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
Office of the Director

Laser's 50th Anniversary

SPIE interview with LLE Director
Dr. Robert L. McCrory

Users' Guide

The Omega
Laser Facility Users' Guide

is now available for download here.

Quick Shot

OMEGA Ultraviolet Alignment Table

Located near the shield wall underneath the OMEGA viewing gallery in the Target Bay, the ultraviolet alignment table (UVAT) is used daily for several beam alignment and measurement missions. These tasks include targeting operations, ultraviolet centering checks, focus lens assembly retro checks, beam-interference checks, harmonic-energy-diagnostic alignment checks, F-alignment sensor package alignment, ultraviolet diagnostic table alignment, optical transport instrumentation system measurements, and 2ω and 4ω targeting. The UVAT uses two alignment laser sources to accomplish beam alignment and measurement missions: a 1.5-W UV laser operating at 351 nm and a 500-mW green laser operating at 527 nm. The UV laser is capable of producing two full-aperture (~270-mm-diam) beams; one beam exits the table traveling south and the other north. The green laser is capable of producing one full-aperture beam traveling north only. Shown at the UVAT's laser-protective barriers is Senior Manufacturing Engineer, Ray Huff.

Past Quick Shots

Around the Lab

Commissioning an X-Ray Detector System for Spectral Analysis of Tritium-Filled Targets

LLE uses glass and plastic targets filled with deuterium–tritium mixtures (DT) for research into inertial confinement fusion experiments. The 60-beam OMEGA Laser System is employed to implode these targets. Because targets require pressurizing to tens of atmospheres without crushing the fragile, thin-wall shells, the permeation-filling process can take several days. Typically, it takes five or six permeation time constants to fill targets to the desired pressure. An x-ray detection system (XDS), originally developed to measure bremsstrahlung of tritium β decay from the surface of metals, has been modified to nondestructively measure the pressure of DT fuel inside a target just prior to a shot.