123579966
The total cross-sections for pion-proton scattering between 70 mev and 290 mev
Abstract Measurements have been made of the π ∓ proton total cross sections over the laboratory kinetic energy range 70 to 290 MeV. The absolute accuracy of the data is generally 0.5 %, but decreases to 1 % for some points where applied corrections are large or where low particle fluxes limit the statistical accuracy. The parameters of the Δ 0 , Δ ++ resonance have been calculated, and a discussion is included on the limitations placed by Coulomb barrier effects on extracting the basic nuclear phase shifts from data in this energy region.
114761799
Novel thermal management structures and their applications in new hybrid technologies and feed-through structures
109327315
Junction depth dependence of breakdown in silicon detector diodes
Abstract The high voltage capability of detector diodes fabricated in the planar process is limited by the high field generated at the edge of the junction. We have fabricated diodes with increased junction depth with respect to our standard process and find a significantly higher breakdown voltage, in reasonable agreement with previous studies of junction breakdown.
120133715
Comparison of signals obtained from oxygenated and non-oxygenated silicon microstrip detectors after irradiation to 3×1014 p cm−2
Abstract Full size silicon microstrip detectors have been prototyped for the LHC and fabricated on both oxygenated and non-oxygenated substrate material. The detectors were irradiated with protons to 3×10 14 p cm −2 and their signals compared as a function of bias voltage after short-term and long-term annealing.
121849522
The design and calibration of precision drift chambers for use in a gluonium search experiment at the CERN ISR
We describe the design, construction and calibration of a set of high precision drift chambers. The precise coordinate (σ ∼ 120 μm) is determined by drift time measurement, with the orthogonal coordinate given by the charge division method (σ∼1.2 mm). The chambers have been calibrated using a well-defined laser beam. Their use within a gluonium search experiment at the CERN ISR is also described.
119881709
A comparative study of oxygenated and non-oxygenated Si pad diodes, miniature and large area microstrip detectors
Abstract Large area and miniature microstrip detectors were processed by Micron Semiconductor Ltd on oxygenated silicon and non-oxygenated material. The pre-irradiation and post-irradiation IV and inter-strip capacitance values all agree between the control devices and those with enhanced oxygen. After irradiation, the capacitance-voltage (CV) derived depletion voltage for the oxygenated detector is lower than that for the control device. However, the difference appears less marked than is typically seen with diodes. The charge collection properties were studied with 1064 nm laser and minimum ionising electrons (m.i.p.'s) from a 106 Ru source, with a good agreement between light-spot and source data. We found evidence for improvement in oxygenated detectors from this run with this supplier but again, not as pronounced as might be expected from the diode studies.
13865686
CP Violation in Cascade Decays of B Mesons
General techniques are introduced to expose new CP-nonconserving effects in cascade decays of B mesons. These effects are computed in the Kobayashi-Maskawa model. The CP asymmetries so obtained range from 2% to 20% if the parameters are in the favorable range s/sub 3/
121068358
Production of prompt muons in the forward direction by 400-GeV proton interactions
The ratio of prompt negative muons to negative pions produced in the forward direction by the interaction of 400-GeV protons on copper has been determined to be 5.8times10$sup -5$ for 55-GeV muons, 3.05times10$sup -5$ for 102- GeV muons, and 1.93times10$sup -5$ for 230-GeV muons. The ratio of prompt positive muons to negative muons was about 1. (AIP)