Pellet-Induced Charge Exchange Effects in Ohmically Heated and NB Heated Tokamak Plasmas

摘要

Pellet injection has become a frequently used method of replacing particle losses in divertor tokamaks and of depositing particles at depths not accessible to gas puffing. Pellets can also be used as markers for diagnostic purposes, or for building-up high-density target plasmas for neutral beam injection. It was decided to perform calculations for experimental plasma conditions by applying a transport code that incorporates Monte Carlo simulation of the neutral particle transport (1D PPPL transport code BALDUR). The primary objectives of these calculations were to obtain information on the effect of cx collisions on the pellet particle deposition profile and the plasma parameter distributions, and to obtain information on the magnitudes of the resulting particle and energy losses both in ohmically and NB-injection-heated plasmas. (ERA citation 09:029942)