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Rev. Sci. Instrum. 44, 726 (1973); http://dx.doi.org/10.1063/1.1686231 (6 pages)
Magnetic Multipole Containment of Large Uniform Collisionless Quiescent Plasmas
(Received 18 December 1972)
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Add to FacebookOver 1200 Alnico magnets (1.3 × 1.3 × 4 cm) are used to contain a conventional discharge plasma produced by 1–20 A of emission from 6–48 small filaments at − 60 V. Densities up to 1012 ions∕cm3 are produced in argon at 2 × 10−3 Torr. At 5 × 10−6 Torr typical parameters are: 8 × 1010 ions∕cm3; ni ∕ n0 ≈ 0.7; Te ≈ 5 eV; Ti ≈ 0.5 eV; noise 〈 δn∕n 〉 ≈ 2 × 10−4; and < 1% nonuniformity over a volume 31 cm diam by 69 cm. Uniform dense plasmas of He, D, and H are also produced. The ion containment appears to be both magnetic and electrostatic.
© 1973 The American Institute of Physics
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T. Ohkawa and M. Yoshikawa, Phys. Fluids 11, 2039 (1968)PFLDAS000011000009002039000001.
M. Sadowski, Rev. Sci. Instrum. 40, 1545 (1969)RSINAK000040000012001545000001.
R. J. Taylor, K. R. MacKenzie, and H. Ikezi, Rev. Sci. Instrum. 43, 1675 (1972)RSINAK000043000011001675000001.
H. Ikezi and R. J. Taylor, J. Appl. Phys. 41, 738 (1970)JAPIAU000041000002000738000001.
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