Thomas B. Leyser


HAARP beam carrying OAM
Polyphony, Paul Klee
Polyphony, Paul Klee
Polyphony, Paul Klee
Polyphony, Paul Klee
Polyphony, Paul Klee
Polyphony, Paul Klee
Polyphony, Paul Klee
Recent and upcoming publications 

E. Nordblad and T. B. Leyser, Ray Tracing Analysis of L Mode Pumping of the Iono- sphere, with Implications for the Magnetic Zenith Effect, Ann. Geophys., 28, 1749–1759, doi: 10.5194/angeo-28-1749-2010 (2010).

Ya. N. Istomin and T. B. Leyser, Kinetics of density striations excited by powerful elec- tromagnetic waves in the ionosphere, Phys. Plasmas, 17, 032903, doi: 10.1063/1.3356085 (2010).

T. B. Leyser and E. Nordblad, Self-focused radio frequency L wave pumping of localized upper hybrid oscillations in high-latitude ionospheric plasma, Geophys. Res. Lett., 36:L24105 (4 pp), doi:10.1029/2009GL041438 (2009).

B. Gustavsson, R. Newsome, T. B. Leyser, M. J. Kosch, L. Norin, M.
McCarrick, T. Pedersen, B. J. Watkins, First Observations of X-mode Suppression of O-mode HF Enhancements at 6300 Å, Geophys. Res. Lett., 36:L20102 (2009).

H. Löfås, N. Ivchenko, B. Gustavsson, T. B. Leyser, and M. T. Rietveld, F-region electron heating by X-mode radiowaves in underdense conditions, Ann. Geophys., 27, 2585–2592 (2009).

T. B. Leyser, L. Norin, M. McCarrick, T. R. Pedersen, and B. Gustavsson, Radio pumping of ionospheric plasma with orbital angular momentum, Phys. Rev. Lett., 102, 065004, doi: 10.1103/PhysRevLett.102.065004 (2009).

L. Norin, T. B. Leyser, E. Nordblad, and B. Thidé, and M. McCarrick, Unprecedentedly strong and narrow electromagnetic emissions stimulated by
high-frequency radio waves in the ionosphere, Phys. Rev. Lett., 102, 065003, doi: 10.1103/PhysRevLett.102.065003  (2009).

J. O. Hall, Ya. N. Istomin, and T. B. Leyser, Electromagnetic coupling of localized upper hybrid oscillations in a system of density depletions, Phys. Plasmas, 16, 012902, doi: 10.1063/1.3068744 (2009).

T. B. Leyser and A. Y. Wong, Powerful electromagnetic waves for active environmental research in geospace, Rev. Geophys., 47, RG1001, doi:10.1029/2007RG000235 (2009).

L. Norin, S. M. Grach, T. B. Leyser, B. Thidé, E. N. Sergeev, and M. Berlin, Ionospheric plasma density irregularities measured by stimulated electromagnetic emission, J. Geophys. Res., 113:A09314, doi:10.1029/2008JA013338 (2008).

L. Norin, S. M. Grach, B. Thidé, E. N. Sergeev, and T. B. Leyser, Transient dynamics of secondary radiation from an HF pumped magnetized space plasma, J. Geophys. Res., 112:A09303, doi:10.1029/2007JA012454 (2007).

B. Gustavsson, T. B. Leyser, M. Kosch, M. T. Rietveld, Å. Steen, B. U. E.  Brändström, and T. Aso. Electron gyroharmonic effects in ionization and electron acceleration during high-frequency pumping in the ionosphere, Phys. Rev. Lett., 97, 195002, doi: 10.1103/PhysRevLett.97.19500 (2006).

Ya.N. Istomin, J.O. Hall and T.B. Leyser. Electromagnetic interaction of llocalized upper hybrid oscillations in a system of density depletions, Adv. Space Res., 38, 2516-2517, doi:10.1016/j.asr.2005.02.039, (2006).

N. F. Blagoveshchenskaya, V. A. Kornienko, T. D. Borisova, M. T. Rietveld, T. Bösinger, B. Thidé, T. B. Leyser and A. Brekke. Heater-induced phenomena in a coupled ionosphere–magnetosphere system, Adv. Space Res., 38, 2495–2502, doi:10.1016/j.asr.2004.12.047 (2006).

N. F. Blagoveshchenskaya, T. D. Borisova, V. A. Kornienko, T. B. Leyser, M. T. Rietveld, and B. Thidé. Artificial field-aligned irregularities in the nightside auroral ionosphere, Adv. Space Res., 38, 2503–2510, doi:10.1016/j.asr.2004.12.008 (2006).

B. Thidé, E. N. Sergeev, S. M. Grach, T. B. Leyser, and T. D. Carozzi, Competition between Langmuir and Upper-Hybrid Turbulence in a High-Frequency-Pumped Ionosphere, Phys. Rev. Lett., 95, 255002 (2005).

B. Gustavsson, T. Sergienko, M. J. Kosch, M. T. Rietveld, B. U. E.  Brändström, T. B. Leyser,  B. Isham, P. Gallop, T. Aso, M. Ejiri, T. Grydeland, Å. Steen, C. LaHoz, K. Kaila, J. Jussila, and H. Holma. The electron energy distribution during HF pumping, a picture painted with all colors, Ann. Geophys., 23, 1747-1754, 2005.

J. O. Hall, A. I. Eriksson, and T. B. Leyser, Excitation of Localized Rotating Waves in Plasma Density Cavities by Scattering of Fast Magnetosonic Waves, Phys. Rev. Lett., 92:255002 (2004).

V. L. Frolov, E. N. Sergeev, G. P. Komrakov, P. Stubbe, B. Thidé, M. Waldenvik, E. Veszelei, and T. B. Leyser, Ponderomotive narrow continuum (NCp) component in stimulated electromagnetic emission spectrum, J. Geophys. Res., 109:A07304, doi:1029/2001JA005063 (2004).

N. F. Blagoveshchenskaya, T. D. Borisova, V. A. Kornienko, T. B. Leyser, M. T. Rietveld, and B. Thidé. Artificial field-aligned irregularities in the nightside auroral ionosphere. Adv. Space Res., doi:10.1016/j.asr.2004.12.008 (2004).

Ya. N. Istomin and T. B. Leyser, Electron acceleration by cylindrical upper hybrid oscillations trapped in density irregularities in the ionosphere, Phys. Plasmas, 10, 2962-2970 (2003).

J. O. Hall and T. B. Leyser, Conversion of trapped upper hybrid oscillations and Z mode at a plasma density irregularity in the ionosphere, Phys. Plasmas, 10, 2509-2518 (2003).

M. T. Rietveld, M. J. Kosch, N. F. Blagoveshchenskay, V. A. Kornienko, T. B. Leyser, and T. K. Yeoman, Ionospheric electron heating, optical emissions, and striations induced by powerful HF radio waves at high latitudes: Aspect angle dependence. J. Geophys. Res., 108 (A4), 1141, doi:10.1029/2002JA009543 (2003).

B. Gustavsson, B. U. E. Brändström, Å. Steen, T. Sergienko, T. B. Leyser, M. T. Rietveld, T. Aso, and M. Ejiri, Nearly simultaneous images of HF-pump enhanced airglow at 6300 A and 5577 A, Geophys. Res. Lett., 29 (24), 10.1029/2002GL015350 (2002).

T. D. Carozzi, B. Thide, S. M. Grach, T. B. Leyser, M. Holz, G. P. Komrakov, V. L. Frolov, and E. N. Sergeev, Stimulated electromagnetic emissions during pump frequency sweep through fourth electron cyclotron harmonic, J. Geophys. Res., 107 (A9) 1253, doi: 10.1029/2001JA005082 (2002).

A. V. Koloskov, T. B. Leyser, Yu. M. Yampolski, and V. S. Beley, HF pump-induced large scale radial drift of small scale magnetic field-aligned density striations, J. Geophys. Res., 107 (7), doi: 10.1029/2001JA000154 (2002).

E. N. Sergeev, S. M. Grach, G. P. Komrakov, B. Thide, T. B. Leyser, T. D. Carozzi, and M. Holz, Analyzing the processes of excitation and decay of plasma turbulence near the fifth electron gyroharmonic using stimulated electromagnetic emission of the ionosphere, Radiophys. Quantum. Electron., 45, 193-210 (2002).

M. T. Rietveld, B. Isham, T. Grydeland, C. La Hoz, T. B. Leyser, F. Honary, H. Ueda, M. Kosch, and T. Hagfors, HF-pump-induced parametric instabilities in the auroral E-region, Adv. Space. Res., 29, 1363-1368 (2002).

T. D. Carozzi, B. Thide, and T. B. Leyser, G. Komrakov, V. Frolov, S. Grach, and E. Sergeev, Full polarimetry measurements of stimulated electromagnetic emissions: First results, J. Geophys. Res., 106, 21395-21407 (2001).

Ya. N. Istomin and T. B. Leyser, Diffraction of electromagnetic waves by small scale geomagnetic field-aligned density striations, Phys. Plasmas, 8, 4577-4584 (2001).

T. B. Leyser, Stimulated electromagnetic emissions by high-frequency electromagnetic pumping of the ionospheric plasma, Space Sci. Rev., 98, 223-328 (2001).

B. Gustavsson, T. Sergienko, M. T. Rietveld, F. Honary, Å. Steen, B. U. E. Brändström, T. B. Leyser, A. L. Aruliah, T. Aso, and M. Ejiri, First tomographic estimate of volume distribution of enhanced airglow emission by HF pumping, J. Geophys. Res., 106, 29105-29123 (2001).

T. Sergienko, B. Gustavsson, Å. Steen, B. U. E. Brändström, M. T. Rietveld, T. B. Leyser, and F. Honary, Analysis of excitation of the 630.0 nm airglow during a heating experiments in Tromso on February 16, 1999, Phys. Chem. Earth B, 25, 531-535 (2000).

M. Kosch, M. T. Rietveld, T. Hagfors, and T. B. Leyser, High-latitude HF-induced airglow displaced equatorwards of the pump beam, Geophys. Res. Lett., 27, 2817-2820 (2000).

T. B. Leyser, B. Gustavsson, B. U. E. Brändström, Å. Steen, F. Honary, M. T. Rietveld, T. Aso, and M. Ejiri, Simultaneous measurements of high-frequency pump-enhanced airglow and ionospheric temperatures at auroral latitudes, Adv. Polar Upper Atmos. Res., 14, 1-11 (2000).

B. U. E. Brändström, T. B. Leyser, Å. Steen, M. T. Rietveld, B. Gustavsson, T. Aso, and M. Ejiri, Unambigous evidence of HF pump-enhanced airglow at auroral latitudes, Geophys. Res. Lett., 26, 3561-3564 (1999).

B. Isham, C. La Hoz, M. T. Rietveld, T. Hagfors, and T. B. Leyser, Cavitating Langmuir turbulence observed during EISCAT high latitude ionospheric interaction experiments, Phys. Rev. Lett., 83, 2576-2579 (1999).

B. Isham, M. T. Rietveld, T. Hagfors, C. La Hoz, E. Mishin, W. Kofman, T. B. Leyser, and A. P. van Eyken, Aspect angle dependence of HF enhanced incoherent backscatter, Adv. Space Res., 24, 1003-1006 (1999).

Ya. N. Istomin and T. B. Leyser, Quantization of plasma density irregularities under the action of a powerful electromagnetic wave: Spectrum of upper hybrid oscillations self consistently trapped in the density cavities, Radiophys. Quantum Electron., 42, 641-650 (1999).

E. N. Sergeev, V. L. Frolov, S. M. Grach, G. P. Komrakov, P. Stubbe, B. Thide, T. B. Leyser, and T. Carozzi, Influence of small-scale irregularities on characteristics of the overshoot effect in the temporal evolution of stimulated electromagnetic emission. Part II. Relaxation stage, Radiophys. Quantum Electron., 42, 810-825 (1999).

E. N. Sergeev, S. M. Grach, G. P. Komrakov, V. L. Frolov, P. Stubbe, B. Thide, T. Leyser, and T. Carozzi, Influence of small-scale irregularities on characteristics of the overshoot effect in the temporal evolution of stimulated electromagnetic emission. Part I. Development stage, Radiophys. Quantum Electron., 42, 619-634 (1999).

B. Isham, T. Hagfors, E. Mishin, M. T. Rietveld, C. LaHoz, W. Kofman, and T. Leyser, A search for the location of the HF excitation of enhanced ion acoustic and Langmuir waves with EISCAT and the Tromso heater, Radiophys. Quantum Electron., 42, 607-618 (1999).

P. V. Ponomarenko, T. B. Leyser, and B. Thide, New electron gyroharmonic effects in HF scatter from pump-excited magnetic field-aligned ionospheric irregularities, J. Geophys. Res., 104, 10081-10087 (1999).

T. B. Leyser, P. A. Bernhardt, and F. T. Djuth, Nonlinear plasma processes studied by electromagnetic HF pumping of the ionospheric F-region, Review of Radio Science 1996-1999, Edited by W. R. Stone, Oxford Science Publ., 669-685 (1999).

Ya. N. Istomin and T. B. Leyser, Parametric interaction of self localized upper hybrid states in quantized plasma density irregularities, Phys. Plasmas, 5, 921-931 (1998).

S. M. Grach, G. P. Komrakov, M. A. Yurishchev, B. Thide', T. B. Leyser, and T. Carozzi, Multi-frequency Doppler radar observations of electron gyroharmonic effects during electromagnetic pumping of the ionosphere, Phys. Rev. Lett., 78, 883-886 (1997).

Ya. N. Istomin and T. B. Leyser, Small-scale magnetic field-aligned plasma density irregularities excited by a powerful electromagnetic wave, Phys. Plasmas, 4, 817-828 (1997)

T. B. Leyser, Parametric interaction between upper hybrid and lower hybrid waves in heating experiments, Geophys. Res. Lett., 18, 408–411 (1991).

T. B. Leyser, B. Thidé, H. Derblom, Å. Hedberg, B. Lundborg, P. Stubbe,
H. Kopka, Dependence of Stimulated Electromagnetic Emission on the Ionosphere and Pump Wave, J. Geophys. Res., 95, 17233–17244 (1990).



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