Table 2 DLS reduced model predictions are in agreement with observations

From: Divertor shaping with neutral baffling as a solution to the tokamak power exhaust challenge

 

Detachment onset

EIR onset

 

Model

Experiment

Model

Experiment

SXD

−55%

<−37%

0%

Reference

ED

−40%

<−37%

+36%

+27%

CD

0%

Reference

+106%

>+52%

  1. Measured and Detachment Location Sensitivity (DLS) model predicted relative differences (in core density) between the different divertor topologies (Super-X (SXD), Elongated (ED) and Conventional (CD) Divertor) for the detachment onset (Te = ~3–5 eV) and the onset of Electron Ion Recombination (EIR), serving as a colder reference point (Te ≪ 1 eV). The experimentally observed density at which the CD detaches (\({f}_{{{{\rm{GW}}}}}^{{{{\rm{ref,CD,detach}}}}}\)) and at which the EIR occurs in the SXD (\({f}_{{{{\rm{GW}}}}}^{{{{\rm{ref,SXD,EIR}}}}}\)) are used as reference densities. The percentages shown are the observed and DLS modelled relative density differences to the reference for detachment onset (\({f}_{{{{\rm{GW}}}}}^{{{{\rm{ED,SXD,detach}}}}}/{f}_{{{{\rm{GW}}}}}^{{{{\rm{ref,CD,detach}}}}}\)) and EIR onset (\({f}_{{{{\rm{GW}}}}}^{{{{\rm{CD,ED,EIR}}}}}/{f}_{{{{\rm{GW}}}}}^{{{{\rm{ref,SXD,EIR}}}}}\)). These DLS modelled differences only depend on magnetic topology, see Methods section. The density range obtainable in the experiment limits the differences in detachment and EIR onset that can be explored between the different topologies. Therefore, when < (or  > ) is indicated, the detachment or EIR onset is not observed in the experiment and the relative difference is larger than indicated.
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