The "O(t. p) reaction has been used to locate 0' and 2' 6p-2h levels at 4456 and 5304 keV, respectively, in ''0. Excitation energies and (t, p) strengths are in good agreement with this identification. Results for all other ievels,observed below 5.4 MeV excitation are well accounted for in an (~d )~ model.
The status of modelling work focused on developing the advanced tokamak (AT) scenarios in DIII-D is discussed. The objective of the work is twofold: (a) to develop AT scenarios with ECCD using time dependent transport simulations, coupled with heating and current drive models, consistent with MHD equilibrium and stability; and (b) to use time dependent simulations to help plan experiments and to understand the key physics involved. Time dependent simulations based on transport coefficients derived from experimentally achieved target discharges are used to perform AT scenario modelling. The modelling indicates that off-axis ECCD with approximately 3 MW absorbed power can maintain high performance discharges with qmin > 1 for 5-10 s. The resultant equilibria are calculated to be stable to n = 1 pressure driven modes. The plasma is well into the second stability regime for high-n ballooning modes over a large part of the plasma volume. The role of continuous localized ECCD is studied for stabilizing m/n = 2/1 tearing modes. Progress towards validating current drive and transport models, consistent with experimental results, and developing self-consistent, integrated high performance AT scenarios is discussed.
Using a normal arrangement of apparatus, and x rays from a Cu or Fe target, well-exposed Laue photographs of diamond sometimes show sharp diffraction curves around (111)) (220) or (113) Laue spots. These curves are due to secondary diffraction by the black paper (light-tight) cover of the film-holder, and they only occur when the crystal is correctly set, to within It O O . 3 , for selective reflection of the characteristic KE or p radiation from one of these strongly reflecting diamond planes. This
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