Whole device ELM simulations

A simple ELM model is used in the SOLPS fluid-plasma, Monte-Carlo neutrals code with a grid that encompasses the core and Scrape-Off Layer. Sources in the core are prescribed based on previous work done with a 1d core transport code, and with the transport coefficients varied to produce a reasonable match to a particular ASDEX Upgrade discharge. Time-dependent calculations were then performed that looked at the effect of changing the ELM magnitude and radial extent (keeping the ELM frequency and duration fixed) and of varying the upstream separatrix density using a local gas puff under feed-back control to prescribe the density.