| Автор | J D Verhoeven |
| Автор | E D Gibson |
| Дата выпуска | 1976-01-01 |
| dc.description | The brightness of the lanthanum hexaboride, LaB<sub>6</sub>, cathode electron gun of the Stereoscan S-4 scanning electron microscope has been evaluated. This gun is an indirectly heated Broers type of LaB<sub>6</sub> gun design, and the several variables which affect its brightness have been evaluated using a cage device for the brightness measurements. The results indicate that when proper operating conditions are employed the LaB<sub>6</sub> brightnesses are of the order of 15 to 20 times that of tungsten operated at 40 h life conditions, and that single crystal cathodes are more reliable for producing high brightnesses. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Evaluation of a LaB<sub>6</sub> cathode electron gun |
| Тип | paper |
| DOI | 10.1088/0022-3735/9/1/021 |
| Print ISSN | 0022-3735 |
| Журнал | Journal of Physics E: Scientific Instruments |
| Том | 9 |
| Первая страница | 65 |
| Последняя страница | 69 |
| Аффилиация | J D Verhoeven; Dept. of Materials Sci. & Engng., Iowa State Univ., Ames, IA, USA |
| Аффилиация | E D Gibson; Dept. of Materials Sci. & Engng., Iowa State Univ., Ames, IA, USA |
| Выпуск | 1 |
