The data acquisition system of the DELPHI experiment at LEP allows the recording of data from the front-end electronics of 15 different detectors housed in about 100 Fastbus crates. Each detector has ...the possibility of monitoring its data in parallel with the global data acquisition as well as of running in a stand-alone mode. A description is presented of the design of the system and the performance achieved so far. Emphasis is given to the readout system, and an overview is provided of the systems for control and monitoring.< >
Holography has been used successfully in combination with conventional optics for the first time in a large cryogenic bubble chamber, the 15-foot bubble chamber at Fermilab, during a physics run. The ...innovative system combined the reference beam with the object beam, irradiating a conical volume of ∼1.4
m
3. Bubble tracks from neutrino interactions with a width of ∼120
μm have been recorded with good contrast. The ratio of intensities of the object light to the reference light striking the film is called the beam branching ratio. We obtained in our experiment an exceedingly small minimum-observable ratio of (0.54±0.21)×10
−7. The technology has the potential for a wide range of applications.
J.Phys.G24:405-419,1998 The working group discussed several aspects of triple gauge coupling analysis
viewed in the light of experiences with the first high energy data recorded at
energies above the ...W pair threshold. Some analysis methods were reviewed
briefly, and consideration given to better ways of characterising the data. The
measurement of CP violating parameters was discussed. Results were prepared to
further quantify the precision attainable on anaomalous couplings in the
four-quark channel using jet-charge methods, and finally the trade off between
maximum LEP energy-vs-luminosity was quantified.
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