MagLIF: Dynamics and energetics of liner and fuel

Lee, Sing; Damideh, Vahid; Btaiche, J.C.

doi:10.1016/j.vacuum.2023.112471

Cited by 4 publications

(1 citation statement)

References 32 publications

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“…The numerical experiments confirm that all the parameters of such a machine are technologically feasible. The simulations also suggest the necessity to add a high-pressure fusion harvest tube [43] to address the problem of excessive remnant beam ions exiting the plasma focus pinch region and to further enhance beamtarget fusion reactions by increasing the interaction path length at increased interaction density. A final yield of 3.7×10 16 D-T neutrons carrying kinetic energy of 83.6 kJ is conservatively estimated, demonstrating Q=0.01.…”

Section: Discussionmentioning

confidence: 99%

Pushing the limits of existing plasma focus towards 10¹⁶ fusion neutrons with Q = 0.01

Lee¹

2022

Plasma Sci. Technol.

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Existing conventional megajoule plasma focus machines with 2–3 MA are producing fusion neutron yields of several times 1011 in deuterium operation, the fusion yields being predominantly beam-gas target. Increasing the current to 10 MA and using 50%-50% D-T mixture would scale the neutron yield towards 1016 D-T fusion neutrons. In this work, we derive the Lawson criterion for plasma focus devices with beam-target fusion neutron mechanism, so that we may glimpse what future technological advancements are needed for a breakeven Q=1 plasma focus. We do numerical experiments with a present-day feasible 0.9 MV, 8.1 MJ, 11 MA machine operating in 100 Torr in 50%-50% D-T mixture. The Lee Code simulation gives a detailed description of the plasma focus dynamics through each phase, and provides plasma and yield parameters which show that out of 1.1 × 1019 fast beam ions produced in the plasma focus pinch, only 1.24 × 1014 ions take part in beam-target fusion reactions within the pinch, producing the same number of D-T neutrons. The remnant beam ions, numbering practically 1019, exit the focus pinch at 1.9 MeV, which is far above the 115 keV ion energy necessary for optimum beam-target cross-section. It is proposed to regain the lost fusion rates, by using a high-pressure D-T filled, drift-tube to attenuate the energy of the remnant beam ions until they reach the energy for optimum fusion cross-section. Such a fusion enhancement tube would further harvest beam-target fusion reactions by increasing the interaction path length (1 m) at increased interaction density (6 atm). A gain factor of 300 is conservatively estimated, with final yield of 3.7 × 1016 D-T neutrons carrying kinetic energy (KE) of 83.6 kJ, demonstrating Q = 0.01.

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Section: Discussionmentioning

confidence: 99%

Pushing the limits of existing plasma focus towards 10¹⁶ fusion neutrons with Q = 0.01

Lee¹

2022

Plasma Sci. Technol.

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Experimental results of a 330 GW impedance-matched Marx generator

Damideh,

Btaiche,

et al. 2024

Sci Rep

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Impedance-matched Marx generators (IMGs) are considered next generation pulsed-power drivers because of their long lifetime (> 10,000 shots), repetition rate (> 0.1-Hz), fast rise time (~ 100-ns), and high-energy-delivery efficiency (~ 90%). “TITAN” is a 14-stage IMG designed to deliver 1-TW to a 2-Ω matched load. In this paper, design, simulation, and experimental results for six stages of TITAN including its triggering system, air delivery system, and pulse shaping are presented. To achieve efficiency over 85% and maximize the capability of an IMG, synchronized triggering, reduced pre-fire rate, and pulse shaping ability are crucial. In this paper, novel engineering solutions are introduced, tested, and proven to overcome those challenges. 6-stage TITAN, powered by 102 identical bricks and 102 field-distortion-triggered gas switches, could generate ~ 600-kA and ~ 700-kV across a ~ 0.9-Ω matched load when fully charged to ± 100-kV. In these experiments, 6-stage TITAN is tested up to ± 70-kV charge voltage which delivers a peak power of 330-GW to a 1.2-Ω resistive load.

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Experimental results of a 330 GW impedance-matched Marx generator

Damideh,

Btaiche,

et al. 2024

Preprint

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Impedance-Matched Marx Generators (IMGs) are considered next generation pulsed-power drivers because of their long lifetime (> 10,000 shots), repeatability (> 0.1-Hz), fast rise time (~ 100-ns), and high-energy-delivery efficiency (~ 90%). “TITAN” is a 14-stage IMG designed to deliver 1-TW to a 2-Ω matched load. In this paper, design, simulation, and experimental results for six stages of TITAN including its triggering system, air delivery system, and pulse shaping are presented. To achieve efficiency over 85% and maximize the capability of an IMG, synchronized triggering, reduced pre-fire rate, and pulse shaping ability are crucial. In this paper, novel engineering solutions are introduced, tested, and proven to overcome those challenges. 6-stage TITAN, powered by 102 identical bricks and 102 field-distortion-triggered gas switches, could generate ~ 600-kA and ~ 700-kV across a ~ 0.9-Ω matched load when fully charged to +/- 100-kV. In these experiments, 6-stage TITAN is tested up to +/- 70-kV charge voltage which delivers a peak power of 330-GW to a 1.2-Ω resistive load.

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MagLIF: Dynamics and energetics of liner and fuel

Cited by 4 publications

References 32 publications

Pushing the limits of existing plasma focus towards 10¹⁶ fusion neutrons with Q = 0.01

Pushing the limits of existing plasma focus towards 10¹⁶ fusion neutrons with Q = 0.01

Experimental results of a 330 GW impedance-matched Marx generator

Experimental results of a 330 GW impedance-matched Marx generator

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MagLIF: Dynamics and energetics of liner and fuel

Cited by 4 publications

References 32 publications

Pushing the limits of existing plasma focus towards 1016 fusion neutrons with Q = 0.01

Pushing the limits of existing plasma focus towards 1016 fusion neutrons with Q = 0.01

Experimental results of a 330 GW impedance-matched Marx generator

Experimental results of a 330 GW impedance-matched Marx generator

Contact Info

Product

Resources

About

Pushing the limits of existing plasma focus towards 10¹⁶ fusion neutrons with Q = 0.01

Pushing the limits of existing plasma focus towards 10¹⁶ fusion neutrons with Q = 0.01