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Results 251–275 of 287

Sandia/CA receives joint awards with LLNL for environmental stewardship
Post, July 24, 2012 • This summer, the National Nuclear Security Administration (NNSA) announced the Pollution Prevention (P2) awards, given to national laboratories and sites for innovative efforts in environmental stewardship. Sandia/CA received recognition for two of our efforts that were conducted jointly with Lawrence Livermore National Laboratory (LLNL). The first award went to the...

Sandia/CRF Receive R&D100 Award for Cooler technology
Post, August 14, 2012 • Sandia was a recipient of the prestigious R&D100 award for work on the Sandia Cooler, a technology developed by Jeff Koplow at the CRF. The Cooler, which was featured in an earlier CRF story, can significantly reduce the energy needed to cool processor chips in data centers and large-scale computing...

Sandia/CRF Receive R&D100 Award for Cooler technology
Post, August 14, 2012 • Sandia was a recipient of the prestigious R&D100 award for work on the Sandia Cooler, a technology developed by Jeff Koplow at the CRF. The Cooler, which was featured in an earlier CRF story, can significantly reduce the energy needed to cool processor chips in data centers and large-scale computing...

Scrambling molecules with light
Post, August 23, 2011 • Isotopic labeling of chemical compounds is one of the most powerful techniques for understanding how chemical reactions proceed. Adding an extra neutron to an atom’s nucleus [changing hydrogen (H) into deuterium (D) for example] doesn’t usually change chemistry, but the extra mass of the heavier isotope allows scientists to track...

September 2014 Visitor Departures
Post, November 25, 2014 • WDTS departure Christopher Nilsen 6/23/2014-9/4/2014 Chuck Mueller Chuck Mueller, left, and WDTS intern Christopher Nilsen. Christopher Nilsen was one of the many of the students and faculty visiting the CRF under the DOE Office of Science Workforce Development for Teachers and Scientists (WDTS) program. Damir Valiev 10/7/2013 – 9/1/2014 Jackie...
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Spatially and Temporally Resolved Diagnostics
Page • Understanding complex chemical physics systems often involves correlations among properties, making multidimensional diagnostics a natural tool. The CRF invents and employs imaging methods to probe such correlations: from ion imaging, which directly measures correlated angular and velocity distributions in single molecular collisions or photodissociation to four-dimensional imaging of chemical processes...

Spectroscopy and Light-Matter Interactions
Page • CRF researchers have made breakthroughs that support chemical physics research in areas such as non-linear spectroscopy, ion imaging, 3-dimensional optical imaging, multiplexed photoionization/photoelectron spectroscopy, and x-ray absorption and scattering. Some of the resulting capabilities are described in the Experimental Capabilities section. Many of these breakthroughs are based in fundamental research...

Sponsors & Partnerships
Page • The CRF pursues collaborations with industry, academia, and government to conduct leading-edge research that helps the U.S. Department of Energy meet national goals, one of which is to help industry resolve challenging technical issues that, in turn, can impact U.S. economic competitiveness. Sponsors Several U.S. Department of Energy program areas...

Spray Combustion Consortium formed to improve engine design
Post, January 13, 2017 • by Michael Padilla Sandia National Laboratories has formed an industry-funded Spray Combustion Consortium to better understand fuel injection by developing modeling tools. Control of fuel sprays is key to the development of clean, affordable fuel-efficient engines. Intended for industry, software vendors and national laboratories, the consortium provides a direct path...

Spray Combustion Laboratories
Page • Fuel spray injection will be a key element for enabling high-efficiency, low-emission engines of the future. Understanding the spray combustion process is critical, however, investigating engine combustion processes is challenging due to factors affecting the in-cylinder environment where mixing with fuel sprays occurs. The temperature, pressure, density, and composition of...

Stochastic Systems
Page • Stochastic models are useful in chemical modeling at intermediate scales. Our work in this area includes the development of numerical methods for dealing with stiffness in the chemical Langevin equation and in kinetic Monte Carlo models. Stiffness in Stochastic Chemical Models We have developed time integration strategies that target efficient...

Student Interns Return to the CRF
Post, August 30, 2011 • This summer’s interns include (left to right) Romina Rodiguez, Nathan Greco, Daniel Nilson, Cassandra Janakos, Alexander Lloyd, Calvin Ball, Mari Sanchez, and Matthew Morabito (not pictured). The Summer Technical Student Internship Program at Sandia National Laboratories provides opportunities for undergraduate and graduate students majoring in science, math, engineering, and other...

Students and Professors Spend the Summer at Sandia under DOE’s WDTS Program
Post, August 20, 2014 • This past summer, the CRF was the research home to 11 students and 2 professors who participated in the DOE Office of Science's Workforce Development for Teachers and Scientists (WDTS) Program. By allowing students and professors to conduct research internships at national laboratories, this program is helping to develop the...
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Suhas Kumar
Staff Page • Materials Physics. Biography I make computers smarter by combining nanotechnology and artificial intelligence. Education Ph.D., Stanford University Publications
Image of Suhas Kumar

Supercomputing In the Media: National Geographic
Post, June 26, 2012 • Kudos to Sandian Dr. Jackie Chen, whose work on exascale computing systems was recently featured in the National Geographic’s ‘Daily News’ section. Entitled “Supercomputing Power Could Pave the Way to Energy-Efficient Engines,” the news article focused on how the world’s most powerful supercomputers provide critical knowledge to spur the design...

Tandem Mass Spectrometry
Page • Although a powerful technique, analyzing molecules based on mass does not always enable us to identify specific molecular structures. Photoionization spectroscopy can yield isomer-specific information from mass spectrometry, but as the molecules grow larger in the chemistry leading to soot formation, for example, the photoionization spectra are no longer diagnostic....

The CRF Hosts the Livermore Rotary Club
Post, August 14, 2012 • Transportation Energy Center Director Bob Carling recently hosted a visit of nearly 100 members of the Livermore Rotary Club. Dr. Carling presented an overview of the Livermore Valley Open Campus and of the work done at Sandia/CA. CRF researchers then conducted tours of the Computational Combustion and Chemistry Lab, the...

The CRF Participates in 2012 DOE Annual Merit Review
Post, July 3, 2012 • Various staff members from the CRF participated in the 2012 U.S. Department of Energy (DOE) Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting (AMR). The AMR is sponsored by the Hydrogen and Fuel Cells Program and the Vehicle Technologies Program. CRF researchers...

Theoretical Chemistry
Page • Project/Program Description We use electronic structure methods, master equations, and molecular dynamics to explore and interpret transformations at the atomic scale in molecular systems. Impact Statement Figure 1 The potential energy surface of the acetylene + acetylene reaction. We are interested in chemical reactions and structural changes in molecules initiated...

Thermochemical integration key to improving the efficiency of bio-ethanol production
Post, May 16, 2011 • A recently concluded CRF study as revealed the important role of combustion in the efficient operation of cellulosic ethanol plants for producing  biofuels. Unlike ‘first-generation’ ethanol derived from the fermentation of sugar or starch sources (such as corn), future production of ethanol in the United States is expected (and indeed...
Figure 2. Schematic of the modeled, prototypical lignocellulosic biochemical ethanol plant utilizing separate enzymatic hydrolysis and fermentation steps.|Figure 1. Typical composition of a softwood tree, in this case hybrid poplar.|Figure 3. Energy inputs and outputs (on the basis of lower heating value, left pie chart) and exergy inputs and outputs (right pie chart) for the conventional technology biochemical process design case.

Timothy S. Zwier
Staff Page • Distinguished Member of Technical Staff, Gas Phase Chemical Physics Program, Combustion Research Facility. Biography Tim Zwier joined Sandia National Laboratories’ Combustion Research Facility (CRF) in January 2020 after spending much of his independent research career in academia. Zwier had served as PhD research advisor for more than 40 graduate students...

Turbulent Jet Flame Database Generated for Sooty Fuels
Post, August 30, 2011 • Figure 1. Design drawings of burner (a and b), showing the central fuel tube surrounded by a perforated plate that supports small pilot flames for stabilizing high-speed flames. Photograph (c) of pilot flames and the base of an ethylene jet flame. The CRF has a long and distinguished history of...

Two CRF Papers Named Distinguished for 34th International Symposium on Combustion
Post, October 18, 2013 • Two papers by CRF researchers have been named Distinguished Papers for the 34th International Symposium on Combustion. “Synchrotron photoionization measurements of fundamental autoignition reactions: Product formation in low-temperature isobutane oxidation” by Arkke J. Eskola, Oliver Welz, John D. Savee, David L. Osborn, Craig A. Taatjes (all Combustion Research Facility) was...
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Ultrafast Broad-band Infrared Spectroscopy
Page • Technical Details We are interested in following ultrafast vibrational and structural dynamics in electronic ground and excited states of gas phase and condensed phase systems. To this end, we have built a laser-driven plasma-based source of broadband infrared (BBIR) pulses for use as probes in transient infrared absorption spectroscopy following...

Uncertainty Quantification
Page • Figure 1 Our work in uncertainty quantification (UQ) includes a range of research activities having to do with the quantification of uncertainty in computational model inputs and outputs. The work involves a focus on the development of numerical methods and open source software for statistical learning from data, forward propagation...
Results 251–275 of 287