57 research outputs found
Beam Halo Monitoring at CDF
Losses from the proton and antiproton beams of the Fermilab Tevatron have
been shown to produce a halo which contribute to backgrounds to physics signals
in the Collider Detector at Fermilab (CDF). To provide a measure of the beam
halo and losses, we have installed arrays of scintillation counters on both
sides of the CDF detector. We describe here the physical configuration of these
counters, their implementation and performance within the Fermilab Accelerator
Control Network (ACNET). We show correlations between these new devices and the
accelerator operating conditions. We point out that the use of these monitors
is leading to improvement in the accelerator operations and reduced backgrounds
in CDF.Comment: 27 pages, 17 figures, submitted to NIM
Measurement of the radiation field surrounding the Collider Detector at Fermilab
We present here the first direct and detailed measurements of the spatial
distribution of the ionizing radiation surrounding a hadron collider
experiment. Using data from two different exposures we measure the effect of
additional shielding on the radiation field around the Collider Detector at
Fermilab (CDF). Employing a simple model we parameterize the ionizing radiation
field surrounding the detector.Comment: PDF document, 5 pages, including 10 encapsulated postscript figures:
Proceedings for the IEEE/NSS-MIC 2003 Conference, Portland, Oregon, October
19-25, 200
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Single event effects and their mitigation for the Collider Detector at Fermilab
We present an overview of radiation induced failures and operational experiences from the Collider Detector at Fermilab (CDF). In our summary, we examine single event effects (SEE) in electronics located in and around the detector. We present results of experiments to identify the sources and composition of the radiation and steps to reduce the rate of SEEs in our electronics. Our studies have led to a better, more complete understanding of the radiation environment in a modern hadron collider experiment
Measurement of charged-particle multiplicities in gluon and quark jets in p(p)over-bar collisions at root s=1.8 TeV
We report the first largely model independent measurement of charged particle multiplicities in quark and gluon jets, N-q and N-g, produced at the Fermilab Tevatron in p (p) over bar collisions with a center-of-mass energy of 1.8 TeV and recorded by the Collider Detector at Fermilab. The measurements are made for jets with average energies of 41 and 53 GeV by counting charged particle tracks in cones with opening angles of θ(c)=0.28, 0.36, and 0.47 rad around the jet axis. The corresponding jet hardness Q=E-jetθ(c) varies in the range from 12 to 25 GeV. At Q=19.2 GeV, the ratio of multiplicities r=N-g/N-q is found to be 1.64± 0.17, where statistical and systematic uncertainties are added in quadrature. The results are in agreement with resummed perturbative QCD calculations
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