TJ-II: Combining retarding-field energy analyzer and electrostatic probes measurements, an approach to measure the phase relation between density and temperature fluctuations using RFA?: Difference between revisions

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'''Goal'''.  We propose to explore the feasibility of measuring the phase relation between density and temperature fluctuations using a combined diagnostic based on Retarting Field Analyzer (RFA) and Langmuir probes that has been recently developed in the TJ-II stellarator.
'''Goal'''.  We propose to explore the feasibility of measuring the phase relation between density and temperature fluctuations using a combined diagnostic based on Retarting Field Analyzer (RFA) and Langmuir probes that has been recently developed in the TJ-II stellarator.


In addition, the unique capabilities of the dual HIBP system would allow the investigation of density and potential fluctuations in the TJ-II stellarator, from plasma core to plasma edge. Simultaneous, spatially overlapping, measurement of plasma parameters, using HIBP and electrostatic probes, would allow novel probe configurations [e.g. baffled probes] to be tested, and would provide plasma boundary conditions for HIBP calibration.
In addition, the unique capabilities of the dual HIBP system would allow the investigation of density and potential fluctuations in the TJ-II stellarator, from plasma core to plasma edge. Simultaneous, spatially overlapping, measurement of plasma parameters, using HIBP and electrostatic probes, would allow novel probe configurations [i.e. baffled probes <ref>V.I. Demidov et al., Contrib. Plasma Phys. 44 (2004) 689</ref>] to be tested, and would provide plasma boundary conditions for HIBP calibration.


== International or National funding project or entity ==
== International or National funding project or entity ==
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