Experimental Demonstration of the Stabilizing Effect of Dielectric Coatings on Magnetically Accelerated Imploding Metallic Liners

Awe, T. J.; Peterson, Kyle; Yu, Edmund; McBride, R. D.; Sinars, Daniel Brian; Gómez, M. R.; Jennings, Christopher; Martin, Matthew; Rosenthal, S.E.; Schroen, D. G.; Sefkow, A. B.; Slutz, Stephen A.; Tomlinson, Kurt; Vesey, R. A.

doi:10.1103/physrevlett.116.065001

Cited by 83 publications

(26 citation statements)

References 38 publications

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“…As such, most targets employ liner coatings that satisfy this aspect ratio to improve target compression and heating. Additional methods to reduce the Rayleigh-Taylor instability have also been investigated, including the use of thin dielectric coatings over metallic liners [19], which appears to significantly improve converging target uniformity. While not evaluated in this study, dielectric coating of metallic liners can be incorporated into future, more detailed models and remains an area for later investigation.…”

Section: Fig 3 Standard Fusion Reactions Energy Release and Cross mentioning

confidence: 99%

“…In each case a copious amount of neutrons are produced, approximately 5.8x10 19 neutrons in the case of the Li lined target and 5.4x10 19 neutrons for the Be lined target. The energy carried by these neutrons is 1.3x10 8 and 1.2x10 8 J, respectively, representing a significant deposition of energy into the surrounding structure during each pulse.…”

Section: Fig 26 Cumulative Neutron Production With Timementioning

confidence: 99%

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Preliminary Analysis of the Gradient Field Imploding Liner Fusion Propulsion Concept

LaPointe

Cassibry

Adams

et al. 2018

2018 Joint Propulsion Conference

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The advancement of human deep space exploration requires the continued development of energetic inspace propulsion systems, advancing from current chemical engines to nuclear thermal rockets to future high energy concepts such as nuclear fusion. This paper presents the initial results of a NASA Innovative Advanced Concepts (NIAC) Phase I study funded to investigate the feasibility of a new pulsed fusion propulsion concept based on the rapid implosion of a fuel target injected at high velocity into a strong stationary magnetic field. The proposed concept takes advantage of the significant advances in terrestrial magneto-inertial fusion designs while attempting to mitigate the most common engineering impediments to in-space propulsion applications. A semi-analytic numerical model used to estimate target compression physics and energy release is presented, leading to estimates for engine performance. A preliminary vehicle design concept is outlined, and representative trajectory analyses for rapid Mars and Saturn missions are provided. The paper concludes with an overview of proposed next steps for theoretical and experimental validation of the concept.

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Section: Fig 3 Standard Fusion Reactions Energy Release and Cross mentioning

confidence: 99%

Section: Fig 26 Cumulative Neutron Production With Timementioning

confidence: 99%

Preliminary Analysis of the Gradient Field Imploding Liner Fusion Propulsion Concept

LaPointe

Cassibry

Adams

et al. 2018

2018 Joint Propulsion Conference

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“…2012 年, 圣地亚国家实验室 [46] [46] . 圣地亚国家实验室 [47][48][49][50] 针对内爆压缩过程中金属套筒的瑞利 -泰勒不稳定性问题进行了大量的研究. 2010 年, 通过 Z 装置, 使用 20 MA, 100 ns 的脉冲电流驱动铝套筒, 研究了表面波长 20-400 µm 的图 7 (网络版彩图) MagLIF 装置聚变原理示意图 [45] Figure 7 (Color online) Schematic of the three critical components of the MagLIF concept [45].…”

Section: 圣地亚国家实验室的磁化套筒聚变unclassified

“…同时, 高分辨率的图像显示磁化套筒在收缩比为 6.9 时, 内表面依然保持了很好的均匀性. 最近, 通过在磁化套筒表面添加 70 µm 的绝缘涂层, 抑制了电热不稳定性的发展, 在 20 倍收缩比的铍套筒中展示了前所未有的表面均匀性 [50] .…”

Section: -8unclassified

Magneto-inertial fusion: A new approach towards fusion energy

Yang¹,

Li²

2016

Sci. Sin.-Phys. Mech. Astron.

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Magnetic confinement fusion (MCF) and inertial confinement fusion (ICF) are two typical approaches of controlled fusion. The energy gain of magnetic confinement fusion achieved unity already, and inertial confinement fusion also made a big progress recently. However, the parameter spaces of two methods are different with 11 magnitudes, and their facilities are very large with fancy cost. Magneto-inertial fusion (MIF) combines both features of MCF and ICF, whose parameter space intermediates between the two extremes of MCF and ICF. The capital cost of MIF is much lower than either of the two, and it has large potential for commercial applications. With advantages of low cost, compact facility, and short time of construction, MIF draws more and more attention recently. In this paper, the status and recent progress of MIF research will be introduced. magneto inertial fusion, magnetized target fusion, field reversed configuration

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“…times more resistive than aluminum, current is expected to flow almost entirely in the aluminum [49,50]. The stratified ETI is not expected to grow in dielectrics [29,31], so observable strata confirm that the current flows in the aluminum. Since Parylene-N has a bulk dielectric strength (235 MV m) [51] approximately one hundred times greater than the maximum electric field in the experiment (2.1 − 2.4 MV m, calculated via circuit modeling and MHD simulations [35]), bulk dielectric breakdown is not expected.…”

mentioning

confidence: 99%

Experimental observation of the stratified electrothermal instability on aluminum with thickness greater than a skin depth

et al. 2018

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A direct observation of the stratified electrothermal instability on the surface of thick metal is reported. Aluminum rods coated with 70μm Parylene-N were driven to 1 MA in 100ns, with the metal thicker than the skin depth. The dielectric coating suppressed plasma formation, enabling persistent observation of discrete azimuthally correlated stratified thermal perturbations perpendicular to the current whose wave numbers, k, grew exponentially with rate γ(k)=0.06ns^{-1}-(0.4ns^{-1}μm^{2}rad^{-2})k^{2} in ∼1g/cm^{3}, ∼7000K aluminum.

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Experimental Demonstration of the Stabilizing Effect of Dielectric Coatings on Magnetically Accelerated Imploding Metallic Liners

Cited by 83 publications

References 38 publications

Preliminary Analysis of the Gradient Field Imploding Liner Fusion Propulsion Concept

Preliminary Analysis of the Gradient Field Imploding Liner Fusion Propulsion Concept

Magneto-inertial fusion: A new approach towards fusion energy

Experimental observation of the stratified electrothermal instability on aluminum with thickness greater than a skin depth

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