Seeding magnetic fields for laser-driven flux compression in high-energy-density plasmas

Gotchev, O. V.; Knauer, J. P.; Chang, P. Y.; Jang, N. W.; Shoup, M. J.; Meyerhofer, D. D.; Betti, R.
April 2009
Review of Scientific Instruments;Apr2009, Vol. 80 Issue 4, p043504
Academic Journal
A compact, self-contained magnetic-seed-field generator (5 to 16 T) is the enabling technology for a novel laser-driven flux-compression scheme in laser-driven targets. A magnetized target is directly irradiated by a kilojoule or megajoule laser to compress the preseeded magnetic field to thousands of teslas. A fast (300 ns), 80 kA current pulse delivered by a portable pulsed-power system is discharged into a low-mass coil that surrounds the laser target. A >15 T target field has been demonstrated using a <100 J capacitor bank, a laser-triggered switch, and a low-impedance (<1 Ω) strip line. The device has been integrated into a series of magnetic-flux-compression experiments on the 60 beam, 30 kJ OMEGA laser [T. R. Boehly et al., Opt. Commun. 133, 495 (1997)]. The initial application is a novel magneto-inertial fusion approach [O. V. Gotchev et al., J. Fusion Energy 27, 25 (2008)] to inertial confinement fusion (ICF), where the amplified magnetic field can inhibit thermal conduction losses from the hot spot of a compressed target. This can lead to the ignition of massive shells imploded with low velocity—a way of reaching higher gains than is possible with conventional ICF.


Related Articles

  • Development of time resolved x-ray spectroscopy in high intensity laser-plasma interactions. Notley, M. M.; Weber, R. L.; Fell, B.; Jeffries, J.; Freeman, R. R.; Mackinnon, A. J.; Dickson, R.; Hey, D.; Khattak, F.; Saiz, E. Garcia; Gregori, G. // Review of Scientific Instruments;Oct2006, Vol. 77 Issue 10, p10F322 

    This article discusses the design of a novel time resolved von Hamos Bragg spectrometer to provide spectra in the region around the titanium K-α and He-α lines. The instrument consists of a highly oriented pyrolitic graphite mosaic crystal coupled to a picosecond x-ray streak camera....

  • Reduction of flux creep by heat pulses. Levin, G. A.; Almasan, C. C.; Gajewski, D. A.; Maple, M. B. // Applied Physics Letters;1/5/1998, Vol. 72 Issue 1 

    We investigated the possibility of reducing the giant flux creep in high-temperature superconductors by temporarily increasing the temperature T above the operating temperature T[sub 0], after the critical state is created at T[sub 0]. This T increase leads to a supercritical state which decays...

  • Neutron calibration for the FRX-C/LSM magnetic compression experiment. Chrien, R. E. // Review of Scientific Instruments;Jun91, Vol. 62 Issue 6, p1489 

    Neutron source strength and yield from field-reversed configurations have been measured in the FRX-C/LSM magnetic compression experiment using plastic scintillators, indium activation samples, and moderated rhodium activation counters. The calibration of these neutron detectors is complicated by...

  • 0D Modelisation of the Magnetic Flux Compression Scheme for Isentropic Compression Experiments. L’Eplattenier, P.; Avrillaud, G.; Vanpoperynghe, J. // AIP Conference Proceedings;2002, Vol. 620 Issue 1, p1188 

    This paper deals with the advantages of using a flux compression scheme in High Pulsed Power (HPP) generators in order to produce isentropic magnetic high pressure ramps. Our field of interest are pressures in the range of several Mbars. For isentropic compression above 1 Mbar, the main...

  • To the space by laser light (II). Apollonov, Victor V. // Natural Science;Sep2012, Vol. 4 Issue 9, p713 

    New approach to the problem of laser jet engine (LJE) creation is based on the use of shock waves (SW) resonance association mechanism, generated by the optical pulsating discharge (OPD). For the creation OPD is proposed to use powerful pulse-periodic (P-P) laser radiation with duration of...

  • Radiation reaction in the interaction of ultra-high irradiance lasers with electrons. Koga, James // AIP Conference Proceedings;7/15/2008, Vol. 1024 Issue 1, p25 

    In recent years there has been rapid development of ultra-high irradiance lasers. Coincidently, high energy quasi-monoenergetic ultra-short electron bunches have been generated using such lasers in laser-plasma interaction experiments. We show that the combined use of such lasers and electron...

  • High-energy proton generation from thin-foil targets with a high-intensity ultra-short pulse laser. Sagisaka, Akito; Daido, Hiroyuki; Yogo, Akifumi; Ogura, Koichi; Orimo, Satoshi; Ma, Jinglong; Mori, Michiaki; Nishiuchi, Mamiko; Pirozhkov, Alexander S.; Bulanov, Sergei V.; Esirkepov, Timur Zh.; Oishi, Yuji; Nayuki, Takuya; Fujii, Takashi; Nemoto, Koshichi // AIP Conference Proceedings;7/15/2008, Vol. 1024 Issue 1, p151 

    We observe the proton signals with thin-foil polyimide and copper targets with a high-intensity Ti:sapphire laser pulse. High-energy protons with the maximum energy of 2.3 MeV for 7.5 μm thick polyimide target and 1.2 MeV for 3 μm thick copper target are generated at the laser intensity of...

  • A large aperture electro-optic deflector. Bosco, A.; Boogert, S. T.; Boorman, G. E.; Blair, G. A. // Applied Physics Letters;5/25/2009, Vol. 94 Issue 21, p211104 

    An electro-optic laser beam deflector with a clear optical aperture of 8.6 mm has been designed, realized, and tested. The electro-optic material used to implement the device was a MgO:LiNbO3 crystal. The exceptionally large aperture makes the device suitable for applications where fast scanning...

  • A novel nuclear pyrometry for the characterization of high-energy bremsstrahlung and electrons produced in relativistic laser-plasma interactions. Günther, M. M.; Sonnabend, K.; Brambrink, E.; Vogt, K.; Bagnoud, V.; Harres, K.; Roth, M. // Physics of Plasmas;Aug2011, Vol. 18 Issue 8, p083102 

    We present a novel nuclear activation-based method for the investigation of high-energy bremsstrahlung produced by electrons above 7 MeV generated by a high-power laser. The main component is a novel high-density activation target that is a pseudo alloy of several selected isotopes with...


Read the Article


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

Try another library?
Sign out of this library

Other Topics