THE EFFECT OF LONGITUDINAL MAGNETIC FIELDS ON THE LINEAR PINCH EFFECT

Journal Article · Wed Apr 01 04:00:00 EST 1959 · Zeitschrift fuer Naturforschung (West Germany) Divided into Z. Nautrforsch., A, and Z. Naturforsch., B: Anorg. Chem., Org. Chem., Biochem., Biophys.,

OSTI ID:4263448

Herold, H; Funfer, E; Lehner, G; Tuczek, H; Andelfinger, C

The influence of stabilizing longitudinal magnetic fields up to 1100 gauss on the linear pinch effect was investigated. The discharges occur in deuterium at pressures from 10/sup -2/ to 10/sup -1/ Torr, at current rises of 6 x 10/sup 11/ amp/sec, and currents of approximately 300 kamp. The longitudinal flux variation within a test loop between current return conductor and discharge container was measured. In addition to a flux variation caused by the longitudiual field trapped in the plasma, a strong flux increase occurred at the moment of the last plasma contraction which is attributed to the (m = 1) instability. The screw sign of this instability is defined by its direction in stability fields over 300 gauss, but it has varying signs at smaller field strengths. With increasing longitudiual fields the occurrence of the instability is displaced from 2.5 ic sec (0 gauss) to 3.7 ic sec (1100 gauss). Correspondingly the number of contractions increases from 2 to 5. The occurrence of the contractions and the instabilities is displaced with incressing pressure to greater time (t , hardness, p 3/11) The decrease of some oscillations in the voltage flow with increasing field leads to the conclusion that the (m = 0) instabilities do not occur in higher fields. Discharges in impure deuterium show a completely different behavior. Only one plasma contraction occurs, and flux and voltage measurements show no reference point for (m = 0) and (m = 1) instabilities. (tr-auth)

• Research Organization: Technische Hochschule, Munich
• NSA Number: NSA-13-013817
• OSTI ID: 4263448
• Journal Information: Zeitschrift fuer Naturforschung (West Germany) Divided into Z. Nautrforsch., A, and Z. Naturforsch., B: Anorg. Chem., Org. Chem., Biochem., Biophys.,, Journal Name: Zeitschrift fuer Naturforschung (West Germany) Divided into Z. Nautrforsch., A, and Z. Naturforsch., B: Anorg. Chem., Org. Chem., Biochem., Biophys., Vol. Vol: 14a; ISSN ZNTFA
• Country of Publication: Country unknown/Code not available
• Language: German

Related Subjects

CONFINEMENT
CURRENTS
DEUTERIUM
ELECTRIC DISCHARGES
ELECTRIC POTENTIAL
IMPURITIES
MEASURED VALUES
OSCILLATIONS
PHYSICS AND MATHEMATICS
PINCH
PLASMA
PRESSURE
STABILITY
TRAPS
VARIATIONS