The role of anomalous resistivities in Plasma Focus discharges

• Autorzy: Bruzzone H.
• Konferencja: International Workshop on Dense Magnetised Plasmas IWDMP’2000 (12-14.10.2000 ; Kudowa Zdrój, Poland)
• Języki publikacji: EN

Abstrakty

EN

The existence of plasma microturbulence in Plasma Focus (PF) devices is a widely accepted fact within the PF community. This microturbulence must be generated as a final stage of microscopic instabilities, which could develop during certain phases of the plasma evolution. Among the candidate instabilities to occur in these devices, the lower hybrid drift instability is the one with better possibilities, because its triggering condition (electron drift velocity approaching ion thermal velocity) has reasonable chances to be fulfilled. The main effect of the development of this instability is the modification of the collision frequencies in the plasma, which adds an anomalous term to the plasma resistivity. The theory for evaluating this extra term exists, and has been already used in PF 1D numerical simulations and in Z-pinch calculations. The role of this anomalous resistivity in PF behaviour has been the subject of considerable speculations. In this work, a 1D MHD (magnetohydrodynamics) calculation of the pinch stage in a PF device will be presented, including anomalous resistivity effects and their influence on electric fields and the discharge current are discussed.

Słowa kluczowe

EN

anomalous resistivity; pinches; plasma focus

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2001
• Tom: Vol. 46, suppl. 1
• Strony: 3--7
• Opis fizyczny: Bibliogr. 9 poz., rys.

Twórcy

autor

Bruzzone H.

• ADEP, Facultad de Ciencias Exactas y Naturales, Universidad de Mar del Plata y Pladema, Funes 3350, 7600 Mar del Plata, Argentina, Tel.: + 54223/ 4752426 ext. 457, Fax: [phone]

Bibliografia

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• 3. Bruzzone H, Bernal L (2001) Anomalous resistivities due to lower hybrid instabilities in plasma-magnetic field interfaces. Nukleonika 46;2 (in press)
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