The DO collaboration is completing production of a 793 000 channel silicon strip tracking system for the DO upgrade. The tracker consists of 768 ladder and wedge assemblies including both single- and ...double-sided detectors. The production process includes burn-in of electronics, mechanical assembly under coordinate measuring machines, wire bonding, repair of bad channels, detector burn-in, laser testing, and final assembly. We describe observed failure modes of the detectors, including microdischarge and lithography defects. We present results of the production and testing process and describe the anticipated performance of the detector. Lessons for future production of large-scale tracking systems are discussed.
Luminosity measurement in the L3 detector at LEP Brock, I.C.; Engler, A.; Ferguson, T. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
11/1996, Letnik:
381, Številka:
2
Journal Article
Recenzirano
Odprti dostop
One of the limiting factors in the determination of the electroweak parameters from cross section measurements of e
+e
− annihilation close to the Z pole is the precision of the luminosity ...measurement. The luminosity monitor of the L3 detector at LEP and the analysis of its data are described. Using a combination of a BGO calorimeter and a 3-layer silicon tracker, the absolute luminosity has been measured with an experimental precision of 0.08% in 1993 and 0.05% in 1994. The measurement relies on a detailed understanding of small-angle elastic e
+e
− (Bhabha) scattering from the experimental and theoretical point of view, as well as an excellent knowledge of the detector geometry.
The Muon Ionization Cooling Experiment (MICE) collaboration seeks to demonstrate the feasibility of ionization cooling, the technique by which it is proposed to cool the muon beam at a future ...neutrino factory or muon collider. The emittance is measured from an ensemble of muons assembled from those that pass through the experiment. A pure muon ensemble is selected using a particle-identification system that can reject efficiently both pions and electrons. The position and momentum of each muon are measured using a high-precision scintillating-fibre tracker in a 4 T solenoidal magnetic field. This paper presents the techniques used to reconstruct the phase-space distributions in the upstream tracking detector and reports the first particle-by-particle measurement of the emittance of the MICE Muon Beam as a function of muon-beam momentum.
Performance of the MICE diagnostic system Bogomilov, M.; Tsenov, R.; Vankova-Kirilova, G. ...
Journal of instrumentation,
08/2021, Letnik:
16, Številka:
8
Journal Article
A novel single-particle technique to measure emittance has been developed and used to characterise seventeen different muon beams for the Muon Ionisation Cooling Experiment (MICE). The muon beams, ...whose mean momenta vary from 171 to 281 MeV/
c
, have emittances of approximately 1.2–2.3
π
mm-rad horizontally and 0.6–1.0
π
mm-rad vertically, a horizontal dispersion of 90–190 mm and momentum spreads of about 25 MeV/
c
. There is reasonable agreement between the measured parameters of the beams and the results of simulations. The beams are found to meet the requirements of MICE.
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