High-field Side Scrape-off Layer Density Profiles Inferred from D[alpha] Emission on Alcator C-Mod PDF Download

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High-field Side Scrape-off Layer Density Profiles Inferred from D[alpha] Emission on Alcator C-Mod

High-field Side Scrape-off Layer Density Profiles Inferred from D[alpha] Emission on Alcator C-Mod PDF Author: Christopher James Boswell
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ISBN:
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Languages : en
Pages : 26

Book Description
Measurements from an inner wall mounted scanning Langmuir probe and modelling of D[alpha] emission show a sharp fall-off of plasma density in the inboard private flux region. D[alpha] emission is modelled using a one dimensional space, two dimensional velocity kinetic neutral code in order to track the changes in the density profile while the magnetic topology is changed from single to double null. A sharp density decay is observed to track with the location of the secondary separatrix. The presented data is consistent with a lower level of cross-field transport on field lines in the private flux region restricted to the high-field side when compared to cross-field transport on field lines in the low-field side scrape-off layer.