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in subjects: "Fermilab Tevatron"

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A 3 TeV on 3 TeV proton-proton dedicated collider for Fermilab

The Fermilab Dedicated Collider proposed in May 1983 is a 2 TeV on 2 TeV p)bar p) collider. The expected luminosity is )approximately) 10/sup 31/ cm/sup (minus/2)sec/sup )minus/1) and the estimated cost is )approximately) $362M (FY-83 dollars). Since 1983 both the superconducting magnet and the particle detector technologies have advanced and the countenance of physics, hence the desired characteristics of new facilities have also altered somewhat. We want to show here that with the new magnet … more

Date: March 30, 1988

Creator: Teng, L.C.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Accelerating polarized beams in Tevatron

In this paper, we will examine the totality of equipment, manpower and cost necessary to obtain a polarized proton beam in the Tevatron. We will not, however, be concerned with the acquisition and acceleration of polarized /bar p/ beams. Furthermore we will consider only a planar main ring without overpass, although it is expected that Siberian snake schemes could be made to apply equally well to non-planar machines. In addition to not wanting to tackle here the task of reformulating the theory… more

Date: February 1, 1989

Creator: Teng, L.C.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Upgrading the Tevatron to a 1 TeV on 1 TeV pp collider

This report describes the tasks necessary to change the Tevatron into a proton-proton collider. Also included in the discussion is an estimate of the cost to carry out the modification. 4 figs., 3 tabs. (JDH)

Date: August 12, 1987

Creator: Teng, L.C.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Hard diffraction in CDF

We present Run I results on hard diffraction obtained by the CDF Collaboration in proton-antiproton collisions at the Fermilab Tevatron. They are compared with results from the DESY ep collider HERA and/or theoretical predictions to test factorization in hard diffraction. In addition, the CDF program for diffractive studies in Run II is presented briefly.

Date: July 12, 2002

Creator: Terashi, K.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Run II diffractive measurements at CDF

We present results on hard diffraction obtained by the CDF Collaboration in Run II proton-antiproton collisions at the Fermilab Tevatron. Run I CDF results on hard diffraction are also reviewed.

Date: September 17, 2003

Creator: Terashi, K.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Dijet production by double pomeron exchange at the Tevatron

The authors report the observation of dijet events with a Double Pomeron Exchange topology produced in {bar p}p collisions at {radical}s = 1,800 GeV. The events are characterized by a leading antiproton, two jets in the central pseudorapidity region, and a rapidity gap on the outgoing proton side. Results on kinematics, production rates, and comparisons with corresponding results from single diffractive and inclusive dijet production are presented.

Date: December 21, 2000

Creator: Terashi, Koji

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Exclusive e+e-, di-photon and di-jet production at the Tevatron

Results from studies on exclusive production of electron-position pair, di-photon, and dijet production at CDF in proton-antiproton collisions at the Fermilab Tevatron are presented. THe first observation and cross section measurements of exclusive e{sup +}e{sup -} and di-jet production in hadron-hadron collisions are emphasized.

Date: May 1, 2007

Creator: Terashi, Koji

Item Type: Article

Partner: UNT Libraries Government Documents Department

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New diffraction results from the Tevatron

We present new results from studies on diffractive dijet production and exclusive production of dijet and diphoton obtained by the CDF Collaboration in proton-antiproton collisions at the Fermilab Tevatron.

Date: May 1, 2006

Creator: Terashi, Koji

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Distributed data access in the sequential access model at the D0 experiment at Fermilab

The authors present the Sequential Access Model (SAM), which is the data handling system for D0, one of two primary High Energy Experiments at Fermilab. During the next several years, the D0 experiment will store a total of about 1 PByte of data, including raw detector data and data processed at various levels. The design of SAM is not specific to the D0 experiment and carries few assumptions about the underlying mass storage level; its ideas are applicable to any sequential data access. By def… more

Date: July 5, 2000

Creator: Terekhov, Igor & White, Victoria

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Beam induced backgrounds: CDF experience

We summarize the experiences of the Collider Detector at Fermilab (CDF) experiment in the presence of backgrounds originating from the counter circulating beams in the Fermilab Tevatron. These backgrounds are measured and their sources identified. Finally, we outline the strategies employed to reduce the effects of these backgrounds on the experiment.

Date: May 1, 2008

Creator: Tesarek, R. J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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2012 Update of the Combination of CDF and D0 Results for the Mass of the W Boson

We summarize and combine the results on the direct measurements of the mass of the W boson in data collected by the Tevatron experiments CDF and D0 at Fermilab. Earlier results from CDF Run-0 (1988-1989), D0 and CDF Run-I (1992-1995) and D0 results from 1 fb{sup -1} (2002-2006) of Run-II data are now combined with two new, high statistics Run-II measurements: a CDF measurement in both electron and muon channels using 2.2 fb{sup -1} of integrated luminosity collected between 2002 and 2007, and a… more

Date: April 1, 2012

Creator: Tevatron Electroweak Working Group,

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Precision Electroweak Measurements and Constraints on the Standard Model

This note presents constraints on Standard Model parameters using published and preliminary precision electroweak results measured at the electron-positron colliders LEP and SLC. The results are compared with precise electroweak measurements from other experiments, notably CDF and D0 at the Tevatron. Constraints on the input parameters of the Standard Model are derived from the combined set of results obtained in high-Q{sup 2} interactions, and used to predict results in low-Q{sup 2} experiment… more

Date: December 11, 2009

Creator: The , ALEPH, CDF, D0, ...

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Search for squarks and gluinos in p{bar p} collisions at the D0 detector with the jets and missing energy signature

A search for squarks and gluinos has been performed using the D{null} detector at {radical}s = 1.8 TeV Tevatron {ital p{anti p}} collider. Data from the 1992-1993 collider run corresponding to an integrated luminosity of 13.5 pb{sup -1} were examined via the missing {ital E{sub T}} plus jets signature with two separate analyses. No events above the Standard Model backgrounds were observed.

Date: September 1, 1996

Creator: The DO Collaboration

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Tevatron lower temperature operation

This year saw the completion of three accelerator improvement projects (AIP) and two capital equipment projects pertaining to the Tevatron cryogenic system. The projects result in the ability to operate the Tevatron at lower temperature, and thus higher energy. Each project improves a subsystem by expanding capabilities (refrigerator controls), ensuring reliability (valve box, subatmospheric hardware, and compressor D), or enhancing performance (cold compressors and coldbox II). In January of 1… more

Date: July 1, 1994

Creator: Theilacker, J. C.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Diffusion of gases in air and its affect on oxygen deficiency hazard abatement

Density differences between air and released gases of cryogenic systems have been used to either require special oxygen deficiency hazard (ODH) control measures, or as a means of abatement. For example, it is not uncommon to assume that helium spills will quickly collect at the ceiling of a building or enclosure and will efficiently exit at the nearest vertical penetration or vent. Oxygen concentration reduction was found to be detectable during a localized helium spill throughout the entire 6.… more

Date: September 1, 2005

Creator: Theilacker, J. C. & White, M. J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Cryogenic testing and analysis associated with Tevatron lower temperature operation

An upgrade of the Tevatron cryogenic system was installed and commissioned in 1993 to allow lower temperature operation. As a result, higher energy operation is possible. Following the installation and initial commissioning, it was decided to continue the current colliding beam physics at the previous energy of 900 GeV. This has allowed us to perform parasitic lower temperature tests in the Tevatron over the last year and a half. This paper presents the results of operational experiences and th… more

Date: September 1, 1996

Creator: Theilacker, J.C.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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An investigation into flow regimes for two-phase helium flow

The Tevatron accelerator at Fermilab incorporates long two-phase helium passages. During magnet design, the generalized flow map of Baker was used to predict homogeneous flow. Longer than expected magnet time constants led to this investigation. The importance of predicting the flow regime has been amplified with the advent of non-horizontal accelerator designs. A test setup was constructed at Fermilab to investigate two-phase helium flow regimes for conditions practical in accelerator designs.… more

Date: October 1, 1987

Creator: Theilacker, J.C. & Rode, C.H.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Tevatron higher energy testing

A cryogenic system upgrade was installed in 1993 to lower the temperature of the Tevatron in order to achieve higher operating energies. Centrifugal cold helium vapor compressors were used to lower the temperature of the two-phase circuit of the Tevatron. A cold compressor (CC) is used at each of the twenty-four satellite refrigerators, allowing each satellite to be individually tuned to the temperature necessary for the magnets. Initial testing took place in December, 1993 and January, 1994. D… more

Date: October 1, 1995

Creator: Theilacker, Jay

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Twenty Years of Tevatron Operation

The superconducting Tevatron accelerator at Fermi National Accelerator Laboratory (Fermilab) has surpassed twenty years of operation. The Tevatron is still the highest energy particle accelerator in the world and will remain so until the commissioning of the LHC in Europe later this decade. The Tevatron has operated in a Fixed Target mode, accelerating a proton beam into stationary targets/detectors, as well as a Colliding Beam mode, continuously colliding counter rotating beams of protons and … more

Date: July 15, 2004

Creator: Theilacker, Jay C.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Thermal modeling of the Tevatron magnet system

Operation of the Tevatron at lower temperatures, for the purpose of allowing higher energies, has resulted in a renewed interest in thermal modeling of the magnet strings. Static heat load and AC loses in the superconducting coils are initially transported through subcooled liquid helium. Heat exchange between the subcooled liquid and a counter flowing two-phase stream transfers the load to the latent heat. Stratification of the two-phase helium stream has resulted in considerably less heat exc… more

Date: July 20, 2004

Creator: Theilacker, Jay C. & Klebaner, Arkadiy L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Top physics at CDF

Precision studies of top quark properties are a primary goal of the Run II physics program at the Fermilab Tevatron. Marking the first stages of this program, the CDF collaboration presents recent results on top pair production cross section, single top physics and top mass, using between 109 and 200 pb{sup -1} of Run II data.

Date: June 24, 2004

Creator: Thom, Julia

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Observation of the top quark

The D0 collaboration reports on a search for the Standard Model top quark in p{bar p} collisions at {radical}s = 1.8 TeV at the Femlilab Tevatron, with an integrated luminosity of approximately 50 pb{sup {minus}1}. We have searched for t{bar t} production in the dilepton and single-lepton decay channels, with and without tagging of b quark jets. We observe 17 events with an expected background of 3.8 {plus_minus} 0.6 events. The probability for an upward fluctuation of the background to produce… more

Date: May 1, 1995

Creator: Thompson, J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Progress in top quark physics

Experimental measurements of the properties of the top quark have improved and will continue to improve significantly, with the excellent operation of the CDF and D0 experiments and the Tevatron p{bar p} collider at the Fermi National Accelerator Laboratory. All of the final state experimental signatures from top quark production and decay are being analyzed to test if this most massive quark is sensitive to new physics beyond the standard model. So far, observations are consistent with the sta… more

Date: February 1, 2006

Creator: Thomson, Evelyn J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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The measurement of the mass of the W boson from the Tevatron.

This paper presents measurements of the mass of the W vector boson from the CDF and D0 experiments using data collected at {radical}s = 1.8 TeV during the 1994-1995 data taking run. CDF finds a preliminary mass of M{sub W} = 80.43 {+-} 0.16 GeV and D0 measures a mass of M{sub W} = 80.44 {+-} 0.12 GeV.

Date: August 10, 1999

Creator: Thurman-Keup, R.

Item Type: Article

Partner: UNT Libraries Government Documents Department