CDF Central Outer Tracker Affolder, T; Allspach, D; Ambrose, D ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
07/2004, Letnik:
526, Številka:
3
Journal Article
Recenzirano
The Central Outer Tracker is a large cylindrical drift chamber constructed to replace Collider Detector at Fermilab's original central drift chamber for the higher luminosity expected for Run 2 at ...the Fermilab Tevatron. The chamber's drift properties are described in the context of meeting the operating requirements for Run 2. The design and construction of the chamber, the front-end readout electronics, and the high-voltage system are described in detail. Wire aging considerations are also discussed.
The Technical Design Report for the CDF II Detector calls for the development of an imbedded two-dimensional position sensitive detector sandwiched inside the electromagnetic calorimeter and placed ...at the shower maximum. The purpose of this detector is to aid in the identification of electrons and photons, to separate photons from /spl pi//sup 0/s, and to help identify electromagnetic showers. This detector is called the Shower Max. In order to achieve CDF's goals for resolution, timing, power and economy, as well as to fit into the available space, a full-custom integrated circuit was required for the project the SMQIE. The SMQIE has been fabricated in a 1.2 /spl mu/m CMOS process using vertical NPN transistors in critical areas. It operates without deadtime. Its QIEs have eight ranges and an overall dynamic range of 13 bits. Its FADCs have a 5-bit resolution with a nominal LSB of 31.25 mV. Its Level 1 Trigger delays are 42 beam crossings or approximately 5.5 /spl mu/s. Its data buffers hold up to four events, each of which can consist of four time slices. Finally, the chip accepts a maximum input charge up to 150 pC with a minimum resolution of 15 fC.
The CDF Shower Maximum Electronics is part of the upgraded data acquisition system for the CDF experiment at Fermilab. The system services five detector subsystems of the calorimeter, and ...accommodates the different properties and data processing requirements imposed by each of them. The electronics is built around a custom integrated circuit called the SMQIE, which produces floating-point data with no dead-time using a 7.6-MHz clock. The components of the system are described, along with the principles of operation for performing data acquisition, calibration, and diagnostics.
W boson physics at hadron colliders Thurman-Keup, Randy M.; Kotwal, Ashutosh V.; Tecchio, Monica ...
Reviews of modern physics,
4/2001, Letnik:
73, Številka:
2
Journal Article
The Technical Design Report for the CDF II Detector calls for the development of an imbedded two-dimensional position sensitive detector sandwiched inside the electromagnetic calorimeter and placed ...at the shower maximum. The purpose of-this detector is to aid in the identification of electrons and photons, to separate photons from /spl pi//sup 0/s, and to help identify electromagnetic showers. This detector is called the Shower Max. In order to achieve CDF's goals for resolution, timing, power and economy, as well as to fit into the available space, a full-custom integrated circuit was required for the project-the SMQIE. The SMQIE has been fabricated in a 1.2 /spl mu/m CMOS process using vertical NPN transistors in critical areas. It operates without deadtime. Its QIEs have eight ranges and an overall dynamic range of 13 bits. Its FADCs have a 5-bit resolution with a nominal LSB of 31.25 mV. Its level 1 trigger delays are 42 beam crossings or approximately 5.5 /spl mu/s. Its data buffers hold up to four events, each of which can consist of four time slices. Finally, the chip accepts a maximum input charge up to 150 pC with a minimum resolution of 15 fC.
The radiation hardness properties of a tile/fiber calorimeter with different materials or with different optical path layouts have been studied. Ten calorimeter modules of a geometry similar to that ...of the proposed SDC calorimeter were irradiated using the BEPC electron beam (1.1 or 1.3 GeV). Radiation damage was quantified by measuring the light yield at various locations within the calorimeter modules at different integrated doses. The recovery process and the dependence on the ambient atmosphere were also studied and correction techniques for various dose and depth profiles were developed.
We report limits on anomalous ital ZZgamma and ital Zgammagamma couplings derived from an analysis of ital Z+photon production based upon approximately 20pbsup minus1 of the bar p collision data ...recorded by the Collider Detector at Fermilab. We observe good agreement with the standard model expectation that all ital Zgamma couplings are zero. Confidence level intervals for individual couplings and contours for pairs of ital CP-conserving/violating ital ZZgamma and ital Zgammagamma couplings are presented.
We report on a study of ital W+ photon production in approximately 20 pbsup minus1 of ital pminusital bar p collisions at radicalital s=1.8 TeV recorded with the Collider Detector at Fermilab. Our ...results are in good agreement with standard model expectations and are used to obtain limits on anomalous ital CP-conserving ital WWgamma couplings of minus2.3ltDeltakappalt2.2 for lambda=0 and minus0.7ltlambdalt0.7 for Deltakappa=0 at 95% C.L. We obtain the same limits for ital CP-violating couplings. These results provide limits on the higher-order electromagnetic moments of the ital W boson of 0.8ltital gsub ital Wlt3.1 for ital qsup ital esub ital W=1 and minus0.6ltital qsup ital esub ital Wlt2.7 for ital gsub ital W=2 at 95% C.L.
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