Laser-driven quasimonoenergetic proton burst from water spray target

Ramakrishna, B.; Murakami, M.; Borghesi, M.; Ehrentraut, L.; Nickles, P. V.; Schnürer, M.; Steinke, S.; Psikal, J.; Tikhonchuk, V.; Ter-Avetisyan, S.
August 2010
Physics of Plasmas;Aug2010, Vol. 17 Issue 8, p083113
Academic Journal
A narrow band proton bursts at energies of 1.6±0.08 MeV were observed when a water spray consisting of ∅︀(150 nm)-diameter droplets was irradiated by an ultrashort laser pulse of about 45 fs duration and at an intensity of 5×1019 W/cm2. The results are explained by a Coulomb explosion of sub-laser-wavelength droplets composed of two ion species. The laser prepulse plays an important role. By pre-evaporation of the droplets, its diameter is reduced so that the main pulse can interact with a smaller droplet, and this remaining bulk can be ionized to high states. In the case of water, the mixture of quite differently charged ions establishes an “iso-Coulomb-potential” during the droplet explosion such that protons are accelerated to a peak energy with a narrow energy spread. The model explains this crucial point, which differs critically from usual Coulomb explosion or ion sheath acceleration mechanisms.


Related Articles

  • Laser ion acceleration by a near-critical density target. Yogo, A.; Daido, H.; Bulanov, S. V.; Esirkepov, T. Zh.; Nemoto, K.; Oishi, Y.; Nayuki, T.; Fujii, T.; Ogura, K.; Orimo, S.; Sagisaka, A.; Ma, J.-L.; Mori, M.; Nishiuchi, M.; Pirozhkov, A. S.; Nakamura, S.; Noda, A.; Nagatomo, H. // AIP Conference Proceedings;7/15/2008, Vol. 1024 Issue 1, p157 

    Protons having energies up to 3.8 MeV are experimentally generated by the p-polarized, 45 fs, ∼1019 W/cm2 laser pulse interacting with a near-critical plasma cloud produced by the irradiation of the amplified spontaneous emission (ASE) pedestal at an intensity of ∼1013 W/cm2 onto a...

  • Laser proton acceleration in a water spray target. Ter-Avetisyan, S.; Schnürer, M.; Nickles, P. V.; Smirnov, M. B.; Sandner, W.; Andreev, A.; Platonov, K.; Psikal, J.; Tikhonchuk, V. // Physics of Plasmas;Aug2008, Vol. 15 Issue 8, p083106 

    Studies of interaction of a cloud of submicrometer water droplets with ultrashort (40 fs) and intense (∼2×1019 W/cm2) laser pulses demonstrate an efficient acceleration of protons and oxygen ions. Due to a high ratio of the volume to the enveloping surface of a single droplet and a...

  • Energetic electrons and protons generated from the interaction of ultrashort laser pulses with microdroplet plasmas. Jun Zheng; Zheng-Ming Sheng; Xiao-Yu Peng; Jie Zhang // Physics of Plasmas;Nov2005, Vol. 12 Issue 11, p113105 

    Generation of fast electrons and protons from ultrashort laser interactions with microdroplet plasmas has been simulated by two-dimensional particle-in-cell simulations. At weakly relativistic laser intensities, two jets of hot electrons are found to emit symmetrically in the backward direction...

  • One- and two-dimensional simulations or ultra-snort-pulse reflectometry (abstract) Cohen, Bruce I.; Kaiser, Thomas B.; Garrison, John C. // Review of Scientific Instruments;Jan1997, Vol. 68 Issue 1, p477 

    Reports on a study which examined ultra-short-pulse reflectometry by means of the numerical integration of one- and two-dimensional full-wave equations for ordinary and extraordinary modes propagating in plasma. Identification of Bragg resonance effects; Correlation reflectometry measurements.

  • Interaction of an ultrashort, relativistically strong laser pulse with an overdense plasma. Bulanov, S.V.; Naumova, N.M.; Pegoraro, F. // Physics of Plasmas;Mar1994, Vol. 1 Issue 3, p745 

    Examines the interaction of an ultrashort, relativistically strong laser pulse with an overdense plasma. Oblique incidence on a nonuniform plasma; Small amplitude electromagnetic waves in nonuniform plasmas; Nonlinear plasma dynamics near the sharp boundary.

  • Structure of the wake field in plasma channels. Andreev, N.E.; Gorbunov, L.M.; Kirsanov, V.I.; Nakajima, K.; Ogata, A. // Physics of Plasmas;Apr97, Vol. 4 Issue 4, p1145 

    Derives an equation that describes the linear response of an underdense inhomogeneous plasma during the propagation of a laser pulse along the axis of a plasma channel with a characteristic width. Structure of the wake field; Doubling of the phase interval of the wave where the simultaneous...

  • Driving laser pulse evolution in a hollow channel laser wakefield accelerator. Volfbeyn, P.; Lee, P. B.; Wurtele, J.; Leemans, W. P.; Shvets, G. // Physics of Plasmas;Sep97, Vol. 4 Issue 9, p3403 

    Presents an analytic and numerical study of the coupling between a high-intensity laser pulse and a plasma wake in the context of laser wakefield acceleration in a hollow channel. Description of the laser wavelength reddening and pulse length shortening using simple scaling laws; Treatment of...

  • Generation of wakefields by elliptically polarized laser pulses in a magnetized plasma. Shukla, P.K. // Physics of Plasmas;Apr99, Vol. 6 Issue 4, p1363 

    Focuses on the generation of wakefields by elliptically polarized short laser pulses in a magnetized plasma. Potential profiles obtained for given laser beam envelopes; Acceleration of electrons to high energy due to the surfatron process.

  • Electron acceleration by an intense short-pulse laser in underdense plasma. Yu, M. Y.; Yu, Wei; Chen, Z. Y.; Zhang, J.; Yin, Y.; Cao, L. H.; Lu, P. X.; Xu, Z. Z. // Physics of Plasmas;Jun2003, Vol. 10 Issue 6, p2468 

    Electron acceleration from the interaction of an intense short-pulse laser with low density plasma is considered. The relation between direct electron acceleration within the laser pulse and that in the wake is investigated analytically. The magnitude and location of the...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics