Zobrazeno 1 - 10
of 158
pro vyhledávání: '"Nees, John A."'
Autor:
Peskosky, Nicholas, Ernst, Nicholas, Burger, Miloš, Murphy, Jon, Nees, John A., Jovanovic, Igor, Thomas, Alec G. R., Krushelnick, Karl
We experimentally demonstrate enhanced absorption of near relativistic optical vortex beams in $\mathrm{D_2O}$ plasmas to generate a record fast-neutron yield of $1.45 \times 10^6$ n/s/sr. Beams with a topological charge of 5 were shown to deliver up
Externí odkaz:
http://arxiv.org/abs/2405.12330
Autor:
Morrison, John T., Chowdhury, Enam A., Frische, Kyle D., Feister, Scott, Ovchinnikov, Vladimir M., Nees, John A., Orban, Chris, Freeman, Richard R., Roquemore, W. Melvyn
We present an experimental study of the generation of $\sim$MeV electrons opposite to the direction of laser propagation following the relativistic interaction at normal incidence of a $\sim$3 mJ, $10^{18}$ W/cm$^2$ short pulse laser with a flowing 3
Externí odkaz:
http://arxiv.org/abs/1501.02261
Autor:
Orban, Chris, Morrison, John T., Chowdhury, Enam D., Nees, John A., Frische, Kyle, Feister, Scott, Roquemore, W. Melvyn
Laser-accelerated electron beams have been created at a kHz repetition rate from the {\it reflection} of intense ($\sim10^{18}$ W/cm$^2$), $\sim$40 fs laser pulses focused on a continuous water-jet in an experiment at the Air Force Research Laborator
Externí odkaz:
http://arxiv.org/abs/1405.6313
Publikováno v:
Journal of Applied Physics 108, 113301 (2010)
We have developed a method for producing spatially stable micron-scale liquid targets of flexible shapes at kilohertz repetition rate for use in air and vacuum, by perturbing 5 and 30 \mu m diameter streams with femtosecond laser pulses and monitorin
Externí odkaz:
http://arxiv.org/abs/1212.3353
Publikováno v:
Physics of Plasmas, 18, 093109 (2011)
Ultra-strong laser pulses can be so intense that an electron in the focused beam loses significant energy due to gamma-photon emission while its motion deviates via the radiation back-reaction. Numerical methods and tools designed to simulate radiati
Externí odkaz:
http://arxiv.org/abs/1102.3685
Publikováno v:
Phys.Rev.Lett.105:195005,2010
QED-effects are known to occur in a strong laser pulse interaction with a counter-propagating electron beam, among these effects being electron-positron pair creation. We discuss the range of laser pulse intensities of J > 5*10^22 W/cm2 combined with
Externí odkaz:
http://arxiv.org/abs/1009.0703
Publikováno v:
Phys.Rev.E81:036412,2010
The emission from an electron in the field of a relativistically strong laser pulse is analyzed. At pulse intensities of J > 2 10^22 W/cm2 the emission from counter-propagating electrons is modified by the effects of Quantum ElectroDynamics (QED), as
Externí odkaz:
http://arxiv.org/abs/1003.0806
The emission from an electron in the field of a relativistically strong laser pulse is analyzed. At the pulse intensities of \ge 10^{22} W/cm^2 the emission from counter-propagating electrons is modified by the effects of Quantum ElectroDynamics (QED
Externí odkaz:
http://arxiv.org/abs/0910.4268
Publikováno v:
Phys. Plasmas 16, 093115 (2009)
We derive a modified non-perturbative Lorentz-Abraham-Dirac equation. It satisfies the proper conservation laws, particularly, it conserves the generalized momentum, the latter property eliminates the symmetry-breaking runaway solution. The equation
Externí odkaz:
http://arxiv.org/abs/0904.0405
Autor:
Lin, Jinpu, Easter, James H., Krushelnick, Karl, Mathis, Mark, Dong, Jian, Thomas, A.G.R., Nees, John
Publikováno v:
In Optics Communications 15 August 2018 421:79-82