fabrication of atmospheric-tarnish-free copper metal mirrors for high-power laser applications

the patent application relates to a copper mirror and method of treating copper reflective surfaces, so that they may be used in a laser system. a copper mirror is placed in a vacuum chamber and ions are implanted into the surface to produce a good reflective surface which will not tarnish or be damaged by high-power lasers. (author)

warhead explosive liner

an improved warhead liner is made up of (a) a first layer composed of (1) a polyurethane elastomer which is the reaction product of a hydroxy-terminated polydiene intermediate polymer and a diisocyanate, (2) a hydrocarbon process oil, (3) hollow phenolic microspheres, (4) carbon black, and (5) asbestos fibers; and (b) a second layer compo..

investigation of coating compounds and adhesives for self-supporting collapsible fuel storage tanks

coatings and adhesives were evaluated as potential candidates from which self-supporting collapsible fuel storage tanks can be fabricated. the evaluation was concerned with polyurethane coatings, and was performed utilizing glass, kevlar, dacron and nylon fabrics as reinforcing members. emphasis was placed on spray coating of one-shot pol..

development of low-cost hardened zinc selenide for ir windows

this development program has established the feasibility of fabricating large-size (13 x 20 in.) durable multispectral flir windows by a chemical vapor deposition process at a cost consistent with the program goals. the window is a composite that consists of two layers; a relatively thick (approximately equal to 0.6 in.) zinc selenide sub..

ion-beam technology and applications

ion propulsion research and development yields a mature technology that is transferable to a wide range of nonpropulsive applications, including terrestrial and space manufacturing. a xenon ion source was used for an investigation into potential ion-beam applications. the results of cathode tests and discharge-chamber experiments are pres..

surface-finish measurement with interference microscopes

diamond turning copper and other metals, to produce mirror surfaces with reflectivities generally higher than can be obtained by lapping and polishing, has become an important new technology. evaluation of the finish of these surfaces requires careful examination, using optical instruments. this document provides background information ab..

development of nb sub 3 sn conductor for ac superconducting power transmission cables. final report

the experimental studies performed under this contract comprised investigation of two principal approaches to achieving very low levels of ac loss in nb sub 3 sn produced by the liquid diffusion process. these approaches were inhibition of the formation of coarse structured nb sub 3 sn surface layers; and surface refinement by removal of ..

immobilized enzymes (citations from the ntis data base)

the bibliography covers the industrial as well as the biochemical use of immobilized enzymes. enzyme technology, activity, stability, supports, fabrication, deactivation, and chemical reactions are cited. some of the applications for these enzymes include food processing and chemical manufacturing. (this updated bibliography contains 81 a..

enzyme alarm instrumentation studies

polarographic-type electrochemical enzyme alarms were designed and engineered to automatically detect c-agents in the field. the target specifications include lower power consumption, small size, light weight, and operating capability from -40 f to +120 f. interference compensation and controlled potential circuitry developed under edgewo..

goods transportation in urban areas. proceedings of the engineering foundation conference held at south berwick, maine, on august 5-10, 1973

a five-day conference to explore issues in urban goods movement was organized by representatives of the american society of civil engineers, highway research board, institute of traffic engineers, and the u.s. department of transportation. five areas were studied and reported by probe groups, namely (1) urban goods movement considerations..