August 1995 S&TR


  • Front Matter
    The Laboratory in the News
    Commentary on Science and Technology
  • Feature Articles
    Scanning Tunneling Microscopy: Opening a New Era of Materials Engineering
    Risk Assessments: From Reactor Safety to Health Care
  • Research Highlights
    Crucial Steps Taken in Laser Guide Star System
    Forensic Science Center Update
  • Patents and Awards
  • Abstracts (see below)

  • Below are files in Portable Document Format. Click on highlighted text to download.
    How to view PDF files //S&TR Home Page // LLNL Home Page

    August 1995 in PDF format (2063K)


    Feature Articles

  • Scanning Tunneling Microscopy: Opening a New Era of Materials Engineering

    (pdf file, 633K)

    Incorporating an STM into an ultra-high-vacuum environment that contains a suitable combination of facilities for sample preparation, material deposition, and complementary diffraction-based surface diagnostics has enabled us to analyze the atomic details of the growth of a variety of thin films for diverse applications. We are currently applying this combination of techniques to evaluate how processing parameters, such as substrate temperature and film deposition rate, affect the atomic structures of interfaces in the fabrication of multilayers for x-ray optics, microelectronics, and magnetic recording devices. The results of these studies allow us to identify the surface defects that have a critical influence on film growth, to investigate their origins, and ultimately to control their occurrence. By doing so, we can improve new materials and devices and give them better performance characteristics.

  • Risk Assessments: From Reactor Safety to Health Care

    (pdf file, 908K)

    The Laboratory's Fission Energy and Systems Safety Program (FESSP) performs engineering risk assessments to study and assess the safety, reliability, and effectiveness of various products, processes, and facilities. Evolving methods and techniques are discussed in the context of four cases: an analysis to develop seismic criteria for siting and design of nuclear power plants, risk analysis of reactor coolant piping systems to establish new piping design objectives and increase nuclear power plant safety, study of risks involved in the transport of spent reactor fuel to determine the level of safety provided during transport and the adequacy of existing transport regulations for such material, and development of an approach to identify human-initiated risks in the use of nuclear medical devices such as the Gamma Knife.


    Research Highlights

  • Crucial Steps Taken in Laser Guide Star System
  • Forensic Science Center Update

    (pdf file, 413K)


    How to view PDF files //S&TR Home Page // LLNL Home Page


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