Laboratory for Laser Energetics
|This article includes a list of references, but its sources remain unclear because it has insufficient inline citations. (August 2013)|
|Motto||"A unique national resource"|
Field of research
|The investigation of the interaction of intense radiation with matter|
|Director||Robert L. McCrory|
|Staff||400 - 500 people|
250 East River Rd|
Rochester, NY 14623-1212
|Location||Brighton, New York, US|
United States Department of Energy|
MIT Plasma Science and Fusion Center
State University of New York at Geneseo
University of Nevada, Reno
University of Wisconsin–Madison
|University of Rochester|
The Laboratory for Laser Energetics (LLE) is a scientific research facility which is part of the University of Rochester's south campus, located in Brighton, New York. The lab was established in 1970 and its operations since then have been funded jointly; mainly by the United States Department of Energy, the University of Rochester and the New York State government. The Laser Lab was commissioned to serve as a center for investigations of high-energy physics, specifically those involving the interaction of extremely intense laser radiation with matter. Many types of scientific experiments are performed at the facility with a strong emphasis on inertial confinement, direct drive, laser-induced fusion using OMEGA, currently the world's highest-energy ultraviolet laser. The lab shares its building with the Center for Optoelectronics and Imaging and the Center for Optics Manufacturing. A new addition, the Robert L. Sproull Center for Ultra High Intensity Laser Research, was opened in 2005 and houses the OMEGA EP laser, which was completed in May 2008. During summer months the lab sponsors a program for high school students which involves local-area high school juniors in the research being done at the laboratory. Most of the projects are done on current research that is led by senior scientists at the lab.
The LLE was founded on the University of Rochesters' campus in 1970, by Dr. Moshe Lubin. Working with outside companies such as Kodak the team built Delta, a four beam laser system in 1972. Construction started on the current LLE site in 1976. The facility opened in 1978 a six beam laser systems and a 24 beam system follows two years later. In 1985, Donna Strickland and Gérard Mourou invent a method to amplify lasers pulses by "chirping". This method change a single wavelength of laser light into a spectrum of wavelengths. The system amplifies the laser at each wavelength and then reconstitutes the beam into one color. Chirp pulsed amplification became instrumental in building the National Ignition Facility and the Omega EP system. In 1995, the omega laser was increased to 60 beams system and in 2008 the Omega extended performance system was opened.
LLE OMEGA laser facility
The OMEGA laser at the LLE is one of the most powerful and highest energy lasers in the world. It is a 60-beam ultraviolet frequency-tripled neodymium glass laser, which is capable of delivering 30 kilojoules at up to 60 terawatts onto a target less than 2 millimeter in diameter. Construction and commissioning of the laser were completed in 1995. OMEGA held the record for highest energy laser (per pulse) from 1999 (after the Nova laser's dismantling) to 2005, when the first 8 beams of the National Ignition Facility exceeded OMEGA's output by about 30 kJ in the ultraviolet. The maximum fusion yield of OMEGA so far is about 1014 neutrons per shot (first achieved in 1995),and it once held the record for highest neutron yield of any inertial confinement fusion device.
LLE OMEGA EP laser system
The four beam OMEGA EP (extended performance) laser system was dedicated on May 16, 2008. Along with the four NIF-like laser beams, it consists of a new target chamber and a vacuum pulse compression chamber containing large-aperture pulse compression gratings, allowing the laser system to perform short pulse laser shots. The laser is housed inside the newest addition to the building, which was completed in 2005. The combination of the OMEGA and the OMEGA EP laser systems will allow the LLE to be the world's only facility capable of fully integrated cryogenic fast ignition experiments.
- 1998: LLE-developed laser source on SLAC provided the first laboratory evidence for positron production from inelastic light-by-light scattering involving only real photons.
- 1999–present: LLE scientists et al developed the multidimensional hydrodynamics code DRACO. DRACO is used to simulate inertial confinement fusion experiments in one-, two-, or three-dimensions.
- 2011: Omega becomes the first laser system to measure a nuclear scattering cross section more precisely than ever determined before with particle accelerator.
- 1989: LLE scientists pioneered the laser beam smoothing technique "Smoothing by Spectral Dispersion" (SSD). This beam-smoothing technique is used to produce uniform beam profiles for high-power, frequency-tripled glass lasers. SSD has been adopted on all major glass laser fusion facilities, including LMJ and the NIF.
LLNL's principal sponsor is the Department of Energy/National Nuclear Security Administration (DOE/NNSA) Office of Defense Programs, which supports its stockpile stewardship and advanced scientific computing programs.
The Laboratory has a five-fold mission:
- To conduct implosion experiments and basic physics experiments in support of the National Inertial Confinement Fusion (ICF) program.
- To develop new laser and materials technologies.
- To provide graduate and undergraduate education in electro-optics, high-power lasers, high-energy-density physics, plasma physics, and nuclear fusion technology.
- To operate the National Laser Users' Facility.
- To conduct research and development in advanced technology related to high-energy-density phenomena.
- National Ignition Facility
- Inertial confinement fusion
- University of Rochester
- Riccardo Betti
- Gérard Mourou
- Big Science
- "Leading Lights" Features, Rochester Magazine, 2010, http://www.rochester.edu/pr/Review/V73N1/0401_feature2.html, By Scott Hauser
- "History of the Laboratory for Laser Energetics" http://www.lle.rochester.edu/timeline/#1970-0
- "Dr. Donna Strickland: Packing a laser punch" The University of Waterloo , Personal Profiles, accessed 1-11-2014, https://uwaterloo.ca/science/magnet-talent-more-stories/dr-donna-strickland
- D. L. Burke, R. C. Field, G. Horton-Smith, J. E. Spencer, D. Walz, S. C. Berridge, W. M. Bugg, K. Shmakov, A. W. Weidemann, C. Bula, K. T. McDonald, E. J. Prebys, C. Bamber, S. J. Boege, T. Koffas, T. Kotseroglou, A. C. Melissinos, D. D. Meyerhofer, D. A. Reis, and W. RaggPositron Production in Multiphoton Light-by-Light ScatteringPhys. Rev. Lett.79 (9), 1626-1629 (1998) http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.79.1626
- D. Keller, T. J. B. Collins, J. A. Delettrez, P. W. McKenty, P. B. Radha, B. Whitney, and G. A. MosesDRACO A New Multidimensional HydrocodeBull. Am. Phys. Soc.447371999 http://adsabs.harvard.edu/abs/1999APS..DPP.BP139K
- J. A. Frenje et al.,Measurements of the Differential Cross Sections for the Elastic n-3H and n-2H Scattering at 14.1 MeV by Using an Inertial Confinement Fusion FacilityPhys. Rev. Lett. 107, 122502 (2011) http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.107.122502
- "Improved laser-beam uniformity using the angular dispersion of frequency-modulated light", S. Skupsky, R. W. Short, T. Kessler, R. S. Craxton, S. Letzring, and J. M. Soures, J. Appl. Phys. 66, 3456 (1989) http://scitation.aip.org/content/aip/journal/jap/66/8/10.1063/1.344101
- "History of the Laboratory for Laser Energetics" http://www.lle.rochester.edu/timeline/#1989-0