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>M.A. Pedrosa et al, ''Fast movable remotely controlled Langmuir probe system'', [[doi:10.1063/1.1149350|Rev. Sci. Instrum. '''70''' (1999) 415]]</ref> | ||
<ref> | <ref>E. Calderón et al, ''On the Influence of Probe Presheath on the Measurement of Fluctuation and E × B Turbulent Transport by Langmuir Probes'', [[doi:10.1002/ctpp.200410104|Contributions to Plasma Physics '''44''', Issue 7-8 (2004) 700 - 704]]</ref> | ||
<ref> | <ref>M.A. Pedrosa et al, ''Evidence of Long-Distance Correlation of Fluctuations during Edge Transitions to Improved-Confinement Regimes in the TJ-II Stellarator'', [[doi:10.1103/PhysRevLett.100.215003|Phys. Rev. Lett. '''100''' (2008) 215003]]</ref> | ||
<ref> | Probe drive 1 is located at φ = 38.2°, R=134 cm ([[TJ-II:Sectors|sector]] D4) and probe drive 2 at φ = 195° ([[TJ-II:Sectors|sector]] B2). | ||
Probe 1 is located at φ = | |||
== 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 [[TJ-II:Biasing probe|biasing probe]] has also been used. | |||
{| border="0" style="width:450px;" | |||
|- valign="top" | |||
| [[File:Langmuir_probe_head.gif|200px|thumb|left|Photo of a staircase Langmuir probe head with three sets of measurement pins]] | |||
| [[File:Multipin.jpg|200px|thumb|left|Photo of a multipin Langmuir probe head]] | |||
|- | |||
| [[File:TJ-II_Rake.png|400px|thumb|left|Photo of a 12-pin Langmuir rake probe head]] | |||
| [[File:Probe_8.png|400px|thumb|left|Photo of an 8-pin Langmuir rake probe head]] | |||
|- | |||
|} | |||
== See also == | |||
* [[TJ-II:Limiter|Limiter probes]] | |||
== References == | == References == | ||
<references /> | <references /> | ||
Latest revision as of 15:03, 9 February 2021
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 = 38.2°, R=134 cm (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