Zobrazeno 1 - 10
of 13
pro vyhledávání: '"M. Z. Rafat"'
Autor:
Antoine F. J. Runge, Y. Long Qiang, Tristram J. Alexander, M. Z. Rafat, Darren D. Hudson, Andrea Blanco-Redondo, C. Martijn de Sterke
Publikováno v:
Physical Review Research, Vol 3, Iss 1, p 013166 (2021)
Temporal solitons are optical pulses that arise from the balance of negative group-velocity dispersion and self-phase modulation. For decades, only quadratic dispersion was considered with higher order dispersion often thought of as a nuisance. Follo
Externí odkaz:
https://doaj.org/article/4c34053fb5f941268388de3d918e43c0
Autor:
M. Z. Rafat, Holger R. Dullin, Boris T. Kuhlmey, Alessandro Tuniz, Haoyuan Luo, Dibyendu Roy, Sean Skinner, Tristram J. Alexander, Michael S. Wheatland, C. Martijn de Sterke
We consider the motion of a light sail that is accelerated by a powerful laser beam. We derive the equations of motion for two proof-of-concept sail designs with damped internal degrees of freedom. Using linear stability analysis we show that perturb
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9db43fcba53f857299d961447d2b1f8a
http://arxiv.org/abs/2106.10961
http://arxiv.org/abs/2106.10961
Autor:
Y. Long Qiang, Andrea Blanco-Redondo, Antoine F. J. Runge, C. Martijn de Sterke, M. Z. Rafat, Tristram J. Alexander, Darren D. Hudson
Publikováno v:
Physical Review Research. 3
The authors demonstrate the existence of optical solitons arising from the balance between self-phase modulation and negative, pure, even high-order dispersion using a fiber laser incorporating a spectral pulse shaper.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f074f94d2e4a56366d9a71b3e99cadd0
https://doi.org/10.1103/physrevresearch.3.013166
https://doi.org/10.1103/physrevresearch.3.013166
We consider critically the three most widely favored pulsar radio emission mechanisms: coherent curvature emission (CCE), beam-driven relativistic plasma emission (RPE) and anomalous Doppler emission (ADE). We assume that the pulsar plasma is one dim
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d5eabc6d9ea1f21a972f3f9fbd1a46d1
We propose and discuss an alternative pulsar radio emission mechanism that relies on rotation-driven plasma oscillations, rather than on a beam-driven instability, and suggest that it may be the generic radio emission mechanism for pulsars. We identi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0d535ac60eb2a5e00cd1099083d85030
Publikováno v:
Journal of Plasma Physics. 85
Wave dispersion in a pulsar plasma is discussed emphasizing the relevance of different inertial frames, notably the plasma rest frame ${\mathcal{K}}$ and the pulsar frame ${\mathcal{K}}^{\prime }$ in which the plasma is streaming with speed $\unicode
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4f5b432e029da4a89a0beed8d479587e
https://doi.org/10.1017/s0022377819000448
https://doi.org/10.1017/s0022377819000448
Publikováno v:
Journal of Plasma Physics. 85
Wave dispersion in a pulsar plasma (a one-dimensional, strongly magnetized, pair plasma streaming highly relativistically with a large spread in Lorentz factors in its rest frame) is discussed, motivated by interest in beam-driven wave turbulence and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3763ba0fbf870c61eb35f85efb34eb52
https://doi.org/10.1017/s0022377819000394
https://doi.org/10.1017/s0022377819000394
Beam-driven instabilities are considered in a pulsar plasma assuming that both the background plasma and the beam are relativistic J\"uttner distributions. In the rest frame of the background, the only waves that can satisfy the resonance condition a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c29830357c2b15ab439f99499bc7d198
Autor:
D. B. Melrose, M. Z. Rafat
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 449:794-808
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::82ab2165bcd994c8458b2ed43c4bc26b
https://doi.org/10.1093/mnras/stu2563
https://doi.org/10.1093/mnras/stu2563
Publikováno v:
The Astrophysical Journal. 698:115-123
We consider the motion of a charge in a large amplitude electrostatic wave with a triangular wave form relevant to an oscillating model of a pulsar magnetosphere. The (one-dimensional) orbit of a particle in such a wave is found exactly in terms of W
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::95418f7ddd1481f4ae3403a628088d1d
https://doi.org/10.1088/0004-637x/698/1/115
https://doi.org/10.1088/0004-637x/698/1/115