| Автор | C Trager-Cowan |
| Автор | R B Miller |
| Автор | S M Kay |
| Автор | D W O Heddle |
| Дата выпуска | 1990-08-01 |
| dc.description | For pt.I see ibid., vol.1, no.8, p.738-46 (1990). The authors have constructed a cylindrical electrostatic lens using 31 discs, spaced at 0.1 diameter, mounted between two cylinders and have studied its focusing characteristics by both calculation and measurement. They apply potentials V<sub>1</sub> and V<sub>3</sub> to the cylinders, V<sub>2</sub> to a group of contiguous discs, and potentials intermediate between V<sub>1</sub> and V<sub>2</sub> and between V<sub>2</sub> and V<sub>3</sub>, to the discs between the cylinders and the contiguous group. This potential distribution differs from that used in calculations by Read and the authors make a detailed comparison of the available ranges of magnification and the spherical aberration coefficients of these two lens systems. The problems of the practical operation of multi-element lenses of this type suggest that they have limited application. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Multiple-element electrostatic lenses: II. A multiple disc lens |
| Тип | paper |
| DOI | 10.1088/0957-0233/1/8/013 |
| Electronic ISSN | 1361-6501 |
| Print ISSN | 0957-0233 |
| Журнал | Measurement Science and Technology |
| Том | 1 |
| Первая страница | 747 |
| Последняя страница | 750 |
| Аффилиация | C Trager-Cowan; Dept. of Phys., R. Holloway & Bedford New Coll., London Univ., Egham, UK |
| Аффилиация | R B Miller; Dept. of Phys., R. Holloway & Bedford New Coll., London Univ., Egham, UK |
| Аффилиация | S M Kay; Dept. of Phys., R. Holloway & Bedford New Coll., London Univ., Egham, UK |
| Аффилиация | D W O Heddle; Dept. of Phys., R. Holloway & Bedford New Coll., London Univ., Egham, UK |
| Выпуск | 8 |
