Zobrazeno 1 - 10
of 184
pro vyhledávání: '"E. Dieckmann"'
Publikováno v:
New Journal of Physics, Vol 25, Iss 6, p 063017 (2023)
We study with a 3D particle-in-cell simulation discontinuities between an electron–positron pair plasma and magnetized electrons and protons. A pair plasma is injected at one simulation boundary with a speed 0.6 c along its normal. It expands into
Externí odkaz:
https://doaj.org/article/04d24710509143909b38e419ff939cab
Publikováno v:
Annales Geophysicae, Vol 28, Pp 2127-2132 (2010)
Beam-plasma instabilities are a key physical process in many astrophysical phenomena. Within the fireball model of Gamma ray bursts, they first mediate a relativistic collisionless shock before they produce upstream the turbulence needed for the F
Externí odkaz:
https://doaj.org/article/2395660d28bd4c02bb7d893d6e11d3bf
Autor:
M. E. Dieckmann
Publikováno v:
Nonlinear Processes in Geophysics, Vol 15, Iss 6, Pp 831-846 (2008)
Recent particle-in-cell (PIC) simulation studies have addressed particle acceleration and magnetic field generation in relativistic astrophysical flows by plasma phase space structures. We discuss the astrophysical environments such as the jets of co
Externí odkaz:
https://doaj.org/article/7f67890bc6bb48399b3bb0dcc5960d87
Publikováno v:
Phys.Plasmas
Phys.Plasmas, 2022, 29 (9), pp.092103. ⟨10.1063/5.0106114⟩
Phys.Plasmas, 2022, 29 (9), pp.092103. ⟨10.1063/5.0106114⟩
By means of a particle-in-cell (PIC) simulation, we study the interaction between a uniform magnetized ambient electron-proton plasma at rest and an unmagnetized pair plasma, which we inject at one simulation boundary with a mildly relativistic mean
Autor:
M. E. Dieckmann, S. C. Chapman
Publikováno v:
Annales Geophysicae, Vol 17, Pp 321-327 (1999)
A Fourier domain technique has been proposed previously which, in principle, quantifies the extent to which multipoint in-situ measurements can identify whether or not an observed structure is time stationary in its rest frame. Once a structure, s
Externí odkaz:
https://doaj.org/article/a41e86a05e5a4a4587f1e5953ff9c2c3
Publikováno v:
Astron.Astrophys.
Astron.Astrophys., 2022, 658, pp.A100. ⟨10.1051/0004-6361/202141730⟩
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, 2022, 658, pp.A100. ⟨10.1051/0004-6361/202141730⟩
Astron.Astrophys., 2022, 658, pp.A100. ⟨10.1051/0004-6361/202141730⟩
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, 2022, 658, pp.A100. ⟨10.1051/0004-6361/202141730⟩
Context. Relativistic jets are ubiquitous in astrophysics. High Mass Microquasars (HMMQs) are useful labs to study such jets, as they are relatively close and evolve over observable time scales. The ambient medium into which the jet propagates is, ho
Autor:
Bixue Hou, Brendan Dromey, Mark E Dieckmann, Z. H. He, A. G. R. Thomas, John Nees, Gianluca Sarri, Karl Krushelnick, Matthew Zepf, A. Di Piazza, Anatoly Maksimchuk, M. Vargas, William Schumaker, Christoph H. Keitel, Vladimir Chvykov, V. Yanovsky
Publikováno v:
Physical Review Letters. 124
Particle-in-cell simulations of jets of electrons and positrons in an ambient electron–proton plasma have revealed an acceleration of positrons at the expense of electron kinetic energy. We show that a filamentation instability, between an unmagnet
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0e61397b45dc775bb33f6530fa9d6c13
http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-171757
http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-171757
Autor:
Antoine Bret, Mark E Dieckmann
When two collisionless plasma shells collide, they interpenetrate and the overlapping region may turn Weibel unstable for some values of the collision parameters. This instability grows magnetic filaments which, at saturation, have to block the incom
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e615f874e18467c8caa5d5ec699e1489
http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-165835
http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-165835
Publikováno v:
Laser and Particle Beams. 35:513-519
In plasmas where the mean-free-path is much larger than the size of the system, shock waves can arise with a front much shorter than the mean-free-path. These so-called “collisionless shocks” are mediated by collective plasma interactions. Studie