High-Vacuum Condenser Design: Experimental Effects from Cesium and Mercury Ion Beams
Overview & Synopsis
Effects of variable-energy electrostatic rocket-engine ion exhaust beams that pertain to the design of high-vacuum condensers are discussed. Three ion-engine beam sources, using cesium and mercury as propellants, were operated at energy levels of 200 to 9000 electron volts and currents of 0.002 to 0.200 ampere. Five condenser geometries, having surface areas from 0.287 to 5.76 square meters, were tested. Values for a function of the accommodation and condensation coefficients, which appears in an existing theoretical analysis, were determined. Although exhibiting rather wide variations in some tests, the values were estimated at approximately 0.15 for cesium and 0.015 for mercury. A method of estimating condenser surface area requirements is given.
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Document Information
| Document Title | High-Vacuum Condenser Design: Experimental Effects from Cesium and Mercury Ion Beams |
|---|---|
| Author / Organization | Richley, Edward A., Cybulski, Ronald J. |
| Subject & Discipline | OTHER |
| Categories | Aerospace & Aviation |
| Publication Year | 2019 |
| License / Rights | Public Domain / NASA STI Open Access |
| Resource Verification | Listed PDF (Verification Pending) |
| Original Host Website |
NASA Technical Reports Server
(ntrs.nasa.gov)
|
| File Format | application/pdf (Portable Document Format) |
| Language | EN |
| Catalog ID | DOC-69092 |
| Original Source Link | Visit Source Page on ntrs.nasa.gov » |