons provide a uniform screening background for the ions, with screening parameter κ ≡ a=λ ¼ – in these experiments, for Wigner-Seitz radius a ¼ð3=4πnÞ1=3. The plasma density.   Lattice Energy LLC - Electroweak neutron production explains anomalous CNO elements in atmospheres of white dwarf stars - Feb 8 Lattice Energy LLC - Electroweak neutron production explains anomalous CNO elements in atmospheres of white dwarf stars - Feb 8 Typical current density was 20mA/cm2. Here, you see the metal particle. plasma density and electron temperature in the plasma center (r = 0, z = 5 cm) were cm-3 and 6 e V, respectively, independent of driving frequency. These same parameters in I cm) were about the plasma heating zone (r = 4 cm, z = cm 3 and 7 e V, respectively. From magnetic probe measurements we found n in the skin layer.

Anomalous plasma heating induced by modulation of the current-density profile = by Nicolaas Joost Lopes Cardozo Download PDF EPUB FB2

The high-voltage pulse results in a modulation of the current-density profile: the (normally already oeaked) profile sharpens, the current concentrates in the centre of the plasma column. This is a non-equi­ librium situation.

It relaxes to the normal current distribution within - 2 : N. Lopes Cardozo. The delay is puzzling since the energy confinement time of the plasma is only msec.

Analysis of X-ray measurements suggests that magnetic energy is converted into heat. Extra current induced on top of the running plasma current spreads over the entire plasma.

Anomalous plasma heating induced by modulation of the current-density profile () Pagina-navigatie: Main; Save publication.

Save as MODS; Export to Mendeley; Save as EndNote; Export to RefWorks; Title: Anomalous plasma heating induced by modulation of the current-density profile: Author: N.J.

Lopes Cardozo, Date issued: Download PDF: Sorry, we are unable to provide the full text but you may find it at the following location(s): (external link); Author: N.J. Lopes Cardozo. The initial heating of the coronal plasma requires anomalous resistivity because Joule heating with classical resistivity is unable to explain the observed densities, temperatures, and rapid timescales in flare plasmas.

Other forms of coronal flare plasma heating, such as slow shocks, electron beams, proton beams. We demonstrate the effect of substrates on the temperature change induced by the anomalous Ettingshausen effect in ferromagnetic thin films. The experimental results show that, in comparison with conventional experiments using bulk substrates, the temperature modulation due to the anomalous Ettingshausen effect in Ni films can be enhanced by more than an Author: Rajkumar Modak, Ken-ichi Uchida, Ken-ichi Uchida.

In studies with three-frequency heating when compared to two-frequency heating, the beam intensity for O7+ increased from to eμA, Kr23+. The energy density of the ion-sound turbulence in the saturated state, the ion and electron heating rates, as well as the effective collision frequency arising from the anomalous absorption of the.

Due to the energy spread of the beam, the proton current varies from ∼1 kA at 1 mm from the plasma source to ∼ A at 1 cm. Due to the beam divergence of ∼10° half-angle, the beam current density also decreases rapidly with the distance from the target (1 MA/cm 2 at 1 mm and 1 kA/cm 2 at 1 cm).

The proton beam is then propagated through a supersonic jet of He Cited by: 3. To test Oscillating Field Current Drive, two 1 mva hz oscillators have been installed in the toroidal and poloidal magnetic field circuits of the MST reversed field pinch.

These oscillators add an alternating component to the magnetic field which affects the current profile and magnetic tearing fluctuations. The amplitudes of the m=1 and m=0 modes exhibit modulation at the.

The dynamics of the heating of a plasma by short-duration laser pulses is considered in the spherical case on the assumption that the laser radiation frequency exceeds the plasma frequency.

The range of validity of the theoretical model employed corresponds to ultrashort pulses of less than 10 –10 sec duration. The numerical results for these three models show that the transport mechanism is superdiffusive with an anomalous diffusion exponent in the range (, ).

Introduction Purely diffusive transport processes cannot explain a variety of transport experiments in magnetically confined plasmas. The temperature modulation in the U-shaped FePt induced by the J c flow is observed for the AEE measurement using the LIT technique (figure 1(a)) as in the previous work while the ANE voltage appearing between the terminals of U-shaped FePt is measured under temperature gradient generated by the heater line built into the device (figure 1(b.

Investigations on the ambipolar diffusion of an electron-hole plasma transverse to a magnetic field have been carried out in InSb. A plasma layer, produced at the surface of the sample by a short laser pulse, was moved through the sample in crossed electric and magnetic fields by the Lorentz force.

From the broadening of the plasma layer we found at 80K an Cited by: In optics, one important and familiar consequence of dispersion is the change in the angle of refraction of different colors of light, as seen in the spectrum produced by a dispersive prism and in chromatic aberration of lenses.

Design of compound achromatic lenses, in which chromatic aberration is largely cancelled. To explore the character of transport in a plasma turbulence model with avalanche transport, the motion of tracer particles has been followed.

Both the time evolution of the moments of the distribution function of the tracer particle radial positions, 〈|r(t)−r(0)|n〉, and their finite scale Lyapunov number are used to determine the anomalous diffusion exponent, ν. The numerical Cited by: The magnitude of the ion temperature oscillation varies depending on a not well understood set of control parameters (e.g., loop voltage amplitude, current, density, etc.), causing poor reproducibility in the anomalous heating mechanism.

An increase in the oscillator power and lowered frequency are planned. Numerical simulation is made of the transient heat conduction during local heating in a model coronal magnetic loop with an axial electric current. It is assumed that a segment near the top of the normal coronal loop is heated to above K by a sufficiently small heat input as compared with the total flare energy.

A hump appears in the velocity distribution Cited by: 4. is often anomalous; second, single probe theory, which requires current density to 'vanish' in the far plasma (effectively coming from large chamber walls in a laboratory), may not apply because distances to near walls are short [19].

Here, we further consider electron cooling and heating processes for the retarding range. TAE-induced energetic ion transport and loss In LHD, anomalous radial transport of co-going beam ions toward the outboard side of the torus caused by TAEs has been recognized from rapid increases in CX fast neutrals measured FIG.

a) Profiles of T e, n e for the discharge shown in Fig. b) Rotational transform profile. c) Shear Alfvén. PHYSICAL REVIEW A 83, () Density and temperature scaling of disorder-induced heating in ultracold plasmas S. Bergeson, 1A.

Denning, M. Lyon,1 and F. Robicheaux2 1Department of Physics and Astronomy, Brigham Young University, Provo, UtahUSA 2Department of Physics, Auburn University, Auburn, AlabamaUSA (Received 22. Aspects in Anomalous Transport in Plasmas is the first book to systematically consider anomalous plasma transport theory and provides a unification of the many theoretical models by emphasizing interrelations between seemingly different methodologies.

It is not intended as a catalogue of the vast number of plasma instabilities leading to Format: Hardcover. Anomalous plasma resistivity due to ion acoustic turbulence: J. Dawson: Chu, Cheng. Investigations of anomalous processes associated with the lower hybrid waves: J. Dawson: Sauthoff, Ned.

The structure of fluctuations in the trapped electron regime of the FM-1 Spherator: J. Schmidt: Johnston, Russell S. Classical induced scattering of.

Anomalous cathode reaction forces developed by field emission in vacuum-arc discharges had been well known to physicists since the 's, and had led Dr.

Harold Aspden of Southampton University, UK, in to enunciate his principle of an anomalous energy transfer in plasma between electrons and heavy ions, resulting in a vacuum-induced.

44th IOP Plasma Physics Conference Programme and Abstract Book. Contents. P4 Nonlinear self-consistent kinetic simulations of the anomalous Doppler instability of suprathermal electron populations in fusion plasmas for example for cases where the current density is parallel to the magnetic field (force -free current.

The photo-induced density of free-electron plasma onto the 1-mm-thick slab of n-type silicon is spatially reconfigurable, thereby producing permittivity modifications in a thin film at the surface Cited by:   Professor of Physics & Head of Department Department of Physics University College Ireland IRIS Research profile Tel: (+) 23 27 Fax: (+) 69 49 Email: [email protected] Degrees Ph.D.

in Physics, Trinity College, University of Dublin, Ireland, in Experimental Physics and Mathematical Science, National University of Ireland, Univ. Magnonics, an emerging research field, aims to control and manipulate spin waves in magnetic materials and structures.

However, the current understanding of spin waves remains quite limited. This review attempts to provide an overview of the anomalous behaviors of spin waves in various types of magnetic materials observed thus far by inelastic light scattering by: 1.

@article{osti_, title = {Modulated heat pulse propagation and partial transport barriers in chaotic magnetic fields}, author = {Castillo-Negrete, Diego del and Blazevski, Daniel}, abstractNote = {Direct numerical simulations of the time dependent parallel heat transport equation modeling heat pulses driven by power modulation in three-dimensional chaotic.

The U.S. Department of Energy's Office of Scientific and Technical Information. Blaunstein N., Evolution of a stratified plasma structure induced by local heating of the ionosphere, Journal of Atmospheric and Solar-Terrestrial Physics, 59, 3,(). [45] Blaunstein N., Changes of the electron concentration profile during local heating of the ionospheric plasma, Journal of Atmospheric and Terrestrial Physics, The free electron plasma is induced by a CW pump beam at nm delivered by a GaAlAs laser diode (Hitachi HLG) on a bare Silicon wafer.

The latter is a n -doped high resistivity (30 kΩ∙cm) float zone silicon (HRFZ-Si) produced by Tydex Company, with a diameter of mm and nominal thickness of 1 mm (transmittance ≈55% to the THz Cited by: Characterizing the fibers.

The first fibers created in the s were uncladded fibers [1,2,3].The core-and-cladding design appeared only in the s [4,27,28,29,30].The simplest form of this kind of fibers is called step-index fiber (upper part of Fig.

) which consists of a central glass core of refractive index greater than that of the surrounding material called .