Zobrazeno 1 - 10
of 41
pro vyhledávání: '"Ngirmang, Gregory"'
We introduce a new mechanism for second-harmonic generation through geometrically rectifying-funneling-ballistic electrons in THz optical resonators. Our resonant rectifiers inherently act as second-order harmonic generators, rectifying currents with
Externí odkaz:
http://arxiv.org/abs/2411.09212
Ultra intense lasers are a promising source of energetic ions for various applications. An interesting approach described in Ferri et al. 2019 argues from Particle-in-Cell simulations that using two laser pulses of half energy (half intensity) arrivi
Externí odkaz:
http://arxiv.org/abs/2101.04650
Autor:
Smith, Joseph R., Orban, Chris, Morrison, John T., George, Kevin M., Ngirmang, Gregory K., Chowdhury, Enam A., Roquemore, W. Mel
The development of ultra-intense laser-based sources of high energy ions is an important goal, with a variety of potential applications. One of the barriers to achieving this goal is the need to maximize the conversion efficiency from laser energy to
Externí odkaz:
http://arxiv.org/abs/2005.07746
Autor:
Ngirmang, Gregory Kodeb
I present computational simulations of the efficient production of relativistic electron beams from the interaction of an intense, short-pulse laser normally incident on a solid density target in which electrons are accelerated backwards, or counter
Autor:
Ngirmang, Gregory K., Morrison, John T., George, Kevin M., Smith, Joseph R., Frische, Kyle D., Orban, Chris, Chowdhury, Enam A., Roquemore, W. Mel
When a relativistic intensity laser interacts with the surface of a solid density target, suprathermal electron currents are subject to Weibel instability filamentation when propagating through the thermal population of the bulk target. We present ti
Externí odkaz:
http://arxiv.org/abs/1910.12940
Autor:
Smith, Joseph R., Orban, Chris, Ngirmang, Gregory K., Morrison, John T., George, Kevin M., Chowdhury, Enam A., Roquemore, W. M.
We use particle-in-cell (PIC) simulations and simple analytic models to investigate the laser-plasma interaction known as ponderomotive steepening. When normally incident laser light reflects at the critical surface of a plasma, the resulting standin
Externí odkaz:
http://arxiv.org/abs/1905.00888
Autor:
Ngirmang, Gregory K., Orban, Chris, Feister, Scott, Morrison, John T., Chowdhury, Enam A., Roquemore, W. M.
Advances in ultra-intense laser technology are enabling, for the first time, relativistic intensities at mid-infrared (mid-IR) wavelengths. Anticipating further experimental research in this domain, we present high-resolution two dimensional Particle
Externí odkaz:
http://arxiv.org/abs/1704.08118
Autor:
Ngirmang, Gregory K., Orban, Chris, Feister, Scott, Morrison, John T., Frische, Kyle, Chowdhury, Enam A., Roquemore, W. M.
We present 3D Particle-in-Cell (PIC) modeling of an ultra-intense laser experiment by the Extreme Light group at the Air Force Research Laboratory (AFRL) using the PIC code LSP. This is the first time PIC simulations have been performed in 3D for thi
Externí odkaz:
http://arxiv.org/abs/1510.05000
Autor:
Feister, Scott, Austin, Drake R., Morrison, John T., Frische, Kyle D., Orban, Chris, Ngirmang, Gregory, Handler, Abraham, Smith, Joseph R. H., Schillaci, Mark, LaVerne, Jay A., Chowdhury, Enam A., Freeman, R. R., Roquemore, W. M.
We report observation of kHz-pulsed-laser-accelerated electron energies up to 3 MeV in the -$k_\text{laser}$ (backward) direction from a 3 mJ laser interacting at normal incidence with a solid density, flowing-liquid target. The electrons/MeV/s.r. >1
Externí odkaz:
http://arxiv.org/abs/1508.07374
Autor:
Ngirmang, Gregory K.1,2 ngirmang@protonmail.com, Morrison, John T.3, George, Kevin M.3, Smith, Joseph R.4, Frische, Kyle D.3, Orban, Chris4, Chowdhury, Enam A.5,6, Roquemore, W. Mel2
Publikováno v:
Scientific Reports. 6/18/2020, Vol. 10 Issue 1, p1-10. 10p.
