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High-power pulsed lasers

Description: The ideas that led to the successful construction and operation of large multibeam fusion lasers at the Lawrence Livermore Laboratory are reviewed. These lasers are based on the use of Nd:glass laser materials. However, most of the concepts are applicable to any laser being designed for fusion experimentation. This report is a summary of lectures given by the author at the 20th Scottish University Summer School in Physics, on Laser Plasma Interaction. This report includes basic concepts of the … more
Date: April 2, 1980
Creator: Holzrichter, J.F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

High precision Woelter optic calibration facility

Description: We have developed an off-line facility for very precise characterization of the reflectance and spatial resolution of the grazing incidence Woelter Type 1 x-ray optics used at Nova. The primary component of the facility is a high brightness, ``point`` x-ray source consisting of a focussed DC electron beam incident onto a precision manipulated target/pinhole array. The data are recorded with a selection of detectors. For imaging measurements we use direct exposure x-ray film modules or an x-ray … more
Date: May 2, 1994
Creator: Morales, R. I.; Remington, B. A. & Schwinn, T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Sodium laser guide star system at Lawrence Livermore National Laboratory: System description and experimental results

Description: The architecture and major system components of the sodium-layer kw guide star system at LLNL will be described, and experimental results reported. The subsystems include the laser system, the beam delivery system including a pulse stretcher and beam pointing control, the beam director, and the telescope with its adaptive-optics package. The laser system is one developed for the Atomic Vapor Laser Isotope Separation (AVLIS) Program. This laser system can be configured in various ways in support… more
Date: March 2, 1994
Creator: Avicola, K.; Brase, J. & Morris, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Critical illumination condenser for extreme ultraviolet projection lithography

Description: A condenser system couples a radiation source to an imaging system. The authors have designed a critical illumination condenser system which meets the technical challenges of extreme ultraviolet projection lithography based on a ring field imaging system and a laser produced plasma source. The optical system, a three spherical mirror optical design, is capable of illuminating the extent of the mask plane by scanning either the primary mirror or the laser plasma source. This type of condenser op… more
Date: March 2, 1995
Creator: Cohen, S. J. & Seppala, L. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Conceptual design of the National Ignition Facility

Description: DOE commissioned a Conceptual Design Report (CDR) for the National Ignition Facility (NIF) in January 1993 as part of a Key Decision Zero (KDO), justification of Mission Need. Motivated by the progress to date by the Inertial Confinement Fusion (ICF) program in meeting the Nova Technical Contract goals established by the National Academy of Sciences in 1989, the Secretary requested a design using a solid-state laser driver operating at the third harmonic (0.35 {mu}m) of neodymium (Nd) glass. Th… more
Date: August 2, 1995
Creator: Paisner, J.A.; Kumpan, S.A.; Lowdermilk, W.H.; Boyes, J.D. & Sorem, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Effect of focusing optics on x-ray speckle contrast

Description: The authors investigated the behavior of speckle contrast and size under various experimental conditions using 1.82 keV x-rays. In this paper, they report the comparison of two different setups for x-ray speckle experiments: one employing a focusing zone plate and one in which a pinhole selects the size of the coherent x-ray beam. They found a strong dependence of the speckle contrast and size on the type of setup. In general, the pinhole setup results in higher contrast but smaller speckle siz… more
Date: November 2, 1999
Creator: Retsch, C. C.; Wang, Y.; Frigo, S. P.; McNulty, I.; Lurio, L. B. & Stephenson, G. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Ray-tracing studies for a whole-viewing-angle retroreflector

Description: The APS Survey and Alignment team uses LEICA laser trackers for the majority of their alignment tasks. These instruments utilize several different retroreflectors for tracking the path of the laser interferometer. Currently in use are open-air corner cubes with an acceptance angle of {+-}20{degree}, corner cube prisms with an acceptance angle of {+-}50{degree}, and a Cat's eye with an acceptance angle of {+-}60{degree}. Best measurement results can be achieved by using an open-air corner cube t… more
Date: February 2, 2000
Creator: Yang, B. & Friedsam, H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Optical sensors for process control and emissions monitoring in industry

Description: Sandia National Laboratories has a number of ongoing projects developing optical sensors for industrial environments. Laser-based sensors can be attractive for relatively harsh environments where extractive sampling is difficult, inaccurate, or impractical. Tools developed primarily for laboratory research can often be adapted for the real world and applied to problems far from their original uses. Spectroscopic techniques, appropriately selected, have the potential to impact the bottom of line… more
Date: November 2, 1998
Creator: Allendorf, S. W.; Ottesen, D. K.; Hahn, D. W.; Kulp, T. J. & Goers, U. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Precision micro drilling with copper vapor lasers

Description: The authors have developed a copper vapor laser based micro machining system using advanced beam quality control and precision wavefront tilting technologies. Micro drilling has been demonstrated through percussion drilling and trepanning using this system. With a 30 W copper vapor laser running at multi-kHz pulse repetition frequency, straight parallel holes with size varying from 500 microns to less than 25 microns and with aspect ratio up to 1:40 have been consistently drilled on a variety o… more
Date: September 2, 1994
Creator: Chang, J. J.; Martinez, M. W.; Warner, B. E.; Dragon, E. P.; Huete, G. & Solarski, M. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A hard x-ray scanning microprobe for fluorescence imaging and microdiffraction at the Advanced Photon Source

Description: A hard x-ray scanning microprobe based on zone plate optics and undulator radiation, in the energy region from 6 to 20 keV, has reached a focal spot size (FWHM) of 0.15 {micro}m (v) x 0.6 {micro}m (h), and a photon flux of 4 x 10{sup 9} photons/sec/0.01%BW. Using a slit 44 meters upstream to create a virtual source, a circular beam spot of 0.15 {micro}m in diameter can be obtained with a photon flux of one order of magnitude less. During fluorescence mapping of trace elements in a single human … more
Date: November 2, 1999
Creator: Cai, L.; Lai, B.; Yun, W.; Ilinski, P.; Legnini, D.; Maser, J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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