CDF top quark production and mass (open access)

CDF top quark production and mass

The top search in the dilepton and lepton plus jets channels with the Collider Detector at Fermilab is presented. The analysis uses a 67 pb{sup {minus}1} sample of p{bar p} collisions at 1.8 TeV. A 4.8{sigma} excess of candidate events establishes the existence of the top quark. The t{bar t} production cross section is measured to be {sigma}{sub t{bar t}} = 7.6{sub {minus}2.0}{sup +2.4} pb with branching Br(t {yields} Wb) = 0.87{sub {minus}0.30}{sup +0.13}(stat) {sub {minus}0.11}{sup +0.13}(syst). The measured mass is M{sub top} = 176{plus_minus}8{plus_minus}10 GeV.
Date: July 18, 1995
Creator: Incandela, J.
Object Type: Article
System: The UNT Digital Library
Efficient broadband third harmonic frequency conversion via angular dispersion (open access)

Efficient broadband third harmonic frequency conversion via angular dispersion

In this paper we present experimental measurements and theoretical modeling of third harmonic (3{omega}) conversion efficiency with optical bandwidth. Third harmonic conversion efficiency drops precipitously as the input bandwidth significantly exceeds the phase matching limitations of the conversion crystals. For Type I/Type II frequency tripling, conversion efficiency be-gins to decrease for bandwidths greater than {approximately}60 GHz. However, conversion efficiency corresponding to monochromatic phase-matched beams can be recovered provided that the instantaneous Propagation vectors are phase matched at all times. This is achieved by imposing angular spectral dispersion (ASD) on the input beam via a diffraction grating, with a dispersion such that the phase mismatch for each frequency is zero. Experiments were performed on the Optical Sciences Laser (OSL), a 1--100 J class laser at LLNL. These experiments used a 200 GHz bandwidth source produced by a multipassed electro-optic phase modulator. The spectrum produced was composed of discrete frequency components spaced at 3 GHz intervals. Angular dispersion was incorporated by the addition of a 1200 gr/mm diffraction grating oriented at the Littrow angle, and capable of rotation about the beam direction. Experiments were performed with a pulse length of 1-ns and a 1{omega} input intensity of {approximately} 4 GW/cm{sup 2} for …
Date: July 18, 1995
Creator: Pennington, D.M.; Henesian, M.A.; Milam, D. & Eimerl, D.
Object Type: Article
System: The UNT Digital Library
Recycler ring conceptual design study (open access)

Recycler ring conceptual design study

The Tevatron Collider provides the highest center of mass energy collisions in the world. To fully exploit this unique tool, Fermilab is committed to a program of accelerator upgrades for the purpose of increasing the Collider luminosity. Over the past 7 years the luminosity has been increased from a peak of 1.6{times}10{sup 30}cm{sup {minus}2}sec{sup {minus}1} in 1989 to over 3{times}10{sup 31}cm{sup {minus}2}sec{sup {minus}1} during 1995. The Main Injector will supply a larger flux of protons for antiproton production and more intense proton bunches for use in the Collider, and this is expected to increase the peak luminosity to close to 1{times}10{sup 32}cm{sup {minus}2}sec{sup {minus}1}. Further increases in luminosity will require additional upgrades to the Fermilab accelerator complex. This report documents the design of a new fixed-energy storage ring to be placed in the Main Injector tunnel which will provide an initial factor of 2 increase to 2{times}10{sup 32}cm{sup {minus}2}sec{sup {minus}1}, and ultimately provide the basis for an additional order of magnitude luminosity increase up to 1{times}10{sup 33}cm{sup {minus}2}sec{sup {minus}1}.
Date: July 18, 1995
Creator: Jackson, G.
Object Type: Report
System: The UNT Digital Library
San Antonio Monthly Reports: June 1995 [Part 2] (open access)

San Antonio Monthly Reports: June 1995 [Part 2]

Compilation of monthly reports from departments in the city of San Antonio, Texas providing statistics, project updates, and other information about services and activities.
Date: July 18, 1995
Creator: San Antonio (Tex.)
Object Type: Report
System: The Portal to Texas History
San Diego Wastewater Treatment: Current Issues (open access)

San Diego Wastewater Treatment: Current Issues

None
Date: July 18, 1995
Creator: Copeland, Claudia
Object Type: Report
System: The UNT Digital Library
Savannah River Site Patented Technologies Summaries (open access)

Savannah River Site Patented Technologies Summaries

This information represents SRS`s contribution of the DOE technology information network, an internet service coordinated out of Los Alamos. The information provided is strictly DOE-SR-titled and-issued patented technologies including environmental remediation, robotics, sensors, materials science, biomedical applications, hydrogen, and consumer products.
Date: July 18, 1995
Creator: Rabold, D. E.
Object Type: Report
System: The UNT Digital Library
Spring 1995 wildlife and vegetation survey, Norton Air Force Base, California (open access)

Spring 1995 wildlife and vegetation survey, Norton Air Force Base, California

The objectives of the 1994 and 1995 wildlife and vegetation surveys were to gather data to be used for various applications including: (1) basewide Environmental Risk Assessment (ERA) Work Plan (Scoping Document), (2) the completion of the basewide ERA, (3) determining remedial activities, and (4) determining the distribution of state and federal list plant and animal species on Norton AFB. Data gathering included an inventory of plant and animal species present, the identification of potential ecological receptors, mapping of habitats, and constructing the ecological food web present on or near the IRP sites of concern.
Date: July 18, 1995
Creator: unknown
Object Type: Report
System: The UNT Digital Library
A study of the relationship of geological formation to the NORM. Quarterly technical progress report, April 1--June 30, 1995 (open access)

A study of the relationship of geological formation to the NORM. Quarterly technical progress report, April 1--June 30, 1995

Naturally Occurring Radioactive Materials (NORM) is a common and costly contaminant of produced waters associated with natural gas production and exploration. One way of combating this problem is by identifying the problem beforehand. The approach to this problem involves development of NORM prediction capabilities based on the geological environment. During the third quarter of this project, emphasis was placed on three tasks; laboratory procedural development, continuance of preliminary geologic data acquisition, and the beginning of field testing of non-produced water sites. Laboratory procedures development included applications of pertinent EPA/Standard Methods, as well as continuing orientation with respect to radiation safety procedures and practices. In terms of progress on the geologic aspects of the project, compilation of relevant well data for the study area is in progress.
Date: July 18, 1995
Creator: Bursh, T.P. & Chriss, D.
Object Type: Report
System: The UNT Digital Library
Texas Register, Volume 20, Number 53, Part I, Pages 5095-5228, July 18, 1995 (open access)

Texas Register, Volume 20, Number 53, Part I, Pages 5095-5228, July 18, 1995

A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date: July 18, 1995
Creator: Texas. Secretary of State.
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History
Texas Register, Volume 20, Number 53, Part II, Pages 5231-5233, July 18, 1995 (open access)

Texas Register, Volume 20, Number 53, Part II, Pages 5231-5233, July 18, 1995

A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date: July 18, 1995
Creator: Texas. Secretary of State.
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History