Control of transmission of right circularly polarized laser light in overdense plasma by applied magnetic field pulses

Abstract

The effect of a transient magnetic field on right-hand circularly polarized (RHCP) laser light propagation in overcritical-density plasma is investigated. When the electron gyrofrequency is larger than the wave frequency, RHCP light can propagate along the external magnetic field in an overcritical density plasma without resonance or cutoff. However, when the magnetic field falls to below the cyclotron resonance point, the propagating laser pulse will be truncated and the local plasma electrons resonantly heated. Particle-in-cell simulation shows that when applied to a thin slab, the process can produce intense two-cycle light pulses as well as long-lasting self-magnetic fields.

Ultrafast wave-particle energy transfer in the collapse of standing whistler waves

“…The most important feature is no cutoff density for the whistler waves. Whistler waves can propagate inside of any density plasmas unless they encounter a strong density gradient so that they interact directly even with overdense plasmas [20][21][22]. Another critical fact is that a large electromotive potential, or an electrostatic potential, in the * sano@ile.osaka-u.ac.jp longitudinal direction appears in the standing wave of whistler-mode.…”

“…(b) corresponds to a tokamak 10 18 -1020 3 × 10 16 -10 18 3 × 10 10 -10 12 3 × 10 −4 -10 −10 21 -10 23 2 × 10 19 -1021 2 × 10 13 -10 15 0.2-10 ne0/nc 2-100 Application glass & TiSap laser CO2 laser tokamak planetary magnetosphere TABLE I. Characteristic physical quantities for the thermal ion-plasma generation over 10 keV.…”

Excitation of Electrostatic Standing Wave in the Superposition of Two Counter Propagating Relativistic Whistler Waves

“…The characteristic features and propagation characteristics of whistler waves have been studied extensively in the past. [5][6][7]9,[12][13][14] This mode has a unique attribute of non-existence of cut-off which enables it to propagate through over-dense plasma system 5,[15][16][17][18] . The relativistic theory developed by Akheizer and Polovin in 1956 7 clearly shows how even in over-dense plasma system whistler waves can readily propagate without any cut-off density.…”

Plasma concept for generating circularly polarized electromagnetic waves with relativistic amplitude

“…Since there is no cutoff density for the whistler wave, it can propagate in plasmas at any density [19][20][21]. This essential feature stimulates magnetized plasma devices to manage the transmission of CP waves [22] and generate CP waves by the Faraday effect [23].…”