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
Users' Guide

LLE Zoom Backgrounds

for virtual meetings are available here.

Quick Shot

Alt Text of the Image

Cryo Imager

Quantifying submicron contaminants on cryogenic fusion targets can be challenging. An ongoing project is underway with its main objective being to quantify submicron contaminants that are theorized to be picked up on the outside of the shell during the filling and transfer process. Such submicron particulates could act to degrade implosion performance by seeding surface perturbations that would grow as a result of hydrodynamic instabilities. A light microscope is implemented into the cold confines of a Fill and Transfer Station to view a cryogenic DT target at a distance of 3 mm. This process employs two novel concepts including a complementary metal oxide semiconductor (CMOS) camera in a warm vacuum space and an off-the-shelf microscope objective which is modified for vacuum conditions cooled to 40 K (‑387.7°F). This new microscope can resolve features down to ~0.5 µm, which is far superior to the 3-µm resolution of the current characterization stations. Shown at the imager’s objective is Jun Zou, mechanical engineer on the project. Additional primary team members include Dave Weiner, Sal Scarantino, Jason Bender, Mark Wittman, Mike Koch, and Dean Bredesen. Roger Janezic is the principal investigator.

Past Quick Shots

LLE Diversity Statement

To LLE staff, students, faculty, and colleagues:

In a recent message to the University community, President Sarah Mangelsdorf and Chief Diversity Officer Mercedes Ramírez Fernández shared some steps that are being taken to address issues of systemic racism on and around the campus.

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COVID-19 Resources

The content in this section was developed for persons working at LLE, and will be updated as new information becomes available

University of Rochester COVID-19 Updates
LLE COVID-19 Updates
Video of All Hands Meeting 5/6

LLE COVID-19 Safety Resources

Dr. Chat Bot Daily Health Status Survey
Dr. Chat Bot Login Instructions
COVID Supplies Request Forms
LLE COVID-19 Workplace Safety Policy
LLE Building Access
LLE COVID-19 Safety Training
Safety Suggestions and Questions
LLE COVID-19 Q&A

COVID Statistics

Centers for Disease Control
NYS Dept. of Health COVID-19 Tracker
Monroe County NY COVID-19 Dashboard
UR confirmed cases

Additional Resources

Center for Disease Control: COVID-19


Around the Lab

The Design and Implementation of the SR-Te Diagnostic

The goal for fusion experiments is to demonstrate that the outputs of thermonuclear reactions initiated from an assembled hydrogenic plasma are, by themselves, capable of triggering additional reactions. Current experiments at the Omega Laser Facility show that while the capsule hot spot just reaches conditions to begin this process, it would not continue as much as considered possible.

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