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P: Fachverband Plasmaphysik
P 8: Plasmadiagnostik I
P 8.5: Talk
Wednesday, February 27, 2013, 15:15–15:30, HS 2
Fast diagnostics for magnetized high density plasmas — •P. Kempkes1,2, B. Buttenschön4, O. Grulke2, T. Klnger1,2, F. Mackel3, S. Ridder3, J. Tenfelde3, and H. Soltwisch3 — 1Ernst-Moritz-Arndt-Universität Greifswald — 2MPI für Plasmaphysik, EURATOM Assoziation, Greifswald — 3Ruhr-Universität Bochum — 4MPI für Physik, München
The transient evolution of pulsed magnetized high density plasmas raises the requirement for diagnostics with a temporal resolution in the microsecond range. In this contribution, a set of diagnostics for different plasma quantities is presented, consisting of CO2 laser interferometers for measuring the plasma density, electrostatic triple probes for density and electron temperature estimations and spectroscopic/imaging techniques that can be used for spatial correlation. The development of the diagnostics has been performed in the framework of two different plasma experiments: the FlareLab project aims at the experimental investigation of arched, twisted magnetic flux ropes. These structures are frequently utilized as a descriptive model for arched solar prominences. FlareLab is a classical pulsed-power plasma experiment, where discharge currents ≈10kA form a magnetized plasma arch with electron densities up to 1023m−3 which develop on a microsecond timescale. The other experiment is a high-density helicon plasma cell, which is developed as plasma source for a proton driven plasma wakefield accelerator. As a first stage, this experiment is equipped with a 12 kW rf power supply and operated in a pulsed fashion, in order to reach electron densities around 1021m−3.