On the control of the m=2 rotational instability in a high‐field theta pinch

1993 ◽  
Vol 5 (8) ◽  
pp. 3106-3107
Author(s):  
D. O. Campos ◽  
H.‐J. Kunze
Keyword(s):  
High Field ◽  
Rotational Instability ◽  
Theta Pinch

End effects on the n = 2 rotational instability in the reversed-field theta-pinch

1982 ◽  
Vol 22 (6) ◽  
pp. 843-847 ◽  
Author(s):  
Y. Aso ◽  
Ch. Wu ◽  
S. Himeno ◽  
K. Hirano
Keyword(s):  
Rotational Instability ◽  
End Effects ◽  
Theta Pinch ◽  
Reversed Field

Rotational instability in a linear theta pinch

1980 ◽  
Vol 23 (9) ◽  
pp. 1832 ◽  
Author(s):  
C. Ekdahl ◽  
R. R. Bartsch ◽  
R. J. Commisso ◽  
R. F. Gribble ◽  
K. F. McKenna ◽  
...  
Keyword(s):  
Rotational Instability ◽  
Theta Pinch

Plasma losses through an adiabatic cusp

1974 ◽  
Vol 11 (1) ◽  
pp. 77-91 ◽  
Author(s):  
A. S. Kaye
Keyword(s):  
Angular Momentum ◽  
Energy Loss ◽  
Electric Fields ◽  
Loss Rate ◽  
Particle Energy ◽  
Rotational Instability ◽  
Absolute Value ◽  
Theta Pinch ◽  
Maxwellian Plasma ◽  
Plasma Radius

Previous calculations of β = 1 cusp losses are extended to the case where there exists a third ‘adiabatic’ invariant of the particle motion, related to the magnetic moment, and additional to the particle energy and angular momentum. Simple analytic results are obtained for the particle and energy loss rate from a Maxwellian plasma in both plane and axisymmetric geometry, electric fields being assumed zero everywhere. The results are valid for a plasma radius large relative to the ion gyro-radius, in which case the adiabaticity in the sense used reduces the loss rate by a factor ⅔λ⅔ to give an overall scaling as λ–⅔ with external mirror ratio λ. The absolute value is about a factor two less than the previously accepted result (for λ = 1 only) for an axisymmetric cusp. cusp. The enhanced scaling with A arises from the absence of a certain class of particles in the sheath, which must be everywhere adiabatic; its applicability to a simple theta pinch is queried, however. The end loss rate of angular momentum is also obtained, and is non-zero at a point cusp. This is shown to lead to rapid rotational instability in a collisionless theta pinch.

Rotational Instability in the Theta Pinch

1963 ◽  
Vol 6 (9) ◽  
pp. 1338 ◽  
Author(s):  
H. A. B. Bodin ◽  
A. A. Newton
Keyword(s):  
Rotational Instability ◽  
Theta Pinch

Study of segregation in La1.8Sr0.2CuO4 superconductor by STEM-EDS microanalysis

1987 ◽  
Vol 45 ◽  
pp. 54-55
Author(s):  
T. F. Kelly ◽  
P. J. Lee ◽  
E. E. Hellstrom ◽  
D. C. Larbalestier
Keyword(s):  
Rare Earth ◽  
High Field ◽  
Transport Current ◽  
Total Thickness ◽  
New Class ◽  
Ceramic Superconductors ◽  
Current Densities ◽  
Group Ii ◽  
Eds Microanalysis

Recently there has been much excitement over a new class of high Tc (>30 K) ceramic superconductors of the form A1-xBxCuO4-x, where A is a rare earth and B is from Group II. Unfortunately these materials have only been able to support small transport current densities 1-10 A/cm2. It is very desirable to increase these values by 2 to 3 orders of magnitude for useful high field applications. The reason for these small transport currents is as yet unknown. Evidence has, however, been presented for superconducting clusters on a 50-100 nm scale and on a 1-3 μm scale. We therefore planned a detailed TEM and STEM microanalysis study in order to see whether any evidence for the clusters could be seen.A La1.8Sr0.2Cu04 pellet was cut into 1 mm thick slices from which 3 mm discs were cut. The discs were subsequently mechanically ground to 100 μm total thickness and dimpled to 20 μm thickness at the center.

High-field magnetoluminescence of ZnSe quantum wires

1998 ◽  
Vol 184-185 (1-2) ◽  
pp. 339-342 ◽  
Author(s):  
L Parthier
Keyword(s):  
High Field ◽  
Quantum Wires

HIGH FIELD N. M. R. IN Cu(NO3)2 2 1/2 H2O BELOW 1°K

1971 ◽  
Vol 32 (C1) ◽  
pp. C1-943-C1-945
Author(s):  
M. W. van TOL ◽  
M. MATSUURA ◽  
N. J. POULIS
Keyword(s):  
High Field

HIGH FIELD MAGNETISM OF THE INTERMETALLIC COMPOUNDS RAg AND RCu (R = Dy, Tb AND Gd)

1988 ◽  
Vol 49 (C8) ◽  
pp. C8-393-C8-394 ◽  
Author(s):  
S. Miura ◽  
T. Kaneko ◽  
S. Abe ◽  
G. Kido ◽  
H. Yoshida ◽  
...  
Keyword(s):  
Intermetallic Compounds ◽  
High Field
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