| Автор | P G A Theuws |
| Автор | H C W Beijerinck |
| Автор | N F Verster |
| Автор | D C Schram |
| Дата выпуска | 1982-05-01 |
| dc.description | The medium density plasma column (n approximately=10<sup>22</sup> m<sup>-3</sup>) close to the exit of the cathode of a hollow cathode arc is highly ionised, with ion and electron temperatures T<sub>i</sub> approximately=0.5-1.5 eV and T<sub>e</sub> approximately=3 eV, respectively. By sampling this plasma with an orifice in the end anode (at a floating potential) a high intensity beam with a broad velocity distribution is obtained for the noble gas atoms Ne, Ar and Kr, both in the ground state and in metastable states n*. Typical centre-line intensities for argon are I(0)=2*10<sup>18</sup> s<sup>-1</sup> sr<sup>-1</sup>, T=2*10<sup>4</sup>K and I(0)<sub>n*</sub>=2*10<sup>14</sup> s<sup>-1</sup> sr<sup>-1</sup>, T<sub>n*</sub>=3*10<sup>4</sup>K. These values are in good agreement with model calculations of the process of molecular beam sampling, which are discussed in this paper. The source is of a simple design and easy to operate. The life time of the tungsten (or tantalum) hollow cathode is typically 40 h for argon and krypton. The shortest life time is for neon with a tungsten cathode, due to the high operating temperature T approximately=3000K of the cathode tip. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | A hollow cathode arc as a high intensity beam source for ground state and metastable noble gas atoms in the eV translational energy range |
| Тип | paper |
| DOI | 10.1088/0022-3735/15/5/023 |
| Print ISSN | 0022-3735 |
| Журнал | Journal of Physics E: Scientific Instruments |
| Том | 15 |
| Первая страница | 573 |
| Последняя страница | 579 |
| Аффилиация | P G A Theuws; Phys. Dept., Eindhoven Univ. of Technol., Eindhoven, Netherlands |
| Аффилиация | H C W Beijerinck; Phys. Dept., Eindhoven Univ. of Technol., Eindhoven, Netherlands |
| Аффилиация | N F Verster; Phys. Dept., Eindhoven Univ. of Technol., Eindhoven, Netherlands |
| Аффилиация | D C Schram; Phys. Dept., Eindhoven Univ. of Technol., Eindhoven, Netherlands |
| Выпуск | 5 |
