Laboratory Experiments on the interaction of electromagnetic waves at plasma gradients Walter Gekelman Pat Pribyl Yuhou Wang* * Left for position at LAM.

Slides:

Advertisements

Similar presentations

Waves and the Electromagnetic Spectrum

Advertisements

The following shows the existence of oscillating magnetic and electric fields in an electromagnetic wave The detection of the fields relies on the two.

Xie, JinLin & LMPD group CAS KEY LABORATORY OF BASIC PLASMA PHYSICS

NSTX Reflectometer Measurements of RF Waves in the Scrape-off Layer in Front of the HHFW Antenna Array J. B. Wilgen, G. R. Hanson, P. M. Ryan, D. W. Swain.

Microwave Tubes.

Christina De Bianchi Howard University Advisors: Ellen Zweibel & Jay Anderson Summer REU 2009 University of Wisconsin-Madison Madison, WI.

Chapter 4 Waves in Plasmas 4.1 Representation of Waves 4.2 Group velocity 4.3 Plasma Oscillations 4.4 Electron Plasma Waves 4.5 Sound Waves 4.6 Ion Waves.

Which describes a variation of wave frequency ω(t) in a geometric-optic approximation [4]. Here n(ω) is the refractive index of the medium, is the vector.

6. Wave Phenomena 6.1 General Wave Properties(1) Following Schunk’s notation, we use index 1 to indicate the electric and magnetic wave fields, E 1 and.

Modeling Generation and Nonlinear Evolution of VLF Waves for Space Applications W.A. Scales Center of Space Science and Engineering Research Virginia Tech.

Sub-THz Component of Large Solar Flares Emily Ulanski December 9, 2008 Plasma Physics and Magnetohydrodynamics.

Resolute Bay, Nunavut Auroral Radio Emission Sources: Possible Sources of Radar Backscatter? James LaBelle Department of Physics and Astronomy Dartmouth.

Antenna in Plasma (AIP) Code Timothy W. Chevalier Umran S. Inan Timothy F. Bell March 4, 2008.

The NMR spectrometer Magnet Probe Coils Transmitters

As the first half wavelength of the approaching wavefront reaches the atom shown, the E -field 1) pushes the electron cloud up, the nucleus down. 2) pushes.

Whistler Wave Launch and Diamagnetic Plasma Formation in Laboratory Experiments Bill H. Quon, Microwave Plasma Applications 252 S. Poplar Ave # 403 Brea,

5. Simplified Transport Equations We want to derive two fundamental transport properties, diffusion and viscosity. Unable to handle the 13-moment system.

Flows and Instabilities Associated with an Extremely Narrow Current Sheet Presented by Stephen Vincena April 20, 2004 University of Maryland Second Workshop.

Nonresonant pitch angle scattering of electrons and breakdown of adiabatic invariance: Modeling Surja Sharma, Alexey Karavaev, Erin Lynch, Nail Gumerov,

PARS Workshop on Novel Methods of Excitation of ULF/ELF/VLF to Improve Efficiency and Availability" November 3 - 6, 2002 Sponsored by Air Force Research.

Pulse compression ABP Atoms, Beams & Plasmas Compression of Frequency-Modulated Pulses using Helically Corrugated Waveguide S.V. Samsonov, S.V. Mishakin,

Electricity, Electronics And Ham Radio “Kopertroniks” By Nick Guydosh 4/12/07.

Electromagnetic Waves. Electromagnetic Wave A transverse wave that transfers electrical and magnetic energy. Consists of vibrating electric and magnetic.

Nonlinear VLF Wave Physics in the Radiation Belts Chris Crabtree Guru Ganguli Erik Tejero Naval Research Laboratory Leonid Rudakov Icarus Research Inc.

1 Association Euratom-Cea TORE SUPRA Tore Supra “Fast Particles” Experiments LH SOL Generated Fast Particles Meeting Association Euratom IPP.CR, Prague.

Physics and Measurements of Stimulated Electromagnetic Emissions Paul A. Bernhardt, Stan Briczinski Plasma Physics Division Naval Research Laboratory.

Light and Matter Tim Freegarde School of Physics & Astronomy University of Southampton Classical electrodynamics.

APHY201 10/24/ Maxwell’s Equations   1865 – James Maxwell unifies electricity and magnetism and shows that their fields move through space.

N. Yugami, Utsunomiya University, Japan Generation of Short Electromagnetic Wave via Laser Plasma Interaction Experiments US-Japan Workshop on Heavy Ion.

1 Chapter 6 WAVES Dr. Babar Ali. 2 CHAPTER OUTLINE  Wave Concept Wave Concept  Wave Properties Wave Properties  Wave Speed Wave Speed  Wave Types.

STEREO: Beyond 3D. Why the Sun? The sun provides energy for the development of life on our planet. Our orbit looks calm and peaceful, but there is nothing.

TE/TM are the configuration of E and H fields

Travelling Wave Tube For Broadband amplifier helix TWTs (proposed by Pierce and others in 1946 ) are widely used For High average power purposes the.

Electromagnetic Waves and Their Propagation Through the Atmosphere

ASIPP Long pulse and high power LHCD plasmas on HT-7 Xu Qiang.

XVII CLUSTER Workshop, Uppsala, 14 May 2009 Fan and horseshoe instabilities -relation to the low frequency waves registered by Cluster in the polar cusp.

L-band (1.3 GHz) 5-Cell SW Cavity High Power Test Results Faya Wang, Chris Adolphsen SLAC National Accelerator Laboratory

A Microwave Reflectometry Based On Amplitude Modulation onHT-7 Tokamak B.L.Ling, Institute of Plasma Physics, Chinese Academy of Sciences, P.O.Box 1126,

MOODLE 3 ELECTROMAGNETIC SPECTRUM. Electromagnetic waves are formed when an electric field couples with a magnetic field. EM waves are transverse waves.

Electromagnetic Waves

Observations of electrons in the Intense Pulse Neutron Source (IPNS) Rapid Cycling Synchrotron (RCS) J. C. Dooling, F. R. Brumwell, W. S. Czyz, K.C. Harkay,

Laboratory Study of Spiky Potential Structures Associated with Multi- Harmonic EIC Waves Robert L. Merlino and Su-Hyun Kim University of Iowa Guru Ganguli.

DEVELOPMENT OF ION ENERGY ANGULAR DISTRIBUTION THROUGH THE PRE-SHEATH AND SHEATH IN DUAL-FREQUENCY CAPACITIVELY COUPLED PLASMAS* Yiting Zhanga, Nathaniel.

Measurements of the X-ray/pump laser pulse timing Valery Dolgashev, David Fritz, Yiping Feng, Gordon Bowden SLAC 48th ICFA Advanced Beam Dynamics Workshop.

Multiscale Turbulence excited by a pulsed current sheet Walter Gekelman,Stephen Vincena, Patrick Pribyl, Brett Jacobs, Eric Lawrence (UCLA Department of.

1 LHCD Properties with a New Lower Hybrid Wave Antenna on HT-7 Tokamak Wei Wei,Guangli Kuang,Bojiang Ding,Weici Shen and HT-7 Team Institute of Plasma.

1 ESS200C Pulsations and Waves Lecture Magnetic Pulsations The field lines of the Earth vibrate at different frequencies. The energy for these vibrations.

RPWI Team Meeting, Sep. 2010, Roma Magnetic Loop Antenna (MLA) Scientific Objectives A. Marchaudon, V. Krasnoselskikh, T. Dudok de Wit, C. Cavoit,

47th Annual Meeting of the Division of Plasma Physics, October 24-28, 2005, Denver, Colorado ECE spectrum of HSX plasma at 0.5 T K.M.Likin, H.J.Lu, D.T.Anderson,

Application of Advanced Spectral Techniques to EMFISIS Burst Mode Waveform Data Chris Crabtree Erik Tejero CL Enloe Guru Ganguli Naval Research Laboratory.

1) For equivalent ECRH power, off-axis heating results in lower stored energy and lower core temperature 2) Plasma flow is significantly reduced with off-axis.

Measurements of Magnetic Fluctuations in HSX S. Oh, A.F. Almagri, D.T. Anderson, C. Deng, C. Lechte, K.M. Likin, J.N. Talmadge, J. Schmitt HSX Plasma Laboratory,

Numerical simulations of wave/particle interactions in inhomogeneous auroral plasmas Vincent Génot (IRAP/UPS/CNRS, Toulouse) F. Mottez (LUTH/CNRS, Meudon)

Nonlinear plasma-wave interactions in ion cyclotron range of frequency N Xiang, C. Y Gan, J. L. Chen, D. Zhou Institute of plasma phsycis, CAS, Hefei J.

The Role of VLF Transmitters in Limiting the Earthward Penetration of Ultra-Relativistic Electrons in the Radiation Belts J. C. Foster, D. N. Baker, P.J.

Introduction to Plasma Physics and Plasma-based Acceleration

How does a klystron work? TE-MPE Section Meeting Karolina Kulesz

The Earth is {image} meters from the sun

Electromagnetic Radiation

Simulations of Ionospheric Turbulence near the Upper Hybrid Layer

25.1 The Electromagnetic Spectrum

25.1 The Electromagnetic Spectrum

Electromagnetic Waves

Two-fluid Collisionless MHD

J.R. Wilson, R.J. Goldston, J.C. Hosea ReNew Theme III Workshop

A. Wave speed B. Waveform C. Wavelength D. Wave spread

Survey of the 2.45GHz microwave field

Two-fluid Collisionless MHD

Near-Field Physics of Lower-Hybrid Wave Coupling to Long-Pulse, High Temperature Plasmas in Tore Supra A dynamic Stark effect measurement performed near.

Presentation transcript:

Laboratory Experiments on the interaction of electromagnetic waves at plasma gradients Walter Gekelman Pat Pribyl Yuhou Wang* * Left for position at LAM research 1

UCLA experiments: Plasma modification and wave generation by cross-field high power rf pulses Intense X-band microwave pulses (200 kW, near f pe or f uh ) are delivered into a magnetized plasma column transverse to Bo. Heating energy is found to be deposited in a narrow layer determined by plasma density and background magnetic field. Generation of low frequency waves from 9.6 GHz microwave bursts 2

Electron Heating MEASURED WITH A STEP- SWEPT LANGMUIR PROBE Single Pulse Multiple pulses f e (E) 3

Lower hybrid waves are generated Electrostatic waves measured with an electric dipole probe note : f ce = 1.1 GHz f LH = 26 MHz 4

Wave frequency f ci = 122 kHz dz = 3.84 m Wave Components 5

Are they Alfvén waves? Dispersion measured Wave amplitude proportional to input microwave power 6

DURIP proposal submitted Intent : To purchase microwave hardware ( arbitrary waveform generator, high power amplifier, mixers…) to enable launching tailored microwave waveforms (swept amplitude/frequency) And measure E,B with a hetrodyne system 7

8

9