[en] The Indiana University Task C group is participating in the experiments GEM at the SSC and MACRO at the Gran Sasso. After an introduction to GEM in paragraph II, a detailed report is presented on the work done during the current contract period on the design of the outer region of the GEM Central Tracker. The Central Tracker Monte Carlo, which was the other significant GEM activity by the group, is included. In paragraph III is introduced MACRO and a brief status report is given. Muon Astronomy analysis done using MACRO data is also presented

[en] We are participating in the experiments GEM at the SSC and MACRO at the Gran Sasso. After introducing GEM in chapter II, we present some results from GEM work we have done during the current contract period. Other significant GEM activities by our group such as participation in the evolution of GEM (as founding fathers), GEM proposal writing, and the design of GEM electronics for the Interpolating Pad Chambers for the Central Tracker are not included in this report.In chapter III we introduce MACRO and give a brief status report. Instead of a survey of our many ongoing contributions to MACRO, we choose in this technical report to concentrate on reporting results of some MACRO data analysis headed by our group (with important contributions by our collaborators, of course). This analysis, in chapter IV, concerns Point Sources

[en] UK experience over the last thirty years with the design and implementation of equipment for the management of spent fuels and radioactive wastes has ranged from remote handling, through encapsulation and containerisation, to the medium-term storage of heat-producing fuels and wastes in the dry state. The design principles involved in handling, transporting and storing hazardous materials safely and reliably, while ensuring biological shielding, containment and cooling of radioactive materials, are common to the various kinds of equipment presented in this paper, even though the individual requirements may be very different. The UK nuclear programme over the last thirty years has encouraged the development of extensive expertise in the engineering of equipment for the management of spent fuel and radioactive waste. This expertise can be applied with benefit to the Korean nuclear programme

[en] We describe a method of assessing and optimizing the de-wetting properties of a lyophobic substrate by using a sliding liquid drop to determine the maximum speed of de-wetting of an aqueous liquid on a range of lyophobic surfaces. The sliding drop method has direct relevance to the use of surface energy patterns on flexible substrates, to create discrete liquid patterns in a continuous, roll-to-roll manner. Surface energy patterning makes use of a substrate pre-patterned with lyophilic and lyophobic regions which is over-coated with a liquid; the liquid withdraws from the lyophobic areas and collects on the lyophilic ones. The overall speed of the patterning process is determined by the rate with which liquid de-wets from the lyophobic regions and is therefore a strong function of the static advancing contact angle. However, measurement of the static contact angle alone is not enough to fully characterize the de-wetting behaviour on a range of different lyophobic materials. In contrast, the sliding drop method depends upon the dynamic contact angle of a liquid as it de-wets, and so allows for a direct measurement of the maximum speed of de-wetting of a given liquid on a particular surface. Use of the technique to screen a range of lyophobic materials applied by different methods to determine their suitability for surface energy patterning is shown

[en] We present the concept and design of a liquid scintillator detector for a long-baseline neutrino oscillation experiment. Neutrinos interact in 2.5 cm thick steel plates alternating with 2.0 cm thick planes of liquid scintillator. The scintillator is contained in multicell PVC extrusions containing individual 2 cmx3 cm cells up to 8 m long. Readout of the scintillation light is via wavelength-shifting fibers which transport light to pixellated photodetectors at one end of the cells

[en] We report the results of various tests undertaken in a program to develop a drift tube hodoscope for a cosmic ray balloon experiment intended to search for extragalactic antimatter. Included are studies of mechanical integrity, electron drift velocity, tube gain, space charge saturation effects as measured for relativistic iron nuclei, and delta ray backgrounds associated with signals from iron projectiles. Implications of the results of these studies with regard to the use of drift tubes on balloon borne experiments are discussed. It is found that a spatial resolution of sigmaproportional300 μm can be achieved over a dynamic range from Z=20 to 30 with little degradation from delta ray effects for suitably chosen tube gains and discriminator threshold settings. (orig.)

[en] We are reporting preliminary results of studies of R59000-00-M16 and M64 tubes, manufactured by Hamamatsu Photonics, to be employed by the MINOS neutrino experiment. Our tests focused on anode response uniformity, gain, cross-talk, and linearity for light illuminating PMTs through a 1.2 mm diameter fiber

[en] We present a new measurement of the cosmic-ray positron fraction at energies between 5 and 15 GeV with the balloon-borne HEAT-p-bar instrument in the spring of 2000. The data presented here are compatible with our previous measurements, obtained with a different instrument. The combined data from the three HEAT flights indicate a small positron flux of nonstandard origin above 5 GeV. We compare the new measurement with earlier data obtained with the HEAT-e^± instrument, during the opposite epoch of the solar cycle, and conclude that our measurements do not support predictions of charge sign dependent solar modulation of the positron abundance at 5 GeV

[en] The NOvA collaboration blended and delivered 8.8 kt (2.72M gal) of liquid scintillator as the active detector medium to its near and far detectors. The composition of this scintillator was specifically developed to satisfy NOvA's performance requirements. A rigorous set of quality control procedures was put in place to verify that the incoming components and the blended scintillator met these requirements. The scintillator was blended commercially in Hammond, IN. The scintillator was shipped to the NOvA detectors using dedicated stainless steel tanker trailers cleaned to food grade

[en] A wide field space-based imaging telescope is necessary to fully exploit the technique of observing dark matter via weak gravitational lensing. This first paper in a three part series outlines the survey strategies and relevant instrumental parameters for such a mission. As a concrete example of hardware design, we consider the proposed Supernova/Acceleration Probe (SNAP). Using SNAP engineering models, we quantify the major contributions to this telescope's Point Spread Function (PSF). These PSF contributions are relevant to any similar wide field space telescope. We further show that the PSF of SNAP or a similar telescope will be smaller than current ground-based PSFs, and more isotropic and stable over time than the PSF of the Hubble Space Telescope. We outline survey strategies for two different regimes - a ''wide'' 300 square degree survey and a ''deep'' 15 square degree survey that will accomplish various weak lensing goals including statistical studies and dark matter mapping