109583813
Application of advanced thermal management technologies to the ATLAS SCT barrel module baseboards
Abstract The paper describes the application of advanced thermal management technologies to the design and production of the barrel module baseboard of the SemiConductor Tracker (SCT) of the ATLAS experiment at the Large Hadron Collider (LHC). The barrel modules contain silicon microstrip sensors and readout ASICs for tracking charged particles, and the baseboard forms the central element of the module, providing both its necessary thermal management and its mechanical structure. The baseboard requirements and specifications are given, and design and fabrication details are described. The properties of the 3000 baseboards successfully produced for the SCT are summarised.
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.
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.
122392894
New values of pion-nucleon scattering lengths and f2
Abstract From fixed t dispersion relations we have obtained more accurate values for the pion nucleon coupling constant and s -wave scattering lengths, using our recent low energy πN angular distribution and total cross section data. The results are: f 2 = 0.0790 ± 0.0010, a 1 − a 3 = 0.262 ± 0.004 μ −1 , a 1 + 2 a 3 = − 0.014 ± 0.005 μ −1 .
125004264
Measurement of polarization in K−p elastic scattering between 0.955 GeV/c and 1.272 GeV/c
The polarization parameter has been measured for K−p elastic scattering at nine incident beam momenta between 0.955 and 1.272 GeV/c covering the c.m. angular range −0.9 < cos θ∗ < + 0.9. Experimental results and coefficients of Legendre polynomial fits to the data are presented and compared with other measurements and a partial-wave analysis.
114761799
Novel thermal management structures and their applications in new hybrid technologies and feed-through structures
126117538
Polarization of Prompt Muons
The polarization of 185-GeV prompt muons produced in the forward direction by the interaction of 400-GeV protons has been measured to be P=0.00 +- 0.10 along their direction of flight. The null value for the polarization suggests that the muons are produced through electromagnetic interactions. (AIP)
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)