Langmuir probes for plasma plume diagnostics

Summary form only given. Langmuir probes are highly versatile plasma diagnostic tools. Triple Langmuir probes (TLP) can be used to measure electron the temperature (T e ) and density (n e ) with time resolution. This ability gives a unique opportunity to observe the time evolution of discontinuities...

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Bibliographic Details
Main Authors: Arias, A., Quiros, N., Presura, R.
Format: Conference Proceeding
Language:English
Subjects:
Educational institutions
Physics
Plasma diagnostics
Plasma measurements
Probes
Temperature measurement
Online Access:Request full text
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Description
Summary:Summary form only given. Langmuir probes are highly versatile plasma diagnostic tools. Triple Langmuir probes (TLP) can be used to measure electron the temperature (T e ) and density (n e ) with time resolution. This ability gives a unique opportunity to observe the time evolution of discontinuities formed at the interaction of a plasma flow with a static background plasma. Adding a fourth probe, perpendicular to the flow direction, creates a quadruple Langmuir probe (QLP) which enables the measurement of plasma velocities. Being able to compare the fluid motion velocity with the propagation speed of perturbations will help identify the discontinuities observed, for example to distinguish between a shock in the ambient plasma from the arrival of the ablation plasma front. Results from TLP measurements and progress on QLP development will be presented.
ISSN:0730-9244
2576-7208
DOI:10.1109/PLASMA.2014.7012292