TJ-II:Langmuir Probes: Difference between revisions
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== Probe heads == | == Probe heads == | ||
Several different heads can be mounted on the reciprocating drives: e.g., | Several different heads can be mounted on the reciprocating drives: e.g., staircase Langmuir probes, a rake probe (as of 2009), or a multi-pin Langmuir probe (2010). A [[TJ-II:Biasing probe|biasing probe]] has also been used. | ||
[[File:Langmuir_probe_head.gif|200px|thumb|left|Photo of a | [[File:Langmuir_probe_head.gif|200px|thumb|left|Photo of a staircase Langmuir probe head with three sets of measurement pins]] | ||
[[File:TJ-II_Rake.png|300px|thumb|right|Photo of a Langmuir rake probe head]] | [[File:TJ-II_Rake.png|300px|thumb|right|Photo of a Langmuir rake probe head]] | ||
[[File:Multipin.jpg|200px|thumb|left|Photo of a multipin Langmuir probe head]] | |||
== See also == | == See also == | ||
Revision as of 12:20, 29 July 2011
TJ-II has two fast reciprocating drives for Langmuir probes (with a displacement velocity of approximately 1 m/s). [1] [2] [3] Probe drive 1 is located at φ = 38° (sector D4) and probe drive 2 at φ = 195° (sector B2).
Probe heads
Several different heads can be mounted on the reciprocating drives: e.g., staircase Langmuir probes, a rake probe (as of 2009), or a multi-pin Langmuir probe (2010). A biasing probe has also been used.
See also
References
- ↑ M.A. Pedrosa et al, Fast movable remotely controlled Langmuir probe system, Rev. Sci. Instrum. 70 (1999) 415
- ↑ E. Calderón et al, On the Influence of Probe Presheath on the Measurement of Fluctuation and E × B Turbulent Transport by Langmuir Probes, Contributions to Plasma Physics 44, Issue 7-8 (2004) 700 - 704
- ↑ M.A. Pedrosa et al, Evidence of Long-Distance Correlation of Fluctuations during Edge Transitions to Improved-Confinement Regimes in the TJ-II Stellarator, Phys. Rev. Lett. 100 (2008) 215003