TJ-II:Langmuir Probes: Difference between revisions
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[[File:TJ-II_Langmuir.png|400px|thumb|right|Location of the reciprocating Langmuir probes at TJ-II]] | [[File:TJ-II_Langmuir.png|400px|thumb|right|Location of the reciprocating Langmuir probes at TJ-II]] | ||
[[TJ-II]] has two fast reciprocating drives for [[:Wikipedia:Langmuir probe|Langmuir probes]] (with a displacement velocity of approximately 1 m/s). | |||
[[TJ-II]] has two | |||
<ref>[http://link.aip.org/link/?RSINAK/70/415/1 M.A. Pedrosa et al, ''Fast movable remotely controlled Langmuir probe system'', Rev. Sci. Instrum. '''70''' (1999) 415]</ref> | <ref>[http://link.aip.org/link/?RSINAK/70/415/1 M.A. Pedrosa et al, ''Fast movable remotely controlled Langmuir probe system'', Rev. Sci. Instrum. '''70''' (1999) 415]</ref> | ||
<ref>[http://dx.doi.org/10.1002/ctpp.200410104 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]</ref> | <ref>[http://dx.doi.org/10.1002/ctpp.200410104 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]</ref> | ||
<ref>[http://link.aps.org/doi/10.1103/PhysRevLett.100.215003 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]</ref> | <ref>[http://link.aps.org/doi/10.1103/PhysRevLett.100.215003 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]</ref> | ||
Probe 1 is located at φ = 35° ([[TJ-II:Sectors|sector]] D4) and probe 2 at φ = 195° ([[TJ-II:Sectors|sector]] B2). | Probe drive 1 is located at φ = 35° ([[TJ-II:Sectors|sector]] D4) and probe drive 2 at φ = 195° ([[TJ-II:Sectors|sector]] B2). | ||
== Probe heads == | |||
Several different heads can be mounted on the reciprocating drives: e.g., multi-pin Langmuir probes, or a rake probe (as of 2009). A [[TJ-II:Biasing probe|biasing probe]] has also been used. | |||
[[File:Langmuir_probe_head.gif|200px|thumb|left|Photo of a multi-pin Langmuir probe head with three sets of measurement pins]] | |||
[[File:TJ-II_Rake.png|300px|thumb|right|Photo of a Langmuir rake probe head]] | |||
== References == | == References == | ||
<references /> | <references /> | ||
Revision as of 20:22, 16 November 2009
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 = 35° (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., multi-pin Langmuir probes, or a rake probe (as of 2009). A biasing probe has also been used.
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