Fast Ignition by Intense Laser-Accelerated Proton Beams

Roth, Markus; Cowan, T. E.; Key, M.H.; Hatchett, S.; Brown, C.; Fountain, W. F.; Johnson, J.; Pennington, D. M.; Snavely, R.; Wilks, S. C.; Yasuike, K.; Rühl, H.; Пегораро, Ф.; Bulanov, Sergei V.; Campbell, E. M.; Perry, M. D.; Powell, H. T.

doi:10.1103/physrevlett.86.436

Cited by 1,206 publications

(524 citation statements)

References 13 publications

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“…At the end of the implosion process, when the fuel 'stagnates' up against itself at the centre, the DT is compressed to thousands of times its normal solid density of 220 kg/m 3 . A range of variants upon the fast ignition principle have been thought of [3][4][5][6][7] however, the basic principle is similar in all cases. The secondary laser acts, by some means, to heat a small portion of the imploded DT fuel to the conditions required for thermonuclear ignition.…”

Section: Fast Ignitionmentioning

confidence: 99%

Generation of shock waves in dense plasmas by high-intensity laser pulses

et al. 2015

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Abstract. When intense short-pulse laser beams (I > 10 22 W/m 2 ,  < 20 ps) interact with high density plasmas, strong shock waves are launched. These shock waves may be generated by a range of processes, and the relative signifi cance of the various mechanisms driving the formation of these shock waves is not well understood. It is challenging to obtain experimental data on shock waves near the focus of such intense laser-plasma interactions. The hydrodynamics of such interactions is, however, of great importance to fast ignition based inertial confi nement fusion schemes as it places limits upon the time available for depositing energy in the compressed fuel, and thereby directly affects the laser requirements. In this manuscript we present the results of magnetohydrodynamic simulations showing the formation of shock waves under such conditions, driven by the j × B force and the thermal pressure gradient (where j is the current density and B the magnetic fi eld strength). The time it takes for shock waves to form is evaluated over a wide range of material and current densities. It is shown that the formation of intense relativistic electron current driven shock waves and other related hydrodynamic phenomena may be expected over time scales of relevance to intense laser-plasma experiments and the fast ignition approach to inertial confi nement fusion. A newly emerging technique for studying such interactions is also discussed. This approach is based upon Doppler spectroscopy and offers promise for investigating early time shock wave hydrodynamics launched by intense laser pulses.

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Section: Fast Ignitionmentioning

confidence: 99%

Generation of shock waves in dense plasmas by high-intensity laser pulses

et al. 2015

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“…Due to the very large divergences and the too high kinetic energies found in EFI experiments and simulations [2,3], ion-driven fast ignition (IFI) has been taking an increasing interest over the last years. Ion fast ignition [4,5] offers several advantages over EFI, such as generation of collimated beams, well known interaction with the plasma and higher flexibility. Some examples of such a flexibility are the control of ion spectra [6,7], the possibility of choosing the optimal ion species [8,9], including deuterium ions [10], and the use of multiple beams for target irradiation [9,11,12].…”

Section: Introductionmentioning

confidence: 99%

“…Just after the first experimental evidence of proton acceleration by the Target Normal Sheath Acceleration (TNSA) mechanism [15], its application to FI was proposed [5]. This was followed by theoretical studies on the TNSA scheme [16,17], target studies [18][19][20][21], new irradiation schemes [9,11,12] and the use of ions heavier than protons [22,23].…”

Section: Introductionmentioning

confidence: 99%

Ion beam requirements for fast ignition of inertial fusion targets

Honrubia

Murakami

2015

Physics of Plasmas

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Ion beam requirements for fast ignition are investigated by numerical simulation taking into account new effects such as ion beam divergence not included before. We assume that ions are generated by the TNSA scheme in a curved foil placed inside a re-entrant cone and focused on the cone apex or beyond. From the focusing point to the compressed core ions propagate with a given divergence angle. Ignition energies are obtained for two compressed fuel configurations heated by proton and carbon ion beams. The dependence of the ignition energies on the beam divergence angle and on the position of the ion beam focusing point have been analyzed. Comparison between TNSA and quasi-monoenergetic ions is also shown.

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“…Email: zhaoyt@impcas.ac.cn by methods of high energy proton/ion radiography and in fast ignition of a compressed fuel. Associated investigations have been pursued with increasing intensity by major accelerator laboratories and institutions in Europe, the USA, Russia, and Japan, where significant progress has been made during the last few decades [1][2][3][4][5][6][7][8][9][10][11][12][13][14] .…”

Section: Introductionmentioning

confidence: 99%

High energy density physics research at IMP, Lanzhou, China

Zhao

Cheng

Wang

et al. 2014

High Pow Laser Sci Eng

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Recent research activities relevant to high energy density physics (HEDP) driven by the heavy ion beam at the Institute of Modern Physics, Chinese Academy of Sciences are presented. Radiography of static objects with the fast extracted high energy carbon ion beam from the Cooling Storage Ring is discussed. Investigation of the low energy heavy ion beam and plasma interaction is reported. With HEDP research as one of the main goals, the project HIAF (High Intensity heavy-ion Accelerator Facility), proposed by the Institute of Modern Physics as the 12th five-year-plan of China, is introduced.

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Fast Ignition by Intense Laser-Accelerated Proton Beams

Cited by 1,206 publications

References 13 publications

Generation of shock waves in dense plasmas by high-intensity laser pulses

Generation of shock waves in dense plasmas by high-intensity laser pulses

Ion beam requirements for fast ignition of inertial fusion targets

High energy density physics research at IMP, Lanzhou, China

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