Experimental and Theoretical Studies on Filling a Stel a Rator with Laser-Produced Plasma

Saito, Hirobumi; Sato, Kohnosuke; Sekiguchi, Tadashi

doi:10.1109/tps.1981.4317425

IEEE Trans. Plasma Sci.

1981

DOI: 10.1109/tps.1981.4317425

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Experimental and Theoretical Studies on Filling a Stel a Rator with Laser-Produced Plasma

Hirobumi Saito

Kohnosuke Sato

Tadashi Sekiguchi

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1982

1988

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Cited by 5 publications

(1 citation statement)

References 26 publications

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“…In SHATLET-M experiments, plasma is produced by high-power CO2 laser light which is irradiated on an isolated deutrium pellet dropped almost freely from above. This is an attractive technique for producing currentless plasma independently of the magnetic field strength (SATO et al, 1977;BRAUMHACKER et al, 1980;WALKER et al, 1981 ; SAITO et al, 1981).…”

mentioning

confidence: 99%

Construction and vacuum-magnetic-surface measurement of modular-coil torsatron/heliotron device, SHATLET-M

Ohsaki¹,

Kogoshi²,

Iida³

et al. 1988

Plasma Phys. Control. Fusion

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A small modular-coil torsatron/heliotron device SHATLET-M, has been designed and constructed, and its vacuum magnetic surfaces were measured. The machine has an 1 = 2; m = 12 equivalent helical winding with a major radius of 42 cm and a minor radius of 9.6 cm. It also has vertical field coils. The helical winding comprises twelve identical one-turn modular coils designed on the basis of the windback method. These coils have been energized by pulse currents with a rise time of 0.74 or 1.8 ms and a decay time constant of2.7 or 22 ms, respectively, allowing the effects of eddy currents in the surrounding metallic bodies to be investigated. By the magnetic surface measurement with electron-beam probes, the average radius of the outermost magnetic surface observed is found to be about 3 cm. The rotational transform i near the magnetic axis can be varied from 0.47 to 0.59> so that the presence and the location of 1 = 112 surface can be controlled. The vertical field experimentally required to obtain a specified 1 value on the axis agrees with that from numerical calculation including the error field produced by feeder bar currents. The eddy currents induced in the vacuum chamber and the coil supports are found to cause the vertical and horizontal shift of magnetic surfaces. The influence of error fields due to various causes on magnetic island formation is investigated by the numerical calculations. The earth field and the error fields caused by feeder bar currents and by coil misalignment produce large islands around the I = 1/2 surface when it is present.

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mentioning

confidence: 99%

Construction and vacuum-magnetic-surface measurement of modular-coil torsatron/heliotron device, SHATLET-M

Ohsaki¹,

Kogoshi²,

Iida³

et al. 1988

Plasma Phys. Control. Fusion

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show abstract

I.1.2. Heliotron/Stellarator

Iiyoshi

1983

J Fusion Energ

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Retardation of Artificial Plasma Streams Ejected into the Magnetosphere Due to Wave Excitation

Saito

1984

IEEE Trans. Plasma Sci.

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Experimental and Theoretical Studies on Filling a Stel a Rator with Laser-Produced Plasma

Cited by 5 publications

References 26 publications

Construction and vacuum-magnetic-surface measurement of modular-coil torsatron/heliotron device, SHATLET-M

Construction and vacuum-magnetic-surface measurement of modular-coil torsatron/heliotron device, SHATLET-M

I.1.2. Heliotron/Stellarator

Retardation of Artificial Plasma Streams Ejected into the Magnetosphere Due to Wave Excitation

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