Radiation pressure acceleration of protons from structured thin-foil targets

The process of radiation pressure acceleration (RPA) of ions is investigated with the aim of suppressing the Rayleigh–Taylor-like transverse instabilities in laser–foil interaction. This is achieved by imposing surface and density modulations on the target surface. We also study the efficacy of RPA of ions from density modulated and structured targets in the radiation dominated regime where the radiation reaction effects are important. We show that the use of density modulated and structured targets and the radiation reaction effects can help in achieving the twin goals of high ion energy (in GeV range) and lower energy spread.

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Reducing ion energy spread in hole-boring radiation pressure acceleration by using two-ion-species targets

Laser and Particle Beams ◽

10.1017/s026303461400069x ◽

2015 ◽

Vol 33 (1) ◽

pp. 103-107 ◽

Cited By ~ 7

Author(s):

S. M. Weng ◽

M. Murakami ◽

Z. M. Sheng

Keyword(s):

Radiation Pressure ◽

Laser Pulses ◽

Ion Beams ◽

Energy Spread ◽

Intense Laser ◽

Ion Energy ◽

Fast Ions ◽

Intense Laser Pulses ◽

Fast Ion ◽

Ion Species

AbstractThe generation of fast ion beams in the hole-boring radiation pressure acceleration by intense laser pulses has been studied for targets with different ion components. We find that the oscillation of the longitudinal electric field for accelerating ions can be effectively suppressed by using a two-ion-species target, because fast ions from a two-ion-species target are distributed into more bunches and each bunch bears less charge. Consequently, the energy spread of ion beams generated in the hole-boring radiation pressure acceleration can be greatly reduced down to 3.7% according to our numerical simulation.

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Laser Radiation Pressure Acceleration of Monoenergetic Protons in an Ultra-Thin Foil

10.1063/1.3266813 ◽

2009 ◽

Cited By ~ 1

Author(s):

Bengt Eliasson ◽

Chuan S. Liu ◽

Xi Shao ◽

Roald Z. Sagdeev ◽

Padma K. Shukla ◽

...

Keyword(s):

Laser Radiation ◽

Radiation Pressure ◽

Thin Foil

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Investigations on low temperature laser-generated plasmas

Laser and Particle Beams ◽

10.1017/s0263034608000311 ◽

2008 ◽

Vol 26 (2) ◽

pp. 265-271 ◽

Cited By ~ 21

Author(s):

F. Caridi ◽

L. Torrisi ◽

D. Margarone ◽

A. Borrielli

Keyword(s):

Target Surface ◽

Ion Acceleration ◽

Ion Temperature ◽

Free Electron Density ◽

Ion Energy ◽

Equilibrium Plasma ◽

Ablation Yield ◽

Ion Energy Distributions ◽

Acceleration Voltage ◽

Non Equilibrium

AbstractA nanosecond pulsed Nd-Yag laser, operating at an intensity of about 109 W/cm2, was employed to irradiate different metallic solid targets (Al, Cu, Ta, W, and Au) in vacuum. The measured ablation yield increases with the direct current (dc) electrical conductivity of the irradiated target. The produced plasma was characterized in terms of thermal and Coulomb interaction evaluating the ion temperature and the ion acceleration voltage developed in the non-equilibrium plasma core. The particles emission produced along the normal to the target surface was investigated measuring the neutral and the ion energy distributions and fitting the experimental data with the “Coulomb-Boltzmann-shifted” function. Results indicate that the mean energy of the distributions and the equivalent ion acceleration voltage of the non-equilibrium plasma increase with the free electron density of the irradiated element.

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Dependence of the ion energy on the parameters of the laser pulse and target in the radiation-pressure-dominated regime of acceleration

Plasma Physics Reports ◽

10.1134/s1063780x10010022 ◽

2010 ◽

Vol 36 (1) ◽

pp. 15-29 ◽

Cited By ~ 12

Author(s):

E. Yu. Echkina ◽

I. N. Inovenkov ◽

T. Zh. Esirkepov ◽

F. Pegoraro ◽

M. Borghesi ◽

...

Keyword(s):

Laser Pulse ◽

Radiation Pressure ◽

Ion Energy

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Ion energy spread and current measurements of the rf-driven multicusp ion source

Review of Scientific Instruments ◽

10.1063/1.1147948 ◽

1997 ◽

Vol 68 (3) ◽

pp. 1398-1402 ◽

Cited By ~ 15

Author(s):

Y. Lee ◽

R. A. Gough ◽

W. B. Kunkel ◽

K. N. Leung ◽

L. T. Perkins ◽

...

Keyword(s):

Ion Source ◽

Energy Spread ◽

Ion Energy ◽

Multicusp Ion Source

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Radiation pressure and radiation reaction effects in laser-solid interaction

10.1117/12.881906 ◽

2010 ◽

Author(s):

A. Macchi ◽

M. Tamburini ◽

S. Veghini ◽

F. Pegoraro ◽

A. Di Piazza ◽

...

Keyword(s):

Radiation Pressure ◽

Radiation Reaction

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Ion charge state and energy enhancement by axial magnetic field applied during laser produced plasma expansion

Laser and Particle Beams ◽

10.1017/s0263034616000483 ◽

2016 ◽

Vol 34 (4) ◽

pp. 606-614 ◽

Cited By ~ 5

Author(s):

S.A. Abbasi ◽

A.H. Dogar ◽

B. Ilyas ◽

S. Ullah ◽

M. Rafique ◽

...

Keyword(s):

Magnetic Field ◽

Charge State ◽

Impact Ionization ◽

Axial Magnetic Field ◽

Debye Length ◽

Target Surface ◽

Laser Wavelength ◽

Electrostatic Model ◽

Ion Energy ◽

The Magnetic Field

AbstractThe effects of axial magnetic field on the properties of the ions ejected from Nd:YAG laser (wavelength = 1064 nm, pulse duration = 6 ns) produced expanding Cu plasma were investigated. A plane Cu target, without and with 0.23 T axial magnetic field at its surface, was irradiated in the fluence range of 2–24 J/cm2. The ions emitted along the target surface normal were analyzed with the help of ion collector and time-of-flight electrostatic ion energy analyzer. The integrated ion yield, highest ion charge state, average ion energy, and energy of individual ion charge states were found to increase by application of the magnetic field. The initial parameters of the non-equilibrium plasma such as average ion charge, equivalent potential, electron temperature, electron density, Debye length, and transient electric field were estimated from the experimental results obtained without and with application of the magnetic field. The increase of ion yield and ion charge state by application of magnetic field are most probably due to the trapping of electrons in front of the target surface, which boosts up the electron impact ionization process. The ion energy increment due to the magnetic field is discussed in the frame work of electrostatic model for ion acceleration in laser plasma.

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Optimization of relativistic laser–ion acceleration

High Power Laser Science and Engineering ◽

10.1017/hpl.2014.46 ◽

2014 ◽

Vol 2 ◽

Cited By ~ 10

Author(s):

J. Schreiber ◽

F. Bell ◽

Z. Najmudin

Keyword(s):

Radiation Pressure ◽

Pulse Energy ◽

Laser System ◽

Target Thickness ◽

Ion Acceleration ◽

Essential Property ◽

Ion Energy ◽

Starting Point ◽

Ion Energies ◽

Acceleration Model

Abstract Experiments have shown that the ion energy obtained by laser–ion acceleration can be optimized by choosing either the appropriate pulse duration or the appropriate target thickness. We demonstrate that this behavior can be described either by the target normal sheath acceleration model of Schreiber et al. or by the radiation pressure acceleration model of Bulanov and coworkers. The starting point of our considerations is that the essential property of a laser system for ion acceleration is its pulse energy and not its intensity. Maybe surprisingly we show that higher ion energies can be reached with reduced intensities.

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