Hot Electron Detection In Intense Laser-Plasma Interactions
نویسندگان
چکیده
Our experimental group develops methods to detect high-energy electrons produced by laserplasma instabilities. These electrons, which range up to hundreds of keV , prove a major challenge for inertial confinement fusion (such as at NIF). They can preheat fuel, resulting in more energy being required to compress fuel to the point of ignition. We concentrated a laser (to an intensity of 10 ∼ 10W/cm) on various targets, exciting them into a plasma state, then built and tested detection mechanisms for the emitted electrons.
منابع مشابه
Study of non-linear interaction of circular laser pulse propagating through hot magnetized plasma in the presence of a planar magnetostatic wiggler
In this paper, the self-focusing property of an intense circularly polarized laser pulse in hot magnetized plasma is investigated theoretically. First, an envelope equation governing the spot-size of the laser beam for both left- and right-hand polarizations has been derived in the presence of a planar wiggler. Furthermore, non-linear dispersion relation of laser pulse is obtained by using Maxw...
متن کاملشبیهسازی ذرهای شتاب دادن الکترونها در پلاسمای کم چگال
One of the interesting Laser-Plasma phenomena, when the laser power is high and ultra intense, is the generation of large amplitude plasma waves (Wakefield) and electron acceleration. An intense electromagnetic laser pulse can create plasma oscillations through the action of the nonlinear pondermotive force. electrons trapped in the wake can be accelerated to high energies, more than 1 TW. Of t...
متن کاملHot Electron Production in Plasmas Illuminated by Intense Lasers¶
Recent experiments with petawatt laser plasmas revealed interesting and unpredictable phenomena [1, 2]. A large number of fast electrons with energies up to several tens of MeV were detected. The estimated energy of these electrons was up to 10% of the pump laser energy. On the other hand, the plasma temperature was of the order of hundreds of eV and was only weakly dependent on laser intensity...
متن کاملEffects of intense laser pulse properties on wake field acceleration in magnetized plasma: Half-Sine Shape (HSS) and Gaussian Shape (GS) pulses
In this paper, we have simulated the excitation of wake fields in the interaction of an intensive laser pulses having Half-Sine and Gaussian time envelopes with a fully ionized cold plasma using particle in cell (PIC) method. We investigated the dependency of wake filed amplitude to different laser and plasma parameters such as laser wavelength, pulse duration and electron number density. In ad...
متن کاملEffects of Laser Wavelength and Density Scalelength on Absorption of Ultrashort Intense Lasers on Solid-Density Targets
Hot electron temperatures and electron energy spectra in the course of interaction between intense laser pulse and overdense plasmas are reexamined from a viewpoint of the difference in laser wavelength. The hot electron temperature measured by a particle-in-cell simulation is scaled by I rather than Iλ at the interaction with overdense plasmas with fixed ions, where I and λ are the laser inten...
متن کامل