The CDFII time-of-flight detector and impact on beauty flavor tagging

Following the successful RunI from 1992 to 1996, the CDF detector has undergone a major upgrade [1] for the RunII which begun in March 2001. The approval for the addition of a Time-of-Flight detector was granted in January 1999. The installation of the TOF detector was completed in August 2001 and its data has been included in the CDFII readout since then. The primary physics motivation for TOF is to complement and enhance the particle identification capability provided by the central drift chamber (COT) since it distinguishes K{sup {+-}} and {pi}{sup {+-}} in the momentum region of their cross-over in dE=dX. With an expected time-of-flight resolution of 100 ps, the TOF system will be capable of identifying charged kaons from pions by their flight time difference with at least two standard deviation separation up to kaon momenta of 1.6 GeV/c. Such an addition results in an enhancement of the b flavor identification power, crucial to improve the statistical precision in CP violation and B{sub s} mixing measurements

Test results and design details of the Tohoku Bubble Chamber magnet

Fermilab has successfully tested an iron bound 3 Tesla superconducting solenoid for the Tohoku Bubble Chamber. Thermal performance, magnetic fields, charging characteristics, and a special Ni30%Fe dump resistor are reported. Low heat leak is obtained by thermally intercepting the supports with boiloff gas. 4 refs., 5 figs

A Time-of-Flight detector in CDF-II

A Time-of-Flight (TOE) detector.. based on plastic scintillators and fine-mesh photomultipliers, has been added to the Collider Detector at Fermilab (CDF)-II experiment at the Tevatron p (p) over tilde collider. The primary physics motivation is to provide charged kaon identification to improve neutral B meson flavor determination. Besides that, the TOF detector found application in the CDF trigger system in implementation of highly ionizing particle, high multiplicity and cosmic rays triggers. (C) 2003 Elsevier B.V. All rights reserved. RI De Cecco, Sandro/B-1016-201