2004 Calendar

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    OMEGA EP Building Site

    Overview photograph of OMEGA EP building at the start of construction. During construction (right); groundbreaking ceremony (middle right); drawing of building (middle); and aerial shot of site (bottom). A drawing of the overall site plan forms the background.

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    History

    The Special Atomic Energy Commission Laser-Fusion Advisory Panel issued its final report. The panel found that laser fusion was a promising approach to power generation that also offered a wide range of other applications and deserved broader support, including participation by industry, universities, and utilities.

    31 January 1975

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    OMEGA EP Disk Amplifier

    Front view of an OMEGA EP disk amplifier during a pre-ionization and lamp check (PILC)

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    History

    "Linear Stabilitie Analysis of Laser-Driven Spherical Implosions," published in Physical Review Letters by J. N. Shiau, E. B. Goldman, and C. I. Weng of LLE, is one of the first studies on hydrodynamic instabiliteis in laser-driven fusion.

    18 February 1974

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    Multi-Spectral Imaging Diagnostic

    Array of implosion-core x-ray images produced during an experiment carried out by an NLUF team led by the University of of Nevada, Reno. The experiment uses a multi-spectral imaging diagnostic based on an LLE-developed technique to produce a monochromatic x-ray image of the capsule implosion (bottom image).

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    History

    "Improved Laser-Beam Uniformity Using the Angular Dispersion of Frequency-Modulated Light," by S. Skupsky et al., of LLE, is submitted to the Journal of Applied Physics. It details the basis of the SSD beam-smoothing technique now used on all Nd:glass fusion lasers.

    24 March 1989

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    Laser–Plasma Interaction

    Page from an OMEGA laser–plasma interaction (LPI) experiment. The red light is the half-harmonic of the incident UV light and is produced by the two-plasmon-decay (TPD) instability.

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    History

    A ceremony is held to lay the cornerstone for the LLE building. Guests included representatives of the university, government, and industry.

    2 April 1976

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    Hydrodynamic Simulations

    Multidimensional (3-D) simulations using the DRACO code of the propagation of a shock through a DT-wetted foam. NIF direct-drive designs using such foams could ignite and produce high gain.

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    History

    The Laser Fusion Feasibility Project (LFFP) is established at LLE. It is the first privately funded effort involving industry-university-government collaboration to investigate laser fusion as an energy source for the future

    17 May 1972

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    Tiled Gratings

    Two-grating assembly used to demonstrate the ability to use tiled gratings to generate ultra-high-power laser pulses on OMEGA EP.

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    History

    An article published in Laser Focus by Mourou, Strickland, and Williamson of LLE describes how chirped-pulse compression can be applied to high-energy laser amplifiers (CPA). This technique, developed and demonstrated at LLE in 1985, is the basis of modern petawatt lasers.

    June 1986

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    Fast Ignition

    Time-integrated photograph of an imploding direct-drive cone target used to test elements of the "Fast-ignition" approach to ICF.

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    History

    The first experiments using a NIF-like multiple beam phasing configuration on hohlraum targets were conducted on OMEGA in 1997 and reported in an article by scientists from LANL, LLNL, and LLE published on this date in Physical Review Letters.

    6 July 1998

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    LLE Electronics

    Image of the control board of a new generic streak camera developed and produced by LLE

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    History

    At a laser–matter interaction workshop held at RPI, LLE scientists present the first results on the use of multiple short laser pulses to enhance absorption of laser light by laser-fusion targets. Multiple-laser-pulse irradiation (pickets) is a feature of current high-gain, direct-drive target designs.

    30 August 1971

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    Deformable Mirrors

    Close-up image of the actuators used to control the curvature of the NIF deformable mirrors that are being fabricated and tested at LLE

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    History

    "Positron Production in Multiphoton Light-by-Light Scattering" is published in Physical Review Letters. The work is the result of a multi-institutional collaboration that made use of an LLE-developed laser source on SLAC to provide the first laboratory evidence for inelastic light-by-light scattering involving only real photons.

    1 September 1997

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    NLUF Experiments

    Starburst created by visible light produced during on OMEGA experiment carried out by the NLUF team led by Polymath Research Inc. The goal of the experiment is to use optical-mixing techniques to control the stimulated Raman backscattering instability by crossing a blue beam with a grean beam.

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    History

    The University of Rochester establishes the Laboratory for Laser Energetics with a mission to investigate the interaction of intense radiation with matter. LLE's founding director was Moshe Lubin.

    October 1970

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    Asymmetrically Irradiated Direct-Drive Targets

    Color map of the energy distribution produced on a spherical target during an OMEGA experiment to study assymmetrically irradiated direct-drive targets

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    History

    Initial laser–matter interaction experiments begin at the University of Rochester in a laboratory withing the Department of Mechanical and Aerospace Sciences.

    November 1967

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    Polymer Liquid Crystal Flakes

    The optical properties of these flakes (magnified 500x) can be controlled with an electric field leading to potential applications in electro-optic devices and displays (such as electronic paper).

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    History

    The first direct measurement of compressed fuel density in a laser-imploded target using x-ray spectroscopy is reported in a Physical Review Letters article by LLE scientist B. Yaakobi et al.

    12 December 1977

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