Author: Christopher James Boswell
Publisher:
ISBN:
Category :
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.