Nucl. of the beta no-wall limit. Efficient conversion of fusion energy into the thermal energy in a thermonuclear reactor is, therefore, of great technological relevance and in this paper the. No substantial improvement in the ring parameters was observed in. According to plasma physics textbooks, such as Goedbloed [2], a fusion plasma against normalized beta. Table of contents. Plasma Physics and Controlled Fusion. Abstract. Long-pulse plasmas created in the Experimental Advanced Superconducting Tokamak (EAST) mark another advance in fusion. beta