Focusing and control of multiaperture ion beams by plasma lenses

High-Current Heavy Ion Beams in the Electrostatic Plasma Lens

“…This is connected with a drift instability arising in inhomogeneous crossed E⊥B fields in the lens volume. These collective processes were first observed in experiments [3]. When a hydrogen ion beam was transported through the lens, small-scale turbulent oscillations arise in the 20 -50 Mhz frequency range.…”

“…In the absence of spherical aberrations the maximum compression of low-divergence beams may be restricted by a finite phase volume, uncompensated beam space charge, and momentum aberrations due to a finite azimuthal twist of beam particles in the lens magnetic field. Estimates made in [3,8] show that the main reason for the low compression of the light hydrogen ion beams, under the experimental conditions employed [3,4], are momentum aberrations. For heavy ions the role of momentum aberrations, that lead to space charge separation and limitation of beam compression, decreases rapidly for higher ion mass and energy.…”

Plasma photonic crystal

“…Many theories have been employed to explain the efficiency enhancement [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. In this paper, plasma filled in the microwave device has been regarded as plasma photonic crystals [20].…”

Dispersion Characteristics and Optimization of Reflectivity of Binary One Dimensional Plasma Photonic Crystal Having Linearly Graded Material

“…The concept of a photonic crystal has been rapidly extended to other materials such as negative index materials, plasma, etc. Moreover, plasma has got much attention due to its technical applications in many new devices such plasma lens [3], plasma antenna [4], plasma stealth aircraft [5], etc. It is a well-known fact that when electromagnetic waves are launched near the plasma slab, then the electromagnetic waves with angular frequency (ω) smaller than plasma frequency (ω p ) are attenuated while those having higher frequency than plasma frequency get transmitted.…”