Patents

John W. Elmer and Dennis W. O'Brien
Electron Beam Machining Using Rotating and Shaped Beam Power Distribution
U.S. Patent 5,534,677
July 9, 1996
An apparatus and method for electron beam (EB) machining (drilling, cutting, and welding) that uses conventional EB guns, power supplies, and welding machine technology without the need for fast bias pulsing technology. A magnetic lensing (EB optics) system and electronic controls are used to concurrently bend, focus, shape, scan, and rotate the beam to protect the EB gun, to create a desired effective power-density distribution, and to rotate or scan this shaped beam in a controlled way.

Mark Bowers and Allen Hankla
Phase and Birefringence Aberration Correction
U.S. Patent 5,535,049
July 9, 1996
A four-wave mixing phase conjugate mirror that corrects phase aberrations of a coherent electromagnetic beam and birefringence induced upon that beam. The stimulated Brillouin scattering phase conjugation technique is augmented to include Brillouin-enhanced four-wave mixing. A seed beam is generated by a main oscillator that arrives at the phase conjugate cell before the signal beams in order to initiate the Brillouin effect. The signal beam being amplified through the amplifier chain is split into two perpendicularly polarized beams.


Craig J. Rivers, Roanne A. Lee, and Glenn E. Jones
Electrically Shielded Enclosure with Magnetically Retained Removable Cover
U.S. Patent 5,534,663
July 9, 1996
An enclosure having electrical components and an easily removable shielded cover with magnetic securement means to secure the cover to the enclosure in a manner that provides an electrical seal between the cover and the enclosure to prevent the passage of electromagnetic radiation through the joint between the cover and the enclosure. The magnetic securement means are provided on the surface of the enclosure surrounding the opening and facing the cover, and ferromagnetic means are provided on the surface of the cover facing the magnetic securement means.


Troy W. Barbee, Jr. and Timothy Weihs
Ignitable Heterogeneous Stratified Structure for the Propagation of an Internal Exothermic Chemical Reaction along an Expanding Wavefront and Method of Making Same
U.S. Patent 5,538,795
July 23, 1996
A multilayer structure with a selectable propagating reaction front velocity (V), a reaction initiation temperature attained by application of external energy, and an amount of energy delivered by a reaction of alternating unreacted layers of the multilayer structure. Because V is selectable and controllable, a variety of different applications for the multilayer structures are possible, including their use as ignitors, in joining applications, in fabrication of new materials, as smart materials, and in medical applications and devices.


Chi Y. Fu
Process for Forming Synapses in Neural Networks and Resistor Therefor
U.S. Patent 5,538,915
July 23, 1996
A customizable neural network where one or more resistors form each synapse. All the resistors in the synaptic array are identical, thus simplifying the processing issues. Doped, amorphous silicon is used as the resistor material to create extremely high resistances occupying very small spaces. Connected in series with each resistor in the array is at least one severable conductor whose uppermost layer has a lower reflectivity of laser energy than typical metal conductors at a desired laser wavelength.



Awards

James "Buddy" Swingle recently received the Intelligence Community Seal Medallion from Central Intelligence Agency Director John Deutch during a ceremony at CIA headquarters in Langley, Virginia. Swingle, who is executive secretary and acting chairman of the Joint Atomic Energy Intelligence Committee, was cited for his "sustained superior performance" in producing foreign nuclear intelligence reports that "provided significant assistance to the intelligence and policy communities." Swingle has been at Livermore since 1972, working on a variety of high-energy laser and nuclear weapons programs. He joined the Nonproliferation, Arms Control, and International Security Directorate in 1990 and was recently named leader of Z Division.

Lawrence Livermore's Storm Water Management Program has received the U.S. Environmental Protection Agency's 1996 National Storm Water Control Program Excellence Award in the industrial category. The award recognizes the Laboratory's efforts to curb water pollution through improved storm water control. Representatives from the Storm Water Management Program, a part of the Environmental Protection Department in the Laboratory's Plant Operations Directorate traveled to Dallas, Texas, in early October to receive the award at the Annual Water Environment Federation Conference.

Three teams of Laboratory employees are recipients of Hammer Awards for the Department of Energy. They are: the Life Cycle Asset Management (LCAM) team from the Plant Engineering Department, a part of the Plant Operations Directorate; the Directives Reengineering Group, out of the Office of Scientific and Technical Information in the Director's Office; and the Performance Management Team, working out of the Office of Policy, also in the Director's Office. The Hammer Awards were created by Vice President Al Gore to recognize special achievements in the efforts to reinvent government by improving customer service, cutting red tape, empowering employees, or getting back to basics.