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Epitaxial Growth of La2O3 on Gallium Nitride and Measuring Band Offsets

May 23rd, 2013|Categories: Materials Science, News, News & Events, Research & Capabilities|Tags: , , , , , , , , , , , , , |

Reflection high energy electron diffraction (RHEED) images measured along the substrate <11‾20> direc­tion during the growth of a 40-nm-thick La2O3 film. Images represent the following stages of growth: (a) bare (0001)-oriented GaN, (b) 2 nm of La2O3, (c) 3 nm La2O3, (d) 5 nm La2O3, (e) 10 nm La2O3, & (f) 40 nm La2O3. Arrows indicate secondary diffrac­tion spots that are attributed to a cubic polymorph. Sandians Jon Ihlefeld (in the Electronic, Optical, & Nanostructured Materials Dept.), Mike Brumbach (in the Materials Characterization and [...]

Sandia Invents Versatile High-Temperature Seebeck and Electrical Conductivity Instrument

May 17th, 2013|Categories: Materials Science, News, News & Events, Office of Science, Research & Capabilities|Tags: , , , , , , |

Sandia post­doc Harlan Brown-Shaklee (in the Electronic, Optical, and Nanostructured Materials Dept.) and staff members Jon Ihlefeld (also in the Electronic, Optical, and Nanostructured Materials Dept.) and Peter Sharma (in the Materials Physics Dept.) have built a high-temperature Seebeck and electrical conductivity measurement instrument that can operate over broad atmosphere and temperature conditions. The Seebeck effect is the conversion of temperature differences directly into electricity, named after German physicist Thomas Johann Seebeck. Their instrument will [...]

Paper Describing Lessons Learned from Fukushima Receives “Outstanding Paper Award”

May 17th, 2013|Categories: Computational Modeling & Simulation, Energy, News, News & Events, Nuclear Energy, Systems Analysis|Tags: , , , , , , , , , , , , , |

Aerial view of the Fukushima plant area in 1975, showing separation between Units 5 & 6 and the majority of the complex. (National Land Image Information color aerial photographs, Ministry of Land, Infrastructure, Transport, and Tourism.) Jeff Cardoni (in the Severe Accident Analysis Dept.) presented the paper “MELCOR Simulations of the Severe Accident at the Fukushima 1F3 Reactor” at the 2012 ANS Winter Meeting and Nuclear Technology Expo, which held an embedded topical [...]

Water Increasingly Crucial in Energy Policies, Experts Say

May 16th, 2013|Categories: Energy, News, News & Events, Systems Analysis, Systems Engineering|Tags: , , , , , , , |

Power generating plants are often located near large sources of fresh water that they use as coolant for the power-generation cycle. Energy policymakers worldwide should look beyond supply security and environmental questions and consider water resource availability if they expect to succeed, experts said May 3 during a forum at the Woodrow Wilson International Center for Scholars. "Water has become the Achilles heel of some energy projects," said M. Michael Hightower, head of [...]

Sandia’s Work with Texas Southern University Cited by Representative Sheila Jackson Lee

May 16th, 2013|Categories: Analysis, Facilities, Infrastructure Security, Modeling, Modeling & Analysis, News, News & Events, NISAC, Partnership|Tags: , , , , , , , , , |

Sandia's NISAC facility. Sandia was mentioned in a letter by Representative Sheila Jackson Lee (D-TX) for outstanding work with Texas Southern University (TSU). Through the National Infrastructure Simulation and Analysis Center (NISAC) program, Sandia has partnered with TSU’s National Transportation Center of Excellence, to complete analyses of the petrochemical supply chain and related analyses of the impact of infrastructures. Representative Lee writes: “As a long-time resident of Houston, Texas, known by many as [...]

Sandia Solar Energy Test System Cited in National Engineering Competition

May 16th, 2013|Categories: Concentrating Solar Power, Energy, Energy Storage, Facilities, National Solar Thermal Test Facility, News, News & Events, Partnership, Renewable Energy, Solar|Tags: , , , , , , , , , , , |

The Molten Salt Test Loop at Sandia's National Solar Thermal Test Facility. Bridgers & Paxton Consulting Engineers, Inc., of Albuquerque, N.M., earned a National Recognition Award for exemplary engineering achievement in the American Council of Engineering Companies’ (ACEC) 47th annual Engineering Excellence Awards for the Molten Salt Test Loop (MSTL) project, part of Sandia's NSTTF. Designed and built to exacting specifications, Sandia’s MSTL system provides a means to perform accelerated lifetime testing on [...]

Louisiana Blue Ribbon Commission on Bayou Corne Safety

May 9th, 2013|Categories: Capabilities, Carbon Capture & Storage, Climate, Earth Sciences Research Center, Modeling & Analysis, News, News & Events, Research & Capabilities|Tags: , , , , , , , |

This August 3 aerial shot released by the Louisiana Department of Natural Resources shows the sinkhole near Bayou Corne, Louisiana, which has grown since it first began forming in August. Sandia researcher David Borns is part of a group of experts providing technical evaluations about possible causes and remedies for the sinkhole. (Photo courtesy of Louisiana Department of Natural Resources) Secretary Stephen Chustz, from the Louisiana Department of Natural Resources (LADNR), asked David [...]

Estimating Device or System Probability of Failure

May 9th, 2013|Categories: Analysis, Energy Surety, Facilities, Infrastructure Security, Modeling, Modeling & Analysis, News, News & Events, NISAC|Tags: , , , , , |

POF Darts is a new algorithm for the QMU problem of estimating device or system probability of failure (POF), e.g., of critical infrastructures in the face of a potentially disruptive event. POF Darts wraps around a computational simulation of a device, evaluating it at particular parameter values, such as uncertain environmental conditions and varying as-manufactured device characteristics. These evaluations are interpolated to build an estimate of the conditions under which the device fails, and their [...]

American Geophysical Union Publishes Hope Michelsen’s Induction to Alameda County Women’s Hall of Fame

May 2nd, 2013|Categories: CRF, Facilities, News, News & Events, Transportation Energy|Tags: , , , , , , , |

Sandia's Hope Michelsen. The April 9 issue of EOS, Transactions of the American Geophysical Union, ran a news item in their “Geophysisicists Honors” section about Hope Michelsen’s (in the Combustion Chemistry Dept.) induction into the Alameda County Women’s Hall of Fame ([94(15), p 144], announced here in February). The American Geophysical Union is the world’s largest professional society for geophysicists and atmospheric scientists, with more than 60,000 members.

Implemented “Vertically Lagrangian” Option in the Community Atmosphere Model

May 2nd, 2013|Categories: Analysis, Climate, Global Climate & Energy, Modeling, Modeling & Analysis, News, News & Events|Tags: , , , , , , , , , , , , , |

A screenshot from the 2-year AMIP (Atmospheric Model Intercomparison Project) precipitable water animation simulation run of the NSF/DOE Community Atmosphere Model (CAM5). The Community Earth System Model (CESM) is a state-of-the-art global climate model being developed with the support of the National Science Foundation and the Department of Energy and used for climate-change science and assessments. Sandia has been leading a multilaboratory effort to develop a new “dynamical core” for CESM’s atmospheric component. [...]

Sandia Quantum Transport Article Was the 12th Most Downloaded Paper from AIP’s Applied Physics Letters in February

May 1st, 2013|Categories: Capabilities, Materials Science, News, News & Events, Office of Science, Research & Capabilities|Tags: , , , , , , , , , , , , , , |

Research on topological insulators (TIs) has drawn intensive interests. The type-II InAs/GaSb heterostructure, due to its unusual alignment of the conduction and valence band edges of InAs and GaSb, is predicted to be a two-dimensional (2D) TI. σxx vs σxy at B = 20 T (blue dots), 25 T (black squares), and 30 T (red diamonds). Gray circles are defined by (σxx − N)2 + σxy2 = N2, with N = 1, 2, 3, and 4. Historically, type-II InAs/GaSb heterostructures have been extensively studied for infrared [...]

PV Paper Published in IEEE Transactions on Sustainable Energy

May 1st, 2013|Categories: DETL, Energy, Facilities, News, News & Events, Photovoltaic, Photovoltaic Systems Evaluation Laboratory (PSEL), Renewable Energy, Solar, Solar Newsletter, Systems Analysis|Tags: , , , , , , |

Matthew Lave is a Ph.D. student at the University of California, San Diego (UCSD). Matthew’s research focuses on variability analysis of solar radiation and solar power. His Ph.D. thesis is exploring upscaling and downscaling solar radiation time series using wavelets. Sandians Mathew Lave and Joshua Stein ( both in the Photovoltaics and Distributed Systems Dept.) along with Jan Kleissl (University of California–San Diego) published "A Wavelet-Based Variability Model (WVM) for Solar PV Power [...]

CRF Researchers Measure Reaction Rates of Second Key Atmospheric Component

May 1st, 2013|Categories: Analysis, Capabilities, Climate, CRF, Energy, Facilities, Global Climate & Energy, Modeling & Analysis, News, News & Events, Office of Science, Research & Capabilities, Sensing & Monitoring, Transportation Energy|Tags: , , , , , , , , , , , , |

Researchers at Sandia’s Combustion Research Facility, the University of Manchester, Bristol University, University of Southampton, and Hong Kong Polytechnic have successfully measured reaction rates of a second Criegee intermediate, CH3CHOO, and proven that the reactivity of the atmospheric chemical depends strongly on which way the molecule is twisted. The measurements will provide further insight into hydrocarbon combustion and atmospheric chemistry. A paper describing the research findings, “Direct Measurements of Conformer-Dependent Reactivity of the Criegee Intermediate [...]

Caterpillar, Sandia CRADA Opens Door to Multiple Research Projects

April 17th, 2013|Categories: Capabilities, Computational Modeling & Simulation, CRF, Materials Science, Modeling, Modeling, Modeling & Analysis, Modeling & Analysis, News, News & Events, Partnership, Research & Capabilities, Sensors & Optical Diagnostics, Systems Analysis, Systems Engineering, Transportation Energy|Tags: , , , , , , , , , , , , |

From left, Sandia computer scientists Brian Adams, Jim Stewart, and John Siirola look over the results of a Dakota optimization study. Caterpillar Inc.’s interest in Dakota, an open-source software tool developed by Sandia, launched talks that led to the CRADA signing. (Photo by Norman Johnson) Sandia and industrial giant Caterpillar Inc. have signed their first umbrella cooperative research and development agreement (CRADA), opening the door to a wide range of scientific research. “This [...]

Better Monitoring and Diagnostics Tackle Algae Biofuel Pond Crash Problem

April 17th, 2013|Categories: Biofuels, Biomass, Capabilities, Energy, News, News & Events, Renewable Energy, Research & Capabilities, Sensors & Optical Diagnostics, Systems Analysis, Transportation Energy|Tags: , , , , , , , , , , , , , |

Sandia National Laboratories’ Tom Reichardt, left, and Aaron Collins, center, chat with John McGowen of the Arizona Center for Algae Technology and Innovation (AzCATI). Sandia has developed several complementary technologies to help the algae industry in detecting and recovering from pond crashes, and is making use of the AzCATI test-bed facility to collect data and apply its technologies. (Photo by Steffan Schulz) Sandia is developing a suite of complementary technologies to help the [...]

New Book Highlights Pressing Need for Hydrogen-Powered Vehicles

April 17th, 2013|Categories: CRF, Energy, Energy Storage, Facilities, News, News & Events, Renewable Energy, Transportation Energy|Tags: , , , , , |

Sandia National Laboratories' Lennie Klebanoff says he feels a personal responsibility to inform technical readers and the public about the urgent need to get zero-emission hydrogen technology into the nation’s vehicles and other carbon-producing applications. (Photo by Dino Vournas) Sandia reveals the breadth of its hydrogen fuel expertise in the recently published Hydrogen Storage Technology—Materials and Applications. Sandia researcher Lennie Klebanoff (Hydrogen and Combustion Technologies Dept.) is confident that the book will give [...]

Sandia’s Dr. Jeffrey Tsao Is Recognized as an Asian-American Engineer of the Year

April 17th, 2013|Categories: Capabilities, Energy, Energy Efficiency, News, News & Events, Research & Capabilities, Solid-State Lighting, Systems Analysis, Systems Engineering|Tags: , , , , , , |

The 2013 Asian-American Engineer of the Year awardees. Sandia's Dr. Jeffrey Tsao is fourth from the right (standing). Dr. Tsao, a Distinguished Member of Sandia’s Technical Staff in the Semiconductor and Optical Sciences Department, is one of eight distinguished engineers upon whom this award was conferred this year by the AAEOY organization. He received this honor for, “sustained contributions to compound semiconductor materials and device science and exemplary contributions to solid-state lighting technology.” [...]

SSLS Exhibit at Explora Museum

April 14th, 2013|Categories: EC, Energy, Energy Efficiency, Events, News, News & Events, Solid-State Lighting|Tags: , , , , , , , , , , |

EFRC scientist Jeff Tsao, in conjunction with Sandian Erik Spoerke and UNM scientist Patrick Johnson, volunteered at Explora Museum over the weekend. The three scientists participated in a program event hosted by Explora called Portal to the Public, whose goal is to, "Engage in experiential activities with scientists that are your neighbors in the c0mmunity." Each scientist brought their own mobile exhibit showcasing different areas of science; Patrick's exhibit highlighted the difference between fluorescence and [...]

SPIDERS Completed Its Phase 1 Operational Demonstration in Late January

April 5th, 2013|Categories: Distribution Grid Integration, Energy Assurance, Energy Assurance, Energy Surety, Grid Integration, Infrastructure Security, Microgrid, News, News & Events, Partnership, Research & Capabilities, SMART Grid|Tags: , , , , , , , , |

The Smart Power Infrastructure Demonstration for Energy Reliability and Security (SPIDERS) Joint Capability Technology Demonstration (JCTD) completed its Phase 1 operational demonstration at Joint Base Pearl Harbor-Hickam in late January 2013. Part of the SPIDERS assessment team scrutinized controller operations, system status, and continuity of operations throughout the demonstration. Their report will focus on system effectiveness and training and contribute to the Transition Manager’s JCTD deliverables. SPIDERS IMT members discuss start up of OPS [...]

Sandia Cyber Engineering Research Laboratory (CERL) Formally Opens

April 5th, 2013|Categories: Analysis, Cyber, Cyber Engineering Research Laboratory (CERL), Facilities, Infrastructure Assurance, Infrastructure Security, News, News & Events|Tags: , , , , , , , |

Posed on open-house day are, from left, Acting VP of Science and Technology Duane Dimos, UNM research VP John McGraw, Executive VP Kim Sawyer, NNSA official Dimitri Kusnezov, Cray President Peter Ungaro, Sandia Computing Research Director Rob Leland, U.S. Senator Tom Udall, Sandia President Paul Hommert, Bernallilo county commissioner Maggie Hart Stebbins, and U.S. Representative Ben Ray Lujan. Activities at CERL, located in the Sandia Science & Technology Park, are expected to marry [...]