It is shown that even normally incident laser light will be resonantly absorbed near the critical density surface when there are self-generated DC magnetic fields. Theoretical estimates for the coupling mechanism, saturation amplitudes, and absorption are given and tested in computer simulations for parameters characteristic of some recent laser-plasma experiments.

Results are presented of a development program aimed at making a full-scale, all-beryllium frustrum by riveted assembly methods. Included are descriptions of the sheet-metal fabrication practices and assembly plans. Results of extensive mechanical testing of both ingot- and powder-source beryllium products that are presented include tensile, notch-tensile, bearing, and shear tests. Although the full-size structure has not been built, examples are given of several conical and cylindrical structures that were made. The largest of these is a 20-in. diameter, 15-in. long cylinder that was roll-formed from one 0.050-in. thick ingot sheet and assembled with 60 countersunk rivets. Tensile testing of riveted flat coupons is also reported as is bulge testing of riveted cylindrical shells. A cost comparison of riveted deep-drawn and powder-source cylinders is made. Results show that when strength and dimensional tolerance requirements are not severe, a riveted assembly approach is warranted. 33 figures, 8 tables. (auth)

A series of boron-filled vinyl copolymer elastomer (VCE) and Viton A fluoroelastomer formulations was prepared and the physical characteristics of the cured formulations determined. Their weight loss on heating to 300/sup 0/C, as determined by two different analytical methods, did not agree. The presence of up to 0.23 percent boric acid in the boron powders used to fill a standard boron-filled VCE elastomer did not appear to affect the physical characteristics of the cured formulation. 7 tables. (auth)

The high-pressure liquid-phase flow microreactor is a unique reactor for obtaining quantitative kinetic data for catalytic hydrodesulfurization and hydrodenitrogenation. The hydrodesulfurization of dibenzothiophene involves formation of biphenyl as a primary reaction product without hydrogenation of the aromatic rings. The catalytic hydrodenitrogenation of quinoline involves rapid hydrogenation of the nitrogen-containing ring followed by cracking of the ring to produce an aniline which is slowly hydrodenitrogenated. The hydrodenitrogenation reactions follow first-order kinetics. The order of activity of five commercial hydrotreating catalysts for quinoline hydrodenitrogenation is (Ni--Mo/Al/sub 2/O/sub 3/) > (Ni--W/Al/sub 2/O/sub 3/) > (Ni--W/Al/sub 2/O/sub 3/--SiO/sub 2/) > (Co--Mo/Al/sub 2/O/sub 3/).