Convectively stable pressure profile in magnetic confinement systems with internal rings

Journal Article · Tue Jun 15 04:00:00 EDT 2010 · Plasma Physics Reports

DOI:https://doi.org/10.1134/S1063780X10060036· OSTI ID:21443515

Tsventoukh, M M ^[1]

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1. Russian Academy of Sciences, Lebedev Physical Institute (Russian Federation)

A convectively stable pressure profile in a long multiple-mirror (corrugated) magnetic confinement system with internal current-carrying rings is calculated. The plasma energy content in the axial region can be increased by using an internal ring that reverses the on-axis magnetic field direction and gives rise to an average magnetic well near the axis. The pressure profile in the outer region-outside the magnetic well-is considered in detail. It is shown that, in the radial pressure profile, a pedestal can be formed that leads to a higher pressure drop between the center and the plasma edge. The pressure profile is calculated from the Kruskal-Oberman criterion-a necessary and sufficient condition for the convective stability of a collisionless plasma. The revealed pedestal arises near the boundary of the average magnetic well in the region of the smallest but alternating-sign curvature of the magnetic field lines due to a break in the convectively stable pressure profile. Such a shape of the stable pressure profile can be attributed to the stabilizing effect of the alternating-sign curvature of the field lines in the multiple-mirror magnetic confinement systems under consideration.

• OSTI ID: 21443515
• Journal Information: Plasma Physics Reports, Journal Name: Plasma Physics Reports Journal Issue: 6 Vol. 36; ISSN PPHREM; ISSN 1063-780X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CLOSED CONFIGURATIONS
COLLISIONLESS PLASMA
CONFINEMENT
MAGNETIC CONFINEMENT
MAGNETIC FIELD CONFIGURATIONS
MAGNETIC MIRRORS
MINIMUM AVERAGE-B CONFIGURATIONS
MINIMUM-B CONFIGURATIONS
OPEN CONFIGURATIONS
OPEN PLASMA DEVICES
PLASMA
PLASMA CONFINEMENT
PRESSURE DROP
RINGS
THERMONUCLEAR DEVICES