Magnetically insulated and inertially confined fusion — MICF

Hasegawa, Akira; Nishihara, Katsunobu; Daido, Hiroyuki; Fujita, Masayuki; Ishizaki, R.; Miki, F.; Mima, Kunioki; Murakami, M.; Nakai, S.; Terai, Kiyoshi; Yamanaka, Chiyoe

doi:10.1088/0029-5515/28/3/003

Cited by 33 publications

(13 citation statements)

References 23 publications

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“…[1][2][3][4][5][6] In the magnetized target, the transport of heat and energetic fusion alpha particles is greatly reduced. The conventional magnetoinertial fusion method uses an imploding solid metal liner in cylindrical or spherical geometry to adiabatically compress a preformed magnetized plasma target.…”

Section: Introductionmentioning

confidence: 99%

Spherically symmetric simulation of plasma liner driven magnetoinertial fusion

Samulyak

Parks

2010

Physics of Plasmas

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Spherically symmetric simulations of the implosion of plasma liners and compression of plasma targets in the concept of the plasma jet driven magnetoinertial fusion have been performed using the method of front tracking. The cases of single deuterium and xenon liners and double layer deuterium-xenon liners compressing various deuterium-tritium targets have been investigated, optimized for maximum fusion energy gains, and compared with theoretical predictions and scaling laws of [P. Parks, Phys. Plasmas 15, 062506 (2008)]. In agreement with the theory, the fusion gain was significantly below unity for deuterium-tritium targets compressed by Mach 60 deuterium liners. The most optimal setup for a given chamber size contained a target with the initial radius of 20 cm compressed by a 10 cm thick, Mach 60 xenon liner, achieving a fusion energy gain of 10 with 10 GJ fusion yield. Simulations also showed that composite deuterium-xenon liners reduce the energy gain due to lower target compression rates. The effect of heating of targets by alpha particles on the fusion energy gain has also been investigated.

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Section: Introductionmentioning

confidence: 99%

Spherically symmetric simulation of plasma liner driven magnetoinertial fusion

Samulyak

Parks

2010

Physics of Plasmas

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“…(2) -(4) that are applicable to the hydrogen propellant are The results are given in Table 3 Table 3 The variation of I~p with mass flow rate for different maximum wall heat fluxes is shown in Fig. (3). We see that if there is no limit on q~., then Isp increases as the flow rate decreases until a maximum of 4800 s is reached.…”

Section: Table 2 Gcr Heat Transfer Input Parametersmentioning

confidence: 98%

Fission or fusion for Mars missions

Kammash¹

1994

Acta Astronautica

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“…[1][2][3][4][5] The conventional MTF method uses an imploding solid metal liner [2][3][4][5] in cylindrical or spherical geometry to adiabatically compress a preformed magnetized plasma target. Plasmoid targets envisaged are compact toroids ͑CTs͒ having nested magnetic flux surfaces, such as, spheromaks and field reversed configurations ͑FRCs͒, or linear targets, such as a Z pinch.…”

Section: Introduction and Concept Descriptionmentioning

confidence: 99%

On the efficacy of imploding plasma liners for magnetized fusion target compression

Parks

2008

Physics of Plasmas

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A new theoretical model is formulated to study the idea of merging a spherical array of converging plasma jets to form a “plasma liner” that further converges to compress a magnetized plasma target to fusion conditions [Y. C. F. Thio et al., “Magnetized target fusion in a spheroidal geometry with standoff drivers,” Current Trends in International Fusion Research II, edited by E. Panarella (National Research Council Canada, Ottawa, Canada, 1999)]. For a spherically imploding plasma liner shell with high initial Mach number (M=liner speed/sound speed) the rise in liner density with decreasing radius r goes as ρ∼1∕r2, for any constant adiabatic index γ=dlnp∕dlnρ. Accordingly, spherical convergence amplifies the ram pressure of the liner on target by the factor A∼C2, indicating strong coupling to its radial convergence C=rm∕R, where rm(R)=jet merging radius (compressed target radius), and A=compressed target pressure/initial liner ram pressure. Deuterium-tritium (DT) plasma liners with initial velocity ∼100km∕s and γ=5∕3, need to be hypersonic M∼60 and thus cold in order to realize values of A∼104 necessary for target ignition. For optically thick DT liners, T<2eV, n>1019–1020cm−3, blackbody radiative cooling is appreciable and may counteract compressional heating during the later stages of the implosion. The fluid then behaves as if the adiabatic index were depressed below 5∕3, which in turn means that the same amplification A=1.6×104 can be accomplished with a reduced initial Mach number M≈12.7(γ−0.3)4.86, valid in the range (10<M<60). Analytical calculations indicate that the hydrodynamic efficiency for plasma liners assembled by current and anticipated plasma jets is <4%. A new similarity model for fusion α-particle heating of the collapsed liner indicates that “spark” ignition of the DT liner fuel does not appear to be possible for magnetized fusion targets with typical threshold values of areal density ρR<0.02gcm−2.

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Magnetically insulated and inertially confined fusion — MICF

Cited by 33 publications

References 23 publications

Spherically symmetric simulation of plasma liner driven magnetoinertial fusion

Spherically symmetric simulation of plasma liner driven magnetoinertial fusion

Fission or fusion for Mars missions

On the efficacy of imploding plasma liners for magnetized fusion target compression

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