This paper presents plans, engineering parameters, and some test results for several FFTF core and primary sodium circuit instrument systems. Systems to be discussed include temperature, flow, pressure, leak detectors, level sensors, fuel failure monitoring, sodium impurity analysis and cover gas monitors. Results of recent demonstration tests of the FFTF Under-Sodium Viewing and Ranging system are also presented.

The treatments involve high temperature (1100/sup 0/C) austenitizing during the first solution treatment followed by either interrupted quenching (Ms-Mf range) or isothermal transformation to produce lower bainite. Finally, the steels are given a 900/sup 0/C grain refinement treatment. Lower bainite was obtained by isothermally transforming austenite just above the Ms temperature. Tempering after the martensitic and bainitic treatments was also done in an attempt to improve the toughness of the material. The strength and toughness properties of as-quenched martensitic structures are somewhat superior while these properties of lower bainitic structures are comparable to those of a plain 0.4C steel. The properties of the nearly 100 percent bainite structure were unaffected by the cooling rate from the transformation temperature. Elimination of intergranular cracking produced toughness properties in quenched and tempered martensites which are far superior to those of lower bainite at the same strength level. It has also been shown that the toughness properties of as-quenched double-treated steels are superior to single treated steels. The chromium appeared to have a strong influence on the nature and morphology of carbides, as the bainitic as well as the martensitic structures showed marked temper resistance in the tempering range 200 to 500/sup 0/C.

Polyethylene foils and parylene disks 5 to 10 ..mu..m thick have been irradiated by CO/sub 2/ laser pulses focused to flux levels in the 10/sup 13/ to 10/sup 14/ W/cm/sup 2/ range. The facility and the results obtained on these experiments are compared to similar targets hit with 1.06 ..mu.. pulses of like intensity. A CO/sub 2/ laser system, ''Valkyrie,'' fabricated from commercially available components was assembled for these experiments.

An experiment designed primarily to define the problems associated with sampling the two-phase flow in a pipeline of geothermal brine is described. Analyses reported for 26 samples include chemical composition, oxidation potential, pH, density, and total solids. Changes in brine composition as the well operated during a four-week period are evaluated. The apparatus and techniques used for sampling are described and evaluated. (auth)

A separate entry was prepared for each of the 18 papers presented at the conference. (RCK)

Light activated multilayered silicon semiconductor devices have been used to switch at megawatt power levels with nanosecond turnon time. Current rate of rise of 700 kA/..mu..s at 10 kA, with 1 kV across the load have been achieved. Recovery time of 1 millisec has been obtained. Applicability to fusion research needs is discussed.

This report describes a 1 pulse per second capacitor bank designed to energize a dense-plasma focus (DPF). The DPF is a neutron source capable (with moderate scaling) of delivering a minimum of 10/sup 15/ neutrons per pulse or neutron flux of 2 x 10/sup 13/ N/cm/sup 2/ .s. The average power consumption, which has become a major issue due to the energy crisis, is analyzed with respect to other plasma devices and is shown to be highly favorable. This small source size high flux neutron source could be extemely useful to qualify fission reactor material irradiation results for fusion reactor design.

The use of multistep photoionization techniques to measure lifetimes, cross sections, and branching ratios in uranium is described. The measurement of autoionization behavior, the assignment of new levels, and the observation of Rydberg states are also described. Experimental data are presented for all parameters. (auth)

The design of a multi-level store file management system is described. The index structure and functional capabilities of the system are presented. The paper discusses the roles of disk and tape in the system, how the system was debugged, periodic checks of the disk space management, some interesting statistics, and the future of the FILEM system. 4 figures

This paper reviews recent developments and applications of ultrafast diagnostic techniques for x-ray measurements. These techniques, based on applications of image converter devices, are already capable of significantly important resolution capabilities. Techniques capable of time resolution in the sub-nanosecond regime are being considered. Mechanical cameras are excluded from considerations as are devices using phosphors or fluors as x-ray converters.

The addition of martensitic and reverse martensitic phase transformations to precipitation hardening results in significant strengthening of Fe--Ni--Ti austenitic alloys due to the transformation-induced defects. Multiple cycles of ..gamma..--..cap alpha..'--..gamma.. transformations led to a further strengthening. The stability of ausaged austenite as well as ausaged and transformation strengthened austenite is improved significantly through a final isothermal treatment at 500/sup 0/C. This stabilization results in an increase of both the strength and the ductility in less stable (mechanically) austenites while only the increase of ductility was observed in relatively stable austenites.

A spectrometer has been developed for measuring the charged particle production cross sections and spectra in neutron-induced reactions. The spectrometer consists of a magnetic quadrupole doublet which focuses the charged particles onto a silicon surface barrier detector telescope which is 2 meters or more from the irradiated sample. Collimators, shielding, and the large source-to- detector distance reduce the background enough to use the spectrometer with a 14- MeV neutron source producing 4 . 10$sup 12$ n/s. The spectrometer has been used in investigations of proton, deuteron, and alpha particle production by 14-MeV neutrons incident on various materials. Protons with energies as low as 1.1 MeV have been measured. The good resolution of the detectors has also made possible an improved measurement of the neutron- neutron scattering length from the 0$sup 0$ proton spectrum from deuteron breakup by 14-MeV neutrons. (auth)

A MWPC with external collimator converter system has been developed specifically for the detection of 0.511 MeV gammas in a positron camera. The design basis is applicable also to the imaging of other gammas and neutrons. The converter consists of honeycomb cells which provide an enhanced area of escape surface as well as restricting the range of conversion electrons to the cell dimensions. (WHK)

The electrical resistivity and magnetic susceptibility of the cubic intermetallic compounds UIr$sub 2$ (MgCu$sub 2$-type) and UIr$sub 3$ (ordered, AuCu$sub 3$-type) were measured between 2-300$sup 0$K. The susceptibility of UIr$sub 3$ is temperature independent and substantially lower than that of isoelectronic URh$sub 3$, being 0.57 vs 0.97 x 10$sup -3$ emu/mole at room temperature. The susceptibility of UIr$sub 2$ is very weakly temperature dependent above 100$sup 0$K and has a value of 1.18 x 10$sup -3$ emu/mole at room temperature. The electrical resistivities of both compounds follow power law dependences at low temperatures, of the form rho-rho$sub 0$ = AT/sup n/, with n = 1.9 for UIr$sub 2$ and n = 3.7 for UIr$sub 3$. These results indicate that UIr$sub 2$ may be a spin fluctuation compound, while UIr$sub 3$ behaves as a simple transition metal compound, with even less d-f character than URh$sub 3$ (n = 3.0). The specific heat of UIr$sub 2$ was measured between 1-4K and may be fit to C =$gamma$T + $beta$T$sup 3$, with a large value of $gamma$, 62.5 mJ/(mole- K$sup 2$), which is consistent with a narrow 5f band at the Fermi level. The lack of any magnetic phenomena in UIr$sub 3$ is …

In spite of the remarkable safety record of the nuclear industry as a whole, recent public concern over the potential impact of the industry's accelerated growth has prompted ERDA to expand its emergency response procedures. The Atmospheric Release Advisory Capability, ARAC, is a computer communications system designed to enhance the existing emergency response capability of ERDA nuclear facilities. ARAC will add at least two new functions to this capability: centralized, real-time data acquisition and storage, and simulation of the long range atmospheric transport of hazardous materials. To perform these functions, ARAC employs four major sub-systems or facilities: the site facility, the central facility, the global weather center and the regional model. The system has been under development for the past two years at the Lawrence Livermore Laboratory of the University of California. (auth)

Results obtained by means of x-ray photoelectron spectroscopy and internal reflection infrared spectroscopy demonstrate the feasibility of heterogeneous oxidation of sulfur dioxide on soot particles in air. Sulfuric acid formed in this process can be neutralized on basic surface sites of soot particles, resulting in the formation of carbonium and/or oxonium sulfate. Hydrolysis of these salts into cyclic hemiacetals and sulfuric acid is expected.

Parylene disks supported on glass stalks were irradiated with 1.06 $mu$m wavelength laser light pulses focused to flux intensities in the range from 10$sup 15$ to 10$sup 17$ W/cm$sup 2$. According to photodiode measurements the fraction of laser light absorbed, 25 to 50 percent, increased slightly as the laser intensity was increased. However, box calorimeter measurements implied that the fraction absorbed was approximately 30 percent and insensitive to irradiation intensity. Some x-ray spectra are discussed. (MOW)

This paper discusses the accelerating, or main supply for the Neutral Injection System on PLT and, in particular, provides evaluation of a system for protection against the possibility of an arc developing in the accel portion of the ion source gun. The design of a protection scheme utilizing a fast turn-on and turn-off ignitron crowbar is described and evaluated. This crowbar is used to provide backup protection for the ion source high power vacuum tube used as a voltage regulator and series switch. Ignitron crowbars are proposed for use as primary protection of the 150 KV ion source being developed for the Tokamak Fusion Test Reactor (TFTR) if a 150 KV switch tube is not readily available and inexpensive. (auth)

Recent polarization studies in N--N scattering at and below 50 MeV have provided specific and significant improvements in the phase-shift parameters. High energy investigations with both polarized proton beams and targets have shown unexpectedly large spin effects, and this provides a challenge for theoretical effort to explain these results. Experimental and theoretical work on the three-nucleon problem continues to yield new and interesting results, with the emphasis now shifting to polarization studies in the breakup reaction. On- going work on several-nucleon systems continues to provide polarization data for general analyses, nuclear structure information, or specific resonance effects. Finally, the basic interaction symmetries continue to have unique and important consequences for polarization observables. 17 figures. (auth)

A description is given of how a typical four channel microscope experiment is recorded and processed. The computer code MISE is described. Seventeen figures showing various results are given. (MOW)

The mechanical design and construction of a 5 cm bore, 23 cm long solenoidal magnet operated at 250 kilogauss is described. The magnet provides confining field for a plasma heated by a CO$sub 2$ laser. Radial diagnostic ports with a clear aperture of 0.41 cm allow viewing access near the magnet midplane. The on-axis field homogeneity is within 5 percent over a central length of 12 cm. The magnet sustained 500 to 1000 pulses at the highest field levels before catastrophic failure. (auth)

Nuclear activation techniques were used to measure the fluence of high energy deuterons in a plasma focus device having a stored energy of 75 kilojoules at 18 kV. The $sup 12$C(d,n)$sup 13$N (330 keV threshold) and $sup 27$Al(d,p)$sup 28$Al reactions were used to provide both an absolute number of high energy deuterons and an average energy, evaluated from the $sup 13$N/$sup 28$Al ratio calculated for various energies by Young. Previous measurements indicated more than 10$sup 15$ deuterons could be accelerated to energies above 330 keV in the low pressure mode of operation, with a highly anisotropic distribution. Present measurements show that more than 10$sup 12$ deuterons achieve energies greater than 5 MeV on some high intensity shots in the low pressure mode. The presence of multi-MeV deuterons in the plasma focus device was substantiated by measuring activation as a function of depth in 1 mil Al foils, and by measurements of neutron energy using time-of-flight. (auth)

Neutron diffraction measurements of the elastic magnetic scattering cross section from antiferromagnetic UO$sub 2$ show additional nuclear intensity below T/sub N/ = 30.8$sup 0$K. An examination was made of the possibility of analyzing the additional scattering in terms of homogeneous distortions, which involve shifts of the oxygen atoms from their fluorite lattice sites. The behavior arising from the presence of these homogeneous distortion modes formed the basis for Allen's theory of a cooperative Jahn--Teller effect in UO$sub 2$. However, an analysis in terms of these homogeneous distortions cannot explain the neutron data. But, by extending Allen's concepts to include inhomogeneous deformations, corresponding to a zone boundary q = ($pi$/a) (1,0,0) phonon, excellent agreement is obtained between theory and experiment. The oxygen displacement is 0.014(1) A from the fluorite lattice positions and, in addition, the inhomogeneous deformation (T/sub 2g/(Q$sup 1$)--T/sub 1g/) does not require a reduction in the overall symmetry of the unit cell. The essential features of Allen's theory for UO$sub 2$ can still be maintained. (auth)

A multiwire proportional chamber positron camera consisting of four 48 x 48 cm$sup 2$ detectors linked to a small digital computer has been designed, constructed, and characterized. Initial clinical application to brain imaging using $sup 68$Ga DTPA in 10 patients with brain tumors is described. Tomographic image reconstruction is accomplished by an algorithm determining the intersection of the annihilation photon paths in planes of interest. Final image processing utilizes uniformity correction, simple thresholding, and smoothing. The positron brain images were compared to conventional scintillation brain scans and x-ray computerized axial tomograms (CAT) in each case. The positron studies have shown significant mitigation of confusing superficial activity resulting from craniotomy in comparison to conventional brain scans. Central necrosis of lesions observed in the positron images, but not in the conventional scans, has been confirmed in CAT. Modifications of the camera are being implemented to improve image quality, and these changes combined with the tomography inherent in the positron scans are anticipated to result in images superior in information content to conventional brain scans. (auth)