Effects of ps and ns laser pulses for giant ion source

Hora, Heinrich; Badziak, J.; Boody, F.P.; Höpfl, R.; Jungwirth, K.; Králíková, B.; Krása, J.; Láska, L.; Parys, P.; Peřina, Vratislav; Pfeifer, M.; Rohlena, K.; Skála, J.; Ullschmied, J.; Wołowski, J.; Woryna, E.

doi:10.1016/s0030-4018(02)01534-1

Cited by 85 publications

(103 citation statements)

References 32 publications

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“…To summarize, what is experimentally and theoretically clarified is the ultrahigh acceleration of plasma blocks measured by Sauerbrey [13] , repeated by Földes et al [18] , and measured by Badziak et al [19] as skin layer plasma block moving against the laser light all in exact agreement with the numerical prediction ( Figure 1) based on non-thermal nonlinear force processes [20][21][22] as dielectric explosion. The necessary conditions are unique: providing a flat interaction surface, avoiding self-focusing, and providing an extremely high contrast of the laser pulse.…”

Section: Non-thermal Plasma Block Ignition Of Fusionsupporting

confidence: 72%

Avalanche boron fusion by laser picosecond block ignition with magnetic trapping for clean and economic reactor

Hora

Korn²,

Eliezer

et al. 2016

High Pow Laser Sci Eng

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(2015)) for the combination of the non-thermal block ignition using ultrahigh intensity laser pulses of picoseconds duration. The ultrahigh acceleration above 10 20 cm s −2 for plasma blocks was theoretically and numerically predicted since 1978 (Hora, Physics of Laser Driven Plasmas (Wiley, 1981), pp. 178 and 179) and measured (Sauerbrey, Phys. Plasmas 3, 4712 (1996)) in exact agreement (Hora et al., Phys. Plasmas 14, 072701 (2007)) when the dominating force was overcoming thermal processes. This is based on Maxwell's stress tensor by the dielectric properties of plasma leading to the nonlinear (ponderomotive) force f NL resulting in ultra-fast expanding plasma blocks by a dielectric explosion. Combining this with measured ultrahigh magnetic fields and the avalanche process opens an option for an environmentally absolute clean and economic boron fusion power reactor. This is supported also by other experiments with very high HB11 reactions under different conditions (Labaune et al., Nature Commun. 4, 2506).

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Section: Non-thermal Plasma Block Ignition Of Fusionsupporting

confidence: 72%

Avalanche boron fusion by laser picosecond block ignition with magnetic trapping for clean and economic reactor

Hora

Korn²,

Eliezer

et al. 2016

High Pow Laser Sci Eng

View full text Add to dashboard Cite

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“…This ultrahigh acceleration was measured for the plane geometry by Sauerbrey (1996) which was 100,000 times higher than ever measured before in a laboratory. The sophisticated measurements by Doppler shift of spectral lines reflected from the outer block moving against the incident laser beam were repeated by Földes et al (2000) in agreement with the theory of non-linear force acceleration evaluated (Hora et al, 2002a;. The ion density in the space charge neutral blocks was -as theoretically predicted 1978 -above 10 12 Amp/cm 2 (Hora et al, 2002b).…”

Section: Non-thermal Laser Energy Transfer To Targetssupporting

confidence: 52%

“…Schematically, this can be seen in Figure 3 (Hora et al, 2002b). Apart from the appearance of the ultrahigh velocities, the high densities of the space charge neutral plasma blocks resulted in very high ion current densities above 10 12 Amp/cm 2 (Hora et al, 2002a) which values were predicted in the computer outputs of 1978 (Hora et al, 1978;Hora, 1981) (Fig. 2).…”

Section: Non-thermal Laser Energy Transfer To Targetsmentioning

confidence: 85%

“…The most important need for the discovery to confirm the theoretical prediction of the ultrahigh acceleration (Sauerbrey, 1996;Földes et al, 2000) and of the ultrahigh ion current densities (Hora et al, 2002a) was based on Mourou's et al, chirped-pulse amplification (CPA) to generate extreme powerful laser pulses of ps and shorter duration reaching now 7.12 petawatt (PW) power and 27 fs duration (Li et al, 2015) with Ti:sapphire lasers with sufficient suppression of transverse parasitic lasing have been produced with the aim that 30 PW-ps pulses may be available within few years by combining of a number of beams, if not fiber lasers with singlemode and spherically focused (Hora et al, 2014a) output will be available. This was crucial for the measurement by Sauerbrey (1996) together with the second ingredient of using an extreme contrast ratio against prepulses to avoid relativistic self-focusing as clarified by Zhang et al (1998).…”

Section: Non-thermal Laser Energy Transfer To Targetsmentioning

confidence: 99%

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Fusion energy using avalanche increased boron reactions for block-ignition by ultrahigh power picosecond laser pulses

et al. 2015

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Exceptionally high reaction gains of hydrogen protons measured with the boron isotope 11 are compared with other fusion reactions. This is leading to the conclusion that secondary avalanche reactions are happening and confirming the results of high-gain, neutron-free, clean, safe, low-cost, and long-term available energy. The essential basis is the unusual nonthermal block-ignition scheme with picosecond laser pulses of extremely high powers above the petawatt range.

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“…During this process, the ps and ns laser pulses generated quite different ion emission current densities, leading to up to 100 MeV by sub-picosecond laser plasma [6]. On the other hand, Brown et al [7] also reported that the EMP signals collected at Lawrence Livermore National Laboratory mainly covered the frequency domains from several hundreds of MHz to several GHz.…”

Section: Photonic Sensors 250mentioning

confidence: 99%

Investigation into the electromagnetic impulses from long-pulse laser illuminating solid targets inside a laser facility

Yang

et al. 2016

Photonic Sens

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Emission of the electromagnetic pulses (EMP) due to laser-target interaction in laser facility had been evaluated using a cone antenna in this work. The microwave in frequencies ranging from several hundreds of MHz to 2 GHz was recorded when long-pulse lasers with several thousands of joules illuminated the solid targets, meanwhile the voltage signals from 1 V to 4 V were captured as functions of laser energy and backlight laser, where the corresponding electric field strengths were obtained by simulating the cone antenna in combination with conducting a mathematical process (Tiknohov Regularization with L curve). All the typical coupled voltage oscillations displayed multiple peaks and had duration of up to 80 ns before decaying into noise and mechanisms of the EMP generation was schematically interpreted in basis of the practical measuring environments. The resultant data were expected to offer basic know-how to achieve inertial confinement fusion.

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Effects of ps and ns laser pulses for giant ion source

Cited by 85 publications

References 32 publications

Avalanche boron fusion by laser picosecond block ignition with magnetic trapping for clean and economic reactor

Avalanche boron fusion by laser picosecond block ignition with magnetic trapping for clean and economic reactor

Fusion energy using avalanche increased boron reactions for block-ignition by ultrahigh power picosecond laser pulses

Investigation into the electromagnetic impulses from long-pulse laser illuminating solid targets inside a laser facility

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