Ion extraction from a plasma
| dc.contributor.author | Aston, Graeme, author | |
| dc.contributor.author | Kaufman, Harold R., advisor | |
| dc.contributor.author | Wilbur, Paul J., advisor | |
| dc.contributor.author | Fairbank, William M., Jr., committee member | |
| dc.contributor.author | Sites, James R., committee member | |
| dc.date.accessioned | 2007-01-03T06:27:56Z | |
| dc.date.available | 2007-01-03T06:27:56Z | |
| dc.date.issued | 1980 | |
| dc.description.abstract | An experimental investigation of the physical processes governing ion extraction from a plasma is presented. The screen hole plasma sheath of a multi-aperture ion accelerator system is defined by equipotential plots for a variety of accelerator system geometries and operating conditions. A sheath thickness of at least fifteen Debye lengths is shown to be typical. The electron density variation within the sheath satisfies a Maxwell-Boltzmann density distribution at an effective electron temperature dependent on the discharge plasma primary-to-Maxwellian electron density ratio. Plasma ion flow up to and through the sheath is predominately one dimensional and the ions enter the sheath with a modified Bohm velocity. Low values of the screen grid thickness to screen hole diameter ratio give good ion focusing and high extracted ion currents because of the effect of screen webbing on ion focusing. | |
| dc.format.medium | doctoral dissertations | |
| dc.identifier | 1980_Spring_Aston_Graeme.pdf | |
| dc.identifier | ETDF1980400023PHYS | |
| dc.identifier.uri | http://hdl.handle.net/10217/81414 | |
| dc.language | English | |
| dc.language.iso | eng | |
| dc.publisher | Colorado State University. Libraries | |
| dc.relation | Catalog record number (MMS ID): 991003201849703361 | |
| dc.relation | QC718.4.A78 | |
| dc.relation.ispartof | 1980-1999 | |
| dc.rights | Copyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright. | |
| dc.subject.lcsh | Plasma (Ionized gases) | |
| dc.subject.lcsh | Ions | |
| dc.title | Ion extraction from a plasma | |
| dc.type | Text | |
| dcterms.rights.dpla | This Item is protected by copyright and/or related rights (https://rightsstatements.org/vocab/InC/1.0/). You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). | |
| thesis.degree.discipline | Physics | |
| thesis.degree.grantor | Colorado State University | |
| thesis.degree.level | Doctoral | |
| thesis.degree.name | Doctor of Philosophy (Ph.D.) |
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