| Zugriffsnummer | 29283 |
| Dokumenttyp | Konferenzartikel |
| Sprache | Englisch |
| Titel | Quantitative measurements of two-photon induced Lα fluorescence: a proof for tokamak edge diagnostics |
| Autor(in); Institution |
Grützmacher, Klaus; 7.22, Hochtemperaturmetrologie, PTB-Berlin
Steiger, Andreas; 7.22, Hochtemperaturmetrologie, PTB-Berlin
Seiser, Christian; 7.2, Detektorradiometrie, PTB-Berlin
de la Rosa, M. Inmaculada; 7.22, Hochtemperaturmetrologie, PTB-Berlin
Johannsen, Eckhard; 2.011, Elektrische Mess- und Prüfverfahren, PTB-Berlin
|
| Quelle/Jahr | Diagnostics for experimental thermonuclear fusion reactors 2: [proceedings of the International School of Plasma Physics Piero Caldirola Workshop on Diagnostics for Experimental Fusion Reactors, held September 4 - 12, 1997, in Varenna, Italy]:(1998), 385 - 388 |
| ISBN | 0-306-45835-7 |
| Verlag | New York: Plenum Press |
| Konferenzangaben | International School of Plasma Physics "Piero Caldirola" Workshop on Diagnostics for Experimental Fusion Reactors, Varenna, 4-12, September, 1997, Italy |
| Zusammenfassung | Future application of two-photon induced Lyman-α fluorescences (2γ-Lα) measurements as an isotope selective determination of small neutral densities (H, D, T) in magnetically confined fusion plasmas require quantitative studies of this novel technique. A first feasibility study has been terminated recently in a close cooperation between PTB and Max-Planck Institute of Plasma Physics (IPP), Ass. EURATOM, at the Plasma Generator PSI-1 at IPP. Quantitative 2γ-Lα measurements were mainly carried out in order to proof the detection sensitivity achievable at PSI-1. Deuterium densities as small as 1010 cm-3 were determined in a measurement volume of only 0.1 cm-3, while the background radiation was like commonly stated for tokamak plasmas. Relying on theoretical predictions, we are therefore convinced, that measurements of the nT/nD ratio from 0.1 to 10 will be possible in the edge plasma of ITER, with single shot accuracy better than 20% and with the required spatial resolution. The detection limit for each isotope is expected to be well below 109 cm-3. |
Zitierung
Grützmacher, K., Steiger, A., Seiser, C., de la Rosa, M. I., & Johannsen, E. (1998). Quantitative measurements of two-photon induced Lα fluorescence: a proof for tokamak edge diagnostics. International School of Plasma Physics "Piero Caldirola" Workshop on Diagnostics for Experimental Fusion Reactors, Varenna, 4-12, September, 1997, Italy.