Improved confinement of JT-60U plasmas

Experimental results of high I-p H-mode plasma, high triangularity plasma and radiative divertor are presented from the experimental campaign in 1995. II-mode operation was extended to I-p = 4.5 MA. The highest level of stored energy of W similar to 8 MJ was obtained with I-p = 3.5 - 4 MA. The initial experiment of high triangularity plasma was carried out with I-p less than or equal to 0.9 MA and 0.3 less than or equal to delta less than or equal to 0.55. In high triangularity plasma, beta(N), limit was increased by 30% and the highest record value of beta(T) = 2.7% was obtained. With P-NB = 23 MW and alternate Neon and D-2, puffing, 50% of the input power was radiated while the good core plasma performance was maintained in I-p = 1.2 MA and B-T = 2 T, ELMy H-mode plasma.