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| Format: | Artículo científico |
| Sprache: | en |
| Veröffentlicht: |
Sociedade Brasileira de Física
2004
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| Online-Zugang: | https://www.redalyc.org/articulo.oa?id=46434802 |
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Inhaltsangabe:
- Characterization of a quarter torus filter for vacuum arc ion flux transmission H. Kelly A. Márquez M. Pirrera Física, Astronomía y Matemáticas Measurements on the ion flux transmission in a magnetically filtered d-c vacuum arc are presented. The deviceincludes a metallic plasma-generating chamber with water-cooled electrodes coupled to a substrate chamberthrough a quarter-torus magnetic filter. It is employed a Copper cathode (6 cm in diameter) with a Copperannular anode. The filter consists in a steel cylinder 500 mm length and 100 mm inner diameter with 90o ofbending angle and corrugated lateral walls, surrounded by a magnetic field generating coil. The arc is operatedat a current level of 100 A, and the intensity of the filtering magnetic field was in the range 0-200 G (measuredat the knee of the filter). This magnetic field is enough high so as to magnetize the electrons but not the ions. Thedischarge is ignited by bringing (and later removing) a tungsten striker into contact with the cathode. The arcvoltage drop, the floating potentials of the filter and the plasma, and the ion current collected by probes locatedat different positions as functions of the magnetic field intensity are reported and compared with measurementspresented in the literature with other similar devices. 2004 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46434802 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.4B Vol.34