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Chaparral Model 60 Infrasound Sensor Evaluation

Slad, George W.; Merchant, Bion J.

Sandia National Laboratories has tested and evaluated an infrasound sensor, the Model 60 manufactured by Chaparral Physics, a Division of Geophysical Institute of the University of Alaska, Fairbanks. The purpose of the infrasound sensor evaluation was to determine a measured sensitivity, transfer function, power, self-noise, dynamic range, and seismic sensitivity. The Model 60 infrasound sensor is a new sensor developed by Chaparral Physics intended to be a small, rugged sensor used in more flexible application conditions.

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TYPE SAND Report YEAR 2016
DOIOSTI

Exploring the Interplay of Resilience and Energy Consumption for a Task-Based Partial Differential Equations Preconditioner

Rizzi, Francesco; Foulk, James W.; Sargsyan, Khachik; Mycek, Paul; Safta, Cosmin; Le Maitre, Olivier; Knio, Omar; Debusschere, Bert

We discuss algorithm-based resilience to silent data corruption (SDC) in a task- based domain-decomposition preconditioner for partial differential equations (PDEs). The algorithm exploits a reformulation of the PDE as a sampling problem, followed by a solution update through data manipulation that is resilient to SDC. The implementation is based on a server-client model where all state information is held by the servers, while clients are designed solely as computational units. Scalability tests run up to ~ 51 K cores show a parallel efficiency greater than 90%. We use a 2D elliptic PDE and a fault model based on random single bit-flip to demonstrate the resilience of the application to synthetically injected SDC. We discuss two fault scenarios: one based on the corruption of all data of a target task, and the other involving the corruption of a single data point. We show that for our application, given the test problem considered, a four-fold increase in the number of faults only yields a 2% change in the overhead to overcome their presence, from 7% to 9%. We then discuss potential savings in energy consumption via dynamics voltage/frequency scaling, and its interplay with fault-rates, and application overhead.

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TYPE SAND Report YEAR 2016
DOIOSTI

On the Path to SunShot: Advancing Concentrating Solar Power Technology, Performance, and Dispatchability

Mehos, Mark; Turchi, Craig; Jorgensen, Jennie; Denholm, Paul; Ho, Clifford K.; Armijo, Kenneth M.

Since the SunShot Vision Study (DOE 2012) was published, global deployment of concentrating solar power (CSP) has increased threefold to nearly 4,500 MW, with a similar threefold increase in operational capacity to 1,650 MW within the United States. Growth in U.S. CSP capacity has primarily been driven by policy support at the state and federal levels. State-driven renewable portfolio standards (RPSs), combined with a 30% federal investment tax credit (ITC) and federal loan guarantees, provided the opportunity for CSP developers to kick-start construction of CSP plants throughout the Southwest. Figure ES-1 demonstrates that deployment and private- and public-sector research and development have led to dramatic cost reductions that have placed CSP well on the path to reaching the U.S. Department of Energy’s SunShot Initiative goal of 6 cents/kWh by 2020. In comparing the estimated capital costs from the SunShot Vision Study and the current analysis, we find that parabolic trough solar-field costs have fallen more rapidly than predicted, although the drop in solar-field costs was offset by the additional costs of moving from a wet-cooled power block in 2010 to a more expensive dry-cooled power block in 2015. The predicted 2015 decline in tower costs was in line with expectations, primarily driven by reduced heliostat costs. Figure ES-1 shows the reduction in levelized cost of electricity (LCOE) for both parabolic trough and tower systems, in addition to the projected 2020 SunShot target.

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TYPE Other Report YEAR 2016
DOIOSTI

Ultra-Wide-Bandgap Semiconductors for Generation-After-Next Power Electronics

Kaplar, Robert; Allerman, A.A.; Armstrong, Andrew A.; Crawford, Mary H.; Fischer, Arthur J.; Dickerson, Jeramy; King, Michael P.; Baca, Albert G.; Douglas, Erica A.; Sanchez, Carlos A.; Neely, Jason C.; Flicker, Jack D.; Zutavern, Fred J.; Mauch, Daniel L.; Brocato, Robert W.; Rashkin, Lee J.; Delhotal, Jarod J.; Fang, Lu; Kizilyalli, Isik; Aktas, Ozgur

Abstract not provided.

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TYPE Conference Poster YEAR 2016
OSTI

Detailed Description of the Derivation of the Silicon Damage Response Function

Griffin, Patrick J.

This report provides a set of consistent definitions for radiation damage metrics relevant to the modeling of displacement damage in materials. The limitations/approximations built into the various metrics are discussed, as are the intended applications that gave rise to community use of the damage metrics. Numerical tabulations are provided, based on the latest nuclear data, for recommended values of the neutron displacement kerma factor and various NRT-based damage energy metrics in silicon.

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TYPE SAND Report YEAR 2016
DOIOSTI

TA-III Sub-Area Plan: Overview & Summary

Cipriani, Ralph J.

The TA-III / Remote Areas Sub-Area Plan is currently under development. Planning concepts being considered are: (1) Continue to use and preserve large tracts of land for large-scale mission-related testing, associated buffers, waste management, and open space; (2) Identify investments to protect, sustain, and recapitalize these specialized assets; (3) Identify opportunities to consolidate common functions in order to reduce operating costs; (4) Explore the potential to enhance employee support facilities and services for those who work in remote areas; and (5) Extend / fill critical gaps in telecommunication infrastructure to TA-III and remote areas.

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TYPE Other Report YEAR 2016
DOIOSTI

TA-V Sub-Area Plan: Overview & Summary

Cipriani, Ralph J.

The TA-V Sub-Area Plan is currently under development. A major input into the plan will be the results of a strategic planning study to be conducted in FY 2016 that will investigate the long-term programmatic future for TA-V. Anticipated planning issues to be explored include: (1) Nature of future programs and facility needs; (2) Recapitalization needed to sustain key facilities and resources; (3) Validation of existing land use as a remote nuclear research and radiation testing site; (4) Physical security requirements including the need to sustain or reconfigure the existing Perimeter Intrusion Detection and Assessment System (PIDAS); (5) Environmental remediation and restoration strategy; and (6) Site design improvements needed to enhance the quality of the working environment.

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TYPE Other Report YEAR 2016
DOIOSTI

KTF Sub-Area Plan: Overview & Summary

Cipriani, Ralph J.

The KTF Sub-Area Plan is currently under development. Finalization awaits decisions regarding the long-term future of the site. The sub-area plan will build upon previous master plans, facilities and infrastructure (F&I) revitalization plans, and building studies. Planning concepts under consideration are: (1) Replace facilities with a combination of new permanent and non-permanent space; and (2) Complete deferred maintenance at remaining facilities.

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TYPE Other Report YEAR 2016
DOIOSTI
Results 43201–43400 of 99,299
Results 43201–43400 of 99,299