Performance and lifetime simulation of ion thruster optics
| dc.contributor.author | Farnell, Cody Coffman, author | |
| dc.contributor.author | Williams, John D., advisor | |
| dc.contributor.author | Wilbur, Paul J., advisor | |
| dc.date.accessioned | 2024-03-13T19:26:15Z | |
| dc.date.available | 2024-03-13T19:26:15Z | |
| dc.date.issued | 2007 | |
| dc.description.abstract | A simulation code, ffx, was developed to study various aspects of ion thruster optics. Information concerning sheaths, impingement limits, perveance, electric potential, charge exchange, and sputtering is covered. Electron backstreaming and pit and groove wear are discussed in detail as two grid failure mechanisms. The code was used to study the effects of several parameters on grid performance and lifetime, including grid spacing, aperture diameter, and grid thickness. An evolutionary algorithm was used with the ffx code to design grid sets, utilizing net accelerating voltage and current density as primary input parameters. Validation of the ffx code was accomplished through comparison to other ion optics codes and to experimental data obtained from both gridlet and full thruster testing. Gridlet test comparisons included simulations of finite aperture grid sets. The NSTAR thruster was studied in detail with regard to lifetime. The methods used for accurate and efficient optics simulation are discussed, including the multigrid method for solving for electric potential. | |
| dc.format.medium | born digital | |
| dc.format.medium | doctoral dissertations | |
| dc.identifier | ETDF_Farnell_2007_3266391.pdf | |
| dc.identifier.uri | https://hdl.handle.net/10217/237719 | |
| dc.language | English | |
| dc.language.iso | eng | |
| dc.publisher | Colorado State University. Libraries | |
| dc.relation.ispartof | 2000-2019 | |
| 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.rights.license | Per the terms of a contractual agreement, all use of this item is limited to the non-commercial use of Colorado State University and its authorized users. | |
| dc.subject | electric propulsion | |
| dc.subject | ion thruster optics | |
| dc.subject | aerospace materials | |
| dc.subject | mechanical engineering | |
| dc.subject | aerospace engineering | |
| dc.title | Performance and lifetime simulation of ion thruster optics | |
| 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 | Mechanical Engineering | |
| thesis.degree.grantor | Colorado State University | |
| thesis.degree.level | Doctoral | |
| thesis.degree.name | Doctor of Philosophy (Ph.D.) |
Files
Original bundle
1 - 1 of 1
Loading...
- Name:
- ETDF_Farnell_2007_3266391.pdf
- Size:
- 6.43 MB
- Format:
- Adobe Portable Document Format