The CDF calorimeter upgrade for Run IIb Kuhlmann, S.; Frisch, H.; Cordelli, M. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
02/2004, Letnik:
518, Številka:
1
Journal Article
Recenzirano
Odprti dostop
The physics program at the Fermilab Tevatron Collider will continue to explore the high-energy frontier of particle physics until the commissioning of the LHC at CERN. The luminosity increase ...provided by the Main Injector will require upgrades beyond those implemented for the first stage (Run IIa) of the Tevatron's Run II physics program. The upgrade of the CDF calorimetry includes: (1) the replacement of the slow gas detectors on the front face of the Central Calorimeter with a faster scintillator version which has a better segmentation, and (2) the addition of timing information to both the Central and EndPlug Electromagnetic Calorimeters to filter out cosmic ray and beam related backgrounds.
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.
A search for supersymmetry involving the pair production of gluinos decaying via third-generation squarks to the lightest neutralino (chi) over tilde (0)(1) is reported. It uses an LHC proton-proton ...data set at a center-of-mass energy root s = 13 TeV with an integrated luminosity of 3.2 fb(-1) collected with the ATLAS detector in 2015. The signal is searched for in events containing several energetic jets, of which at least three must be identified as b jets, large missing transverse momentum, and, potentially, isolated electrons or muons. Large-radius jets with a high mass are also used to identify highly boosted top quarks. No excess is found above the predicted background. For (chi) over tilde (0)(1) masses below approximately 700 GeV, gluino masses of less than 1.78 TeVand 1.76 TeV are excluded at the 95% C. L. in simplified models of the pair production of gluinos decaying via sbottom and stop, respectively. These results significantly extend the exclusion limits obtained with the root s = 8 TeV data set.
Design and performance tests of the CDF time-of-flight system Paus, Ch; Grozis, C.; Kephart, R. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
04/2001, Letnik:
461, Številka:
1
Journal Article
Recenzirano
The CDF
II detector contains a time-of-flight detector consisting of 216 scintillator bars of 279
cm length and 4×4
cm
2 cross-section located at a radius of 138
cm from the beam axis. The bars are ...installed on the inner surface of the CDF solenoid, which produces an axial field of 1.4
T. Nineteen-stage fine-mesh photomultiplier tubes are attached at both ends of the scintillator bars. Photostatistics limit the time-of-flight resolution, which is expected to be 100
ps. The primary physics motivation is K
± identification for improved neutral B meson flavor determination.
This paper reports on a test time-of-flight (TOF) system that operated in the Collider Detector at Fermilab (CDF) during
p
p
̄
Tevatron collider operation at
s
=1.8
TeV in the fall 1995 running ...period. The TOF system consisted of 20
130×4×4
cm
3
long Bicron BC408 scintillator bars, with each end of the bars fitted with a small compound parabolic concentrator and a 16-stage R5946 Hamamatsu fine-mesh photomultiplier. The electronics chain consisted of a custom designed preamplifier, constant fraction discriminator, and commercial TDC and ADC FASTBUS modules read out with the CDF data acquisition system. The counters were installed between the Central Tracking Chamber and the 1.4 T superconducting solenoid at a mean radius of 140 cm. We report a procedure for calculating the
t
0 time from all tracks in an event, the timing resolution, and the particle identification performance of this system.
A Time-of-Flight detector in CDF-II Acosta, D.; Ahn, M.; Anikeev, K. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
02/2004, Letnik:
518, Številka:
1
Journal Article
Recenzirano
A Time-of-Flight (TOF) 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
̄
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.
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