Attempts to measure high electron beam brightness at low values of beam energy are plagued by the effects of space charge forces. These forces can substantially lower the phase space acceptance of various brightness measuring devices. This report considers several models for the effects of space charge upon the acceptance of both the field free, double aperture system and the magnetic ''emittance selector'' and compares them for some recent experiments on ATA and the High Brightness Test Stand. Reasonably conservative correction factors for the acceptances of these devices are derived.

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Attracting media attention is nothing new for Hart Lee Dykes ..."

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Scott Johnson"

Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Scott Johnson"

Photograph used for a story in the Daily Oklahoman newspaper.

Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Scott Johnson"

A numerical simulation has been constructed to obtain a detailed, quantitative estimate of the electromagnetic fields generated in a recently-proposed collective accelerator scheme for electrons. The code treats the secondary electrons by particle simulation and the beam dynamics by a time-dependent envelope model. The simulation gives a fully relativistic description of secondary electrons moving in selfconsistent electromagnetic fields. The calculations are made using coordinates t, x, y, z for the electrons and t, ct-z, r for the axisymmetric electromagnetic fields and currents. Code results showing the axial electric field dependence on the configuration of the ultrashort U.V. laser pulse will be given. 4 refs., 4 figs.

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Jim Mattox, regarding a legal question submitted for clarification: Authority of a joint city-county public health district to issue licenses, exact fees and impose fines for noncompliance with its rules.

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Jim Mattox, regarding a legal question submitted for clarification: Whether a state employee is entitled to paternity leave.

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Jim Mattox, regarding a legal question submitted for clarification: Whether the city of Bovina may charge home owners and business owners a flat fee for maintenance of a police department.

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Jim Mattox, regarding a legal question submitted for clarification: Whether a grievance hearing is open to the public under certain circumstances and related questions.

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Jim Mattox, regarding a legal question submitted for clarification; Legality of foreign lottery under Texas Law.

Weekly newspaper from Dublin, Texas that includes local, state, and national news along with advertising.

Photograph of a historic property located at 700 Greenville in McKinney, Texas.

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Assistant coach Brad Seely towers above Brad, Dennis, a 5-6 1 / 2 freshman Kiker, during OSU's Poto Day Wednesday."

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Clarence Price watches Joan Burroghs prepare some pecan pies."

Photograph used for a newspaper owned by the Oklahoma Publishing Company.