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., staircase Langmuir probes, a rake probe (as of 2009), or a multi-pin Langmuir probe (2010) | 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). | ||
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| [[File:Probe_8.png|400px|thumb|left|Photo of an 8-pin Langmuir rake probe head]] | | [[File:Probe_8.png|400px|thumb|left|Photo of an 8-pin Langmuir rake probe head]] | ||
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| [[File:Vorticity probe.png|400px|thumb|left|Photo of a vorticity probe probe head<ref>D. Carralero Ortiz, ''Electromagnetic Instability Studies in Fusion Plasmas Edge'', [https://oa.upm.es/11485/ PhD thesis, UPM]</ref>]] | |||
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* [[TJ-II:Limiter|Limiter probes]] | * [[TJ-II:Limiter|Limiter probes]] | ||
* [[TJ-II:Biasing probe|Biasing probe]] | |||
== References == | == References == | ||
<references /> | <references /> | ||
Revision as of 10:04, 29 September 2025
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).
 Photo of a vorticity probe probe head[4] |
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
- ↑ D. Carralero Ortiz, Electromagnetic Instability Studies in Fusion Plasmas Edge, PhD thesis, UPM