Evidence of Stabilization in the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="italic">Z</mml:mi></mml:math>-Pinch

Shumlak, U.; Golingo, R.P.; Nelson, B. A.; Hartog, D. J. Den

doi:10.1103/physrevlett.87.205005

Cited by 90 publications

(55 citation statements)

References 10 publications

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“…In higher-S plasmas, Taylor relaxation should be more robust, and other effects outside of standard ideal MHD are surely needed in order to prevent relaxation. We hypothesize that properly driven shear-flows could possibly stabilize the kink, 79,80 as might finite-Larmor radius effects if an energetic neutral beam were injected in the plasma. These hypotheses remain to be tested by experiment and theory.…”

Section: Discussionmentioning

confidence: 99%

Field-reversed configuration formation scheme utilizing a spheromak and solenoid induction

Gerhardt

Белова

et al. 2008

Physics of Plasmas

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A new field-reversed configuration ͑FRC͒ formation technique is described, where a spheromak transitions to a FRC with inductive current drive. The transition is accomplished only in argon and krypton plasmas, where low-n kink modes are suppressed; spheromaks with a lighter majority species, such as neon and helium, either display a terminal tilt-mode, or an n = 2 kink instability, both resulting in discharge termination. The stability of argon and krypton plasmas through the transition is attributed to the rapid magnetic diffusion of the currents that drive the kink-instability. The decay of helicity during the transition is consistent with that expected from resistivity. This observation indicates a new scheme to form a FRC plasma, provided stability to low-n modes is maintained, as well as a unique situation where the FRC is a preferred state.

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Section: Discussionmentioning

confidence: 99%

Field-reversed configuration formation scheme utilizing a spheromak and solenoid induction

Gerhardt

Белова

et al. 2008

Physics of Plasmas

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“…The ZaP experiment (Shumlak et al, 2001(Shumlak et al, , 2003, shown in Fig. 1, produces a hydrogen Z-pinch column (100 cm long and approximately 1 cm radius) with flow velocities on the order of 100-200 km/s (see Table 1 for more information).…”

Section: The Zap Flow Z-pinch Experimentsmentioning

confidence: 99%

Plasma Jet Studies via the Flow Z-Pinch

Shumlak

Nelson

Balick

2006

Astrophys Space Sci

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The ZaP sheared-flow Z-pinch produces high density Z-pinch plasmas that are stable for up to 2000 times the classical instability times. The presence of an embedded radial shear in the axial flow is correlated with the observed stability, and is in agreement with numerical predictions of the stability threshold. The case is made that using a higher-Z working gas will produce supersonic plasma jets, consistent with dimensionless similarity constraints of astrophysical jets. This would allow laboratory testing of some regimes of astrophysical jet theory, computations, and observations.

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“…A number of magnetic confinement fusion concepts including spheromaks, FRCs, Z-pinches and inertial confinement concepts such as pellet implosion are under investigation at various facilities [1][2][3][4]. An important area of recent numerical research in plasma physics has been the development of plasma simulation algorithms with more complete physics including Hall MHD [5][6][7][8][9][10], and the full two-fluid model [11,12].…”

Section: Introductionmentioning

confidence: 99%