Welcome to LLE

The Laboratory for Laser Energetics (LLE) of the University of Rochester is a unique national resource for research and education in science and technology. LLE was established in 1970 as a center for the investigation of the interaction of intense radiation with matter. The National Nuclear Security Administration funds LLE as part of its Stockpile Stewardship Program.

Target being shot by a laser

Alumni Focus

Alumni Snapshot

Justin Bruce Peatross

Justin Peatross obtained his B.S. in Physics from the Brigham Young University and began graduate studies at the University of Rochester Department of Physics and Astronomy in 1988. His graduate research on The Far-Field Angular Distribution of High-Order Harmonics Produced in Light Scattering from a Thin Low-Density Gas Target was carried out at the Laboratory for Laser Energetics under the supervision of Profs. Meyerhofer and Eberly.

Users' Guide

The Omega
Laser Facility Users' Guide

is available for download here.

Special Release

10 Years of NIF Operations

The National Ignition Facility celebrates 10 years of operation this week. A video produced by the Lawrence Livermore Public Affairs Office for this event featuring the history of the National Ignition Facility and Science-Based Stockpile Stewardship can be found here.

Quick Shot

Reducing Layering Time
in Cryogenic Targets

Cryogenic and Tritium Facility Data Analyst, Dean Bredesen, is shown experimenting with temperature ramps used to develop cryogenic layers. Shown in the inset is Sean Adams, Moving Cryostat Transport Cart Technician, working in the Cart Maintenance Room optimizing the layering process within a 1-mm-OD cryogenic DT (deuterium/tritium) target. The target is being layered inside MCTC5, a 5000-lb moving cryogenic transfer cart, which can routinely control the layer temperature of targets to within 1/1000 Kelvin. Dean has been working with the Cryogenic and Tritium Facility's Chad Fella and Target Fabrication's Mark Wittman, to significantly reduce layering time for thin ice targets without compromising the final layer quality.

Past Quick Shots

Around the Lab

Tunable OMEGA P9 (TOP9)
Beam Project at LLE

In both indirect- and direct-drive inertial confinement fusion (ICF) experiments, energy can be lost or misdirected when the laser beams cross with each other on their way to the target. This phenomenon, known as cross-beam energy transfer (CBET), scatters light from one beam to another, mediated by a plasma grating, and leads to beams giving up part of their energy to other beams. Splitting the OMEGA beams into three different groups, each with a separate laser wavelength (color), has been proposed because simulations modeling wavelength detuning have shown to limit the energy transferred between beams. In fact, wavelength detuning is predicted to recover much of the drive power currently lost to CBET on OMEGA.