Transport of energy by ultraintense laser-generated electrons in nail-wire targets

Ma, T.; Key, M. H.; Mason, R. J.; Akli, K. U.; Daskalova, R. L.; Freeman, R. R.; Green, J. S.; Highbarger, K.; Jaanimagi, P. A.; King, J. A.; Lancaster, K. L.; Hatchett, S. P.; Mackinnon, A. J.; MacPhee, A. G.; Norreys, P. A.; Patel, P. K.; Stephens, R. B.; Theobald, W.; Van Woerkom, L. D.; Wei, M. S.
November 2009
Physics of Plasmas;Nov2009, Vol. 16 Issue 11, p112702
Academic Journal
Nail-wire targets (20 μm diameter copper wires with 80 μm hemispherical head) were used to investigate energy transport by relativistic fast electrons generated in intense laser-plasma interactions. The targets were irradiated using the 300 J, 1 ps, and 2×1020 W·cm-2 Vulcan laser at the Rutherford Appleton Laboratory. A spherically bent crystal imager, a highly ordered pyrolytic graphite spectrometer, and single photon counting charge-coupled device gave absolute Cu Kα measurements. Results show a concentration of energy deposition in the head and an approximately exponential fall-off along the wire with about 60 μm 1/e decay length due to resistive inhibition. The coupling efficiency to the wire was 3.3±1.7% with an average hot electron temperature of 620±125 keV. Extreme ultraviolet images (68 and 256 eV) indicate additional heating of a thin surface layer of the wire. Modeling using the hybrid E-PLAS code has been compared with the experimental data, showing evidence of resistive heating, magnetic trapping, and surface transport.


Related Articles

  • Laser shaping and optimization of the laser-plasma interaction. Spitkovsky, Anatoly; Chen, Pisin // AIP Conference Proceedings;2001, Vol. 569 Issue 1, p183 

    The physics of energy transfer between the laser and the plasma in laser wakefield accelerators is studied. We find that wake excitation by arbitrary laser shapes can be parameterized using the total pulse energy and pulse depletion length. A technique for determining laser profiles that produce...

  • Coherent synchrotron emission from electron nanobunches formed in relativistic laser-plasma interactions. Dromey, B.; Rykovanov, S.; Yeung, M.; Hörlein, R.; Jung, D.; Gautier, D. C.; Dzelzainis, T.; Kiefer, D.; Palaniyppan, S.; Shah, R.; Schreiber, J.; Ruhl, H.; Fernandez, J. C.; Lewis, C. L. S.; Zepf, M.; Hegelich, B. M. // Nature Physics;Nov2012, Vol. 8 Issue 11, p804 

    Extreme ultraviolet (XUV) and X-ray harmonic spectra produced by intense laser-solid interactions have, so far, been consistent with Doppler upshifted reflection from collective relativistic plasma oscillations-the relativistically oscillating mirror mechanism. Recent theoretical work, however,...

  • Intense laser-plasma interactions: New frontiers in high energy density physics. Norreys, P. A.; Beg, F. N.; Sentoku, Y.; Silva, L. O.; Smith, R. A.; Trines, R. M. G. M. // Physics of Plasmas;Apr2009, Vol. 16 Issue 4, p041002 

    A review is presented here of a number of invited papers presented at the 2008 American Physical Society April meeting [held jointly with High Energy Density Physics/High Energy Density Laboratory Astrophysics (HEDP/HEDLA) Conference] devoted to intense laser-matter interactions. They include...

  • Coupled mode effects on energy transfer in weakly coupled, two-temperature plasmas. Vorberger, J.; Gericke, D. O. // Physics of Plasmas;Aug2009, Vol. 16 Issue 8, p082702 

    The effects of collective modes on the temperature relaxation in fully ionized, weakly coupled plasmas are investigated. A coupled mode (CM) formula for the electron-ion energy transfer is derived within the random phase approximation and it is shown how it can be evaluated using standard...

  • Absolute Kα line spectroscopy for cone-guided fast-ignition targets. Nishimura, H.; Zhang, Z.; Namimoto, T.; Fujioka, S.; Koga, M.; Shiraga, H.; Ozaki, T.; Iwawaki, T.; Morioka, T.; Morita, K.; Habara, H.; Tanaka, K. A.; Nishikino, M.; Kawachi, T.; Sagisaka, A.; Orimo, S.; Pirozhkov, A. S.; Ogura, K.; Yogo, A.; Kiriyama, H. // EPJ Web of Conferences;2013, Issue 59, p1 

    Absolute Kα line spectroscopy is proposed to study laser-plasma interactions taking place in cone-guided fast ignition targets. A transmission-type spectrometer was developed, and its absolute sensitivity was measured with laser-generated x-rays and radioisotopes, showing good agreement with...

  • Energy deposition at front and rear surfaces during picosecond laser interaction with fused silica. Salleo, A.; Génin, F. Y.; Feit, M. D.; Rubenchik, A. M.; Sands, T.; Mao, S. S.; Russo, R. E. // Applied Physics Letters;5/7/2001, Vol. 78 Issue 19, p2840 

    The difference between front-surface and rear-surface energy deposition of a 35 ps laser pulse (λ=1064 nm) in fused silica was investigated using shadowgraphic and laser-deflection techniques. Shock waves were observed in the glass and in air. Shock waves generated in air at the front surface...

  • Generation of high pressure shocks relevant to the shock-ignition intensity regime. Batani, D.; Antonelli, L.; Atzeni, S.; Badziak, J.; Baffigi, F.; Chodukowski, T.; Consoli, F.; Cristoforetti, G.; De Angelis, R.; Dudzak, R.; Folpini, G.; Giuffrida, L.; Gizzi, L. A.; Kalinowska, Z.; Koester, P.; Krousky, E.; Krus, M.; Labate, L.; Levato, T.; Maheut, Y. // Physics of Plasmas;Mar2014, Vol. 21 Issue 3, p1 

    An experiment was performed using the PALS laser to study laser-target coupling and laser-plasma interaction in an intensity regime ≤1016 W/cm², relevant for the "shock ignition" approach to Inertial Confinement Fusion. A first beam at low intensity was used to create an extended...

  • Ultraviolet upconversion in Pr3+:Y2SiO5 crystal by Ar+ laser (488 nm) excitation. Sun, C. L.; Li, J. F.; Hu, C. H.; Jiang, H. M.; Jiang, Z. K. // European Physical Journal D -- Atoms, Molecules, Clusters & Opti;Aug2006, Vol. 39 Issue 2, p303 

    Ultraviolet upconversion fluorescence band (260–350 nm) has been observed from Pr3+:Y2SiO5 pumped by Ar+ ion laser (488 nm). Power dependence of the fluorescence emitted from 4f5d, 3P0 and 1D2 were measured. The upconversion mechanism was analyzed using the rate equations with a...

  • Luminescence of LiTb(PO):Sm and energy transfer from Tb to Sm under vacuum ultraviolet-ultraviolet excitation. Han, B.; Liang, H.; Huang, Y.; Tao, Y.; Su, Q. // Applied Physics B: Lasers & Optics;Jul2011, Vol. 104 Issue 1, p241 

    The photoluminescence (PL) of LiTb(PO), LiGdSm(PO), and LiTbSm(PO) under vacuum ultraviolet (VUV)/ultraviolet (UV) excitation were studied. We observed the VUV-UV sensitization of Sm emission (561 nm, 601 nm, 649 nm, and 710 nm) by Tb in LiTb(PO):Sm, which leads to the yellow light emission (486...


Read the Article


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

Try another library?
Sign out of this library

Other Topics