Design and construction of the wire chambers for the LHCb muon system

The LHCb muon system will use Multi-Wire Proportional Chambers (MWPC) in all regions with a particle flux between 1KHz/cm2 and 100 kHz/cm2. After an overview of the chamber requirements and specifications, the design and construction procedures including the quality control of the detector system are described. The electrical layout is discussed and finally the cost breakdown and the construction schedule is presented

Design and construction of the wire chambers for the LHCb muon system

The LHCb muon system will use Multi-Wire Proportional Chambers (MWPC) in all regions with a particle flux between 1KHz/cm2 and 100 kHz/cm2. After an overview of the chamber requirements and specifications, the design and construction procedures including the quality control of the detector system are described. The electrical layout is discussed and finally the cost breakdown and the construction schedule is presented

A Contextual Analysis of Electoral Participation Sequences

This chapter presents an ongoing research project based on a seldom-used and particularly interesting source for the longitudinal, multilevel study of electoral participation: signature lists. We have been able to observe turnout in 44 ballots in one French polling station in the Paris region, between 1982 and 2007 (ca. 30,000 acts of turnout or abstention) and to link turnout data with various attributes of voters. We used sequence analysis to emphasize the correlation of participation patterns inside “electorate households” and to study the effect on turnout of the individual position in these households. This chapter discusses the ways in which this type of data and sequence methods makes it possible to take into account not only this social context of electoral participation, but also its temporal and political contexts. More generally, it exemplifies the uses of peculiar sequence data, with a very limited set of possible states but many dimensions to analyze

Measurements of atmospheric muon neutrino oscillations, global analysis of the data collected with MACRO detector

The final analysis of atmospheric neutrino events collected with the MACRO detector is presented. Three different classes of events, generated by neutrinos in different energy ranges, are studied looking at rates, angular distributions and estimated energies. The results are consistent for all the subsamples and indicate a flux deficit that depends on energy and path - length of neutrinos. The no - oscillation hypothesis is excluded at similar to 5sigma, while the hypothesis of nu(mu) --> nu(tau) oscillation gives a satisfactory description of all data. The parameters with highest probability in a two flavor scenario are sin(2) 2theta(m) = 1 and Deltam(2) = 0.0023 eV(2). This result is independent of the absolute normalization of the atmospheric neutrino fluxes. The data can also be used to put experimental constrain on this normalization