Negative lithium emission from a tungsten surface in a plasma
Abstract
Three possibilities for making Li(-) ions were considered: electron capture in a suitable gas or vapor, extraction from a lithium plasma, and production on a low work function surface in a plasma. The only quantitative results, so far, are for electron capture, with the highest yield being about 5% for Li(+) in Cs vapor at 5 keV. Of the other two methods, some Li(-) was produced in the volume of a plasma. The observation of Li(-) from a surface in a He-Li plasma is reported.
- Publication:
-
Presented at the 31st Natl. Vacuum Symp
- Pub Date:
- October 1984
- Bibcode:
- 1984avs..sympQ...3S
- Keywords:
-
- Electron Capture;
- Lithium;
- Metal Ions;
- Negative Ions;
- Plasmas (Physics);
- Tungsten;
- Cesium;
- Helium Plasma;
- Ion Sources;
- Metal Vapors;
- Metallic Plasmas;
- Surface Reactions;
- Plasma Physics