Photograph of the Adams-Shaw House (located at 3102 Coggin Avenue) in Brownwood, Texas.

Photograph of the Adams-Shaw House (located at 3102 Coggin Avenue) in Brownwood, Texas.

Weekly newspaper from Allen, Texas that includes local, state, and national news along with advertising.

Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.

Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.

Construction has started on an outdoor testing station for flexible ac superconducting power transmission cables. It is intended to serve as an intermediate step between laboratory-scale experiments and qualification testing of prototype-scale cables. The permanent equipment includes a 500 W supercritical helium refrigerator using a screw compressor and multistage turbine expanders. Helium storage for 250,000 cu ft of helium at 250 psi is provided. Initially, the cables will be tested in a horizontal cryostat some 250 ft long. High-voltage 60 Hz tests will be performed with the cable in a series resonant mode with a maximum line to ground capability of 240 kV, this is adequate for a 138 kV system design. Impulse testing up to about 650 kV is planned. The cable conductor will be energized by current transformers, initially at about 4 kA and later up to fault levels of 40 kA. The refrigerator is now at the site and testing on a dummy load will commence in the Fall of 1976. The cryostat will be installed in 1977 followed about a year later by the first cable tests.

Daily newspaper from Brownwood, Texas that includes local, state, and national news along with advertising.

Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.

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Weekly newspaper from Coleman, Texas that includes local, state, and national news along with advertising.

A superconducting cable incorporating Nb/sub 3/Sn is briefly described and requirements for the superconductor discussed. State of the art metallurgical procedures for reducing ac losses and increasing critical currents of Nb/sub 3/Sn are reviewed. The loss behavior is then related to presently available theoretical models and shown to depend largely on surface currents which are attributed to the surface barrier. Effects of temperature, trapped magnetic flux, cladding, and cable configuration are discussed. 11 figures, 43 references.

A program at Lawrence Livermore Laboratory to develop multifilamentary Nb/sub 3/Sn conductors suitable for use in constructing fusion research magnets has resulted in the commercial production of conductors having cross-sectional areas in the range 0.06 cm/sup 2/ to 0.84 cm/sup 2/. Critical current densities near the goal of 10/sup 4/ A/cm/sup 2/ at 12 T and 4.2 K have been obtained in conductors produced by two different techniques. The latest results of this program are presented and discussed.

Energy losses have been measured on a set of mixed matrix (CuNi, Cu, NbTi) superconducting wires at B's up to 1.5 x 10/sup 7/ G/s. The losses have been measured as a function of wire diameter, twist pitch, maximum applied field, and B. Both static and dynamic losses were measured for a field applied perpendicularly to the wire axis. The dynamic losses were measured by slowly applying an external field to a sample and then causing the field to decay exponentially in roughly 1 ms to 10 ms. Under low B (9 kG) and B (10/sup 6/ G/s) conditions the hysteretic loss dominated. At high B (21 kG) and B (1.5 x 10/sup 7/ G/s) the matrix losses became dominant. The systematic variation of the losses with the mentioned parameters will be presented and will be compared to theoretical predictions.

A status report is given of the design and fabrication of a small pilot-project accelerator and storage ring using superconducting magnets. The project is called ESCAR, for Experimental Superconducting Accelerator Ring. Work is reported on a pre-production dipole magnet, a 1500W helium refrigeration plant, planned major systems tests, and conventional component development. (PMA)

Photograph of the Harrison House (located at 803 Center Street) in Brownwood, Texas.

Three vaporization experiments were performed on samples of nearly stoichiometric titanium monoxide. Two experiments were constant temperature experiments (1806/sup 0/K) designed to measure the equilibrium vapor pressures of Ti(g) and TiO(g). In one experiment titanium monoxide was vaporized from a tungsten Knudsen effusion cell; the vapor was collected on a water cooled quartz cap surrounding the cell; and the total amount of titanium deposited on the cap was analyzed colorimetrically. In the second constant temperature experiment (1806/sup 0/K) the vapor composition in equilibrium with nearly stoichiometric titanium monoxide was measured mass spectrometrically. The mass spectrometer results were used to apportion the total titanium collected in the first experiment to Ti(g) and TiO(g). In the third experiment the temperature dependence of the ions Ti/sup +/(48) and TiO(64) was measured spectrometrically. The results obtained in this work are compared with published thermodynamic properties of the titanium oxygen system, and indicate the standard free energy of formation of titanium monoxide obtained from the earliest calorimetric measurements yielded a result not negative enough and also oxygen pressures obtained by emf measurements for stoichiometric titanium monoxide at 1806/sup 0/K are high by a factor of 42.6. The present results are in good agreement with the …

Photograph of a historic property in Texas.

The performance of ion extractors is analyzed with crude approximations that show improved performance to be possible with the certain modifications. However, additional studies are required to evaluate the beam optics in the presence of the deformed grids.

Daily newspaper from Lawton, Oklahoma that includes local, state, and national news along with advertising.

Daily newspaper from Levelland, Texas that includes local, state, and national news along with advertising.

Magnetic field profile measurements were performed on stabilized NbTi tapes in zero applied field carrying large transport current densities. Field profile data were taken on large diameter superconducting sample loops at temperatures between 2/sup 0/K and T/sub c/ (about 9.2/sup 0/K) and several persistent currents up to I/sub c/(T), the maximum. The field profiles scaled with current, independent of temperature, at temperatures below 8.5/sup 0/K and were well described by an elliptical shell approximation which left a current-free, field-free central region. Critical state models applied to this self-field situation proved inadequate. Complex profiles produced by trapped flux in the tape loop were described quantitatively by assuming concentric elliptical shells each with a different current density. The maximum current which could be persisted in the loop at each temperature was linear from 4 to 8.5 K. The effective resistance of the superconducting loop including its joint was less than 10/sup -13/ ohms.

Memorandum from Manuel Gonzales, League of United Latin American Citizens National President, and Eduardo Pena, Chairman of the Board of LULAC National Education Service Centers, directed to All LULAC Council Presidents and dated August 17, 1976. The memo refers to an attached allocation chart showing the distribution of the LULAC National Scholarship Fund among local LULAC Councils.

Memorandum from Manuel Gonzales, LULAC National Presdient, directed to All LULAC Council Presidents and dated August 17, 1976. The memo refers to the attached allocation chart and requests participation in the LULAC National Scholarship Fund.

Daily newspaper from Oklahoma City, Oklahoma that includes local, state, and national news along with advertising.