You are here

FAU Collections » FAU Research Repository » FAU Theses and Dissertations

PROBE MEASUREMENTS IN A LISITANO COIL CREATED, MAGNETICALLY CONFINED HYDROGEN PLASMA

Download pdf | Full Screen View

Date Issued:
1978
Summary:
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 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.
Title: PROBE MEASUREMENTS IN A LISITANO COIL CREATED, MAGNETICALLY CONFINED HYDROGEN PLASMA.
96 views
23 downloads
Name(s): SAEKS, JEFFREY IAN.
Florida Atlantic University, Degree grantor
Type of Resource: text
Genre: Electronic Thesis Or Dissertation
Issuance: monographic
Date Issued: 1978
Publisher: Florida Atlantic University
Place of Publication: Boca Raton, Fla.
Physical Form: application/pdf
Extent: 82 p.
Language(s): English
Summary: 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 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.
Identifier: 13905 (digitool), FADT13905 (IID), fau:10731 (fedora)
Collection: FAU Electronic Theses and Dissertations Collection
Note(s): Thesis (M.S.)--Florida Atlantic University, 1978.
Charles E. Schmidt College of Science
Subject(s): Hydrodynamics
Plasma probes
Magnetism--Experiments
Held by: Florida Atlantic University Libraries
Persistent Link to This Record: http://purl.flvc.org/fcla/dt/13905
Sublocation: Digital Library
Use and Reproduction: Copyright © is held by the author with permission granted to Florida Atlantic University to digitize, archive and distribute this item for non-profit research and educational purposes. Any reuse of this item in excess of fair use or other copyright exemptions requires permission of the copyright holder.
Use and Reproduction: http://rightsstatements.org/vocab/InC/1.0/
Host Institution: FAU
Is Part of Series: Florida Atlantic University Digital Library Collections.