An experimental study of a neutral point in a plasma

Bratenahl, A.; Hirsch, W. C.

doi:10.2514/6.1966-152

Cited by 7 publications

(10 citation statements)

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“…We can then introduce the isotropic ion and electron temperatures Tj and T e and write Uj = f kT { , U e = I kT e and p = p, + p e = nk (Tj + T e ) = f nU with good approximation. It is then also convenient to use expressions (26) and (27) in the balance equations (30) - (32), and to write div^ = Vp + divl and f: vv* = p divv* + % :VV\…”

Section: 2 the Plasma Fluid Equationsmentioning

confidence: 99%

Rotating Plasmas

1971

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A review is given of theoretical and experimental investigations on rotating plasmas. The basic equations are discussed from the microscopic and macroscopic points of view, including the balance of matter, momentum, and heat, as well as associated stability problems and limiting effects. Various types of devices are described, and obtained experimental results are compared with theoretical predictions. The review also summarizes the applications of rotating plasmas to fusion research, cosmical physics, and special technical arrangements such as plasma centrifuges, adjustable plasma condensers, and plasma gun and propulsion systems.

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Section: 2 the Plasma Fluid Equationsmentioning

confidence: 99%

Rotating Plasmas

1971

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“…As noted previously, testing the validity of the field flattening assumption became a primary objective of the DIPD experiments, and according to preliminary reports (Bratenahl & Hirsch 1966; see also Hess 1968) the field flattening, neutral sheet and boundary layer concepts appeared to have been confirmed. However, with more complete information this earlier conclusion proved completely false (BY).…”

Section: Critique Of Traditional Approachmentioning

confidence: 72%

Impulsive Flux Transfer Events and Solar Flares

Bratenahl

Baum

1976

Geophysical Journal International

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Experimental and theoretical aspects of the fundamental process of magnetic flux transfer (' field line reconnection ') are reviewed. Explosively rapid events are observed in a laboratory magnetoplasma device designed to test certain aspects of neutral point theories of the solar flare mechanism. In these events, ultra-fast release of magnetic energy through reconnection of field lines is effected by a conduction mode instability in which an abrupt upward transition to anomalous resistivity takes place in the neighbourhood of the X-point. The events are triggered when the X-point current density exceeds the conduction mode instability threshold. The energy that is released is that which is associated with the induced current system that supports field line reconnection under ordinary quiescent conditions. Many characteristics of the laboratory events and their associated phenomena, when appropriately scaled, show remarkable agreement with corresponding flare observational data. Some new directions for further development of flare theory are therefore recommended. These experiments indicate that a number of assumptions commonly made in theoretical analysis of the reconnection process are inappropriate. The flux transfer process can be well understood theoretically in terms of a simple circuit analogue which models the laboratory process.

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“…The first preliminary results of the DIPD program were reported in 1965 (Bratenahl and Hirsch, 1966). In 1969, the project was moved from JPL to UC Riverside and there the work continued until 1980.…”

Section: Reconnection Experimentsmentioning

confidence: 99%

Laboratory Experiments on Reconnection in Current Sheets

Bratenahl

Baum

1985

Symp. - Int. Astron. Union

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Laboratory reconnection experiments dedicated to problems of space and astrophysics are briefly reviewed with the purpose of demonstrating that such experiments can provide important insights of considerable value to the development of reconnection theory. Moreover, many of these insights are of a kind not likely to be perceived either when working directly with space observations or while pursuing a course of pure theoretical reasoning without reference to laboratory results.

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An experimental study of a neutral point in a plasma

Cited by 7 publications

References 0 publications

Rotating Plasmas

Rotating Plasmas

Impulsive Flux Transfer Events and Solar Flares

Laboratory Experiments on Reconnection in Current Sheets

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