2 edition of Fast electron heating of shock compressed solids at high intensties relevant to fast ignition found in the catalog.
Fast electron heating of shock compressed solids at high intensties relevant to fast ignition
D. . Batani
|Series||Rutherford Appleton Laboratory Technical Report -- RAL-TR-98-015|
|Contributions||Rutherford Appleton Laboratory., Council For The Central Laboratory of The Research Councils.|
At the very beginning of the interaction process, heating occurs at the front of the interacting plasmas. Fig. 2 shows the temporal evolution of the electron phase space. The fastest electron electrostatic two-stream instability develops near the plasma fronts (see panel A corresponding to the time of 50 τ 0).It heats the electrons in narrow front layers to a maximum energy that exceeds . hot electrons in solid matter which has been compressed with shock waves driven by high-energy nanoseconds laser beams. 7) Study of exotic states of matter for basic physics and astrophysics The availability of high energy femtosecond lasers allows the physics of matter to be studied under ex-treme conditions, at an intermediate.
suprathermal electron production in Cu foils laser-irradiated at shock-ignition-relevant conditions. Generation of hot electrons accompanying interaction of high-intensity lasers with targets, their transport and energy deposition in the near-solid density matter with a varied degree of ionization. Stable and collimated electron beam with spot size as small as μm after >μm propagation distance (an angular divergence angle of 20°!) in solid density plasma targets has been demonstrated with FI-relevant (ps, >1-kJ) laser pulses Such collimated beam would meet the required heating beam size for FI.
The study of the transport of relativistic laser-driven electrons is a subject of interest for many applications including proton-ion acceleration 1,2,3,4,5, fast ignition approach to inertial. Garry McCracken, Peter Stott, in Fusion (Second Edition), HiPER. HiPER (High Power laser Energy Research) is a European-led proposal for an experimental facility to demonstrate the feasibility of laser-driven fusion as a future energy source using the fast-ignition project is still at the design stage—a preliminary report received positive reviews from the European.
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We present one of the first results of relativistic laser intensities of the transport of fast electrons in high density and warm plasmas. The fast electrons are produced by the interaction of 40 J, 1 ps, 5 × 10 19 W cm −2 laser pulses with solid foil targets.
A J, ns laser focalized over a µm diameter zone on the opposite side of the foil is used to create a shock propagating Cited by: Focused intensities larger than W/cm2 generated intense currents of fast electrons through the in-depth regions of the target, which are shock-compressed at times the initial solid.
Fast electron heating of shock compressed solids at high intensities relevant to fast ignition By D. Batani, A. Bernardinello, V. Masella and Chilton (United Kingdom). Rutherford Appleton Lab. Council for the Central Lab.
of the Research Councils (CLRC). For both the solid and the compressed cases, the fast electron transport divergence and range are investigated, via the K α emission from an embedded copper layer, for a conducting (aluminium.
Fast ignition (FI) is a promising approach for high-energy-gain inertial confinement fusion in the laboratory. To achieve ignition, the energy of a Cited by: 2.
Fast electron propagation in high-density plasmas created by 1D shock wave compression: Experiments and simulations J J Santos, D Batani, P McKenna et al.-Fast electron energy transport in solid density and compressed plasma P.
Norreys, D Batani, S Baton et al.-Refluxing of fast electrons in solid targets M N Quinn, X H Yuan, X X Lin et al In the context of the fast ignition studies, the heating of the dense fuel by fast electrons appears to be one of the most relevant aspects currently investigated .
Simple scaling laws for laser-generated fast electron heating of solids that employ a Spitzer-like resistivity are unlikely to be universally adequate as this model does not produce an adequate description of a material's behaviour at low temperatures.
This is demonstrated in this paper by using both numerical simulations and by comparing existing analytical scaling laws for low temperature. The electron heating and the electrostatic potential jump across collisionless shocks play an important, if not dominant, role in the electron momentum balance.
We present here a survey of these two quantities over a large sample of fast mode collisionless shocks. R Snavely's 48 research works with 1, citations and 1, reads, including: Study of ultraintense laser propagation in overdense plasmas for fast ignition. Fast ignition (FI) is a new scheme for inertial confinement fusion, in which a high-power short-pulse laser is injected in the imploded shell to heat and ignite the fuel core plasma [1, 2].Since its initial proposals, many theoretical, simulation and experimental research works have been performed as described elsewhere in this special issue of Nuclear Fusion.
High-intensity (>10 18 W cm −2), high-contrast (10 9) short-pulse (solid density is because they allow for. Baton's 58 research works with citations and 2, reads, including: Preliminary results from the LMJ-PETAL experiment on hot electrons characterization in the context of Shock Ignition.
Fast ignition (FI) inertial confinement fusion is a variant of inertial fusion in which DT fuel is first compressed to high density and then ignited by a relativistic electron beam generated by a fast.
It has been suggested that fast electrons may play a beneficial role in the formation of the ignitor shock in shock ignition owing to the high areal density of the fuel at the time of the ignitor pulse.
In this paper, we extend previous studies which have focused on monoenergetic electron sources to populations with extended energy distributions.
Heat in 2xs Fast Ignition (FI) Isochoric - fast heating Fuel gcm-3 Spark gcm-3 Indirect Drive Fast Ignition 3ω to 2ω# Indirect Drive Hot Spot ignition 3ω to.
1. Introduction. Since the development of lasers with pulse intensities on the order of 10 15 W/cm 2, there has been a lively international experimental and theoretical effort to understand how energy from the laser field is transferred to a target (whether a gas, tenuous plasma, or solid and over-dense matter).Much of this interest is driven by the hope that fusion material can ultimately be.
Mitchell, S. Schwartz, Nonlocal electron heating at the Earth's bow shock and the role of the magnetically tangent point, Journal of Geophysical Research: Space Physics, /JA,12, (), ().
Shock ignition is a relatively new scenario in inertial confinement fusion. It was Shcherbakov  who proposed to ignite a spherical target compressed to a high density with a converging shock that scenario the initial temperature of the compressed fuel was less than 1 keV, and essentially the all energy needed for ignition was brought by the shock.
In this article we present time-resolved measurements of fast electron heating of Al foils in the ultra-high intensity (10 21 Wcm −2), short pulse (40 fs) regime. BALL AND GALLOWAY: ELECTRON HEATING BY CROSS-SHOCK POTENT -1 Bz/B u - -1 0 1 2 X Figure 2. Simple analytic forms of B• and Ex. Equations of Motion The electron motion is determined by the Lorentz equation m dv/dt - q(E + v x B), which will be ex.
Modern high-power lasers can generate extreme states of matter that are relevant to astrophysics1, equation-of-state studies2 and fusion energy research3,4. Laser-driven implosions of .A petawatt laser for fast ignition experiments (LFEX) laser system [N.
Miyanaga et al., J. Phys. IV France81 ()], which is currently capable of delivering 2 kJ in a ps pulse using 4 laser beams, has been constructed beside the GEKKO-XII laser facility for demonstrating efficient fast heating of a dense plasma up to the ignition temperature under the auspices of the Fast Ignition.