Applicability of Electron Emissive Probes for Plasma Potential and Electric Field Measurements in Magnetized Plasmas
Creators
- 1. Department of Ion Physics, University of Innsbruck, Innsbruck (Austria)
- 2. Institute of Plasma Physics, Academy of Sciences of the Czech Republic, Prague (Czech Republic)
- 3. Center for Nuclear Fusion, Instituto Superior Tecnico, Lisbon (Portugal)
- 4. Particle and Probe Diagnostic Group, CIEMAT, Madrid (Spain)
- 5. Consorzio RFX, Associazione Euratom-ENEA sulla Fusione, Padova (Italy)
- 6. Charles University, Prague (Czech Republic)
- 7. Department of Applied Physics, Ghent University, Ghent (Belgium)
Description
In the edge region of magnetised fusion experiments hitherto mainly cold probes were used in order to determine the plasma potential and thereby parameters like electric field turbulence. However, this method causes problems when the electron temperature varies and when the electrons are drifting. We have therefore used electron-emissive probes in (i) the tokamak ISTTOK in Lisbon, Portugal (ii) the CASTOR tokamak in Prague, Czech Republic, and (iii) the TJ-II stellarator in Madrid, Spain. Our method has the advantage that in principle the electron emission current compensates temperature variations and electron drifts. We discuss the applicability, the advantages and the limits of emissive probes for measurements of the plasma potential and the electric field, taking into account especially the effect of a space charge around the probe wire, formed by the emitted electrons
Additional details
Identifiers
- DOI
- 10.1063/1.1593903;
Publishing Information
- Journal Title
- AIP Conference Proceedings
- Journal Volume
- 669
- Journal Issue
- 1
- Journal Page Range
- p. 211-214
- ISSN
- 0094-243X
- CODEN
- APCPCS
Conference
- Title
- 11. international congress on plasma physics
- Acronym
- ICPP 2002
- Dates
- 15-19 Jul 2002
- Place
- Sydney (Australia)
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 36068251
- Subject category
- S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- CASTOR TOKAMAK; CURRENTS; ELECTRIC FIELDS; ELECTRON DRIFT; ELECTRON EMISSION; ELECTRON TEMPERATURE; ELECTRONS; ISTTOK TOKAMAK; PLASMA; PLASMA CONFINEMENT; PLASMA POTENTIAL; PROBES; SPACE CHARGE; STELLARATORS; TURBULENCE; VARIATIONS; WIRES
- Descriptors DEC
- CLOSED PLASMA DEVICES; CONFINEMENT; ELECTRIC POTENTIAL; ELEMENTARY PARTICLES; EMISSION; FERMIONS; LEPTONS; THERMONUCLEAR DEVICES; TOKAMAK DEVICES
Optional Information
- Notes
- (c) 2003 American Institute of Physics