Computations for nonlinear force driven plasma blocks by picosecond laser pulses for fusion

Chen, Yu; Osman, Frederick; Hora, Heinrich; Zhang, Jie; Badziak, J.; Wołowski, J.; Jungwirth, K.; Rohlena, K.; Ullschmied, J.

doi:10.1017/s0022377804002983

Cited by 25 publications

(20 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on the very detailed genuine two-fluid hydrodynamic plasma code (Lalousis & Hora, 1983;Cang et al, 2005) laser interaction shows how plasma blocks of many vacuum wavelength thickness of plasma in the direction of the laser beam are generated, similar to earlier one-fluid computations (Lawrence, 1978, Hora, 1991 but now with very many more details. The larger thickness is a result by using initial plasma densities with Rayleigh profiles while initial linear ramps of densities could not produce such large thicknesses.…”

Section: Discussionsupporting

confidence: 66%

“…2), where the dielectric swelling of the laser field was generating plasma blocks of more than 20 vacuum wavelengths thickness (Lawrence, 1978;see Hora, 1991, Section 10.5) by using Rayleigh profiles. After first summarizing properties of these profiles, we report very detailed results about thick, nonlinear force driven (Hora, 1991, Section 8) plasma block generation using the very general genuine twofluid hydrodynamics (Lalousis & Hora, 1983;Hora et al, 1984;Cang et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…10.17) with minimum internal reflection. The electromagnetic energy density (E 2 þ H 2 )/(8p) is shown at the time of 1.5 ps after begin of the constant irradiation for comparison with the results ofCang et al (2005).…”

mentioning

confidence: 99%

See 2 more Smart Citations

Layers from initial Rayleigh density profiles by directed nonlinear force driven plasma blocks for alternative fast ignition

et al. 2009

Self Cite

View full text Add to dashboard Cite

Measurement of extremely new phenomena during the interaction of laser pulses with terawatt and higher power and picoseconds with plasmas arrived at drastically different anomalies in contrast to the usual observations if the laser pulses were very clean with a contrast ratio higher than 10 8 . This was guaranteed by the suppression of prepulses during less than dozens of ps before the arrival of the main pulse resulting in the suppression of relativistic selffocusing. This anomaly was confirmed in many experimental details, and explained and numerically reproduced as a nonlinear force acceleration of skin layers generating quasi-neutral plasma blocks with ion current densities above 10 11 A/cm 2 . This may support the requirement to produce a fast ignition deuterium tritium fusion at densities not much higher than the solid state by a single shot PW-ps laser pulse. With the aim to achieve separately studied ignition conditions, we are studying numerically how the necessary nonlinear force accelerated plasma blocks may reach the highest possible thickness by using optimized dielectric properties of the irradiated plasma. The use of double Rayleigh initial density profiles results in many wavelength thick low reflectivity directed plasma blocks of modest temperatures. Results of computations with the genuine two-fluid model are presented.

show abstract

Section: Discussionsupporting

confidence: 66%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Layers from initial Rayleigh density profiles by directed nonlinear force driven plasma blocks for alternative fast ignition

et al. 2009

Self Cite

View full text Add to dashboard Cite

show abstract

“…At varying the initial density profile, larger thicknesses have been calculated, even for the same low intensities as in Fig. 2 10 15 _ion(pm) see [43]. Fig.…”

Section: Unique Interaction Without Relativistic Self-focusingmentioning

confidence: 75%

Ablation of nonlinear-force driven plasma blocks for fast igniter application

et al. 2006

Self Cite

View full text Add to dashboard Cite

Interaction of TW-ps laser with plasma results in a skin layer mechanism for nonlinear (ponderomotive) force driven two dimensional plasma blocks (pistons) if a very high contrast ratio is provided for suppression of relativistic self-focusing. This Skin layer acceleration (SLA) [1] results in space charge neutral plasma blocks with ion current densities larger than 10 10 Amp/cm 2 [1-3]. Using Ions in the MeV range results in 1000 times higher proton or DT current densities [3] than the proton fast igniter [4] is using and may result in better conditions of this fast ignitor scheme. Using ballistic focusing of the generated plasma blocks and a short time thermal expansion of these blocks for increasing their thickness while keeping the high ion current densities, results in conditions favourable for this option of fast ignition of a fusion target. Some details of the interaction processes are still to be analysed but the solutions studies to date are most encouraging.

show abstract

“…for avoiding relativistic self focusing and as seen before from the KrF ps-TW interaction with ideal plane geometry nonlinear force acceleration~Sauer-brey, 1996!. This all was reproduced from numerical simulations with the then fully permitted genuine two fluidcomputations~Badziak et al, 2004acomputations~Badziak et al, , 2004bCang et al, 2005!. PIC is now a broad stream development~Wilks etEsirkepov et al, 2004! not only for exploring the relativistic effects of PW-ps laser plasma interaction.…”

mentioning

confidence: 72%

Difference between relativistic petawatt-picosecond laser-plasma interaction and subrelativistic plasma-block generation

Hora

2005

Laser Part. Beams

View full text Add to dashboard Cite

Some preliminary views are presented to the topic "Fast High Density Plasma Blocks Driven by Picosecond Terawatt Lasers" of the UWS-International Workshop 1-4 December 2004 in Sydney, Australia, underlining the motivation to explain the difference between the relativistic and the subrelativistic effects of ps-laser pulse interaction with plasma at powers above TW. This refers to specifically selected experimental and theoretical presentations at the workshop containing results for explaining the differences but also the important applications for studies on the fast ignitor scheme for application on nuclear fusion energy. One of the aims with relativistic proton beams is to realize conditions of spark ignition, while the subrelativistic case implies the generation of fast plasma blocks eventually with the possibility to ignite a fusion flame in uncompressed solid DT fuel for a power station with high efficiency.

show abstract

Computations for nonlinear force driven plasma blocks by picosecond laser pulses for fusion

Cited by 25 publications

References 15 publications

Layers from initial Rayleigh density profiles by directed nonlinear force driven plasma blocks for alternative fast ignition

Layers from initial Rayleigh density profiles by directed nonlinear force driven plasma blocks for alternative fast ignition

Ablation of nonlinear-force driven plasma blocks for fast igniter application

Difference between relativistic petawatt-picosecond laser-plasma interaction and subrelativistic plasma-block generation

Contact Info

Product

Resources

About