Current Search: SAEKS, JEFFREY IAN. (x)
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Title
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PROBE MEASUREMENTS IN A LISITANO COIL CREATED, MAGNETICALLY CONFINED HYDROGEN PLASMA.
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Creator
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SAEKS, JEFFREY IAN., Florida Atlantic University
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Abstract/Description
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Hydrogen plasmas were produced in an axially symmetric magnetic field which was nearly uniform in the Lisitano coil region. The field could be converted from a shallow mirror to a deep mirror (R = 44), to a cusp geometry by varying the current ratio in two sets of magnet coils. Unguarded Langmuir probes and a periodic potential probe proved unsatisfactory due to sheath growth. A gridded Langmuir probe measured ion temperature of 26 eV and electron temperature of 9 eV, with ion density 7 to...
Show moreHydrogen plasmas were produced in an axially symmetric magnetic field which was nearly uniform in the Lisitano coil region. The field could be converted from a shallow mirror to a deep mirror (R = 44), to a cusp geometry by varying the current ratio in two sets of magnet coils. Unguarded Langmuir probes and a periodic potential probe proved unsatisfactory due to sheath growth. A gridded Langmuir probe measured ion temperature of 26 eV and electron temperature of 9 eV, with ion density 7 to 10x10^8 cm^-3. The magnetic boundary value problem was solved analytically and comparison with previous experiments at Florida Atlantic University showed the electron temperature to depend on the magnetic field gradient in the Lisitano coil. It was also seen that high voltage (250 V) on the periodic probe was not ionizing neutrals.
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Date Issued
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1978
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PURL
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http://purl.flvc.org/fcla/dt/13905
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Subject Headings
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Hydrodynamics, Plasma probes, Magnetism--Experiments
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Format
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Document (PDF)