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A 13000-hour test of a mercury hollow cathode
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Rawlin, V. K. |
| Copyright Year | 1973 |
| Description | A mercury-fed hollow cathode was tested for 12,979 hours in a bell jar at SERT 2 neutralizer operating conditions. The net electron current drawn to a collector was 0.25 ampere at average collector voltages between 21.8 and 36.7 volts. The mercury flow rate was varied from 5.6 to 30.8 equivalent milliamperes to give stable operation at the desired electrode voltages and currents. Variations with time in the neutralizer discharge characteristics were observed and hypothesized to be related to changes in the cathode orifice dimensions and the availability of electron emissive material. A facility failure caused abnormal test conditions for the last 876 hours and led to the cathode heater failure which concluded the test. |
| File Size | 2697996 |
| Page Count | 23 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19730016066 |
| Archival Resource Key | ark:/13960/t5gb6vp6f |
| Language | English |
| Publisher Date | 1973-06-01 |
| Access Restriction | Open |
| Subject Keyword | Propulsion Systems Electric Potential Hollow Cathodes Neutralizers Sert 2 Spacecraft Mercury Metal Electric Current Electrons Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
