This paper reports the electroweak asymmetry in the reaction e/sup +/e/sup -/ ..-->.. tau/sup +/tau/sup -/ at 29 GeV. The results came from data taken with the High Resolution Spectrometer at PEP corresponding to an integrated luminosity of 256 pb/sup -1/. The 7372 observed events give A/sub tau tau/ = -(4.4 +- 1.4 +- 0.5)%. Events selected in the central region of the detector measure a total cross section of R/sub tau tau/ = 1.06 +- 0.02 +- 0.04. 5 refs., 1 fig.

The charged particle multiplicity distributions for single jets in e/sup +/e/sup -/ annihilation at 29 GeV have been measured using the High Resolution Spectrometer at PEP. The shape of the distribution agrees well with a Poisson distribution. No correlation is observed between the multiplicities in the two jets of an event. For fixed values of the prong number of the total event, the multiplicity sharing between the two jets is in good agreement with a binomial distribution. These observations are contrasted to the results from soft hadronic collisions and conclusions are drawn about the nature of clusters. 21 refs., 4 figs.

We report a measurement of the upper limit of the decay width for the D*/sup +/(2010) meson using the High Resolution Spectrometer at PEP. We observed the charged D* production in the decay mode of D*/sup +/ ..-->.. D/sup 0/..pi../sup +/ with the D/sup 0/ decaying into the K/sup -/..pi../sup +/ mode. The peak in the mass difference distribution M(K/sup -/..pi../sup +/..pi../sup +/)-M(K/sup -/..pi../sup +/) was used to directly measure the decay width. The width is dominated by the detector resolution and the preliminary result is an upper limit on the full width of GAMMA/sub D*/ < 1.15 MeV/c/sup 2/ at 90% C.L. 7 refs., 2 figs.

Determination of invariant-plane strain crystallographic solutions for martensitic transformation between the FCC delta and monoclinic ..cap alpha.. phases in plutonium alloys, using three possible lattice correspondences and 53 possible lattice-invariant shear systems, identifies the most probable delta-..cap alpha.. lattice correspondence. The operative lattice-invariant shear systems are predicted by comparison of both shape strain magnitudes and computed interfacial energies. For delta ..-->.. ..cap alpha.. transformation twinning on (001) (100)/sub ..cap alpha../ is favored, giving a (.817, .538, .208)/sub delta/ habit and a (.947, .269, .174)/sub delta/ shape strain of magnitude m/sub 1/ = .324. The ..cap alpha.. ..-->.. delta transformation favors slip on (111) (101)/sub delta/, giving a (.255, .844, .471)/sub ..cap alpha../ habit and (.822, .466, .355)/sub ..cap alpha../ shape strain of magnitude m/sub 1/ = .417.

The Soudan 1 experiment has obtained additional evidence for underground muons associated with the x-ray pulsar Cygnus X-3. We report the preliminary analysis of data recorded during the October 1985 radio outburst of Cygnus X-3, which show a significant excess of muons for a narrow range of Cygnus X-3 phases.

The following features, in particular, have been examined: (a) large aspect ratio (A approx. = 6), which may ease maintenance; (b) high beta (..beta.. greater than or equal to 0.20) without indentation, which brings the maximum toroidal field down to about 6 to 7 T; (c) low toroidal current (I approx. = 4MA), which reduces the cost of the current drive and equilibrium field system; and (d) steady state operation with current density control via fast and slow wave current drive. The key to high beta operation with low toroidal current lies in utilizing second stability regime equilibria with the required current distributions produced by an appropriate selection of wave driver frequencies and power spectra. The ray tracing and current drive calculation is self-consistent with the actual magnetic fields they produce in the plasma. The impurity control activities in TPSS have emphasized the self-pumping concept as applied to using the entire first wall or ''slot'' limiters. The blanket design effort has emphasized liquid metal and Flibe concepts. The reference concept is a liquid lithium/vanadium, self-cooled configuration. Overall, there exists a number of major design improvements which will substantially improve the attractiveness of tokamak reactors.

String models of unified interactions are elegant sets of Feynman rules for the scattering of gravitons, gauge bosons, and a host of massive excitations. The purpose of these lectures is to describe the progress towards a nonperturbative formulation of the theory. Such a formulation should make the geometrical meaning of string theory manifest and explain the many ''miracles'' exhibited by the string Feynman rules. There are some new results on gauge invariant observables, on the cosmological constant, and on the symmetries of interacting string field theory. 49 refs.

Positron-emitting radionuclides permit the use of electronic collimation and thus achieve higher resolution and better sensitivity than can be obtained with gamma-emitting radiotracers. The evolution of PET imaging systems can be traced from the use of opposed collimated scanning detectors, which had all the limitations of traditional single photon imaging devices, to the present systems which surround the subject with a large volume of detector material. The improvements in system resolution now approach the theoretical limitation imposed by positron-range, and angular deviation. The use of coding permits the use of shared electronics for reading our multiple detectors, which promises to decrease the cost of PET imaging devices, at some penalty of degraded performance. Improvements in computer architectures and capabilities permit faster reconstruction of the multiple planes imaged by multi-slice imaging systems. Software for distortion correction and image processing are still under development, and the ability to map between different devices requires the coordination of efforts between different groups in the same institution. The development and validation of the mathematical models for tracer kinetic analyses will continue to occupy the attention of clinicians and scientists involved in these developments. The desire to make these devices simple and cheap enough to be …

A computer-based system for collecting, processing, and analyzing pressure transient data has been developed. Primary components include downhole pressure sensors, linedrivers, a micro-computer, data storage disk, scanner, frequency counter, digital voltmeter, power supply, graphics plotter, and printer. In-field data processing and analysis greatly aid in handling the large volume of data that are collected during pressure transients tests, particularly the multiwell interference tests that are so important for characterizing and assessing geothermal reservoirs. In-field data processing provides the field engineer, on a real-time basis, with the information needed to make decisions regarding test parameters and duration. The system has been used on numerous occasions and has proved itself to be reliable under the harsh operating conditions that are usually encountered in the field. This paper describes the advantages of using this type of system for collecting data, the components and configuration of the system, and the software programs used to collect and process the data. Finally, two field applications are presented.

A review is presented of data and theoretical interpretations of the nuclear dependence of quark and antiquark distributions as observed in the deep inelastic scattering of neutrinos and charged leptons from nuclei. After a summary of the experimental situation and a survey of the broad spectrum of proposed explanations, I concentrate on the Q/sup 2/-rescaling approach and on interpretations in terms of conventional nuclear physics. The review concludes with a list of desirable future experiments. 31 refs., 4 figs.

The modular design of the linac cryostat system based on a cavity-pair is presented.Description of the cryogenic module consisting of four cavity-pairs is included.The methods of making a cavity-pair hermetic during cryostat assembly, introducing the waveguides, supporting the helium vessels and introducing instrumentation are presented.Also included are the methods of tuning the cavities, aligning them to exterior references and connecting cryogenic fluid circuits to adjacent modules and transfer lines.

The standard Model predicts sizeable if not even maximal B/sub s/ - anti B/sub s/ mixing; B/sub d/ - anti B/sub d/ mixing is not expected to exceed the one percent level unless top quarks are very heavy (m/sub t/ greater than or equal to 150 GeV). B decays also offer the best opportunity to discover CP violation outside the neutral K system. Employing the standard model one predicts - with reasonable confidence - CP symmetries of up to 20% (or even more in some cases). The branching ratios for the individual exclusive modes of interest are not expected to exceed the 10/sup -3/ level in most cases; the identification of such decays poses non-trivial problems. It is shown that by summing intelligently over appropriate classes of decays one can greatly enhance statistics without jeopardizing the signal. Very similar searches can be performed for D decays.

Non-leptonic B decays offer the best opportunity to discover the violation of CP invariance outside the neutral K system. Employing the Standard Model one predicts - with reasonable confidence - CP asymmetries of up to 205 (or even more in some cases). The branching ratios for the individual exclusive modes of interest are not expected to exceed the 10/sup -3/ level in most cases; the identification of such decays poses non-trivial problems. It is shown that by summing intelligently over appropriate classes of decays one can greatly enhance statistics without jeopardizing the signal. Data that contain 10/sup 6/ produced B mesons would allow meaningful searches for CP violation. It is noted that ''New Physics'' could lead to CP asymmetries in D/sup 0/ decays of order 1%. Due to higher branching ratios one can search for such effects in samples of 10/sup 6/ produced D mesons. 7 refs.

Numerical studies are performed to investigate the effects of localized feed zones on the pressure transients in two-phase reservoirs. It is shown that gravity effects can significantly affect the pressure transients, because of the large difference in the density of liquid water and vapor. Pressure transients for shallow and deep feed zones and the resulting fluid flow patterns are discussed.

The development of linear induction accelerators has been motivated by applications requiring high-pulsed currents of charged particles at voltages exceeding the capability of single-stage, diode-type accelerators and at currents too high for rf accelerators. In principle, one can accelerate charged particles to arbitrarily high voltages using a multi-stage induction machine, but the 50-MeV, 10-kA Advanced Test Accelerator (ATA) at LLNL is the highest voltage machine in existence at this time. The advent of magnetic pulse power systems makes sustained operation at high-repetition rates practical, and this capability for high-average power is very likely to open up many new applications of induction machines in the future. This paper surveys the US induction linac technology with primary emphasis on electron machines. A simplified description of how induction machines couple energy to the electron beam is given, to illustrate many of the general issues that bound the design space of induction linacs.

This report talks about The CEBAF Cryogenic System

A number of exclusive and inclusive antiproton reactions are discussed which could provide useful constraints or test novel features of quantum chromodynamics in the intermediate momentum transfer domain involving both perturbative and non-perturbative dynamics. High momentum transfer reactions are briefly reviewed. Inclusive antiproton reactions and the QCD critical length, QCD predictions for proton-antiproton exclusive processes, and studies of the Compton amplitude in proton-antiproton annihilation are covered. Testing hadron helicity conservation in heavy quark resonance is discussed. Also covered are heavy hadron pair production in proton-antiproton exclusive interactions, exclusive nuclear reactions, and quasi-exclusive nuclear processes. (LEW)

The Nova laser facility is designed to address critical issues for evaluating the feasibility of Inertial Confinement Fusion, to implode DT to densities exceeding 200 g/cm/sup 3/, and to perform a wide range of high energy density plasmas physics experiments in the areas of XUV/x-ray lasers, hydrodynamics, and radiation generation and transport. The ten-arm Nova laser is capable of irradiating complex targets with laser wavelengths of 0.53 and 0.35 ..mu..m, pulse widths from 0.09 ns to >5 ns, peak powers greater than several terawatts per beam line, and temporally shaped pulses. The output of the laser can be directed into two independent target areas; a 4.6 m diameter vacuum vessel for experiments which require ten beams and a 1.8 m diameter chamber for two Nova arms. A number of sophisticated optical, XUV, x-ray and particle diagnostics measure target performance. An overview of the facility will be presented and recent target experiments will be discussed. These target experiments include studies of forward stimulated Raman scattering and hot electron production, ablation pressure, XUV lasers, x-ray conversion efficiencies and implosions.

Both electron (direct) and x-ray (indirect) driven implosions of DT targets have been done using approx.20 kJ of 0.35 ..mu..m light from the ten beam Nova laser facility. The direct drive targets (glass microballoons with nominal dimensions of 1000 ..mu..m x 2 ..mu..m and DT pressures of 12 to 14 atm) produced neutron yields in excess of 10/sup 13/ and fusion efficiencies >0.15%. Recent experiments will be described, with particular emphasis on measurements made using neutron diagnostics.

Two techniques for identifying heavy Higgs bosons produced at SSC energies are discussed. In the first, the Higgs boson decays into ZZ, with one Z decaying into an e-pair or ..mu..-pair and the other into a neutrino pair. In the second, the production of the Higgs boson by WW fusion is tagged by detecting the quarks that produced the bremsstrahlung virtual W's. The associated Higgs decay is identified by one leptonic and one hadronic decay. Both methods appear capable of finding a heavy Higgs boson provided the SSC design parameters are achieved. 16 refs., 2 figs., 2 tabs.

An advanced concept, in-situ MHD conversion, is described for converting fusion energy to electricity. Considerable cost savings can be realized because of the conversion of thermal energy to electricity achieved in the blanket by means of magnetohydrodynamic (MHD) generators. The external disk generator, also described, is another application of the MHD idea, which may have certain advantages over the in-situ scheme for advanced-fuel tokamaks. The feature that makes these schemes fusion-specific is the novel use of the electro-magnetic radiation naturally emitted by the plasma. The synchrotron radiation can be used either to heat the nonequilibrium MHD plasma, or possibly improve its stability. A Rankine cycle with cesium-seeded mercury as a working fluid is used in either case. Performance predictions by a quasi-one-dimensional model are presented. An experiment to determine the effect of microwave radiation on channel performance is planned.

Rms emittance growth in the transverse plane due to the transverse combining of four identical elliptical beams of uniform density has been investigated. The emittance growth can be related by conservation of energy to the change in the electrostatic field energy. Its dependence on initial beam positions and radii has been calculated analytically for round beams and by computer simulation for elliptical beams.

Differences in elemental concentrations in bones taken from an ancient Egyptian mummy and a contemporary man were investigated by using proton induced x-ray emission (PIXE) in combination with Rutherford backscattering (RBS). Remarkable differences were noticed in the Fe/Ca and Pb/Ca relative concentrations, which were consistently higher in the contemporary man. 5 refs., 2 figs., 2 tabs.

An analytical procedure was developed to estimate the cooldown time between pulses of the Compact Ignition Tokamak (CIT) utilizing liquid nitrogen. Fairly good agreement was obtained between the analysis results and those measured in the early fusion experimental devices. The cooldown time between pulses in the CIT is controlled by the energy disposition in the inner leg of the TF coil. A cooldown time of less than one hour is feasible for the CIT if fins are used in the cooling channels. An R and D experimental program is proposed to determine the actual cooldown time between pulses since this would be considered an issue in the conceptual design of the CIT.