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title: Tsviatko's probe
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This page was last updated on 27 March 2019.

#Introduction

[Tsviatko K. Popov](http://ariadnetopology.academia.edu/TsvKPopov) came to tokamak GOLEM in the week 25-29 March and he will install his probe, dubbed Tsviatko's probe. The probe $I-V$ characteristic was measured in hydrogen and in helium. For more information, contact Tsviatko or Miglena Dimitrova, who will be processing the data.

#Geometry
[<img src="http://golem.fjfi.cvut.cz/wiki/Diagnostics/ParticleFlux/TsviatkoProbe/PG/2019-03-19_18-51-51.jpg" width="300" height="225" />](/Diagnostics/ParticleFlux/TsviatkoProbe/PG/2019-03-19_18-51-51.jpg)
[<img src="http://golem.fjfi.cvut.cz/wiki/Diagnostics/ParticleFlux/TsviatkoProbe/PG/2019-03-19_19-45-38.jpg" width="300" height="225" />](/Diagnostics/ParticleFlux/TsviatkoProbe/PG/2019-03-19_19-45-38.jpg)
[<img src="http://golem.fjfi.cvut.cz/wiki/Diagnostics/ParticleFlux/TsviatkoProbe/PG/2019-03-19_20-03-18.jpg" width="300" height="225" />](/Diagnostics/ParticleFlux/TsviatkoProbe/PG/2019-03-19_20-03-18.jpg)
[<img src="http://golem.fjfi.cvut.cz/wiki/Experiments/EdgePlasmaPhysics/ParticleFlux/TsviatkoProbe/PG/IMG_20190308_080134.jpg" width="300" height="225" />](/Experiments/EdgePlasmaPhysics/ParticleFlux/TsviatkoProbe/PG/IMG_20190308_080134.jpg)
[<img src="http://golem.fjfi.cvut.cz/wiki/Diagnostics/ParticleFlux/TsviatkoProbe/PG/tsv_probe_dgc.jpg" height="225" />](/Diagnostics/ParticleFlux/TsviatkoProbe/PG/tsv_probe_dgc.jpg)


#Experiments

- 25 March 2019: #30045-#30072, hydrogen discharges
- 27 March 2019: #30128-#30153, helium discharges

Both the campaigns are recorded in the GOLEM discharge book, see that for shot numbers, their characteristics and the probe radius.