Abstract
Reliable diagnostics of the plasma potential is one of the most important challenges in context with the production, control and confinement of a plasma. Emissive probes are readily available as direct diagnostic tools for the plasma potential with a good temporal and spatial resolution in many plasmas, even up to middle-sized fusion experiments. We present the results of investigations on the heating of lanthanum hexaboride and graphite with an infrared diode laser and on the development of a laser-heated emissive probe. Such a probe has a higher electron emission, much longer life time and better time response than a conventional emissive wire probe. We have observed that from both materials electron emission current can be achieved sufficiently strongly even for dense laboratory and experimental fusion plasmas.
Original language | English |
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Pages (from-to) | 94-98 |
Number of pages | 5 |
Journal | Physica Scripta T |
Volume | T123 |
DOIs | |
Publication status | Published - 2006 |
Externally published | Yes |
Event | 5th International Workshop and Summer School on Plasma Physics - Kudowa Zdroj, Poland Duration: 6 Jun 2005 → 10 Jun 2005 |