Application of Townsend avalanche theory to tokamak startup by coaxial helicity injection

K Hammond, R Raman & F Volpe
Townsend avalanche theory is employed to model and interpret plasma initiation in NSTX by Ohmic heating and coaxial helicity injection (CHI). The model is informed by spatially resolved vacuum calculations of electric field and magnetic field line connection length in the poloidal cross-section. The modelis shown to explain observations of Ohmic startup including the duration andlocation of breakdown. Adapting the model to discharges initiated by CHI offers insight into the causes of upper divertor (absorber)...
This data repository is not currently reporting usage information. For information on how your repository can submit usage information, please see our documentation.