9 Inertial confinement fusion: z-pinch

Olson, Craig

doi:10.1007/10857629_21

Cited by 4 publications

(3 citation statements)

References 43 publications

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“…This work is part of a single-shot high-yield-fusion assessment for pulsed-power, supported by the US Department of Energy (DOE). A low-mass recyclable transmission line (RTL) concept is being developed parallelly, to extend a single-shot operation to a repetitive operation for inertial fusion energy (IFE) [64,141,142]. The RTL concept shows promise to significantly reduce the difficulties of chamber design and driver target coupling as compared with other ICF approaches.…”

Section: Discussionmentioning

confidence: 99%

“…Laser driven hohlraums are therefore a good match to the smaller, higher temperature systems (300 eV) required for ignition of small diameter capsules (2 mm) of low fusion yields (20 MJ) [21]. The lower cost, larger natural scale size and pulse lengths [58], and larger x-ray energies, make z-pinch driven hohlraums an excellent match to the system requirements for the larger diameter (∼4.6-9.6 mm), higher fusion yield (∼0.2-3 GJ) ICF capsules necessary for IFE [2,88,142]. Ignition on the NIF will validate the science basis for high yield ICF target designs.…”

Section: Discussionmentioning

confidence: 99%

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Progress in symmetric ICF capsule implosions and wire-arrayz-pinch source physics for double-pinch-driven hohlraums

Cuneo

Vesey

Bennett

et al. 2006

Plasma Phys. Control. Fusion

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Over the last several years, rapid progress has been made evaluating the doublez-pinch indirect-drive, inertial confinement fusion (ICF) high-yield target concept (Hammer et al 1999 Phys. Plasmas 6 2129). We have demonstrated efficient coupling of radiation from two wire-array-driven primary hohlraums to a secondary hohlraum that is large enough to drive a high yield ICF capsule. The secondary hohlraum is irradiated from two sides by z-pinches to produce low odd-mode radiation asymmetry. This double-pinch source is driven from a single electrical power feed (Cuneo et al 2002 Phys. Rev. Lett. 88 215004) on the 20 MA Z accelerator. The double z-pinch has imploded ICF capsules with even-mode radiation symmetry of 3.1 ± 1.4% and to high capsule radial convergence ratios of 14-21 (

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Progress in symmetric ICF capsule implosions and wire-arrayz-pinch source physics for double-pinch-driven hohlraums

Cuneo

Vesey

Bennett

et al. 2006

Plasma Phys. Control. Fusion

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“…Commercial application of controlled thermonuclear fusion energy is an ideal approach to solve human energy needs for the future. A fusion-fission hybrid reactor technology based on the Z-pinch technique is one possible way to achieve this goal [1][2][3][4]. As the fundamental and core technology, a high-power repetitive Z-pinch driver requires significant research progress in a relatively short period of time, to provide the necessary experimental platform for fusion target, driver or hybrid reactor development.…”

Section: Introductionmentioning

confidence: 99%

Development of a hybrid mode linear transformer driver stage

Zhang

Wang

Zhou

et al. 2018

Phys. Rev. Accel. Beams

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At present, the mainstream technologies of primary power sources of large pulse power devices adopt Marx or linear transformer driver (LTD) designs. Based on the analysis of the characteristics of these two types of circuit topologies, the concept of a hybrid mode LTD stage based on Marx branches is proposed. The analysis shows that the hybrid mode LTD stage can realize the following goals: (a) to reduce the energy and power handled by the basic components (switch and capacitor) to lengthen their lifetime; (b) to reduce the requirements of the multipath synchronous trigger system; and (c) to improve the maintainability of the LTD stage by using independent Marx generators instead of "traditional LTD bricks." To verify the technique, a hybrid mode LTD stage consisting of 50 branches (four-stage compact Marx generators) was designed, manufactured and tested. The stage has a radius of about 3.3 m and a height of 0.6 m. The single Marx circuit's load current is about 21 kA, with a rise time of ∼90 ns (10%-90%), under the conditions of capacitors charged to AE40 kV and a 6.9 Ω matched load. The whole stage's load current is ∼1 MA, with a rise time of ∼112 ns (10%-90%), when the capacitors are charged to AE45 kV and the matched load is 0.14 Ω.

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Study of the time-resolved, 3-dimensional current density distribution in solid metallic liners at 1 MA

et al. 2016

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We present a study of the time varying current density distribution in solid metallic liner experiments at the 1 MA level. Measurements are taken using an array of magnetic field probes which provide 2D triangulation of the average centroid of the drive current in the load at 3 discrete axial positions. These data are correlated with gated optical self-emission imaging which directly images the breakdown and plasma formation region. Results show that the current density is azimuthally non-uniform and changes significantly throughout the 100 ns experimental timescale. Magnetic field probes show clearly motion of the current density around the liner azimuth over 10 ns timescales. If breakdown is initiated at one azimuthal location, the current density remains non-uniform even over large spatial extents throughout the current drive. The evolution timescales are suggestive of a resistive diffusion process or uneven current distributions among simultaneously formed but discrete plasma conduction paths.

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9 Inertial confinement fusion: z-pinch

Cited by 4 publications

References 43 publications

Progress in symmetric ICF capsule implosions and wire-arrayz-pinch source physics for double-pinch-driven hohlraums

Progress in symmetric ICF capsule implosions and wire-arrayz-pinch source physics for double-pinch-driven hohlraums

Development of a hybrid mode linear transformer driver stage

Study of the time-resolved, 3-dimensional current density distribution in solid metallic liners at 1 MA

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