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Search Publications by: Thomas B. Lucatorto (Assoc)

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Displaying 51 - 75 of 114

Extreme Ultraviolet Metrology at SURF III

January 1, 2001
Author(s)
Charles S. Tarrio, Robert E. Vest, S Grantham, Thomas B. Lucatorto
The last two decades have seen the development normal-incidence multiplayer mirrors and semiconductor photodiodes for extreme ultraviolet (EUV) radiation. Applications such as in astrophysics, lithography, and plasma physics, require precise calibrations

Doppler-Free Two-Photon Spectroscopy in the VUV: The Helium 1 1 S - 2 1 S Transition

September 1, 2000
Author(s)
S D. Bergeson, K G. Baldwin, Thomas B. Lucatorto, T J. McIlrath, C H. Cheng, E E. Eyler
We describe techniques for laser spectroscopy in the vacuum ultraviolet (VUV) spectral region that combine high spectral resolution with high absolute accuracy. A nearly transform-limited nanosecond laser source at 120 nm is constructed using difference

Selected Programs at the New SURF III Electron Storage Ring

June 1, 2000
Author(s)
Mitchell L. Furst, Uwe Arp, G P. Cauchon, A D. Hamilton, L R. Hughey, Thomas B. Lucatorto, Charles S. Tarrio
The conversion of the electron storage ring at NIST (the National Institute of Standards and Technology) to SURF III (the Synchrotron Ultraviolet Radiation Facility) has resulted in a significant improvement to the azimuthal uniformity of magnetic field as

Tomography of Integrated Circuit Interconnect With an Electromigration Void

May 1, 2000
Author(s)
Zachary H. Levine, A R. Kalukin, M Kuhn, S P. Frigo, I McNulty, C C. Retsch, Y Wang, Uwe Arp, Thomas B. Lucatorto, Bruce D. Ravel, Charles S. Tarrio
An integrated circuit interconnect was subject to accelerated-life conditions to induce an electromigration void. The silicon substrate was removed, leaving only the interconnect encased test structure encased in silica. We imaged the sample with 1750 eV

Characterization of Materials Using an Ultraviolet Radiometric Beamline at SURF III

January 1, 2000
Author(s)
Ping-Shine Shaw, R Gupta, Thomas A. Germer, Uwe Arp, Thomas B. Lucatorto, Keith R. Lykke
The completion of the upgrade of the synchrotron facilities at the National Institute of Standards and Technology (NIST) has yielded a better-characterization broadband source of ultraviolet (UV) radiation at the Synchrotron Ultraviolet Radiation Facility

Precision Spectroscopy in He as a Test of QED

December 1, 1999
Author(s)
S Bergeson, A Balakrishnan, K G. Baldwin, Thomas B. Lucatorto, J P. Marangos, T J. McIlrath, Thomas R. O'Brian, S L. Rolston, Craig J. Sansonetti, J Wen, N Westbrook, C H. Cheng, E E. Eyler
High resolution laser-based measurements of energy levels have spurred the development and refinement of quantum electrodynamic calculations. We have extended very high resolution laser spectroscopy techniques into the vacuum ultraviolet wavelength region

NIST Programs for Calibrations in the Far Ultraviolet Spectral Region

November 1, 1999
Author(s)
Robert E. Vest, L R. Canfield, Mitchell L. Furst, R M. Graves, A D. Hamilton, L R. Hughey, Thomas B. Lucatorto, R P. Madden
The National Institute of Standards and Technology (NIST) serves the growing ultraviolet user community by providing calibration services throughout the spectral range from 2 nm to 400 nm. In this paper we describe the far ultraviolet transfer standard

Instrumental Aspects of X-Ray Microbeams in the Range Above 1 keV

April 1, 1999
Author(s)
P Dhez, P Chevallier, Thomas B. Lucatorto, Charles Tarrio
X rays were discovered by Roentgen in 1895, just over 100 years ago. Early investigations by Roentgen himself indicated that prisms, lenses, and mirrors were seemingly ineffective for deflecting and focusing x rays. However, the magical ability to look

Precision Spectroscopy in He as a Test of QED

January 1, 1999
Author(s)
S D. Bergeson, A Balakrishnan, G H. Baldwin, Thomas B. Lucatorto, J P. Marangos, T J. McIlrath, Thomas R. O'Brian, S L. Rolston, Craig J. Sansonetti, J Wen, N Westbrook, C H. Cheng, E E. Eyler

Ultraviolet Radiometry With Synchrotron Radiation and Cryogenic Radiometer

January 1, 1999
Author(s)
Ping-Shine Shaw, Keith R. Lykke, Thomas R. O'Brian, Arp Uwe, H H. White, Thomas B. Lucatorto, J L. Dehmer, Albert C. Parr, R Gupta
The combination of a cryogenic radiometer and synchrotron radiation enablesdetector scale realization in spectral regions that are otherwise difficult to access. Cryogenic radiometry is the most accurate primary detector-based standard available to date

Measurement of the He Ground State Lamb Shift Via the Two-Photon 1 1 S - 2 1 S transition

April 1, 1998
Author(s)
S Bergeson, A Balakrishnan, K G. Baldwin, Thomas B. Lucatorto, J P. Marangos, T J. McIlrath, Thomas R. O'Brian, S L. Rolston, J Wen, N Westbrook, C H. Cheng, E E. Eyler, Craig J. Sansonetti
We have extended two-photon Doppler-free spectroscopy to the vacuum ultraviolet spectral region to accurately measure the He 1 1S - 2 1S transition at 120 nm. Our result is 4 984 872 315[48] MHz. This yields a ground state Lamb shift of 41104[48] MHz, in