Experiments on the AMBAL-M Central Solenoid

Akhmetov, T. D.; Bespamyatnov, I.O.; Давыденко, В. И.; Dimov, G. I.; Donin, A. S.; Kovalenko, Yu. V.; Krivenko, A. S.; Parakhin, I. K.; Razorenov, V. V.; Savkin, V. Ya.; Shulzhenko, G. I.; Soldatkina, E. I.

doi:10.13182/fst05-a603

Cited by 2 publications

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“…For this model, the total drop in the ambipolar potential between the center of the device and the end wall is eU w = 5T and the particle flux through the mirror is q = q e = q i = 1.53•n 0 •(T /2πm i ) 1/2 . The energy flux through the mirror is evaluated as 19 • q e • T e ) = 7.89 • q • T . Given the trapped neutral beam power we applied this model to evaluate the electron temperature in the GDT experiment.…”

Section: Bulk Plasma Energy and Particle Lossesmentioning

confidence: 99%

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Gas-dynamic trap: an overview of the concept and experimental results

Ivanov

Prikhodko

2013

Plasma Phys. Control. Fusion

130

118

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A gas dynamic trap (GDT) is a version of a magnetic mirror whose characteristic features are a long mirror-to-mirror distance, which exceeds the effective mean free path of ion scattering into a loss cone, a large mirror ratio (R ∼ 100) and axial symmetry. Under these conditions, the plasma confined in a GDT is isotropic and Maxwellian. The rate at which it is lost out of the ends is governed by a set of simple gas-dynamic equations, hence the name of the device. Plasma magnetohydrodynamic stability is achieved through a plasma outflow through the end mirrors into regions, where the magnetic-field lines' curvature is favorable for this stability. A high flux volumetric neutron source based on a GDT is proposed, which benefits from the high β achievable in magnetic mirrors. Axial symmetry also makes the GDT neutron source more maintainable and reliable, and technically simpler. This review discusses the results of a conceptual design of the GDT-based neutron source for fusion materials development and fission-fusion hybrids. The main physics issues related to plasma confinement and heating in a GDT are addressed by the experiments performed with the GDT device in Novosibirsk. The review concludes by updating the experimental results obtained, a discussion about the limiting factors in the current experiments and a brief description of the design of a future experimental device for more comprehensive modeling of the GDT-based neutron source.

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Section: Bulk Plasma Energy and Particle Lossesmentioning

confidence: 99%

“…Notable examples are the Phaedrus experiment at the University of Wisconsin, USA, which achieved 30% plasma beta using ponderomotive RF stabilization [18] and the AMBAL-U experiment in Novosibirsk in which 30% beta was also achieved with partial line tying to the gas-discharge plasma inside a gun placed at the end wall [19].…”

Section: Introductionmentioning

confidence: 99%