Steady state ion acceleration by a circularly polarized laser pulse

Zhang, Xiaomei; Shen, Baifei; Chen, Yu; Li, Xuemei; Zhu, Jinhan; Wang, Fengchao

doi:10.1016/j.physleta.2007.04.110

Cited by 14 publications

(11 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For a target containing two species of ions irradiated by a laser pulse, the conservations of momentum and energy yield [25,30]…”

Section: A Acceleration Process With Fixed Charge-mass Ratiomentioning

confidence: 99%

“…In the case of single species plasma, the reflected ion velocities are v i1 ¼ 0:0295 [25] for m i1 ¼ 1836 and v i1 ¼ 0:0094 for m i1 ¼ 18 360, respectively, from the simulations (see Fig. 4), where the velocity is normalized by c. They both agree well with the analytical results v i ¼ 2u s according to the simple model [5,25,32], which is often used to evaluate the shock velocity, or the recessing surface velocity of the single species plasmas as u s $ ffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi ffi a 2 =ðm i n i Þ p , where n i is the ion density. The simulation results in the case of the proton-dominated plasmas with n i1 ¼ 8, n i2 ¼ 2, i.e., the density ratio n i1 =n i2 ¼ 4 at two instants are shown in Fig.…”

Section: A Acceleration Process With Fixed Charge-mass Ratiomentioning

confidence: 99%

“…Other promising schemes, such as direct laserpressure acceleration [20,21] and plasma wake acceleration [22] are also extensively explored. Recently, ion acceleration by a circularly polarized (CP) laser pulse has attracted much attention because there is no apparent selfheating mechanism for plasmas and ions can be accelerated stably by the electrostatic field due to the charge separation in the front of the target [23][24][25][26][27]. This mecha-nism is the so-called electrostatic shock acceleration.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Ion acceleration with mixed solid targets interacting with circularly polarized lasers

Zhang

Shen

et al. 2009

Phys. Rev. ST Accel. Beams

Self Cite

View full text Add to dashboard Cite

The interaction of a circularly polarized laser pulse with a mixed solid target containing two species of ions is studied by particle in cell simulations and analytical model. After the interaction tends to be stable, it is demonstrated that the acceleration is more efficient for the heavier ions than that in plasmas containing a single kind of heavy ion and the acceleration efficiency is higher when its proportion is lower. To obtain monoenergetic heavy-ion beams, a sandwich target with a thin mixed ion layer between two light ion layers and a microstructured target are proposed. The influences of parameters of the laser pulse and target on ion acceleration are discussed in detail. It is found that, when the target is thick enough, a cold target is more appropriate for heavy-ion acceleration than a warm target, and the velocity of the reflected heavy ions is proportional to the laser amplitude.

show abstract

“…For a target containing two species of ions irradiated by a laser pulse, the conservations of momentum and energy yield [25,30]…”

Section: A Acceleration Process With Fixed Charge-mass Ratiomentioning

confidence: 99%

Section: A Acceleration Process With Fixed Charge-mass Ratiomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ion acceleration with mixed solid targets interacting with circularly polarized lasers

Zhang

Shen

et al. 2009

Phys. Rev. ST Accel. Beams

Self Cite

View full text Add to dashboard Cite

show abstract

“…[10][11][12][13][14][15][16][17][18][19][20][21] In the difference to the electrostatic, collisionless shocks in low-density plasmas, 22,23 where the ions are partially trapped in the downstream region, the shocks in strongly overdense plasmas may have very high Mach numbers and the upstream ions are reflected completely in the charge separation layer. 10,12 The use of a circularly polarized laser pulse is shown to be advantageous in order to avoid strong electron overheating and to form a quasimonoenergetic ion bunch by adjusting appropriate laser pulse and plasma parameters. The energy distribution of ions accelerated in a nonuniform plasma and the estimates for corresponding laser pulse durations were obtained in Ref.…”

Section: Introductionmentioning

confidence: 99%

Relativistic laser piston model: Ponderomotive ion acceleration in dense plasmas using ultraintense laser pulses

et al. 2009

View full text Add to dashboard Cite

A high-efficiency overmoded klystron-like relativistic backward wave oscillator with low guiding magnetic field Phys. Plasmas 19, 093102 (2012) Relativistic plasmas in uniform magnetic fields. I. General off-axis coupling methods J. Math. Phys. 53, 083302 (2012) Derivation of nonlinear Schrödinger equation for electrostatic and electromagnetic waves in fully relativistic twofluid plasmas by the reductive perturbation method Phys. Plasmas 19, 082303 (2012) Parametric decays in relativistic magnetized electron-positron plasmas with relativistic temperatures Laser ponderomotive force at superhigh intensities provides an efficient ion acceleration in bulk dense targets and evacuates a channel enabling further laser beam propagation. The developed quasistationary model of a laser piston-a double layer structure supported by the radiation pressure-predicts the general parameters of the acceleration process in homogeneous and inhomogeneous overdense plasmas. Particle-in-cell simulations confirm the estimated characteristics in a wide range of laser intensities and ion densities and show advantages of circularly polarized laser pulses. Two nonstationary effects are identified in the simulations. First, oscillations of the piston velocity and of the thickness of the ion charge separation layer broaden the energy spectrum of accelerated ions. Second, the electrons accelerated toward the incoming laser wave emit strong high-frequency radiation, enabling a cooling effect, which helps to sustain high charge neutrality in the piston and to maintain an efficient ion acceleration.

show abstract

“…However, for the CP laser pulse, there is only a steady component of the ponderomotive, i.e., the light pressure dominates the interaction. We have emphasized the steady state ion acceleration from a cold solid target by a flat-top CP laser pulse 16,17 . By analyzing the temporal evolution of ion motion from the ion density and velocity distributions, we found the light pressure pushes electrons inwards, leading to an electron-ion double-layer structure at the front surface of the target.…”

Section: High Quality Proton Acceleration From Complex Targetmentioning

confidence: 99%

Generation of energetic protons from GeV to TeV

Shen

Zhang

2011

SPIE Proceedings

Self Cite

View full text Add to dashboard Cite

ABSTRACT：The theoretical research works on proton and ion acceleration done by our group are reviewed. A complex target consisting of a front horizontal slice adjoining a conventional heavy ion and proton double-layer slab are used to produce more-fast moving hot electrons to enhance the target-normal sheath acceleration (TNSA) so that the protons in the proton layer can be accelerated to energies more than three times, and the energy spread halved, that from the simple double-layer slab. A sandwich target design with a thin compound ion layer between two light-ion layers and a micro-structured target design are proposed for obtaining efficiently monoenergetic heavy-ion beams. Radiation pressure acceleration from multi stage shock acceleration to continuous light sail acceleration for ultra-thin foils is used to generate GeV protons. The foil thickness for light pressure acceleration is studied.Quasi-single-cycle relativistic laser pulse is generated with an accelerated flying foil. In order to accelerate protons to higher energy up to TeV, wake acceleration is proposed. Mixed plasma is used to enhance the wake and radiation pressure acceleration is used to help protons to be easily trapped in the wake.

show abstract

Steady state ion acceleration by a circularly polarized laser pulse

Cited by 14 publications

References 14 publications

Ion acceleration with mixed solid targets interacting with circularly polarized lasers

Ion acceleration with mixed solid targets interacting with circularly polarized lasers

Relativistic laser piston model: Ponderomotive ion acceleration in dense plasmas using ultraintense laser pulses

Generation of energetic protons from GeV to TeV

Contact Info

Product

Resources

About