Abstract: A radiation detection system for detecting the presence and location of a radiation source includes an optical fiber bundle having fibers of different lengths, a radiation sensitive material, a stimulating source and an optical detector. The stimulating source stimulates the radiation sensitive material and the radiation sensitive material releases a light output, while the light output provides a readout signal for each fiber corresponding in intensity to the radiation received from the radiation source. The optical detector receives the readout signal such that the variations in intensity of the readout signals along the length of the bundle determine the presence and general location of the radiation source.

Abstract: A radiation detection system for detecting the presence and location of a radiation source includes an optical fiber bundle having fibers of different lengths, a radiation sensitive material, a stimulating source and an optical detector. The stimulating source stimulates the radiation sensitive material and the radiation sensitive material releases a light output, while the light output provides a readout signal for each fiber corresponding in intensity to the radiation received from the radiation source. The optical detector receives the readout signal such that the variations in intensity of the readout signals along the length of the bundle determine the presence and general location of the radiation source.

Abstract: A radiation detection system for detecting the presence and location of a radiation source includes an optical fiber bundle having fibers of different lengths, a radiation sensitive material, a stimulating source and an optical detector. The stimulating source stimulates the radiation sensitive material and the radiation sensitive material releases a light output, while the light output provides a readout signal for each fiber corresponding in intensity to the radiation received from the radiation source. The optical detector receives the readout signal such that the variations in intensity of the readout signals along the length of the bundle determine the presence and general location of the radiation source.

Abstract: The present invention includes an open-loop AMTEC cell operable in a delivery mode and in a priming mode. In the delivery mode, the cell provides electrical potential through electrochemical reactions, which persist until the ion content of the cell is exhausted. In the priming mode, the electrochemical potential of the cell is established through an outside electrical potential or through a reversal of the thermal gradient within the cell. The cell of the present invention is particularly operable in accordance with a preferred method and also as a component of a suitable electrical system.

Abstract: An alkali metal thermal to electric converter (AMTEC) cell of the type employing an alkali metal flowing between a hot end of the AMTEC cell and a cold end of AMTEC cell. The AMTEC cell being separated into a low-pressure zone and a high-pressure zone and comprising a condenser communicating with the low-pressure zone for condensing alkali metal vapor migrating through the low-pressure zone from the solid electrolyte structure, a return channel coupled to the condenser for directing the condensed alkali metal from the condenser toward the hot end of the AMTEC cell, an evaporator coupled to the return channel and communicating with the high-pressure zone for evaporating the condensed alkali metal into the high-pressure zone, the evaporator including an evaporation surface, and a solid electrolyte structure separating the low-pressure zone and the high pressure zone and having alkali metal simultaneously existing in a vapor and liquid state in its interior.

Abstract: An improved active metal braze filler material is provided in which the coefficient of thermal expansion of the braze filler is more closely matched with that of the ceramic and metal, or two ceramics, to provide ceramic to metal, or ceramic to ceramic, sealed joints and articles which can withstand both high temperatures and repeated thermal cycling without failing.

Abstract: The present invention provides a microscreen radiation shield which reduces radiative heat losses in thermoelectric generators such as sodium heat engines without reducing the efficiency of operation of such devices. The radiation shield is adapted to be interposed between a reaction zone and a means for condensing an alkali metal vapor in a thermoelectric generator for converting heat energy directly to electrical energy. The radiation shield acts to reflect infrared radiation emanating from the reaction zone back toward the reaction zone while permitting the passage of the alkali metal vapor to the condensing means. The radiation shield includes a woven wire mesh screen or a metal foil having a plurality of orifices formed therein.

Abstract: The invention is directed to a composite article suitable for use in thermoelectric generators. The article comprises a thin film of titanium nitride as an electrode deposited onto solid electrolyte. The invention is also directed to the method of making same.

Abstract: A new method of tissue oxygen tension measurement which is suitable for human use utilizes an implanted Silastic tube which is inserted through four to five cm of subcutaneous tissue leaving the ends exposed. With the tube filled, for example, with a saline solution, reference and oxygen electrodes are inserted at the exposed ends and by the use of a polarographic potential the amount of oxygen which permeates through the tube from the tissue into the saline solution may be measured on a continuous real-time basis.

Abstract: A thermoelectric generator device which converts heat energy to electrical energy. An alkali metal is used with a solid electrolyte and a portion of the return line for the alkali metal is located within the generator vacuum space.

Abstract: A nonmitogenic angiogenesis factor is isolated from wound fluid by dialysis to include materials in the molecular size range of 2,000 to 14,000, lyophilization, and chromatography. The nonmitogenic angiogenesis factor is identified by activity by corneal implant assay and by cell migration assay. The angiogenesis factor is also characterized by inactivity by mitogenesis assay.

Abstract: Electrolyte geometry in alkali metal thermoelectric generator devices that alters the view thereof seen by cooler condenser regions provides an increase in power generating area without undesirably concomitant increase in radiation heat transfer area.