Loading...
Please wait, while we are loading the content...
Similar Documents
A 15,000-hour cyclic endurance test of an 8-centimeter-diameter electron bombardment mercury ion thruster
| Content Provider | Semantic Scholar |
|---|---|
| Author | Nakanishi, Shigeko |
| Copyright Year | 1976 |
| Abstract | A laboratory model 8-cm thruster with improvements to minimize ion chamber erosion and peeling of sputtered metal was subjected to a cyclic endurance test for 15,040 hours and 460 restarts. A charted history of several thruster operating variables and off-normal events are shown in 600-hour segments at three points in the test. The transient behavior of these variables during a typical start-stop cycle is presented. Performance and operating characteristics were nearly constant throughout the test except for a change in the accelerator back-streaming limit. Findings of the post-test inspection confirmed most of the expected results. Charge-exchange ions caused normal accelerator grid erosion. The workability of the various design features have been substantiated, and attainable improvements in propellant utilization efficiency should significantly reduce accelerator erosion. |
| File Format | PDF HTM / HTML |
| DOI | 10.2514/6.1976-1022 |
| Alternate Webpage(s) | https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19770003213.pdf |
| Alternate Webpage(s) | https://doi.org/10.2514/6.1976-1022 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
