National Library of Energy BETA

Sample records for junction umtra project

  1. Ground Water Compliance Action Plan for the Durango, Colorado,UMTRA Project Site

    Office of Legacy Management (LM)

    for the U.S. Department of Energy Approved for public release; distribution is unlimited. Ground Water Compliance Action Plan for the Durango, Colorado, UMTRA Project Site February 2008 This page intentionally left blank U0165200 Ground Water Compliance Action Plan for the Durango, Colorado, UMTRA Project Site February 2008 Prepared by U.S. Department of Energy Grand Junction Office Grand Junction, Colorado Work Performed under DOE Contract No. DE-AC13-02GJ79491 This page intentionally left

  2. UMTRA project list of reportable occurrences

    SciTech Connect (OSTI)

    Not Available

    1994-04-01

    This UMTRA Project List of Reportable occurrences is provided to facilitate efficient categorization of reportable occurrences. These guidelines have been established in compliance with DOE minimum reporting requirements under DOE Order 5000.3B. Occurrences are arranged into nine groups relating to US Department of Energy (DOE) Uranium Mill Tailings Remedial Action (UMTRA) Project operations for active sites. These nine groupings are provided for reference to determined whether an occurrence meets reporting requirement criteria in accordance with the minimum reporting requirements. Event groups and significance categories that cannot or will not occur, and that do not apply to UMTRA Project operations, are omitted. Occurrence categorization shall be as follows: Group 1. Facility Condition; Group 2. Environmental; Group 3. Personnel Safety; Group 4. Personnel Radiation Protection; Group 5. Safeguards and Security; Group 6. Transportation; Group 7. Value Basis Reporting; Group 8. Facility Status; and Group 9. Cross-Category Items.

  3. Ground Water Compliance Action Plan for the Old Rifle, Colorado, UMTRA Project Site

    Office of Legacy Management (LM)

    GJO-2000-177-TAR MAC-GWRFL 1.9 Ground Water Compliance Action Plan for the Old Rifle, Colorado, UMTRA Project Site December 2001 Work Performed Under DOE Contract No. DE-AC13-96GJ87335 for the U.S. Department of Energy Approved for public release; distribution is unlimited. GJO-2000-177-TAR MAC-GWRFL 1.9 Ground Water Compliance Action Plan for the Old Rifle, Colorado, UMTRA Project Site December 2001 Prepared by U.S. Department of Energy Grand Junction Office Grand Junction, Colorado Project

  4. Final Environmental Assessment of Ground Water Compliance at the Slick Rock, Colorado, UMTRA Project Site

    Office of Environmental Management (EM)

    458 Environmental Assessment of Ground Water Compliance at the Slick Rock, Colorado, UMTRA Project Sites Final February 2003 Prepared by U.S. Department of Energy Grand Junction Office Grand Junction, Colorado Work Performed Under DOE Contract No. DE-AC13-02GJ79491 DOE Grand Junction Office EA of Ground Water Compliance at the Slick Rock Sites February 2003 Final Page iii Contents Page Acronyms and

  5. U.S. Department of Energy UMTRA Ground Water Project Ground Water Pumping and Monitoring Plan

    Office of Legacy Management (LM)

    GWMON 1.12-1 U.S. Department of Energy UMTRA Ground Water Project Ground Water Pumping and Monitoring Plan for the Land Farm Pilot Test Monument Valley, Arizona August 2000 Prepared by U.S. Department of Energy Grand Junction Ofice Grand Junction, Colorado Project Number UGW-5 1 1-001 5-21-000 Document Number U0106701 This page intentionally left blank Document Number U0106701 Contents Contents 1.0 Introduction

  6. UMTRA Surface Project management action process document: Final. Revision 2

    SciTech Connect (OSTI)

    1996-06-01

    Title 1 of the UMTRCA authorized the DOE to undertake remedial actions at these designed sites and associated vicinity properties (VP), which contain uranium mill tailings and other residual radioactive materials (RRM) derived from the processing sites. Title 2 of the UMTRCA addresses uranium mill sites that were licensed at the time the UMTRCA was enacted. Cleanup of these Title 2 sites is the responsibility of the licensees. The cleanup of the Title 1 sites has been split into two separate projects: the Surface Project, which deals with the mill buildings, tailings, and contaminated soils at the sites and VPs; and the Ground Water Project, which is limited to the contaminated ground water at the sites. This management action process (MAP) document discusses the Uranium Mill Tailings Remedial Action (UMTRA) Surface Project. Since its inception through March 1996, the Surface Project (hereinafter called the Project) has cleaned up 16 of the 24 designated processing sites and approximately 5,000 VPs, reducing the risk to human health and the environment posed by the uranium mill tailings. Two of the 24 sites, Belfield and Bowman, North Dakota, will not be remediated at the request of the state, reducing the total number of sites to 22. By the start of FY1998, the remaining 6 processing sites and associated VPs will be cleaned up. The remedial action activities to be funded in FY1998 by the FY1998 budget request are remediation of the remaining Grand Junction, Colorado, VPs; closure of the Cheney disposal cell in Grand Junction, Colorado; and preparation of the completion reports for 4 completed sites.

  7. UMTRA project water sampling and analysis plan, Tuba City, Arizona

    SciTech Connect (OSTI)

    1996-02-01

    Planned, routine ground water sampling activities at the U.S. Department of Energy (DOE) Uranium Mill Tailings Remedial Action (UMTRA) Project site in Tuba City, Arizona, are described in the following sections of this water sampling and analysis plan (WSAP). This plan identifies and justifies the sampling locations, analytical parameters, detection limits, and sampling frequency for the stations routinely monitored at the site. The ground water data are used for site characterization and risk assessment. The regulatory basis for routine ground water monitoring at UMTRA Project sites is derived from the U.S. Environmental Protection Agency (EPA) regulations in 40 CFR Part 192 (1994) and the final EPA standards of 1995 (60 FR 2854). Sampling procedures are guided by the UMTRA Project standard operating procedures (SOP) (JEG, n.d.), and the most effective technical approach for the site.

  8. Review and analysis of proposed EPA groundwater standards for the UMTRA Project. [Uranium Mill Tailings Remedial Action (UMTRA) Project

    SciTech Connect (OSTI)

    Not Available

    1987-10-01

    The Title I groundwater standards for inactive uranium mill tailings sites, which were promulgated on January 5, 1983, by the US Environmental Protection Agency (EPA) for the Uranium Mill Tailings Remedial Action (UMTRA) Project, were remanded to the EPA on September 3, 1985, by the US Tenth Circuit Court of Appeals. The Court instructed the EPA to compile general groundwater standards for all sites. On September 24, 1987, the EPA published proposed standards in response to the remand. This Summary Report includes an evaluation of the potential effects of the proposed EPA groundwater standards on the UMTRA Project as well as a discussion of the DOE's position on the proposed standards. This report is accompanied by a detailed Technical Report and Appendices which provide supporting information and analyses. This Summary Report results from a study undertaken to: determine the impact of the proposed standards on the UMTRA Project; and recommend provisions for the implementation of the final standards that will minimize adverse impact to the conduct of the UMTRA Project while ensuring protection of human health and the environment. Specifically, the following were considered: the flexibility of the proposed standards; interpretations of the proposed standards; the extent of aquifer restoration that may be required to implement the proposed standards at each site; the costs of aquifer restoration; and design changes necessary to meet the standards.

  9. UMTRA project disposal cell cover biointrusion sensitivity assessment, Revision 1

    SciTech Connect (OSTI)

    1995-10-01

    This study provides an analysis of potential changes that may take place in a Uranium Mill Tailings Remedial Action (UMTRA) Project disposal cell cover system as a result of plant biointrusion. Potential changes are evaluated by performing a sensitivity analysis of the relative impact of root penetrations on radon flux out of the cell cover and/or water infiltration into the cell cover. Data used in this analysis consist of existing information on vegetation growth on selected cell cover systems and information available from published studies and/or other available project research. Consistent with the scope of this paper, no new site-specific data were collected from UMTRA Project sites. Further, this paper does not focus on the issue of plant transport of radon gas or other contaminants out of the disposal cell cover though it is acknowledged that such transport has the potential to be a significant pathway for contaminants to reach the environment during portions of the design life of a disposal cell where plant growth occurs. Rather, this study was performed to evaluate the effects of physical penetration and soil drying caused by plant roots that have and are expected to continue to grow in UMTRA Project disposal cell covers. An understanding of the biological and related physical processes that take place within the cover systems of the UMTRA Project disposal cells helps the U.S. Department of Energy (DOE) determine if the presence of a plant community on these cells is detrimental, beneficial, or of mixed value in terms of the cover system`s designed function. Results of this investigation provide information relevant to the formulation of a vegetation control policy.

  10. UMTRA Ground Water Project management action process document

    SciTech Connect (OSTI)

    1996-03-01

    A critical U.S. Department of Energy (DOE) mission is to plan, implement, and complete DOE Environmental Restoration (ER) programs at facilities that were operated by or in support of the former Atomic Energy Commission (AEC). These facilities include the 24 inactive processing sites the Uranium Mill Tailings Radiation Control Act (UMTRCA) (42 USC Section 7901 et seq.) identified as Title I sites, which had operated from the late 1940s through the 1970s. In UMTRCA, Congress acknowledged the potentially harmful health effects associated with uranium mill tailings and directed the DOE to stabilize, dispose of, and control the tailings in a safe and environmentally sound manner. The UMTRA Surface Project deals with buildings, tailings, and contaminated soils at the processing sites and any associated vicinity properties (VP). Surface remediation at the processing sites will be completed in 1997 when the Naturita, Colorado, site is scheduled to be finished. The UMTRA Ground Water Project was authorized in an amendment to the UMTRCA (42 USC Section 7922(a)), when Congress directed DOE to comply with U.S. Environmental Protection Agency (EPA) ground water standards. The UMTRA Ground Water Project addresses any contamination derived from the milling operation that is determined to be present at levels above the EPA standards.

  11. UMTRA project water sampling and analysis plan, Monument Valley, Arizona

    SciTech Connect (OSTI)

    Not Available

    1994-04-01

    The Monument Valley Uranium Mill Tailings Remedial Action (UMTRA) Project site in Cane Valley is a former uranium mill that has undergone surface remediation in the form of tailings and contaminated materials removal. Contaminated materials from the Monument Valley (Arizona) UMTRA Project site have been transported to the Mexican Hat (Utah) UMTRA Project site for consolidation with the Mexican Hat tailings. Tailings removal was completed in February 1994. Three geologic units at the site contain water: the unconsolidated eolian and alluvial deposits (alluvial aquifer), the Shinarump Conglomerate (Shinarump Member), and the De Chelly Sandstone. Water quality analyses indicate the contaminant plume has migrated north of the site and is mainly in the alluvial aquifer. An upward hydraulic gradient in the De Chelly Sandstone provides some protection to that aquifer. This water sampling and analysis plan recommends sampling domestic wells, monitor wells, and surface water in April and September 1994. The purpose of sampling is to continue periodic monitoring for the surface program, evaluate changes to water quality for site characterization, and provide data for the baseline risk assessment. Samples taken in April will be representative of high ground water levels and samples taken in September will be representative of low ground water levels. Filtered and nonfiltered samples will be analyzed for plume indicator parameters and baseline risk assessment parameters.

  12. UMTRA project water sampling and analysis plan, Naturita, Colorado. Revision 1

    SciTech Connect (OSTI)

    1995-09-01

    Planned, routine ground water sampling activities for calendar year 1995 to 1997 at the US Department of Energy (DOE) Uranium Mill Tailings Remedial Action (UMTRA) Project site near Naturita, Colorado, are described in this water sampling and analysis plan. The following plan identifies and justifies the sampling locations, analytical parameters, detection limits, sampling frequency, and specific rationale for each routine monitoring station at the site. The regulatory basis for routine ground water monitoring at UMTRA Project sites is derived from the US Environmental Protection Agency (EPA) regulations in 40 CFR Part 192. Sampling procedures are guided by the UMTRA Project standard operating procedures (SOP) (JEG, n.d.), the Technical Approach Document (TAD) (DOE, 1989), and the most effective technical approach for the site.

  13. Review and analysis of proposed EPA groundwater standards for the UMTRA Project. Summary report

    SciTech Connect (OSTI)

    Not Available

    1987-10-01

    The Title I groundwater standards for inactive uranium mill tailings sites, which were promulgated on January 5, 1983, by the US Environmental Protection Agency (EPA) for the Uranium Mill Tailings Remedial Action (UMTRA) Project, were remanded to the EPA on September 3, 1985, by the US Tenth Circuit Court of Appeals. The Court instructed the EPA to compile general groundwater standards for all sites. On September 24, 1987, the EPA published proposed standards in response to the remand. This Summary Report includes an evaluation of the potential effects of the proposed EPA groundwater standards on the UMTRA Project as well as a discussion of the DOE`s position on the proposed standards. This report is accompanied by a detailed Technical Report and Appendices which provide supporting information and analyses. This Summary Report results from a study undertaken to: determine the impact of the proposed standards on the UMTRA Project; and recommend provisions for the implementation of the final standards that will minimize adverse impact to the conduct of the UMTRA Project while ensuring protection of human health and the environment. Specifically, the following were considered: the flexibility of the proposed standards; interpretations of the proposed standards; the extent of aquifer restoration that may be required to implement the proposed standards at each site; the costs of aquifer restoration; and design changes necessary to meet the standards.

  14. Environmental Assessment of Ground Water Compliance at the Durango, Colorado, UMTRA Project Site

    SciTech Connect (OSTI)

    N /A

    2002-11-29

    The U.S. Department of Energy (DOE) is proposing a ground water compliance strategy for the Uranium Mill Tailings Remedial Action (UMTRA) Project site near Durango, Colorado. DOE has prepared this environmental assessment to provide the public with information concerning the potential effects of this proposed strategy.

  15. Annual report on the U.S. Department of Energy`s cultural resource activities at Colorado UMTRA Project sites for October 1995--September 1996

    SciTech Connect (OSTI)

    1996-09-01

    This report summarizes the results of cultural resource activities conducted by the U.S. Department of Energy (DOE) at Uranium Mill Tailings Remedial Action (UMTRA) Project sites in Colorado for the period of October 1, 1995 through September 30, 1996. The inactive uranium mill tailings sites in Colorado are at Durango, Grand Junction, Gunnison, Maybell, Naturita, Rifle, and Slick Rock. On December 6, 1984, the DOE, the Advisory Council on Historic Preservation, and the Colorado State Historic Preservation Officer (SHPO) entered into a programmatic memorandum of understanding (PMOU). This PMOU requires the DOE to fulfillment of its obligations under various state and federal regulations for the protection and preservation of cultural resources. This report provides the state of Colorado with an annual report on the cultural resource activities performed for all UMTRA Project sites in Colorado. Due to the completion of surface activities at the UMTRA Project sites, this will be the last annual report to the state of Colorado. Cultural resources activities subsequent to this report will be reported to the state through site-specific correspondence.

  16. UMTRA Project Site Observational Work Plan, Mexican Hat, Utah

    SciTech Connect (OSTI)

    Not Available

    1994-09-01

    Surface cleanup activities at the Mexican Hat UMTRA processing site are nearing completion. Ground Water contamination at the Mexican Hat site is a result of uranium milling operations. The extent of residual process water has been identified, and it is limited to the uppermost aquifer in the vicinity of the site. Deeper aquifers are not affected because of an upward hydraulic gradient and the presence of a confining unit (the deeper aquifers are protected by hydrogeologic isolation). The uppermost unit is returning to its pre-milling, mainly unsaturated state. The unit that contains the contaminated water is not a ground water resource because it qualifies as Class III (limited use) based on limited yield. Ground water in the uppermost unit is currently not used and is not anticipated to be used as a ground water resource. The nearby San Juan River and a converted oil exploration well provide all of the water needs for the area. There are no current threats to human health or livestock; and, because the zone of contamination does not represent a ground water resource, none are anticipated in the future. There are, however, seeps where contaminated water is exposed at land surface. The seeps create potential exposure pathways for plants and wildlife. It is not known at this time if there is a risk to the environment. Additional investigations are needed and are described in this document to confirm the presence or absence of potential environmental risks. Additional hydrogeologic investigations are not required. The proposed ground water compliance strategy for the site is no remediation, because the ground water in the uppermost aquifer (which is also the zone of contamination) qualifies for supplemental standards based on Class III, limited yield, and because there are no threats to human health. Domestic and agricultural water is pumped from a deeper aquifer that is isolated from the contaminated zone.

  17. UMTRA Surface Project management action process document. Final report: Revision 1

    SciTech Connect (OSTI)

    1996-04-01

    A critical mission of the US Department of Energy (DOE) is the planning, implementation, and completion of environmental restoration (ER) programs at facilities that were operated by or in support of the former Atomic Energy Commission (AEC) from the late 1940s into the 1970s. Among these facilities are the 24 former uranium mill sites designed in the Uranium Mill Tailings Radiation Control Act (UMTRCA) of 1978 (42 USC {section} 7901 et seq.) Title 1 of the UMTRCA authorized the DOE to undertake remedial actions at these designated sites and associated vicinity properties (VP), which contain uranium mill tailings and other residual radioactive materials (RRM) derived from the processing sites. Title 2 of the UMTRCA addresses uranium mill sites that were licensed at the time the UMTRCA was enacted. Cleanup of these Title 2 sites is the responsibility of the licensees. The cleanup of the Title 1 sites has been split into two separate projects: the Surface Project, which deals with the mill buildings, tailings, and contaminated soils at the sites and VPs; and the Ground Water Project, which is limited to the contaminated ground water at the sites. This management action process (MAP) document discusses the Uranium Mill Tailings Remedial Action (UMTRA) Surface Project only; a separate MAP document has been prepared for the UMTRA Ground Water Project.

  18. Final audit report of remedial action construction at the UMTRA Project Mexican Hat, Utah -- Monument Valley, Arizona, sites

    SciTech Connect (OSTI)

    1995-10-01

    The final audit report for remedial action at the Mexican Hat, Utah, Monument Valley, Arizona, Uranium Mill Tailings Remedial Action (UMTRA) Project sites consists of a summary of the radiological surveillances/audits, quality assurance (QA) in-process surveillances, and QA remedial action close-out inspections performed by the US Department of Energy (DOE) and the Technical Assistance Contractor (TAC); on-site construction reviews (OSCR) performed by the US Nuclear Regulatory Commission (NRC); and a surveillance performed by the Navajo Nation. This report refers to remedial action activities performed at the Mexican Hat, Utah--Monument Valley, Arizona, Uranium Mill Tailings Remedial Action (UMTRA) Project sites.

  19. Site observational work plan for the UMTRA Project site at Monument Valley, Arizona

    SciTech Connect (OSTI)

    1995-09-01

    The site observational work plan (SOWP) for the Monument Valley, Arizona, US Department of Energy (DOE) Uranium Mill Tailings Remedial Action (UMTRA) Project site is one of the first site-specific documents developed to achieve ground water compliance at the site. This SOWP applies information about the Monument Valley site to a regulatory compliance framework that identifies strategies that could be used to meet ground water compliance. The compliance framework was developed in the UMTRA Ground Water programmatic environmental impact statement (DOE, 1995). The DOE`s goal is to implement a cost-effective site strategy that complies with the US Environmental Protection Agency (EPA) ground water standards and protects human health and the environment. The compliance strategy that emerges in the final version of the SOWP will assess potential environmental impacts and provide stakeholder a forum for review and comment. When the compliance strategy is acceptable, it will be detailed in a remedial action plan that will be subject to review by the state and/or tribe and concurrence by the US Nuclear Regulatory Commission (NRC). Information available for the preparation of this SOWP indicates active remediation is the most likely compliance strategy for the Monument Valley site. Additional data are needed to determine the most effective remediation technology.

  20. Environmental Assessment of Ground Water Compliance at the Gunnison, Colorado, UMTRA Project Site

    SciTech Connect (OSTI)

    N /A

    2002-08-13

    The U.S. Department of Energy (DOE) is in the process of selecting a ground water compliance strategy for the Gunnison, Colorado, Uranium Mill Tailings Remedial Action (UMTRA) Project site. This Environmental Assessment (EA) discusses two alternatives and the effects associated with each. The two alternatives are (1) natural flushing coupled with institutional controls and continued monitoring and (2) no action. The compliance strategy must meet U.S. Environmental Protection Agency (EPA) ground water standards defined in Title 40 ''Code of Federal Regulations'' Part 192, Subpart B, in areas where ground water beneath and around the site is contaminated as a result of past milling operations. It has been determined that contamination in the ground water at the Gunnison site consists of soluble residual radioactive material (RRM) as defined in the Uranium Mill Tailings Radiation Control Act (UMTRCA).

  1. Surface and subsurface cleanup protocol for radionuclides, Gunnison, Colorado, UMTRA project processing site. Final [report

    SciTech Connect (OSTI)

    Not Available

    1993-09-01

    Surface and subsurface soil cleanup protocols for the Gunnison, Colorado, processing sits are summarized as follows: In accordance with EPA-promulgated land cleanup standards (40 CFR 192), in situ Ra-226 is to be cleaned up based on bulk concentrations not exceeding 5 and 15 pCi/g in 15-cm surface and subsurface depth increments, averaged over 100-m{sup 2} grid blocks, where the parent Ra-226 concentrations are greater than, or in secular equilibrium with, the Th-230 parent. A bulk interpretation of these EPA standards has been accepted by the Nuclear Regulatory Commission (NRC), and while the concentration of the finer-sized soil fraction less than a No. 4 mesh sieve contains the higher concentration of radioactivity, the bulk approach in effect integrates the total sample radioactivity over the entire sample mass. In locations where Th-230 has differentially migrated in subsoil relative to Ra-226, a Th-230 cleanup protocol has been developed in accordance with Supplemental Standard provisions of 40 CFR 192 for NRC/Colorado Department of Health (CDH) approval for timely implementation. Detailed elements of the protocol are contained in Appendix A, Generic Protocol from Thorium-230 Cleanup/Verification at UMTRA Project Processing Sites. The cleanup of other radionuclides or nonradiological hazards that pose a significant threat to the public and the environment will be determined and implemented in accordance with pathway analysis to assess impacts and the implications of ALARA specified in 40 CFR 192 relative to supplemental standards.

  2. Site observational work plan for the UMTRA Project Site at Tuba City, Arizona

    SciTech Connect (OSTI)

    1994-09-01

    The requirements for ground water compliance for Uranium Mill Tailings Remedial Action (UMTRA) Project sites, including the Tuba City, Arizona, site, are found in the Uranium Mill Tailings Radiation Control Act; Subparts B and C of the U.S. Environmental Protection Agency`s Health and Environmental Protection Standards for Uranium and Thorium Mill Tailings (40 CFR 192 (1994)), and the associated proposed 1987 standards (52 FR 36000). During the surface remedial action, an estimated 1,400,000 cubic yards (yd{sup 3}) (1,100,000 cubic meters [m{sup 3}]) of uranium mill tailings and other contaminated materials were consolidated and stabilized in place in an unlined disposal cell covering 50 acres (20 hectares). The surface remedial action was completed in April 1990. Ground water beneath the Tuba City site was contaminated by subsurface migration of water from uranium ore processing activities. The main source of contaminants was water from the tailings piles that began in 1956 when the mill opened and ended in 1966 when the mill closed. A total of 800,000 tons (725,000 tonnes) of uranium ore were processed onsite over a 10-year period. Two processes were used to refine the ore: an acid leach process and a sodium carbonate alkaline process. Water from these tailings then seeped into the ground and migrated downward to the ground water. The Tuba City site is currently in a post-stabilization, prelicensing status. The preliminary ground water compliance strategy at the Tuba City site is active remediation. The specific technology to be evaluated is in situ bioremediation. This selection was made because of the potential ability of bioremediation to reduce concentrations to lower levels than a conventional extraction system and to minimize disturbance of the water resource.

  3. Site observational work plan for the UMTRA Project site at Tuba City, Arizona

    SciTech Connect (OSTI)

    Not Available

    1994-09-01

    The requirements for ground water compliance for Uranium Mill Tailings Remedial Action (UMTRA) Project sites, including the Tuba City, Arizona, site, are found in the Uranium Mill Tailings Radiation Control Act; Subparts B and C of the U.S. Environmental Protection Agency`s Health and Environmental Protection Standards for Uranium and Thorium Mill Tailings (40 CFR 192 (1994)), and the associated proposed 1987 standards (52 FR 36000). During the surface remedial action, an estimated 1,400,000 cubic yards (yd{sup 3}) (1,100,000 cubic meters [m{sup 3}]) of uranium mill tailings and other contaminated materials were consolidated and stabilized in place in an unlined disposal cell covering 50 acres (20 hectares). The surface remedial action was completed in April 1990. Ground water beneath the Tuba City site was contaminated by subsurface migration of water from uranium ore processing activities. The main source of contaminants was water from the tailings piles that began in 1956 when the mill opened and ended in 1966 when the mill closed. 800,000 tons (725,000 tonnes) of uranium ore were processed onsite over a 10-year period. The wet tailings remaining after processing were placed as a slurry in three piles at the site. Water from these tailings then seeped into the ground and migrated downward to the ground water. The Tuba City site is currently in a post-stabilization, prelicensing status. The site is expected to remain in this status until licensed by the U.S. Nuclear Regulatory Commission (NRC) for long-term surveillance and maintenance. The preliminary ground water compliance strategy at the Tuba City site is active remediation-specific technology to be evaluated is in situ bioremediation. This selection was made because of the potential ability of bioremediation to reduce concentrations to lower levels than a conventional extraction system and to minimize disturbance of the water resource.

  4. DOE Grand Junction Projects Office Edgemont LTSP

    Office of Legacy Management (LM)

    DOE Grand Junction Projects Office Edgemont LTSP June 1996 Page ii Contents Page 1.0 Introduction ....................................................................................................................................... 1 1.1 Purpose ..................................................................................................................................... 1 1.2 Legal and Regulatory Requirements

  5. UMTRA Ground Water Project

    Office of Legacy Management (LM)

    Verification Monitoring Report for the Gunnison, Colorado, Processing Site September 2013 LMS/GUP/S10620 This page intentionally left blank LMS/GUP/S10620 2013 Verification Monitoring Report for the Gunnison, Colorado, Processing Site September 2013 This page intentionally left blank U.S. Department of Energy 2013 Verification Monitoring Report-Gunnison, Colorado, Processing Site September 2013 Doc. No. S10620 Page i Contents Abbreviations

  6. UMTRA Ground Water Project

    Office of Legacy Management (LM)

    Gunnison, Colorado, Processing Site September 2014 LMS/GUP/S12142 This page intentionally left blank LMS/GUP/S12142 2014 Verification Monitoring Report for the Gunnison, Colorado, Processing Site September 2014 This page intentionally left blank U.S. Department of Energy 2014 Verification Monitoring Report-Gunnison, Colorado, Processing Site September 2014 Doc. No. S12142 Page i Contents Abbreviations

  7. Economic impact study of the Uranium Mill Tailings Remedial Action project in Colorado: Colorado state fiscal year 1995

    SciTech Connect (OSTI)

    1995-12-01

    This Colorado economic impact study summarizes employment and economic benefits to the state from activities associated with the Uranium Mill Tailings Remedial Action (UMTRA) Project during Colorado state fiscal year (FY) 1995 (1 July 1994 through 30 June 1995). To capture employment information, a questionnaire was distributed to subcontractor employees at the active UMTRA Project sites of Grand Junction, Gunnison, Maybell, Naturita, Rifle, and Slick Rock, Colorado. Economic data were requested from the Remedial Action Contractor (RAC), the Technical Assistance Contractor (TAC) and the US Department of Energy (DOE). The most significant benefits associated with the UMTRA Project in Colorado are summarized.

  8. Uranium Mill Tailings Remedial Action Project 1994 environmental report

    SciTech Connect (OSTI)

    1995-08-01

    This annual report documents the Uranium Mill Tailings Remedial Action (UMTRA) Project environmental monitoring and protection program. The UMTRA Project routinely monitors radiation, radioactive residual materials, and hazardous constituents at associated former uranium tailings processing sites and disposal sites. At the end of 1994, surface remedial action was complete at 14 of the 24 designated UMTRA Project processing sites: Canonsburg, Pennsylvania; Durango, Colorado; Grand Junction, Colorado; Green River Utah, Lakeview, Oregon; Lowman, Idaho; Mexican Hat, Utah; Riverton, Wyoming; Salt Lake City, Utah; Falls City, Texas; Shiprock, New Mexico; Spook, Wyoming, Tuba City, Arizona; and Monument Valley, Arizona. Surface remedial action was ongoing at 5 sites: Ambrosia Lake, New Mexico; Naturita, Colorado; Gunnison, Colorado; and Rifle, Colorado (2 sites). Remedial action has not begun at the 5 remaining UMTRA Project sites that are in the planning stage. Belfield and Bowman, North Dakota; Maybell, Colorado; and Slick Rock, Colorado (2 sites). The ground water compliance phase of the UMTRA Project started in 1991. Because the UMTRA Project sites are.` different stages of remedial action, the breadth of the UMTRA environmental protection program differs from site to site. In general, sites actively undergoing surface remedial action have the most comprehensive environmental programs for sampling media. At sites where surface remedial action is complete and at sites where remedial action has not yet begun, the environmental program consists primarily of surface water and ground water monitoring to support site characterization, baseline risk assessments, or disposal site performance assessments.

  9. EA-0930: Facility Operations at the U.S. DOE Grand Junction Projects Office, Grand Junction, Colorado

    Broader source: Energy.gov [DOE]

    This EA evaluates the environmental impacts of the proposal to expand and upgrade the U.S. Department of Energy's Grand Junction Projects Office facilities and operations in Grand Junction, Colorado.

  10. Environmental Audit of the Grand Junction Projects Office

    SciTech Connect (OSTI)

    Not Available

    1991-08-01

    The Grand Junction Projects Office (GJPO) is located in Mesa County, Colorado, immediately south and west of the Grand Junction city limits. The US Atomic Energy Commission (AEC) established the Colorado Raw Materials Office at the present-day Grand Junction Projects Office in 1947, to aid in the development of a viable domestic uranium industry. Activities at the site included sampling uranium concentrate; pilot-plant milling research, including testing and processing of uranium ores; and operation of a uranium mill pilot plant from 1954 to 1958. The last shipment of uranium concentrate was sent from GJPO in January, 1975. Since that time the site has been utilized to support various DOE programs, such as the former National Uranium Resource Evaluation (NURE) Program, the Uranium Mill Tailings Remedial Action Project (UMTRAP), the Surplus Facilities Management Program (SFMP), and the Technical Measurements Center (TMC). All known contamination at GJPO is believed to be the result of the past uranium milling, analyses, and storage activities. Hazards associated with the wastes impounded at GJPO include surface and ground-water contamination and potential radon and gamma-radiation exposure. This report documents the results of the Baseline Environmental Audit conducted at Grand Junction Projects Office (GJPO) located in Grand Junction, Colorado. The Grand Junction Baseline Environmental Audit was conducted from May 28 to June 12, 1991, by the Office of Environmental Audit (EH-24). This Audit evaluated environmental programs and activities at GJPO, as well as GJPO activities at the State-Owned Temporary Repository. 4 figs., 12 tabs.

  11. UMTRA water sampling and analysis plan, Green River, Utah

    SciTech Connect (OSTI)

    Papusch, R.

    1993-12-01

    The purpose of this water sampling and analysis plan (WSAP) is to provide a basis for groundwater and surface water sampling at the Green River Uranium Mill Tailing Remedial Action (UMTRA) Project site. This WSAP identifies and justifies the sampling locations, analytical parameters, detection limits, and sampling frequency for the monitoring locations.

  12. Final Environmental Assessment and Finding of No Significant Impact: Ground Water Compliance at the Slick Rock, Colorado, UMTRA Project Site

    SciTech Connect (OSTI)

    N /A

    2003-03-13

    This environmental assessment addresses the environmental effects of a proposed action and the no action alternative to comply with U.S. Environmental Protection Agency (EPA) ground water standards at the Slick Rock, Colorado, Uranium Mill Tailings Remedial Action Project sites. The sites consist of two areas designated as the North Continent (NC) site and the Union Carbide (UC) site. In 1996, the U.S. Department of Energy (DOE) completed surface cleanup at both sites and encapsulated the tailings in a disposal cell 5 miles east of the original sites. Maximum concentration limits (MCLs) referred to in this environmental assessment are the standards established in Title 40 ''Code of Federal Regulations'' Part 192 (40 CFR 192) unless noted otherwise. Ground water contaminants of potential concern at the NC site are uranium and selenium. Uranium is more prevalent, and concentrations in the majority of alluvial wells at the NC site exceed the MCL of 0.044 milligram per liter (mg/L). Selenium contamination is less prevalent; samples from only one well had concentrations exceeding the MCL of 0.01 mg/L. To achieve compliance with Subpart B of 40 CFR 192 at the NC site, DOE is proposing the strategy of natural flushing in conjunction with institutional controls and continued monitoring. Ground water flow and transport modeling has predicted that concentrations of uranium and selenium in the alluvial aquifer will decrease to levels below their respective MCLs within 50 years.

  13. Economic impact study of the Uranium Mill Tailings Remedial Action Project in Colorado: Colorado state fiscal year 1994

    SciTech Connect (OSTI)

    Not Available

    1994-11-01

    The Colorado economic impact study summarizes employment and economic benefits to the state from activities associated with the Uranium Mill Tailings Remedial Action (UMTRA) Project during Colorado state fiscal year 1994. To capture employment information, a questionnaire was distributed to subcontractor employees at the active UMTRA Project sites of Grand Junction, Naturita, Gunnison, and Rifle, Colorado. Economic data were requested from each site prime subcontractor, as well as from the Remedial Action Contractor. The most significant benefits associated with the UMTRA Project in Colorado are summarized. This study assesses benefits associated with the Grand Junction, Gunnison, Naturita, and Rifle UMTRA Projects sites for the 1-year period under study. Work at the Naturita site was initiated in April 1994 and involved demolition of buildings at the processing site. Actual start-up of remediation of Naturita is planned to begin in the spring of 1995. Work at the Slick Rock and Maybell sites is expected to begin in 1995. The only current economic benefits associated with these sites are related to UMTRA Project support work.

  14. Environmental assessment of facility operations at the U.S. Department of Energy Grand Junction Projects Office, Grand Junction, Colorado

    SciTech Connect (OSTI)

    1996-06-01

    The US Department of Energy (DOE) has prepared a sitewide environmental assessment (EA) of the proposed action to continue and expand present-day activities on the DOE Grand Junction Projects Office (GJPO) facility in Grand Junction, Colorado. Because DOE-GJPO regularly proposes and conducts many different on-site activities, DOE decided to evaluate these activities in one sitewide EA rather than in multiple, activity-specific documents. On the basis of the information and analyses presented in the EA, DOE has determined that the proposed action does not constitute a major Federal action significantly affecting the quality of the human environment, as defined by the National Environmental Policy Act (NEPA) of 1969. Therefore, preparation of an environmental impact statement is not required for facility operations, and DOE is issuing this Finding of No Significant Impact (FONSI).

  15. EA-1458: Environmental Assessment

    Broader source: Energy.gov [DOE]

    Ground Water Compliance at the Slick Rock, Colorado, UMTRA Project Sites, DOE Grand Junction Office, Grand Junction, Colorado

  16. Uranium Mill Tailings Remedial Action Project 1993 Environmental Report

    SciTech Connect (OSTI)

    Not Available

    1994-10-01

    This annual report documents the Uranium Mill Tailing Remedial Action (UMTRA) Project environmental monitoring and protection program. The UMTRA Project routinely monitors radiation, radioactive residual materials, and hazardous constituents at associated former uranium tailings processing sites and disposal sites. At the end of 1993, surface remedial action was complete at 10 of the 24 designated UMTRA Project processing sites. In 1993 the UMTRA Project office revised the UMTRA Project Environmental Protection Implementation Plan, as required by the US DOE. Because the UMTRA Project sites are in different stages of remedial action, the breadth of the UMTRA environmental protection program differs from site to site. In general, sites actively undergoing surface remedial action have the most comprehensive environmental programs for sampling media. At sites where surface remedial action is complete and at sites where remedial action has not yet begun, the environmental program consists primarily of surface water and ground water monitoring to support site characterization, baseline risk assessments, or disposal site performance assessments.

  17. Economic impact study of the Uranium Mill Tailings Remedial Action Project in Colorado: Colorado State fiscal year 1994. Revision 1

    SciTech Connect (OSTI)

    Not Available

    1994-12-01

    The Colorado economic impact study summarizes employment and economic benefits to the state from activities associated with the Uranium Mill Tailings Remedial Action (UMTRA) Project during Colorado state fiscal year 1994 (1 July 1993 through 30 June 1994). To capture employment information, a questionnaire was distributed to subcontractor employees at the active UMTRA Project sites of Grand Junction, Naturita, Gunnison, and Rifle, Colorado. Economic data were requested from each site prime subcontractor, as well as from the Remedial Action Contractor. Information on wages, taxes, and subcontract expenditures in combination with estimates and economic multipliers is used to estimate the dollar economic benefits to Colorado during the state fiscal year. Finally, the fiscal year 1994 estimates are compared to fiscal year 1993 employment and economic information.

  18. Grand Junction Projects Office Remedial Action Project: Feasibility test of real-time radiation monitoring during removal of surface contamination from concrete floors

    SciTech Connect (OSTI)

    Leino, R.; Corle, S.

    1995-10-01

    This feasibility test was conducted to determine if real-time radiation-monitoring instruments could be mounted on decontamination machines during remediation activities to provide useful and immediate feedback to equipment operators. The U.S. Department of Energy (DOE) sponsored this field test under the Grand Junction Projects Office Remedial Action Project (GJPORAP) to identify a more efficient method to remove radiological contamination from concrete floor surfaces. This test demonstrated that project durations and costs may be reduced by combining radiation-monitoring equipment with decontamination machines. The test also demonstrated that a microprocessor-based instrument such as a radiation monitor can withstand the type of vibration that is characteristic of floor scabblers with no apparent damage. Combining radiation-monitoring equipment with a decontamination machine reduces the time and costs required to decontaminate concrete surfaces. These time and cost savings result from the reduction in the number of interim radiological surveys that must be conducted to complete remediation. Real-time radiation monitoring allows equipment operators to accurately monitor contamination during the decontamination process without support from radiological technicians, which also reduces the project duration and costs. The DOE Grand Junction Projects Office recommends more extensive and rigorous testing of this real-time radiation monitoring to include a variety of surfaces and decontamination machines. As opportunities arise, additional testing will be conducted under GJPORAP.

  19. Baseline risk assessment of ground water contamination at the Uranium Mill Tailings Site near Grand Junction, Colorado

    SciTech Connect (OSTI)

    Not Available

    1994-06-01

    This Baseline Risk Assessment of Ground Water Contamination at the Uranium Mill Tailings Site Near Grand Junction, Colorado evaluates potential impacts to public health or the environment resulting from ground water contamination at the former uranium mill processing site. The tailings and other contaminated material at this site were placed in an off-site disposal cell by the US Department of Energy`s (DOE) Uranium Mill Tailings Remedial Action (UMTRA) Project. The remedial activities at the site were conducted from 1989 to 1993. Currently, the UMTRA Project is evaluating ground water contamination. This risk assessment is the first document specific to this site for the Ground Water Project. This risk assessment evaluates the most contaminated ground water that flows beneath the processing site toward the Colorado River. The monitor wells that have consistently shown the highest concentrations of most contaminants are used to assess risk. This risk assessment will be used in conjunction with additional activities and documents to determine what remedial action may be needed for contaminated ground water at the site. This risk assessment follows an approach outlined by the EPA. the first step is to evaluate ground water data collected from monitor wells at the site. Evaluation of these data showed that the contaminants of potential concern in the ground water are arsenic, cadmium, cobalt, fluoride, iron, manganese, molybdenum, nickel, sulfate, uranium, vanadium, zinc, and radium-226. The next step in the risk assessment is to estimate how much of these contaminants people would be exposed to if they drank from a well installed in the contaminated ground water at the former processing site.

  20. Grand Junction Office Founder Honored at the Philip C. Leahy...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Junction, Colorado, Office to commemorate its place in the Manhattan Project and Cold War histories. The park, located in the middle of the Grand Junction Office campus, was...

  1. Nanotube junctions

    DOE Patents [OSTI]

    Crespi, Vincent Henry; Cohen, Marvin Lou; Louie, Steven Gwon; Zettl, Alexander Karlwalte

    2004-12-28

    The present invention comprises a new nanoscale metal-semiconductor, semiconductor-semiconductor, or metal-metal junction, designed by introducing topological or chemical defects in the atomic structure of the nanotube. Nanotubes comprising adjacent sections having differing electrical properties are described. These nanotubes can be constructed from combinations of carbon, boron, nitrogen and other elements. The nanotube can be designed having different indices on either side of a junction point in a continuous tube so that the electrical properties on either side of the junction vary in a useful fashion. For example, the inventive nanotube may be electrically conducting on one side of a junction and semiconducting on the other side. An example of a semiconductor-metal junction is a Schottky barrier. Alternatively, the nanotube may exhibit different semiconductor properties on either side of the junction. Nanotubes containing heterojunctions, Schottky barriers, and metal-metal junctions are useful for microcircuitry.

  2. Nanotube junctions

    DOE Patents [OSTI]

    Crespi, Vincent Henry (Darien, IL); Cohen, Marvin Lou (Berkeley, CA); Louie, Steven Gwon Sheng (Berkeley, CA); Zettl, Alexander Karlwalter (Kensington, CA)

    2003-01-01

    The present invention comprises a new nanoscale metal-semiconductor, semiconductor-semiconductor, or metal-metal junction, designed by introducing topological or chemical defects in the atomic structure of the nanotube. Nanotubes comprising adjacent sections having differing electrical properties are described. These nanotubes can be constructed from combinations of carbon, boron, nitrogen and other elements. The nanotube can be designed having different indices on either side of a junction point in a continuous tube so that the electrical properties on either side of the junction vary in a useful fashion. For example, the inventive nanotube may be electrically conducting on one side of a junction and semiconducting on the other side. An example of a semiconductor-metal junction is a Schottky barrier. Alternatively, the nanotube may exhibit different semiconductor properties on either side of the junction. Nanotubes containing heterojunctions, Schottky barriers, and metal-metal junctions are useful for microcircuitry.

  3. Josephson junction

    DOE Patents [OSTI]

    Wendt, J.R.; Plut, T.A.; Martens, J.S.

    1995-05-02

    A novel method for fabricating nanometer geometry electronic devices is described. Such Josephson junctions can be accurately and reproducibly manufactured employing photolithographic and direct write electron beam lithography techniques in combination with aqueous etchants. In particular, a method is described for manufacturing planar Josephson junctions from high temperature superconducting material. 10 figs.

  4. Josephson junction

    DOE Patents [OSTI]

    Wendt, Joel R. (Albuquerque, NM); Plut, Thomas A. (Albuquerque, NM); Martens, Jon S. (Sunnyvale, CA)

    1995-01-01

    A novel method for fabricating nanometer geometry electronic devices is described. Such Josephson junctions can be accurately and reproducibly manufactured employing photolithographic and direct write electron beam lithography techniques in combination with aqueous etchants. In particular, a method is described for manufacturing planar Josephson junctions from high temperature superconducting material.

  5. Moab Uranium Mill Tailings Cleanup Project Steps into Spotlight at International Meeting in Vienna

    Broader source: Energy.gov [DOE]

    VIENNA – The Moab Uranium Mill Tailings Remedial Action (UMTRA) Project has kept the United States at the forefront of characterization, remediation, and end-state reuse of uranium millsites around the world.

  6. Applications of permeable barrier technology to ground water contamination at the Shiprock, NM, UMTRA site

    SciTech Connect (OSTI)

    Thomson, B.M.; Henry, E.J.; Thombre, M.S.

    1996-12-31

    The Shiprock uranium mill tailings pile in far northwestern New Mexico consists of approximately 1.5 million tons of uranium mill tailings from an acid leach mill which operated from 1954 to 1968. Located on land owned by the Navajo Nation, it was one of the first tailings piles stabilized under the Uranium Mill Tailings Remedial Action (UMTRA) project. Stabilization activities were completed in 1986 and consisted principally of consolidating the tailings, contouring the pile to achieve good drainage, and covering the pile with a multi-layer cap to control infiltration of water, radon emanation, and surface erosion. No ground water protection or remediation measures were implemented other than limiting infiltration of water through the pile, although a significant ground water contamination plume exists in the flood plain adjacent to the San Juan River. The major contaminants at the Shiprock site include high concentrations of sulfate, nitrate, arsenic, and uranium. One alternative for remediation may be the use of a permeable barrier in the flood plain aquifer. As proposed for the Shiprock site, the permeable barrier would be a trench constructed in the flood plain that would be backfilled with a media that is permeable to ground water, but would intercept or degrade the pollutants. Work to date has focused on use of a mixed microbial population of sulfate and nitrate reducing organisms. These organisms would produce strongly reducing conditions which would result in precipitation of the metal contaminants (i.e., Se(IV) and U(IV)) in the barrier. One of the first considerations in designing a permeable barrier is developing an understanding of ground water flow at the site. Accordingly, a steady state numerical model of the ground water flow at the site was developed using the MODFLOW code.

  7. Microsoft Word - U0127400.doc

    Office of Legacy Management (LM)

    12-TAR MAC-GWMON 1.8 Chemistry of Phase I Phytoremediation Soils: Work Plan for the Monument Valley, Arizona, UMTRA Project Site September 2001 This page intentionally left blank UMTRA Ground Water Project Chemistry of Phase I Phytoremediation Soils: Work Plan for the Monument Valley, Arizona, UMTRA Project Site September 2001 Prepared for U.S. Department of Energy Grand Junction Office Grand Junction, Colorado Project Number UGW-511-0015-37-000 Document Number U0127400 Work Performed Under DOE

  8. u0052100_Beav.PDF

    Office of Legacy Management (LM)

    312 Rev. 0 Environmental Assessment of Ground Water Compliance at the Grand Junction UMTRA Project Site (Climax Uranium Millsite) Final September 1999 Prepared by U.S. Department of Energy Grand Junction Office Grand Junction, Colorado Work Performed Under DOE Contract No. DE-AC13-96GJ87335 for the U.S. Department of Energy EA of Ground Water Compliance at the Grand Junction UMTRA Project Site DOE Grand Junction Office Page ii Final September 1999 Contents Executive

  9. F:\SHARE\SE\Web_Origs\Wrk_Jan\mvsowp\MONPIP.PDF

    Office of Legacy Management (LM)

    7.1 UMTRA Ground Water Project Public Involvement Plan for the Environmental Assessment of Ground Water Compliance at the Monument Valley, Arizona, Uranium Mill Tailings Site July 1999 Prepared by U.S. Department of Energy Grand Junction Office Grand Junction, Colorado Work performed under DOE Contract No. DE-AC13-96GJ87335 Public Involvement Plan for the Monument Valley UMTRA Site Page 2 Introduction This Public Involvement Plan is tiered to the Uranium Mill Tailings Remedial Action (UMTRA)

  10. Grand Junction Office Founder Honored at the

    Office of Environmental Management (EM)

    4 Grand Junction Office Founder Honored at the Philip C. Leahy Memorial Park Dedication and Open House The U.S. Department of Energy (DOE) Offce of Legacy Management (LM) held an open house and park dedication at the Grand Junction, Colorado, Offce to commemorate its place in the Manhattan Project and Cold War histories. The park, located in the middle of the Grand Junction Offce campus, was dedicated to Army Major (retired) Philip C. Leahy. Leahy came to Grand Junction in 1943 under secret

  11. Uranium Mill Tailings Remedial Action Project. 1995 Environmental Report

    SciTech Connect (OSTI)

    1996-06-01

    In accordance with U.S. Department of Energy (DOE) Order 23 1. 1, Environment, Safety and Health Reporting, the DOE prepares an annual report to document the activities of the Uranium Mill Tailings Remedial Action (UMTRA) Project environmental monitoring program. This monitoring must comply with appropriate laws, regulations, and standards, and it must identify apparent and meaningful trends in monitoring results. The results of all monitoring activities must be communicated to the public. The UMTRA Project has prepared annual environmental reports to the public since 1989.

  12. Solar Junction | Open Energy Information

    Open Energy Info (EERE)

    Junction Jump to: navigation, search Name: Solar Junction Place: San Jose, California Zip: CA 95131 Sector: Efficiency, Solar Product: Solar Junction is developing high efficiency...

  13. Microsoft Word - U01866.doc

    Office of Legacy Management (LM)

    186600 GJO-2003-489-TAC GJO-GWDUR 2.0 UMTRA Ground Water Project Verification Monitoring Report for the Durango, Colorado, UMTRA Project Site September 2003 Prepared by U.S. Department of Energy Grand Junction Office Grand Junction, Colorado Work Performed Under DOE Contract No. DE-AC13-02GJ79491 Document Number U0186600 Contents DOE/Grand Junction Office Verification Monitoring Report-Durango, Colorado September 2003 Page iii Contents 1.0

  14. Microsoft Word - U01804.doc

    Office of Legacy Management (LM)

    0400 GJO-2003-422-TAC GJO-GWTUB 30.13.2-2 UMTRA Ground Water Project Tuba City UMTRA Project Site Semi-Annual Performance Evaluation through August 2002 May 2003 Prepared by U.S. Department of Energy Grand Junction Office Grand Junction, Colorado Work Performed Under DOE Contract No. DE-AC13-02GJ79491 This page intentionally left blank Document Number U0180400 Contents DOE/Grand Junction Office Tuba City UMTRA Project Site Semi-Annual Performance Evaluation May 2003 Page iii Contents 1.0

  15. Microsoft Word - U0184800-September 2003.doc

    Office of Legacy Management (LM)

    4800 GJO-2003-483-TAC GJO-GWTUB 30.13.2 UMTRA Ground Water Project Tuba City, Arizona, UMTRA Project Site Semi-Annual Performance Evaluation September 2002 through February 2003 September 2003 Prepared by U.S. Department of Energy Grand Junction Office Grand Junction, Colorado Work Performed Under DOE Contract No. DE-AC13-02GJ79491 This page intentionally left blank Document Number U0184800 Contents DOE/Grand Junction Office Tuba City UMTRA Project Site Semi-Annual Performance Evaluation

  16. EA-1406: Ground Water Compliance at the New Rifle, Colorado, UMTRA Project Site, Rifle, Colorado

    Broader source: Energy.gov [DOE]

    This EA evaluates the environmental impacts for the proposed compliance strategy of natural flushing combined with institutional controls and continued monitoring for the New Rifle uranium mill...

  17. Guidance for implementing the long-term surveillance program for UMTRA Project Title I Disposal Sites

    SciTech Connect (OSTI)

    1996-02-01

    This guidance document has two purposes: it provides guidance for writing site-specific long-term surveillance plans (LTSP) and it describes site surveillance, monitoring, and long-term care techniques for Title I disposal sites of the Uranium Mill Tailings Radiation Control Act (UMTRCA) (42 USC Section 7901 et seq.). Long-term care includes monitoring, maintenance, and emergency measures needed to protect public health and safety and the environment after remedial action is completed. This document applies to the UMTRCA-designated Title I disposal sites. The requirements for long-term care of the Title I sites and the contents of the LTSPs are provided in U.S. Nuclear Regulatory Commission (NRC) regulations (10 CFR Section 40.27) provided in Attachment 1.

  18. Engineering feasibility analysis for in-situ stabilization of Canonsburg residues. [UMTRA project

    SciTech Connect (OSTI)

    Not Available

    1982-01-01

    The US Department of Energy is considering several methods for carrying out remedial actions in Canonsburg, Pennsylvania, at the site of an inactive uranium-processing mill. The main objective of this study is to determine the feasibility of in-situ stabilization as the remedial action. In-situ stabilization is an alternative to site decontamination and offsite disposal. The problems associated with offsite hauling of large quantities of contaminated material and with the location and development of a new disposal site could be avoided by the implementation of an in-situ stabilization concept. In addition, the in-situ approach would be more cost-effective than offsite disposal. This study will establish that a technically feasible and implementable in-situ stabilization concept can be developed that meets regulatory requirements and is cost effective. This study in no way commits the DOE to implement any specific actions described herein. 11 refs., 30 figs., 24 tabs.

  19. CLEANING UP MILL TAILINGS AND GROUND WATER AT THE MOAB UMTRA PROJECT SITE

    Broader source: Energy.gov [DOE]

    Moab, UT - Sixteen million tons of uranium mill tailings 80 feet high stood on the banks of the Colorado River near Moab in southeast Utah, as a legacy to the former ore-processing site that operated for nearly three decades beginning in the mid-1950s.

  20. U01024.PDF

    Office of Legacy Management (LM)

    GJO-2001-214-TAR MAC-GWGUN 1.1 Final Site Observational Work Plan for the Gunnison, Colorado, UMTRA Project Site March 2001 GJO-2001-214-TAR MAC-GWGUN 1.1 UMTRA Ground Water Project Final Site Observational Work Plan for the Gunnison, Colorado, UMTRA Project Site March 2001 Prepared by U.S. Department of Energy Grand Junction Office Grand Junction, Colorado Project Number UGW-511-0010-02-000 Document Number U01024 Work Performed Under DOE Contract No. DE-AC13-96GJ87335 Document Number U01024

  1. Three-junction solar cell

    DOE Patents [OSTI]

    Ludowise, Michael J. (Cupertino, CA)

    1986-01-01

    A photovoltaic solar cell is formed in a monolithic semiconductor. The cell contains three junctions. In sequence from the light-entering face, the junctions have a high, a medium, and a low energy gap. The lower junctions are connected in series by one or more metallic members connecting the top of the lower junction through apertures to the bottom of the middle junction. The upper junction is connected in voltage opposition to the lower and middle junctions by second metallic electrodes deposited in holes 60 through the upper junction. The second electrodes are connected to an external terminal.

  2. EA-1312: Final Environmental Assessment | Department of Energy

    Office of Environmental Management (EM)

    2: Final Environmental Assessment EA-1312: Final Environmental Assessment Ground Water Compliance at the Grand Junction UMTRA Project Site (Climax Uranium Millsite) This document is the Environmental Assessment (EA) for the proposed action to address ground water contamination at the Uranium Mill Tailings Remedial Action (UMTRA) Project site in Grand Junction, Colorado. This site is also known as the former Climax uranium millsite. The purpose of this EA is to present the proposed action and

  3. EA-1037: Uranium Lease Management Program, Grand Junction, Colorado

    Broader source: Energy.gov [DOE]

    This EA evaluates the environmental impacts of the U.S. Department of Energy's Grand Junction Projects Office's proposal to maintain and preserve the nation's immediately accessible supply of...

  4. Project Management Plan

    SciTech Connect (OSTI)

    Not Available

    1988-01-01

    The mission of the Uranium Mill Tailings Remedial Action (UMTRA) Project is explicitly stated and directed in the Uranium Mill Tailings Radiation Control Act of 1978, Public Law 95-604, 42 USC 7901 (hereinafter referred to as the Act''). Title I of the Act authorizes the Department of Energy (DOE) to undertake remedial actions at 24 designated inactive uranium processing sites and associated vicinity properties containing uranium mill tailings and other residual radioactive materials derived from the processing sites. The Act, amended in January 1983, by Public Law 97-415, also authorizes DOE to perform remedial actions at vicinity properties in Edgemont, South Dakota. Cleanup of the Edgemont processing site is the responsibility of the Tennessee Valley Authority. This document describes the plan, organization, system, and methodologies used to manage the design, construction, and other activities required to clean up the designated sites and associated vicinity properties in accordance with the Act. The plan describes the objectives of the UMTRA Project, defines participants' roles and responsibilities, outlines the technical approach for accomplishing the objectives, and describes the planning and managerial controls to be used in integrating and performing the Project mission. 21 figs., 21 tabs.

  5. DOE - Office of Legacy Management -- Grand Junction Sites

    Office of Legacy Management (LM)

    Grand Junction Sites Grand Junction Sites gj_map Grand Junction Disposal Site Grand Junction Processing Site Grand Junction Site Contact Us

  6. shippip.PDF

    Office of Legacy Management (LM)

    6-TAR MAC-GWSHP 7.1 Public Involvement Plan for the Environmental Assessment of Ground Water Compliance at the Shiprock, New Mexico, Uranium Mill Tailings Remedial Action (UMTRA) Project Site February 2001 Prepared by U.S. Department of Energy Grand Junction Office Grand Junction, Colorado Work performed under DOE Contract No. DE-AC13-96GJ8733 Public Involvement Plan for the Shiprock UMTRA Site Page ii Contents Regulatory

  7. Microsoft Word - cover.doc

    Office of Legacy Management (LM)

    1999-90-TAR MAC-GWGRJ 1.9 Ground Water Compliance Action Plan for the Grand Junction, Colorado, UMTRA Project Site May 2001 GJO-1999-90-TAR MAC-GWGRJ 1.9 Ground Water Compliance Action Plan for the Grand Junction, Colorado, UMTRA Project Site May 2001 Prepared by U.S. Department of Energy Grand Junction Office Grand Junction, Colorado Project Number UGW-511-0008-09-000 Document Number U0050100 Work Performed under DOE Contract No. DE-AC13-96GJ87335 Document Number U0050100 Contents DOE/Grand

  8. Microsoft Word - contents

    Office of Legacy Management (LM)

    GJO-2001-272-TAR MAC-GWDUR 1.1 UMTRA Ground Water Project Site Observational Work Plan for the Durango, Colorado, UMTRA Project Site January 2002 Prepared by U.S. Department of Energy Grand Junction Office Grand Junction, Colorado Project Number UGW 511-0006-10-000 Document Number U0143200 Work Performed Under DOE Contract Number DE-AC13-96GJ87335 This page intentionally left blank Document Number U0143200 Contents DOE/Grand Junction Office Site Observational Work Plan -Durango, Colorado January

  9. GaInNAs Junctions for Next-Generation Concentrators: Progress and Prospects

    SciTech Connect (OSTI)

    Friedman, D. J.; Ptak, A. J.; Kurtz, S. R.; Geisz, J. F.; Kiehl, J.

    2005-08-01

    We discuss progress in the development of GaInNAs junctions for application in next-generation multijunction concentrator cells. A significant development is the demonstration of near-100% internal quantum efficiencies in junctions grown by molecular-beam epitaxy. Testing at high currents validates the compatibility of these devices with concentrator operation. The efficiencies of several next-generation multijunction structures incorporating these state-of-the-art GaInNAs junctions are projected.

  10. Finding

    Office of Legacy Management (LM)

    Finding of No Significant Impact Ground Water Compliance at the Grand Junction UMTRA Project Site (Climax Uranium Millsite) September 1999 U.S. Department of Energy Grand Junction Office Grand Junction, Colorado Finding of No Significant Impact Environmental Assessment The U.S. Department of Energy (DOE) proposes a strategy to achieve ground water compliance at the Grand Junction, Colorado, LJMTRA project site, formerly known as the Climax Uranium Millsite. The proposed compliance strategy is no

  11. U0083900.doc

    Office of Legacy Management (LM)

    GJO-2002-304-TAR MAC-GWTUB 11.11.2 Plan for Injection of Treated Ground Water at the Tuba City, Arizona, UMTRA Project Site March 2002 Prepared by U. S. Department of Energy Grand Junction Office Grand Junction, Colorado Project Number UGW-511-0023-17-000 Document Number U0083900 Work Performed Under DOE Contract No. DE-AC13-96GJ87335 Document Number U0083900 DOE/Grand Junction Office Plan for Injection of Treated Ground Water at the Tuba City UMTRA Site March 2002 Page 1 Introduction This plan

  12. Microsoft Word - U01860_Feb to Aug 03.doc

    Office of Legacy Management (LM)

    0 GJO-2003-490-TAC GJO-GWSHP 13.2 UMTRA Ground Water Project Semiannual Performance Report February 2003 through August 2003 for the Shiprock, New Mexico, UMTRA Project Site September 2003 Prepared by U.S. Department of Energy Grand Junction Office Grand Junction, Colorado Work Performed Under DOE Contract Number DE-AC13-02GJ79491 This page intentionally left blank Document Number U0186000 Contents DOE/Grand Junction Office Semi-Annual Performance Report, Shiprock, New Mexico September 2003 Page

  13. 1

    Office of Legacy Management (LM)

    300 GJO-2003-431-TAC GJO-GWSHP 13.2-1 UMTRA Ground Water Project Baseline Performance Report for the Shiprock, New Mexico, UMTRA Project Site September 2003 Prepared by U.S. Department of Energy Grand Junction Office Grand Junction, Colorado Work Performed Under DOE Contract Number DE-AC13-02GJ79491 This page intentionally left blank Document Number U0179300 Contents DOE/Grand Junction Office Baseline Performance Report, Shiprock, New Mexico September 2003 Page iii Contents 1.0 Introduction

  14. Junction Hilltop Wind | Open Energy Information

    Open Energy Info (EERE)

    navigation, search Name Junction Hilltop Wind Facility Junction Hilltop Wind Sector Wind energy Facility Type Community Wind Facility Status In Service Owner Community Owned...

  15. gjpip.PDF

    Office of Legacy Management (LM)

    GWGRJ 7.1 Public Involvement Plan for the Environmental Assessment of Ground Water Compliance at the Grand Junction Uranium Mill Tailings Remedial Action (UMTRA) Project Site (Climax Uranium Millsite) July 1999 Prepared by U.S. Department of Energy Grand Junction Office Grand Junction, Colorado Work performed under DOE Contract No. DE-AC13-96GJ8733 Public Involvement Plan July 1999 Page 1 Public Involvement Plan for the Environmental Assessment of Ground Water Compliance at the Grand Junction,

  16. Josephson junction Q-spoiler

    DOE Patents [OSTI]

    Clarke, J.; Hilbert, C.; Hahn, E.L.; Sleator, T.

    1986-03-25

    An automatic Q-spoiler comprising at least one Josephson tunnel junction connected in an LC circuit for flow of resonant current therethrough. When in use in a system for detecting the magnetic resonance of a gyromagnetic particle system, a high energy pulse of high frequency energy irradiating the particle system will cause the critical current through the Josephson tunnel junctions to be exceeded, causing the tunnel junctions to act as resistors and thereby damp the ringing of the high-Q detection circuit after the pulse. When the current has damped to below the critical current, the Josephson tunnel junctions revert to their zero-resistance state, restoring the Q of the detection circuit and enabling the low energy magnetic resonance signals to be detected.

  17. Josephson junction Q-spoiler

    DOE Patents [OSTI]

    Clarke, John (Berkeley, CA); Hilbert, Claude (Austin, TX); Hahn, Erwin L. (Berkeley, CA); Sleator, Tycho (Berkeley, CA)

    1988-01-01

    An automatic Q-spoiler comprising at least one Josephson tunnel junction connected in an LC circuit for flow of resonant current therethrough. When in use in a system for detecting the magnetic resonance of a gyromagnetic particle system, a high energy pulse of high frequency energy irradiating the particle system will cause the critical current through the Josephson tunnel junctions to be exceeded, causing the tunnel junctions to act as resistors and thereby damp the ringing of the high-Q detection circuit after the pulse. When the current has damped to below the critical current, the Josephson tunnel junctions revert to their zero-resistance state, restoring the Q of the detection circuit and enabling the low energy magnetic resonance signals to be detected.

  18. Microsoft Word - U0186500.doc

    Office of Legacy Management (LM)

    500 GJO-2003-487-TAC GJO-GWSHP 11.7 UMTRA Ground Water Project Wildlife Management Plan for the Evaporation Pond at the Shiprock, New Mexico, UMTRA Site September 2003 Prepared by U.S. Department of Energy Grand Junction Office Grand Junction, Colorado Work Performed Under DOE Contract Number DE-AC-13-02GJ79491 Document Number U0186500 DOE/Grand Junction Office Wildlife Management PlanShiprock Evaporation Pond September 2003 Page 1 1.0 Introduction The Proposed Action in the Environmental

  19. Economic impact study of the Uranium Mill Tailings Remedial Action project in Colorado: Colorado state fiscal year 1995. Revision 1

    SciTech Connect (OSTI)

    1995-12-01

    As required by the Romer-Twining Agreement of 1990, the US Department of Energy (DOE) has prepared this annual economic impact study for the state of Colorado. This report assesses the economic impacts related to the DOE Uranium Mill Tailings Remedial Action (UMTRA) Project in Colorado during the state fiscal year (FY) between 1 July 1994 and 30 June 1995. To estimate net economic benefit, employment, salaries and wages, and other related economic benefits are discussed, quantified, and then compared to the state`s 10 percent share of the remedial action costs. Actual data obtained from sites currently undergoing remedial action were used as the basis for analyses. If data were not available, estimates were used to derive economic indicators. This study describes the types of employment associated with the UMTRA Project and estimates of the numbers of people employed by UMTRA Project subcontractors in Colorado during state FY 1995. Employment totals are reported in estimated average annual jobs; however, the actual number of workers at the site fluctuates depending on weather and on the status of remedial action activities. In addition, the actual number of people employed on the Project during the year may be higher than the average annual employment reported due to the temporary nature of some of the jobs.

  20. Projecting

    U.S. Energy Information Administration (EIA) Indexed Site

    Projecting the scale of the pipeline network for CO2-EOR and its implications for CCS ... for CO 2 -EOR and CO 2 transportation for CCS assuming a carbon price are discussed. ...

  1. Microsoft Word - New Rifle EA.doc

    Office of Legacy Management (LM)

    DOE/EA-1406 Final Environmental Assessment of Ground Water Compliance at the New Rifle, Colorado, UMTRA Project Site July 2003 Work Performed Under DOE Contract No. DE-AC13-02GJ79491 for the U.S. Department of Energy Approved for public release; distribution is unlimited. U01341 DOE/EA-1406 Rev. 0 Final Environmental Assessment of Ground Water Compliance at the New Rifle, Colorado, UMTRA Project Site July 2003 Prepared by U.S. Department of Energy Grand Junction Office Grand Junction, Colorado

  2. Grand Junction, Colorado, Site Fact Sheet

    Office of Legacy Management (LM)

    D D&D Page 1 of 3 Fact Sheet Grand Junction, Colorado, Site This fact sheet provides information about the Grand Junction, Colorado, Site. This site is managed by the U.S. Department of Energy Office of Legacy Management under the Defense Decontamination and Decommissioning (D&D) Program. Location of the Grand Junction, Colorado, Site Site Description and History The Grand Junction site is located in the city of Grand Junction, in west-central Colorado about 26 miles from the Utah

  3. Guneafinal-for laser printer.doc

    Office of Legacy Management (LM)

    11900 DOE/EA-1399 Environmental Assessment of Ground Water Compliance at the Gunnison, Colorado, UMTRA Project Site Final July 2002 Prepared by U.S. Department of Energy Grand Junction Office Grand Junction, Colorado Work performed Under DOE Contract No. DE-AC13-96GJ87355 DOE Grand Junction Office EA of Ground Water Compliance at the Gunnison Site July 2002 Final Page iii Contents Page Acronyms and Abbreviations

  4. Microsoft Word - U0163300.doc

    Office of Legacy Management (LM)

    EA-1458 Environmental Assessment of Ground Water Compliance at the Slick Rock, Colorado, UMTRA Project Sites Final February 2003 Prepared by U.S. Department of Energy Grand Junction Office Grand Junction, Colorado Work Performed Under DOE Contract No. DE-AC13-02GJ79491 This page intentionally left blank DOE Grand Junction Office EA of Ground Water Compliance at the Slick Rock Sites February 2003 Final Page iii Contents Page Acronyms and Abbreviations

  5. Microsoft Word - U0179700.doc

    Office of Legacy Management (LM)

    700 DOE/EA-1466 Environmental Assessment of Ground Water Compliance at the Naturita, Colorado, UMTRA Project Site April 2003 Prepared by U.S. Department of Energy Grand Junction Office Grand Junction, Colorado Work Performed Under DOE Contract No. DE-AC13-02GJ79491 This page intentionally left blank DOE Grand Junction Office EA of Ground Water Compliance at the Naturita Site April 2003 Page iii Contents Page Acronyms and Abbreviations

  6. Public Involvment Plan - Rifle, Colorado

    Office of Legacy Management (LM)

    4-TAR MAC-GWRIF 7.1 UMTRA Ground Water Project Public Involvement Plan for the Environmental Assessment of Ground Water Compliance at the New and Old Rifle, Colorado, Uranium Mill Tailings Sites May 1999 Prepared by U.S. Department of Energy Grand Junction Office Grand Junction, Colorado Work performed under DOE Contract No. DE-AC13-96GJ87335 Public Involvement Plan for the Rifle UMTRA Sites Page 2 Introduction This Public Involvement Plan is tiered to the Uranium Mill Tailings Remedial Action

  7. Uranium Mill Tailings Remedial Action Project Safety Advancement Field Effort (SAFE) Program

    SciTech Connect (OSTI)

    Not Available

    1994-02-01

    In 1992, the Uranium Mill Tailings Remedial Action (UMTRA) Project experienced several health and safety related incidents at active remediation project sites. As a result, the U.S. Department of Energy (DOE) directed the Technical Assistance Contractor (TAC) to establish a program increasing the DOE`s overall presence at operational remediation sites to identify and minimize risks in operations to the fullest extent possible (Attachments A and B). In response, the TAC, in cooperation with the DOE and the Remedial Action Contractor (RAC), developed the Safety Advancement Field Effort (SAFE) Program.

  8. Method for shallow junction formation

    DOE Patents [OSTI]

    Weiner, K.H.

    1996-10-29

    A doping sequence is disclosed that reduces the cost and complexity of forming source/drain regions in complementary metal oxide silicon (CMOS) integrated circuit technologies. The process combines the use of patterned excimer laser annealing, dopant-saturated spin-on glass, silicide contact structures and interference effects creates by thin dielectric layers to produce source and drain junctions that are ultrashallow in depth but exhibit low sheet and contact resistance. The process utilizes no photolithography and can be achieved without the use of expensive vacuum equipment. The process margins are wide, and yield loss due to contact of the ultrashallow dopants is eliminated. 8 figs.

  9. Method for shallow junction formation

    DOE Patents [OSTI]

    Weiner, Kurt H. (San Jose, CA)

    1996-01-01

    A doping sequence that reduces the cost and complexity of forming source/drain regions in complementary metal oxide silicon (CMOS) integrated circuit technologies. The process combines the use of patterned excimer laser annealing, dopant-saturated spin-on glass, silicide contact structures and interference effects creates by thin dielectric layers to produce source and drain junctions that are ultrashallow in depth but exhibit low sheet and contact resistance. The process utilizes no photolithography and can be achieved without the use of expensive vacuum equipment. The process margins are wide, and yield loss due to contact of the ultrashallow dopants is eliminated.

  10. New Insights for Improving the Designs of Flexible Duct Junction Boxes (Fact Sheet), Building America Case Study: Technology Solutions for New and Existing Homes, Building Technologies Office (BTO)

    Energy Savers [EERE]

    New Insights for Improving the Designs of Flexible Duct Junction Boxes PROJECT INFORMATION IBACOS www.ibacos.com Construction: Fiberglass duct board or sheet metal junction boxes Type: Flexible duct constant-volume HVAC systems Builders: Those using ACCA Manual D process for sizing duct runs Size: N/A Price Range: N/A Date completed: N/A Climate Zone: All PERFORMANCE DATA Pressure losses are high for flexible duct junction boxes relative to other standard duct fittings; however, contractors

  11. Mon Valley work plan

    Office of Legacy Management (LM)

    GWSHP 1.8 U.S. Department of Energy UMTRA Ground Water Project Work Plan for Characterization Activities at the Shiprock UMTRA Project Site June 1998 Prepared by U.S. Department of Energy Albuquerque Operations Office Grand Junction Office Project Number UGW-511-0020-01-000 Document Number U0013400 Work Performed under DOE Contract No. DE-AC13-96GJ87335 Note: Some of the section page numbers in the Table of Contents may not correspond to the page on which the section appears when viewing them in

  12. GJO-2001-208-TAR

    Office of Legacy Management (LM)

    GJO-2001-208-TAR MAC-GWSHP 11.7-1 UMTRA Ground Water Project Biological Assessment for Ground Water Remediation at the Shiprock Site Final April 2001 Prepared by U.S. Department of Energy Grand Junction Office Grand Junction, Colorado Project Number UGW-511-0020-26-000 Document Number U0118600 Work Performed Under DOE Contract Number DE-AC13-966587335 This Page Intentionally Blank Contents Page . Introduction

  13. EERE Success Story-Solar Junction Develops World Record Setting...

    Energy Savers [EERE]

    Junction Develops World Record Setting Concentrated Photovoltaic Solar Cell EERE Success Story-Solar Junction Develops World Record Setting Concentrated Photovoltaic Solar Cell ...

  14. Solar Junction Develops World Record Setting Concentrated Photovoltaic...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Junction Develops World Record Setting Concentrated Photovoltaic Solar Cell Solar Junction Develops World Record Setting Concentrated Photovoltaic Solar Cell April 18, 2013 - ...

  15. Phonon Bottleneck in Graphene-Based Josephson Junctions at Millikelvin...

    Office of Scientific and Technical Information (OSTI)

    Phonon Bottleneck in Graphene-Based Josephson Junctions at Millikelvin Temperatures Title: Phonon Bottleneck in Graphene-Based Josephson Junctions at Millikelvin Temperatures ...

  16. Performance model assessment for multi-junction concentrating photovoltaic systems.

    SciTech Connect (OSTI)

    Stein, Joshua S.; Riley, Daniel M.; McConnell, Robert.; Sahm, Aaron; Crawford, Clark; King, David L.; Cameron, Christopher P.; Foresi, James S.

    2010-03-01

    Four approaches to modeling multi-junction concentrating photovoltaic system performance are assessed by comparing modeled performance to measured performance. Measured weather, irradiance, and system performance data were collected on two systems over a one month period. Residual analysis is used to assess the models and to identify opportunities for model improvement. Large photovoltaic systems are typically developed as projects which supply electricity to a utility and are owned by independent power producers. Obtaining financing at favorable rates and attracting investors requires confidence in the projected energy yield from the plant. In this paper, various performance models for projecting annual energy yield from Concentrating Photovoltaic (CPV) systems are assessed by comparing measured system output to model predictions based on measured weather and irradiance data. The results are statistically analyzed to identify systematic error sources.

  17. Silicon fiber with p-n junction

    SciTech Connect (OSTI)

    Homa, D.; Cito, A.; Pickrell, G.; Hill, C.; Scott, B.

    2014-09-22

    In this study, we fabricated a p-n junction in a fiber with a phosphorous doped silicon core and fused silica cladding. The fibers were fabricated via a hybrid process of the core-suction and melt-draw techniques and maintained overall diameters ranging from 200 to 900??m and core diameters of 20800??m. The p-n junction was formed by doping the fiber with boron and confirmed via the current-voltage characteristic. The demonstration of a p-n junction in a melt-drawn silicon core fiber paves the way for the seamless integration of optical and electronic devices in fibers.

  18. Tunnel junction multiple wavelength light-emitting diodes

    DOE Patents [OSTI]

    Olson, Jerry M. (Lakewood, CO); Kurtz, Sarah R. (Golden, CO)

    1992-01-01

    A multiple wavelength LED having a monolithic cascade cell structure comprising at least two p-n junctions, wherein each of said at least two p-n junctions have substantially different band gaps, and electrical connector means by which said at least two p-n junctions may be collectively energized; and wherein said diode comprises a tunnel junction or interconnect.

  19. Tunnel junction multiple wavelength light-emitting diodes

    DOE Patents [OSTI]

    Olson, J.M.; Kurtz, S.R.

    1992-11-24

    A multiple wavelength LED having a monolithic cascade cell structure comprising at least two p-n junctions, wherein each of said at least two p-n junctions have substantially different band gaps, and electrical connector means by which said at least two p-n junctions may be collectively energized; and wherein said diode comprises a tunnel junction or interconnect. 5 figs.

  20. Semiconductor tunnel junction with enhancement layer

    DOE Patents [OSTI]

    Klem, J.F.; Zolper, J.C.

    1997-10-21

    The incorporation of a pseudomorphic GaAsSb layer in a runnel diode structure affords a new degree of freedom in designing runnel junctions for p-n junction device interconnects. Previously only doping levels could be varied to control the tunneling properties. This invention uses the valence band alignment band of the GaAsSb with respect to the surrounding materials to greatly relax the doping requirements for tunneling. 5 figs.

  1. Semiconductor tunnel junction with enhancement layer

    DOE Patents [OSTI]

    Klem, John F. (Sandia Park, NM); Zolper, John C. (Albuquerque, NM)

    1997-01-01

    The incorporation of a pseudomorphic GaAsSb layer in a runnel diode structure affords a new degree of freedom in designing runnel junctions for p-n junction device interconnects. Previously only doping levels could be varied to control the tunneling properties. This invention uses the valence band alignment band of the GaAsSb with respect to the surrounding materials to greatly relax the doping requirements for tunneling.

  2. U0174100.doc

    Office of Legacy Management (LM)

    4100 DOE/EA-1452 Environmental Assessment of Ground Water Compliance at the Durango, Colorado, UMTRA Project Site Final November 2002 Prepared by U.S. Department of Energy Grand Junction Office Grand Junctio n, Colorado Work Performed Under DOE Contract Number DE-AC13-02GJ79491 DOE Grand Junction Office EA of Ground Water Compliance at the Durango Site November 2002 Final Page iii Contents Page Acronyms and Abbreviations

  3. Microsoft Word - U0159200June.doc

    Office of Legacy Management (LM)

    U0159200 GJO-2002-312-TAR GWMON-28.7-1 U.S. Department of Energy UMTRA Ground Water Research Project Phytoremediation of Nitrogen Contamination in Subpile Soils and in the Alluvial Aquifer at the Monument Valley, Arizona, Uranium Mill Tailings Site June 2002 Environmental Research Laboratory University of Arizona, Tucson, Arizona Environmental Sciences Laboratory U.S. Department of Energy Grand Junction Office Grand Junction, Colorado This page intentionally left blank Acknowledgements This

  4. SUMMARY REPORT For MONITORTNG AND MITIGATlON OF MESA VERDE CACTUS

    Office of Legacy Management (LM)

    SUMMARY REPORT For MONITORTNG AND MITIGATlON OF MESA VERDE CACTUS (SCLEROCACTUS MESAEVERDAE) NAVAJO TRIBAL UTILITY AUTHORITY POWERLINE UMTRA GROUND WATER PROJECT, SHIPROCK SlTE ON NAVAJO NATION TRIBAL LAND IN SAN JUAN COUNTY, NEW MEXICO Prepared For: S. M. STOLLER CORPORATION GRAND JUNCTION, COLORADO On Behalf of DEPARTMENT O W ENERGY GRAND JUNCTION, COLORADO Prepared By: ECOSPHERE ENVIRONMENTAL SERVICES NAVAJO FISH AND WJLDLIli'E PERMIT #000802-001 FARIVWGTON, NEW MEXICO NOVEMBER 2003 RECORD

  5. HEALTH AND SAFETY RESEARCH DIVISION REPORT OF INCLUSION SURVEY AT LOCATION CA00401

    Office of Legacy Management (LM)

    Location mbe: (- Location Number: (CA00401) HEALTH AND SAFETY RESEARCH DIVISION REPORT OF INCLUSION SURVEY AT LOCATION CA00401 MAYER STREET BRIDGEVILLE, PENNSYLVANIA 15017 Investigation Team B. A. Berven - RASA Program Manager C. A. Little - RASA/UMTRA Project Director C. Clark, Jr. - Survey Team Leader John K. Williams December 1985 WORK PERFORMED AS PART OF THE RADIOLOGICAL SURVEY ACTIVITIES PROGRAM Prepared by the OAK RIDGE NATIONAL LABORATORY Grand Junction Office Grand Junction, Colorado

  6. DOE - Office of Legacy Management -- GJP

    Office of Legacy Management (LM)

    Processing Site Key Documents and Links All documents are Adobe Acrobat files. pdf_icon Key Documents Fact Sheet 2011 5-Year Inspection and Site Status Report for the Grand Junction, Colorado, UMTRCA Title I Processing Site Data Validation Package-January 2011 Groundwater and Surface Water Sampling Ground Water Compliance Action Plan for the Grand Junction,Colorado, UMTRA Project Site Please be green. Do not print these documents unless absolutely necessary. Submit a FOIA Request for documents

  7. Multi-junction solar cell device

    DOE Patents [OSTI]

    Friedman, Daniel J. (Lakewood, CO); Geisz, John F. (Wheat Ridge, CO)

    2007-12-18

    A multi-junction solar cell device (10) is provided. The multi-junction solar cell device (10) comprises either two or three active solar cells connected in series in a monolithic structure. The multi-junction device (10) comprises a bottom active cell (20) having a single-crystal silicon substrate base and an emitter layer (23). The multi-junction device (10) further comprises one or two subsequent active cells each having a base layer (32) and an emitter layer (23) with interconnecting tunnel junctions between each active cell. At least one layer that forms each of the top and middle active cells is composed of a single-crystal III-V semiconductor alloy that is substantially lattice-matched to the silicon substrate (22). The polarity of the active p-n junction cells is either p-on-n or n-on-p. The present invention further includes a method for substantially lattice matching single-crystal III-V semiconductor layers with the silicon substrate (22) by including boron and/or nitrogen in the chemical structure of these layers.

  8. Grand Junction Office Founder Honored at the Philip C. Leahy Memorial Park

    Broader source: Energy.gov (indexed) [DOE]

    Dedication and Open House | Department of Energy 4. Optimize the use of land and assets. plaque.png The memorial plaque was unveiled at the event. The U.S. Department of Energy (DOE) Office of Legacy Management (LM) held an open house and park dedication at the Grand Junction, Colorado, Office to commemorate its place in the Manhattan Project and Cold War histories. The park, located in the middle of the Grand Junction Office campus, was dedicated to Army Major (retired) Philip C. Leahy.

  9. A single-gradient junction technique to replace multiple-junction shifts for craniospinal irradiation treatment

    SciTech Connect (OSTI)

    Hadley, Austin; Ding, George X.

    2014-01-01

    Craniospinal irradiation (CSI) requires abutting fields at the cervical spine. Junction shifts are conventionally used to prevent setup errorinduced overdosage/underdosage from occurring at the same location. This study compared the dosimetric differences at the cranial-spinal junction between a single-gradient junction technique and conventional multiple-junction shifts and evaluated the effect of setup errors on the dose distributions between both techniques for a treatment course and single fraction. Conventionally, 2 lateral brain fields and a posterior spine field(s) are used for CSI with weekly 1-cm junction shifts. We retrospectively replanned 4 CSI patients using a single-gradient junction between the lateral brain fields and the posterior spine field. The fields were extended to allow a minimum 3-cm field overlap. The dose gradient at the junction was achieved using dose painting and intensity-modulated radiation therapy planning. The effect of positioning setup errors on the dose distributions for both techniques was simulated by applying shifts of 3 and 5 mm. The resulting cervical spine doses across the field junction for both techniques were calculated and compared. Dose profiles were obtained for both a single fraction and entire treatment course to include the effects of the conventional weekly junction shifts. Compared with the conventional technique, the gradient-dose technique resulted in higher dose uniformity and conformity to the target volumes, lower organ at risk (OAR) mean and maximum doses, and diminished hot spots from systematic positioning errors over the course of treatment. Single-fraction hot and cold spots were improved for the gradient-dose technique. The single-gradient junction technique provides improved conformity, dose uniformity, diminished hot spots, lower OAR mean and maximum dose, and one plan for the entire treatment course, which reduces the potential human error associated with conventional 4-shifted plans.

  10. Projects | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Projects Projects

  11. Methods for the fabrication of thermally stable magnetic tunnel junctions

    DOE Patents [OSTI]

    Chang, Y. Austin (Middleton, WI); Yang, Jianhua J. (Madison, WI); Ladwig, Peter F. (Hutchinson, MN)

    2009-08-25

    Magnetic tunnel junctions and method for making the magnetic tunnel junctions are provided. The magnetic tunnel junctions are characterized by a tunnel barrier oxide layer sandwiched between two ferromagnetic layers. The methods used to fabricate the magnetic tunnel junctions are capable of completely and selectively oxidizing a tunnel junction precursor material using an oxidizing gas containing a mixture of gases to provide a tunnel junction oxide without oxidizing the adjacent ferromagnetic materials. In some embodiments the gas mixture is a mixture of CO and CO.sub.2 or a mixture of H.sub.2 and H.sub.2O.

  12. Junction-side illuminated silicon detector arrays

    DOE Patents [OSTI]

    Iwanczyk, Jan S.; Patt, Bradley E.; Tull, Carolyn

    2004-03-30

    A junction-side illuminated detector array of pixelated detectors is constructed on a silicon wafer. A junction contact on the front-side may cover the whole detector array, and may be used as an entrance window for light, x-ray, gamma ray and/or other particles. The back-side has an array of individual ohmic contact pixels. Each of the ohmic contact pixels on the back-side may be surrounded by a grid or a ring of junction separation implants. Effective pixel size may be changed by separately biasing different sections of the grid. A scintillator may be coupled directly to the entrance window while readout electronics may be coupled directly to the ohmic contact pixels. The detector array may be used as a radiation hardened detector for high-energy physics research or as avalanche imaging arrays.

  13. Complementary junction heterostructure field-effect transistor

    DOE Patents [OSTI]

    Baca, A.G.; Drummond, T.J.; Robertson, P.J.; Zipperian, T.E.

    1995-12-26

    A complimentary pair of compound semiconductor junction heterostructure field-effect transistors and a method for their manufacture are disclosed. The p-channel junction heterostructure field-effect transistor uses a strained layer to split the degeneracy of the valence band for a greatly improved hole mobility and speed. The n-channel device is formed by a compatible process after removing the strained layer. In this manner, both types of transistors may be independently optimized. Ion implantation is used to form the transistor active and isolation regions for both types of complimentary devices. The invention has uses for the development of low power, high-speed digital integrated circuits. 10 figs.

  14. Complementary junction heterostructure field-effect transistor

    DOE Patents [OSTI]

    Baca, Albert G.; Drummond, Timothy J.; Robertson, Perry J.; Zipperian, Thomas E.

    1995-01-01

    A complimentary pair of compound semiconductor junction heterostructure field-effect transistors and a method for their manufacture are disclosed. The p-channel junction heterostructure field-effect transistor uses a strained layer to split the degeneracy of the valence band for a greatly improved hole mobility and speed. The n-channel device is formed by a compatible process after removing the strained layer. In this manner, both types of transistors may be independently optimized. Ion implantation is used to form the transistor active and isolation regions for both types of complimentary devices. The invention has uses for the development of low power, high-speed digital integrated circuits.

  15. High voltage series connected tandem junction solar battery

    DOE Patents [OSTI]

    Hanak, Joseph J. (Lawrenceville, NJ)

    1982-01-01

    A high voltage series connected tandem junction solar battery which comprises a plurality of strips of tandem junction solar cells of hydrogenated amorphous silicon having one optical path and electrically interconnected by a tunnel junction. The layers of hydrogenated amorphous silicon, arranged in a tandem configuration, can have the same bandgap or differing bandgaps. The tandem junction strip solar cells are series connected to produce a solar battery of any desired voltage.

  16. Grand Junction, Colorado, Processing Site and Disposal Sites Fact Sheet

    Office of Legacy Management (LM)

    Grand Junction, Colorado, Disposal and Processing Sites This fact sheet provides information about the Uranium Mill Tailings Radiation Control Act of 1978 Title I disposal and processing sites at Grand Junction, Colorado. These sites are managed by the U.S. Department of Energy Office of Legacy Management. Locations of the Grand Junction, Colorado, Sites Site Description and History The former Grand Junction processing site, historically known as the Climax uranium mill, sits at an elevation of

  17. Moab Project Continues Excellent Safety Record | Department of Energy

    Energy Savers [EERE]

    Excellent Safety Record Moab Project Continues Excellent Safety Record December 23, 2014 - 12:00pm Addthis Final cover materials are placed over tailings in the Crescent Junction disposal cell. Final cover materials are placed over tailings in the Crescent Junction disposal cell. MOAB, Utah - The Moab Uranium Mill Tailings Remedial Action Project has had a safe, productive year. The project had no recordable injuries this year, and it has gone more than five years without a lost-time injury or

  18. Gallium nitride junction field-effect transistor

    DOE Patents [OSTI]

    Zolper, John C. (Albuquerque, NM); Shul, Randy J. (Albuquerque, NM)

    1999-01-01

    An all-ion implanted gallium-nitride (GaN) junction field-effect transistor (JFET) and method of making the same. Also disclosed are various ion implants, both n- and p-type, together with or without phosphorous co-implantation, in selected III-V semiconductor materials.

  19. Tandem junction amorphous silicon solar cells

    DOE Patents [OSTI]

    Hanak, Joseph J. (Lawrenceville, NJ)

    1981-01-01

    An amorphous silicon solar cell has an active body with two or a series of layers of hydrogenated amorphous silicon arranged in a tandem stacked configuration with one optical path and electrically interconnected by a tunnel junction. The layers of hydrogenated amorphous silicon arranged in tandem configuration can have the same bandgap or differing bandgaps.

  20. Gallium nitride junction field-effect transistor

    DOE Patents [OSTI]

    Zolper, J.C.; Shul, R.J.

    1999-02-02

    An ion implanted gallium-nitride (GaN) junction field-effect transistor (JFET) and method of making the same are disclosed. Also disclosed are various ion implants, both n- and p-type, together with or without phosphorus co-implantation, in selected III-V semiconductor materials. 19 figs.

  1. u42501.PDF

    Office of Legacy Management (LM)

    88-TAR Rev. 1 Final Site Observational Work Plan for the UMTRA Project Old Rifle Site August 1999 Prepared by U.S. Department of Energy Grand Junction Office Grand Junction, Colorado Project Number UGW-511-0017-06-000 Document Number U0042501 Work Performed under DOE Contract No. DE-AC13-96GJ87335 Document Number U0042501 Contents DOE/Grand Junction Office Site Observational Work Plan for Old Rifle, Colorado August 1999 Page iii Contents Page Acronyms and

  2. MAC-GWHAT

    Office of Legacy Management (LM)

    GWHAT 1.1 Rev. 1 Final Site Observational Work Plan for the UMTRA Project Site at Mexican Hat, Utah July 1998 Prepared for U.S. Department of Energy Albuquerque Operations Office Grand Junction Office Prepared by MACTEC Environmental Restoration Services, LLC Grand Junction, Colorado Project Number UGW-511-0014-03-000 Document Number U0026800 Work Performed under DOE Contract No. DE-AC13-96GJ87335 Document Number U0026800 Contents DOE/Grand Junction Office Site Observational Work Plan for

  3. Report. Results of a Piezocone Investigation - Shiprock, New Mexico - February 2002. GJO-2001-276-TAR. MAC-GWSHP 13.3-1.

    Office of Legacy Management (LM)

    GJO-2001-276-TAR MAC-GWSHP13.3-1 UMTRA Ground Water Project Results of A Piezocone Investigation Shiprock, New Mexico February 2002 Prepared by U.S. Department of Energy Grand Junction Office Grand Junction, Colorado Project Number UGW-511-0020-28-003 Document Number U0145400 Work Performed Under DOE Contract Number DE-AC13-96GJ87335 Document Number U0145400 DOE/Grand Junction Office Results of A Piezocone InvestigationShiprock, New Mexico February 2002 Page 2 Executive Summary A piezocone

  4. Junction conditions in extended Teleparallel gravities

    SciTech Connect (OSTI)

    De la Cruz-Dombriz, lvaro; Dunsby, Peter K.S.; Sez-Gmez, Diego E-mail: peter.dunsby@uct.ac.za

    2014-12-01

    In the context of extended Teleparallel gravity theories, we address the issue of junction conditions required to guarantee the correct matching of different regions of spacetime. In the absence of shells/branes, these conditions turn out to be more restrictive than their counterparts in General Relativity as in other extended theories of gravity. In fact, the general junction conditions on the matching hypersurfaces depend on the underlying theory and a new condition on the induced tetrads in order to avoid delta-like distributions in the field equations. This result imposes strict consequences on the viability of standard solutions such as the Einstein-Straus-like construction. We find that the continuity of the scalar torsion is required in order to recover the usual General Relativity results.

  5. Semiconductor junction formation by directed heat

    DOE Patents [OSTI]

    Campbell, Robert B.

    1988-03-24

    The process of the invention includes applying precursors 6 with N- and P-type dopants therein to a silicon web 2, with the web 2 then being baked in an oven 10 to drive off excessive solvents, and the web 2 is then heated using a pulsed high intensity light in a mechanism 12 at 1100.degree.-1150.degree. C. for about 10 seconds to simultaneously form semiconductor junctions in both faces of the web.

  6. Highly Charged Ion (HCI) Modified Tunnel Junctions

    SciTech Connect (OSTI)

    Pomeroy, J. M.; Grube, H. [Atomic Physics Division, National Institute of Standards and Technology (NIST) 100 Bureau Dr., MS 8423, Gaithersburg, MD 20899-8423 (United States)

    2009-03-10

    The neutralization energy carried by highly charged ions (HCIs) provides an alternative method for localizing energy on a target's surface, producing features and modifying surfaces with fluences and kinetic energy damage that are negligible compared to singly ionized atoms. Since each HCI can deposit an enormous amount of energy into a small volume of the surface (e.g., Xe{sup 44+} delivers 51 keV of neutralization energy per HCI), each individual HCI's interaction with the target can produce a nanoscale feature. Many studies of HCI-surface features have characterized some basic principles of this unique ion-surface interaction, but the activity reported here has been focused on studying ensembles of HCI features in ultra-thin insulating films by fabricating multi-layer tunnel junction devices. The ultra-thin insulating barriers allow current to flow by tunneling, providing a very sensitive means of detecting changes in the barrier due to highly charged ion irradiation and, conversely, HCI modification provides a method of finely tuning the transparency of the tunnel junctions that spans several orders of magnitude for devices produced from a single process recipe. Systematic variation of junction bias, temperature, magnetic field and other parameters provides determination of the transport mechanism, defect densities, and magnetic properties of these nano-features and this novel approach to device fabrication.

  7. Single P-N junction tandem photovoltaic device

    DOE Patents [OSTI]

    Walukiewicz, Wladyslaw (Kensington, CA); Ager, III, Joel W. (Berkeley, CA); Yu, Kin Man (Lafayette, CA)

    2011-10-18

    A single P-N junction solar cell is provided having two depletion regions for charge separation while allowing the electrons and holes to recombine such that the voltages associated with both depletion regions of the solar cell will add together. The single p-n junction solar cell includes an alloy of either InGaN or InAlN formed on one side of the P-N junction with Si formed on the other side in order to produce characteristics of a two junction (2J) tandem solar cell through only a single P-N junction. A single P-N junction solar cell having tandem solar cell characteristics will achieve power conversion efficiencies exceeding 30%.

  8. Single P-N junction tandem photovoltaic device

    DOE Patents [OSTI]

    Walukiewicz, Wladyslaw (Kensington, CA); Ager, III, Joel W. (Berkeley, CA); Yu, Kin Man (Lafayette, CA)

    2012-03-06

    A single P-N junction solar cell is provided having two depletion regions for charge separation while allowing the electrons and holes to recombine such that the voltages associated with both depletion regions of the solar cell will add together. The single p-n junction solar cell includes an alloy of either InGaN or InAlN formed on one side of the P-N junction with Si formed on the other side in order to produce characteristics of a two junction (2J) tandem solar cell through only a single P-N junction. A single P-N junction solar cell having tandem solar cell characteristics will achieve power conversion efficiencies exceeding 30%.

  9. F:\SHARE\SE\Web_Origs\Wrk_Jan\00-055\U0027401.PDF

    Office of Legacy Management (LM)

    9-TAR Phase I Ground Water Compliance Action Plan for the Tuba City, Arizona, UMTRA Site June 1999 Prepared by U.S. Department of Energy Grand Junction Office Grand Junction, Colorado Project Number UGW-511-0023-05-000 Document Number U0027401 Work Performed under DOE Contract No. DE-AC13-96GJ87335 Document Number U0027401 Contents DOE/Grand Junction Office Phase I Ground Water Compliance Action Plan for Tuba City, Arizona June 1999 Page iii Contents Page 1.0 Introduction . . . . . . . . . . . .

  10. Solar Junction Develops World Record Setting Concentrated Photovoltaic

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Solar Cell | Department of Energy Junction Develops World Record Setting Concentrated Photovoltaic Solar Cell Solar Junction Develops World Record Setting Concentrated Photovoltaic Solar Cell April 18, 2013 - 12:00am Addthis Partnering with Solar Junction of San Jose, EERE supported the development of the company's concentrated photovoltaic technology that also set a world record for conversion efficiency. The company's cell technology relies on inexpensive lenses to magnify the amount of

  11. EERE Success Story-Solar Junction Develops World Record Setting

    Office of Environmental Management (EM)

    Concentrated Photovoltaic Solar Cell | Department of Energy Junction Develops World Record Setting Concentrated Photovoltaic Solar Cell EERE Success Story-Solar Junction Develops World Record Setting Concentrated Photovoltaic Solar Cell April 18, 2013 - 12:00am Addthis Partnering with Solar Junction of San Jose, EERE supported the development of the company's concentrated photovoltaic technology that also set a world record for conversion efficiency. The company's cell technology relies on

  12. Fabrication of magnetic tunnel junctions with epitaxial and textured ferromagnetic layers

    DOE Patents [OSTI]

    Chang, Y. Austin (Middleton, WI); Yang, Jianhua Joshua (Madison, WI)

    2008-11-11

    This invention relates to magnetic tunnel junctions and methods for making the magnetic tunnel junctions. The magnetic tunnel junctions include a tunnel barrier oxide layer sandwiched between two ferromagnetic layers both of which are epitaxial or textured with respect to the underlying substrate upon which the magnetic tunnel junctions are grown. The magnetic tunnel junctions provide improved magnetic properties, sharper interfaces and few defects.

  13. Hetero-junctions of Boron Nitride and Carbon Nanotubes: Synthesis...

    Office of Scientific and Technical Information (OSTI)

    3) quantum dots functionalized BNNTs (QDs-BNNTs), 4) BNNTgraphene junctions. We have started to understand their structural, compositional, more and electronic properties. ...

  14. City of Grand Junction, Iowa (Utility Company) | Open Energy...

    Open Energy Info (EERE)

    Iowa (Utility Company) Jump to: navigation, search Name: Grand Junction Municipal Utilities Place: Iowa Phone Number: (515) 738-2285 or (515) 738-2726 Facebook: https:...

  15. Phonon Bottleneck in Graphene-Based Josephson Junctions at Millikelvin

    Office of Scientific and Technical Information (OSTI)

    Phonon Bottleneck in Graphene-Based Josephson Junctions at Millikelvin Temperatures Borzenets, I. V.; Coskun, U. C.; Mebrahtu, H. T.; Bomze, Yu. V.; Smirnov, A. I.; Finkelstein, G....

  16. Apache Junction, Arizona: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    Junction, Arizona: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 33.4150485, -111.5495777 Show Map Loading map... "minzoom":false,"mappingser...

  17. Grand Junction, Colorado: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    district.12 Registered Energy Companies in Grand Junction, Colorado Ruby Canyon Engineering Inc References US Census Bureau Incorporated place and minor civil...

  18. Heterojunction for Multi-Junction Solar Cells - Energy Innovation...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Advanced Materials Find More Like This Return to Search Heterojunction for Multi-Junction Solar Cells Sandia National Laboratories Contact SNL About This Technology...

  19. Phonon interference effects in molecular junctions

    SciTech Connect (OSTI)

    Markussen, Troels

    2013-12-28

    We study coherent phonon transport through organic, ?-conjugated molecules. Using first principles calculations and Green's function methods, we find that the phonon transmission function in cross-conjugated molecules, like meta-connected benzene, exhibits destructive quantum interference features very analogous to those observed theoretically and experimentally for electron transport in similar molecules. The destructive interference features observed in four different cross-conjugated molecules significantly reduce the thermal conductance with respect to linear conjugated analogues. Such control of the thermal conductance by chemical modifications could be important for thermoelectric applications of molecular junctions.

  20. Josephson junctions in high-T/sub c/ superconductors

    DOE Patents [OSTI]

    Falco, C.M.; Lee, T.W.

    1981-01-14

    The invention includes a high T/sub c/ Josephson sperconducting junction as well as the method and apparatus which provides the junction by application of a closely controlled and monitored electrical discharge to a microbridge region connecting two portions of a superconducting film.

  1. Subgap biasing of superconducting tunnel junctions without a magnetic field

    SciTech Connect (OSTI)

    Segall, K.; Moyer, J.; Mazo, Juan J.

    2008-08-15

    Superconducting tunnel junctions (STJs) have been successfully used as single-photon detectors but require the use of a magnetic field to operate. A recent paper has proposed the idea to use a circuit of three junctions in place of a single junction in order to achieve the necessary biasing without applying a magnetic field. The nonlinear interaction between the different junctions in the circuit causes the existence of a stable subgap state for one of the junctions, which acts as the detector junction. In this paper, we present the first measurements demonstrating the existence of such a biasing state feasible for STJ detectors. Single junction measurements with an applied magnetic field help determine the functional form of the subgap current versus voltage; then the operating point of a three-junction circuit is measured and fit to theory. The excellent match between theory and experiment demonstrates the existence of the subgap biasing state. The outlook for possible use in detector applications is discussed.

  2. Phase diagram of Josephson junction between s and s ± superconductors...

    Office of Scientific and Technical Information (OSTI)

    Phase diagram of Josephson junction between s and s superconductors in the dirty limit Title: Phase diagram of Josephson junction between s and s superconductors in the dirty ...

  3. Phase diagram of Josephson junction between s and s ± superconductors...

    Office of Scientific and Technical Information (OSTI)

    Publisher's Accepted Manuscript: Phase diagram of Josephson junction between s and s superconductors in the dirty limit Title: Phase diagram of Josephson junction between s and ...

  4. Transient drainage summary report

    SciTech Connect (OSTI)

    1996-09-01

    This report summarizes the history of transient drainage issues on the Uranium Mill Tailings Remedial Action (UMTRA) Project. It defines and describes the UMTRA Project disposal cell transient drainage process and chronicles UMTRA Project treatment of the transient drainage phenomenon. Section 4.0 includes a conceptual cross section of each UMTRA Project disposal site and summarizes design and construction information, the ground water protection strategy, and the potential for transient drainage.

  5. Spin Josephson effect in topological superconductor-ferromagnet junction

    SciTech Connect (OSTI)

    Ren, C. D.; Wang, J.

    2014-03-21

    The composite topological superconductor (TS), made of one-dimensional spin-orbit coupled nanowire with proximity-induced s-wave superconductivity, is not a pure p-wave superconductor but still has a suppressed s-wave pairing. We propose to probe the spin texture of the p-wave pairing in this composite TS by examining possible spin supercurrents in an unbiased TS/ferromagnet junction. It is found that both the exchange-coupling induced and spin-flip reflection induced spin currents exist in the setup and survive even in the topological phase. We showed that besides the nontrivial p-wave pairing state accounting for Majorana Fermions, there shall be a trivial p-wave pairing state that contributes to spin supercurrent. The trivial p-wave pairing state is diagnosed from the mixing effect between the suppressed s-wave pairing and the topologically nontrivial p-wave pairing. The d vector of the TS is proved not to be rigorously perpendicular to the spin projection of p-wave pairings. Our findings are also confirmed by the Kitaev's p-wave model with a nonzero s-wave pairing.

  6. Field-effect P-N junction

    DOE Patents [OSTI]

    Regan, William; Zettl, Alexander

    2015-05-05

    This disclosure provides systems, methods, and apparatus related to field-effect p-n junctions. In one aspect, a device includes an ohmic contact, a semiconductor layer disposed on the ohmic contact, at least one rectifying contact disposed on the semiconductor layer, a gate including a layer disposed on the at least one rectifying contact and the semiconductor layer and a gate contact disposed on the layer. A lateral width of the rectifying contact is less than a semiconductor depletion width of the semiconductor layer. The gate contact is electrically connected to the ohmic contact to create a self-gating feedback loop that is configured to maintain a gate electric field of the gate.

  7. Contents of environmental assessments prepared for the Uranium Mill Tailings Remedial Action Project

    SciTech Connect (OSTI)

    Not Available

    1986-01-01

    This document presents two versions of the outline for the environmental assessments (EAS) to be prepared for the Uranium Mill Tailings Remedial Action (UMTRA) Project. The first displays the basic structure of the assessments; it lists only the titles of sections. The second is a guide to the contents of the assessments which provides, under each title, a brief summary of contents. The outline is intended to comply with the planning requirements (40 CFR Part 1501) and the definitions of terms (40-' CFR Part 1508) established by the Council on Environmental Quality as well as DOE order 5440.lB (Implementation of the National Environmental Policy Act), and compliance with Floodplain/Wetlands Environmental Review Requirements (10 CFR Part 1022). These requirements and definitions are implicitly part of the outline. The outline presented in this document will guide the preparation of EAs. The UMTRA Project EAs will be used in determining whether the DOE should prepare an environmental impact statement or a finding of no significant impact for the actions at each of the sites. If no impact statement is necessary, the environmental assessment for that site will aid the DOE in complying with the National Environmental Policy Act before beginning remedial actions. If an impact statement is needed, the assessment will aid its preparation. These purposes, established by the Council on Environmental Quality in 40 CFR Part 1508.9(a), have guided the construction of the outline presented in this document. Remedial actions at each site will include the cleanup of properties in the vicinity of the tailings sites that have been contaminated by the tailings.

  8. Contents of environmental assessments prepared for the Uranium Mill Tailings Remedial Action Project

    SciTech Connect (OSTI)

    Not Available

    1986-01-01

    This document presents two versions of the outline for the environmental assessments (EAS) to be prepared for the Uranium Mill Tailings Remedial Action (UMTRA) Project. The first displays the basic structure of the assessments; it lists only the titles of sections. The second is a guide to the contents of the assessments which provides, under each title, a brief summary of contents. The outline is intended to comply with the planning requirements (40 CFR Part 1501) and the definitions of terms (40-` CFR Part 1508) established by the Council on Environmental Quality as well as DOE order 5440.lB (Implementation of the National Environmental Policy Act), and compliance with Floodplain/Wetlands Environmental Review Requirements (10 CFR Part 1022). These requirements and definitions are implicitly part of the outline. The outline presented in this document will guide the preparation of EAs. The UMTRA Project EAs will be used in determining whether the DOE should prepare an environmental impact statement or a finding of no significant impact for the actions at each of the sites. If no impact statement is necessary, the environmental assessment for that site will aid the DOE in complying with the National Environmental Policy Act before beginning remedial actions. If an impact statement is needed, the assessment will aid its preparation. These purposes, established by the Council on Environmental Quality in 40 CFR Part 1508.9(a), have guided the construction of the outline presented in this document. Remedial actions at each site will include the cleanup of properties in the vicinity of the tailings sites that have been contaminated by the tailings.

  9. MAC-GWMON

    Office of Legacy Management (LM)

    GWMON 1.1 Final Site Observational Work Plan for the UMTRA Project Site at Monument Valley, Arizona April 1999 Prepared by U.S. Department of Energy Grand Junction Office Grand Junction, Colorado Project Number UGW-511-0015-07-000 Document Number U0018101 Work Performed under DOE Contract No. DE-AC13-96GJ87335 Note: Some of the section page numbers in the Table of Contents may not correspond to the page on which the section appears when viewing them in Adobe Acrobat. Document Number U0018101

  10. Monument Valley Phytoremediation Pilot Study:

    Office of Legacy Management (LM)

    1.8 U.S. Department of Energy UMTRA Ground Water Project Monument Valley Ground Water Remediation Work Plan: Native Plant Farming and Phytoremediation Pilot Study August 1998 Prepared for U.S. Department of Energy Albuquerque Operations Office Grand Junction Office Prepared by MACTEC Environmental Restoration Services, LLC Grand Junction, Colorado Project Number UGW-511-0015-10-000 Document Number U0029501 Work Performed under DOE Contract No. DE-AC13-96GJ87335 Note: Some of the section page

  11. F:\SHARE\SE\Web_Origs\Wrk_Jan\00-084\U0013801

    Office of Legacy Management (LM)

    Site Observational Work Plan for the UMTRA Project Site at Riverton, Wyoming February 1998 Prepared for U.S. Department of Energy Albuquerque Operations Office Grand Junction Office Prepared by MACTEC Environmental Restoration Services, LLC Grand Junction, Colorado Project Number UGW-511-0018-02-000 Document Number U0013801 Work Performed under DOE Contract No. DE-AC13-96GJ87335 Note: Some of the section page numbers in the Table of Contents may not correspond to the page on which the section

  12. Mechanical deformations of boron nitride nanotubes in crossed junctions

    SciTech Connect (OSTI)

    Zhao, Yadong; Chen, Xiaoming; Ke, Changhong; Park, Cheol; Fay, Catharine C.; Stupkiewicz, Stanislaw

    2014-04-28

    We present a study of the mechanical deformations of boron nitride nanotubes (BNNTs) in crossed junctions. The structure and deformation of the crossed tubes in the junction are characterized by using atomic force microscopy. Our results show that the total tube heights are reduced by 20%33% at the crossed junctions formed by double-walled BNNTs with outer diameters in the range of 2.214.67?nm. The measured tube height reduction is found to be in a nearly linear relationship with the summation of the outer diameters of the two tubes forming the junction. The contact force between the two tubes in the junction is estimated based on contact mechanics theories and found to be within the range of 4.27.6 nN. The Young's modulus of BNNTs and their binding strengths with the substrate are quantified, based on the deformation profile of the upper tube in the junction, and are found to be 1.07??0.11 TPa and 0.180.29 nJ/m, respectively. Finally, we perform finite element simulations on the mechanical deformations of the crossed BNNT junctions. The numerical simulation results are consistent with both the experimental measurements and the analytical analysis. The results reported in this paper contribute to a better understanding of the structural and mechanical properties of BNNTs and to the pursuit of their applications.

  13. PCB usage at the Grand Junction Area Office Facility. Final report

    SciTech Connect (OSTI)

    Miller, M.E.; Donivan, S.

    1982-06-01

    The development, implementation, and results of the polychlorinated biphenyl (PCB) identification project at the Grand Junction Area Office (GJAO) are summarized. Methodology for the PCB analysis is described, and results are tabulated. Of the 51 transformers and disconnects in use at GJAO, 15 unites were determined to be PCB-contaminated or filled with PCBs. This number falls within EPA's estimate of 25 to 40 percent of all transformers in use being at least contaminated. Approximately 324 gallons of PCBs and 515 gallons of PCB-contaminated fluids are being used currently. No contaminated transformers or disconnects are in a position to contaminate food or feed products at the facility.

  14. Effect of current injection into thin-film Josephson junctions

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Kogan, V. G.; Mints, R. G.

    2014-11-11

    New thin-film Josephson junctions have recently been tested in which the current injected into one of the junction banks governs Josephson phenomena. One thus can continuously manage the phase distribution at the junction by changing the injected current. Our method of calculating the distribution of injected currents is also proposed for a half-infinite thin-film strip with source-sink points at arbitrary positions at the film edges. The strip width W is assumed small relative to Λ=2λ2/d;λ is the bulk London penetration depth of the film material and d is the film thickness.

  15. Long-Term Surveillance Plan for the Sherwood Project (UMTRCA Title II) Reclamation Cell, Wellpinit, Washington, February 2001

    Office of Legacy Management (LM)

    Program Long-Term Surveillance Plan for the DOE Sherwood Project (UMTRCA Title II) Reclamation Cell Wellpinit, Washington February 2001 Prepared by U.S. Department of Energy Grand Junction Office Grand Junction, Colorado Work Performed Under DOE Contract Number DE-AC13-96GJ87335 Task Order Number MAC 01-06 Document Number S00204 DOE/Grand Junction Office Sherwood LTSP February 2001 Page iii Contents 1.0

  16. White River Junction, Vermont: Energy Resources | Open Energy...

    Open Energy Info (EERE)

    Hide Map This article is a stub. You can help OpenEI by expanding it. White River Junction is a census-designated place in Windsor County, Vermont. It falls under...

  17. Coso Junction, California: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    OpenEI by expanding it. Coso Junction is a city in Inyo County, California. It is in Rose Valley, south of Dunmovin and west of Sugarloaf Mountain.1 Energy Generation...

  18. Manipulating Josephson junctions in thin-films by nearby vortices

    SciTech Connect (OSTI)

    Kogan, V G; Mints, R G

    2014-07-01

    It is shown that a vortex trapped in one of the banks of a planar edge-type Josephson junction in a narrow thin-film superconducting strip can change drastically the dependence of the junction critical current on the applied field, I-c(H). When the vortex is placed at certain discrete positions in the strip middle, the pattern I-c(H) has zero at H = 0 instead of the traditional maximum of '0-type' junctions. The number of these positions is equal to the number of vortices trapped at the same location. When the junction-vortex separation exceeds similar to W, the strip width, I-c(H) is no longer sensitive to the vortex presence. The same is true for any separation if the vortex approaches the strip edges. (C) 2014 Elsevier B.V. All rights reserved.

  19. Single-charge detection by an atomic precision tunnel junction

    SciTech Connect (OSTI)

    House, M. G. Peretz, E.; Keizer, J. G.; Hile, S. J.; Simmons, M. Y.

    2014-03-17

    We demonstrate sensitive detection of single charges using a planar tunnel junction 8.5?nm wide and 17.2?nm long defined by an atomically precise phosphorus doping profile in silicon. The conductance of the junction responds to a nearby gate potential and also to changes in the charge state of a quantum dot patterned 52?nm away. The response of this detector is monotonic across the entire working voltage range of the device, which will make it particularly useful for studying systems of multiple quantum dots. The charge sensitivity is maximized when the junction is most conductive, suggesting that more sensitive detection can be achieved by shortening the length of the junction to increase its conductance.

  20. DNA Gridiron Nanostructures Based on Four-Arm Junctions

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    DNA Gridiron Nanostructures Based on Four-Arm Junctions Authors: Han, D., Pal, S., Yang, Y., Jiang, S., Nangreave, J., Liu, Y., and Yan, H. Title: DNA Gridiron Nanostructures Based...

  1. Phase diagram of Josephson junction between

    Office of Scientific and Technical Information (OSTI)

    diagram of Josephson junction betweensandssuperconductors in the dirty limit...

  2. High Efficiency Multiple-Junction Solar Cells - Energy Innovation Portal

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Solar Photovoltaic Solar Photovoltaic Find More Like This Return to Search High Efficiency Multiple-Junction Solar Cells Sandia National Laboratories Contact SNL About This Technology Publications: PDF Document Publication Market Sheet (937 KB) Technology Marketing SummarySingle junction solar cells have limited efficiency and fail to extract maximum energy from photons outside of a specific spectral region. Higher efficiency and optical to electrical energy conversion is achieved by stacking

  3. Phonon Bottleneck in Graphene-Based Josephson Junctions at Millikelvin

    Office of Scientific and Technical Information (OSTI)

    Temperatures (Journal Article) | DOE PAGES Phonon Bottleneck in Graphene-Based Josephson Junctions at Millikelvin Temperatures Title: Phonon Bottleneck in Graphene-Based Josephson Junctions at Millikelvin Temperatures Authors: Borzenets, I. V. ; Coskun, U. C. ; Mebrahtu, H. T. ; Bomze, Yu. V. ; Smirnov, A. I. ; Finkelstein, G. Publication Date: 2013-07-09 OSTI Identifier: 1103762 Type: Publisher's Accepted Manuscript Journal Name: Physical Review Letters Additional Journal Information:

  4. Design of Flexible-Duct Junction Boxes | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Design of Flexible-Duct Junction Boxes Design of Flexible-Duct Junction Boxes This presentation was delivered at the U.S. Department of Energy Building America Technical Update meeting on April 29-30, 2013, in Denver, Colorado. PDF icon cq5_duct_splitter_box_beach.pdf More Documents & Publications Critical Question #5: What are Recent Innovations in Air Distribution Systems? Building America Technology Solutions for New and Existing Homes: New Insights for Improving the Designs of Flexible

  5. EA-1338: Transfer of the Department of Energy Grand Junction Office to Non-DOE Ownership, Grand Junction, Colorado

    Broader source: Energy.gov [DOE]

    This EA evaluates the environmental impacts for the proposed transfer of real and personal property at the U.S. Department of Energy's Grand Junction Office to non-DOE ownership.

  6. PROJECT PROFILE: Mechanically Stacked Hybrid Photovoltaic Tandems |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy Mechanically Stacked Hybrid Photovoltaic Tandems PROJECT PROFILE: Mechanically Stacked Hybrid Photovoltaic Tandems Funding Opportunity: SuNLaMP SunShot Subprogram: Photovoltaics Location: National Renewable Energy Laboratory, Golden, CO Amount Awarded: $999,999 Tandem cell architectures present a path toward higher module efficiencies over single junction designs. This project will develop a gallium indium phosphide (GaInP) on silicon mechanically stacked voltage-matched

  7. Measure Guideline: Optimizing the Configuration of Flexible Duct Junction Boxes

    SciTech Connect (OSTI)

    Beach, R.; Burdick, A.

    2014-03-01

    This measure guideline offers additional recommendations to heating, ventilation, and air conditioning (HVAC) system designers for optimizing flexible duct, constant-volume HVAC systems using junction boxes within Air Conditioning Contractors of America (ACCA) Manual D guidance (Rutkowski, H. Manual D -- Residential Duct Systems, 3rd edition, Version 1.00. Arlington, VA: Air Conditioning Contractors of America, 2009.). IBACOS used computational fluid dynamics software to explore and develop guidance to better control the airflow effects of factors that may impact pressure losses within junction boxes among various design configurations (Beach, R., Prahl, D., and Lange, R. CFD Analysis of Flexible Duct Junction Box Design. Golden, CO: National Renewable Energy Laboratory, submitted for publication 2013). These recommendations can help to ensure that a system aligns more closely with the design and the occupants' comfort expectations. Specifically, the recommendations described herein show how to configure a rectangular box with four outlets, a triangular box with three outlets, metal wyes with two outlets, and multiple configurations for more than four outlets. Designers of HVAC systems, contractors who are fabricating junction boxes on site, and anyone using the ACCA Manual D process for sizing duct runs will find this measure guideline invaluable for more accurately minimizing pressure losses when using junction boxes with flexible ducts.

  8. Advanced materials development for multi-junction monolithic photovoltaic devices

    SciTech Connect (OSTI)

    Dawson, L.R.; Reno, J.L.

    1996-07-01

    We report results in three areas of research relevant to the fabrication of monolithic multi-junction photovoltaic devices. (1) The use of compliant intervening layers grown between highly mismatched materials, GaAs and GaP (same lattice constant as Si), is shown to increase the structural quality of the GaAs overgrowth. (2) The use of digital alloys applied to the MBE growth of GaAs{sub x}Sb{sub l-x} (a candidate material for a two junction solar cell) provides increased control of the alloy composition without degrading the optical properties. (3) A nitrogen plasma discharge is shown to be an excellent p-type doping source for CdTe and ZnTe, both of which are candidate materials for a two junction solar cell.

  9. Superpoissonian shot noise in organic magnetic tunnel junctions

    SciTech Connect (OSTI)

    Cascales, Juan Pedro; Martinez, Isidoro; Aliev, Farkhad G.; Hong, Jhen-Yong; Lin, Minn-Tsong; Szczepański, Tomasz; Dugaev, Vitalii K.; Barnaś, Józef

    2014-12-08

    Organic molecules have recently revolutionized ways to create new spintronic devices. Despite intense studies, the statistics of tunneling electrons through organic barriers remains unclear. Here, we investigate conductance and shot noise in magnetic tunnel junctions with 3,4,9,10-perylene-teracarboxylic dianhydride (PTCDA) barriers a few nm thick. For junctions in the electron tunneling regime, with magnetoresistance ratios between 10% and 40%, we observe superpoissonian shot noise. The Fano factor exceeds in 1.5–2 times the maximum values reported for magnetic tunnel junctions with inorganic barriers, indicating spin dependent bunching in tunneling. We explain our main findings in terms of a model which includes tunneling through a two level (or multilevel) system, originated from interfacial bonds of the PTCDA molecules. Our results suggest that interfaces play an important role in the control of shot noise when electrons tunnel through organic barriers.

  10. Junction-based field emission structure for field emission display

    DOE Patents [OSTI]

    Dinh, Long N.; Balooch, Mehdi; McLean, II, William; Schildbach, Marcus A.

    2002-01-01

    A junction-based field emission display, wherein the junctions are formed by depositing a semiconducting or dielectric, low work function, negative electron affinity (NEA) silicon-based compound film (SBCF) onto a metal or n-type semiconductor substrate. The SBCF can be doped to become a p-type semiconductor. A small forward bias voltage is applied across the junction so that electron transport is from the substrate into the SBCF region. Upon entering into this NEA region, many electrons are released into the vacuum level above the SBCF surface and accelerated toward a positively biased phosphor screen anode, hence lighting up the phosphor screen for display. To turn off, simply switch off the applied potential across the SBCF/substrate. May be used for field emission flat panel displays.

  11. Computer-assisted data acquisition on Josephson junctions

    SciTech Connect (OSTI)

    Pagano, S. ); Costabile, G.; Fedullo, V.

    1989-09-01

    An automatic digital data-acquisition system for the test and characterization of superconducting Josephson tunnel junctions is presented. The key feature is represented by the high degree of interaction of the measurement system with the device under test. This is accomplished by an iterated sequence of data acquisitions, automatic analysis, and subsequent modifications of the control signals in the device. In this way, the basic calibration and the value of the relevant quantities involved with the Josephson junction are automatically determined. A connection with a host computer makes possible more complex data analysis, while the full control of the experiment by a dedicated computer allows the operator to perform nonroutine procedures.

  12. MOAB PROJECT REACHES SIGNIFICANT MILESTONE | Department of Energy

    Office of Environmental Management (EM)

    MOAB PROJECT REACHES SIGNIFICANT MILESTONE MOAB PROJECT REACHES SIGNIFICANT MILESTONE August 1, 2011 - 12:00pm Addthis View of the mill tailings pile at the MOAB site, looking east. View of the mill tailings pile at the MOAB site, looking east. The day crew at the Crescent Junction Disposal site stands in front of the container carrying the 4 millionth ton of mill tailings from the Moab site. The day crew at the Crescent Junction Disposal site stands in front of the container carrying the 4

  13. Arsen Sukiasyan > MBE Scientist - Solar Junction > Center Alumni > The

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Energy Materials Center at Cornell Arsen Sukiasyan MBE Scientist - Solar Junction Formerly a postdoc with the Schlom and Robinson Groups, Arsen joined Solar Junction in the Fall of 2012

  14. Interaction of Josephson Junction and Distant Vortex in Narrow Thin-Film Superconducting Strips

    SciTech Connect (OSTI)

    Kogan, V. G.; Mints, R. G.

    2014-01-31

    The phase difference between the banks of an edge-type planar Josephson junction crossing the narrow thin-film strip depends on wether or not vortices are present in the junction banks. For a vortex close to the junction this effect has been seen by Golod, Rydh, and Krasnov [Phys. Rev. Lett. 104, 227003 (2010)], who showed that the vortex may turn the junction into ? type. It is shown here that even if the vortex is far away from the junction, it still changes the 0 junction to a ? junction when situated close to the strip edges. Within the approximation used, the effect is independent of the vortex-junction separation, a manifestation of the topology of the vortex phase which extends to macroscopic distances of superconducting coherence.

  15. DOE - Office of Legacy Management -- Climax Uranium Co Grand Junction Mill

    Office of Legacy Management (LM)

    - CO 0-03 Climax Uranium Co Grand Junction Mill - CO 0-03 FUSRAP Considered Sites Site: Climax Uranium Co. (Grand Junction Mill) (CO.0-03) Designated Name: Alternate Name: Location: Evaluation Year: Site Operations: Site Disposition: Radioactive Materials Handled: Primary Radioactive Materials Handled: Radiological Survey(s): Site Status: Also see Grand Junction, Colorado, Processing Site Documents Related to Climax Uranium Co. (Grand Junction Mill) Data Validation Package for the August

  16. Optimized Triple-Junction Solar Cells Using Inverted Metamorphic Approach (Presentation)

    SciTech Connect (OSTI)

    Geisz, J. F.

    2008-11-01

    Record efficiencies with triple-junction inverted metamorphic designs, modeling useful to optimize, and consider operating conditions before choosing design.

  17. Data Compendium for the Logging Test Pits at the ERDA Grand Junction

    Office of Environmental Management (EM)

    Compound (December 1975) | Department of Energy Data Compendium for the Logging Test Pits at the ERDA Grand Junction Compound (December 1975) Data Compendium for the Logging Test Pits at the ERDA Grand Junction Compound (December 1975) Data Compendium for the Logging Test Pits at the ERDA Grand Junction Compound (December 1975) PDF icon Data Compendium for the Logging Test Pits at the ERDA Grand Junction Compound (December 1975) More Documents & Publications Field Calibration Facilities

  18. ALTERNATIVE MATERIALS FOR RAMP-EDGE SNS JUNCTIONS

    SciTech Connect (OSTI)

    Jia, Q.; Fan, Y.

    1999-06-01

    We report on the processing optimization and fabrication of ramp-edge high-temperature superconducting junctions by using alternative materials for both superconductor electrodes and normal-metal barrier. By using Ag-doped YBa{sub 2}Cu{sub 3}O{sub 7{minus}x} (Ag:YBCO) as electrodes and a cation-modified compound of (Pr{sub y}Gd{sub 0.6{minus}y})Ca{sub 0.4}Ba{sub 1.6}La{sub 0.4}Cu{sub 3}O{sub 7} (y = 0.4, 0.5, and 0.6) as a normal-metal barrier, high-temperature superconducting Josephson junctions have been fabricated in a ramp-edge superconductor/normal-metal/superconductor (SNS) configuration. By using Ag:YBCO as electrodes, we have found that the processing controllability /reproducibility and the stability of the SNS junctions are improved substantially. The junctions fabricated with these alternative materials show well-defined RSJ-like current vs voltage characteristics at liquid nitrogen temperature.

  19. Measure Guideline: Optimizing the Configuration of Flexible Duct Junction Boxes

    SciTech Connect (OSTI)

    Beach, R.; Burdick, A.

    2014-03-01

    This measure guideline offers additional recommendations to heating, ventilation, and air conditioning (HVAC) system designers for optimizing flexible duct, constant-volume HVAC systems using junction boxes within Air Conditioning Contractors of America (ACCA) Manual D guidance. IBACOS used computational fluid dynamics software to explore and develop guidance to better control the airflow effects of factors that may impact pressure losses within junction boxes among various design configurations. These recommendations can help to ensure that a system aligns more closely with the design and the occupants' comfort expectations. Specifically, the recommendations described herein show how to configure a rectangular box with four outlets, a triangular box with three outlets, metal wyes with two outlets, and multiple configurations for more than four outlets. Designers of HVAC systems, contractors who are fabricating junction boxes on site, and anyone using the ACCA Manual D process for sizing duct runs will find this measure guideline invaluable for more accurately minimizing pressure losses when using junction boxes with flexible ducts.

  20. Performance model assessment for multi-junction concentrating photovoltaic systems.

    SciTech Connect (OSTI)

    Riley, Daniel M.; McConnell, Robert.; Sahm, Aaron; Crawford, Clark; King, David L.; Cameron, Christopher P.; Foresi, James S.

    2010-03-01

    Four approaches to modeling multi-junction concentrating photovoltaic system performance are assessed by comparing modeled performance to measured performance. Measured weather, irradiance, and system performance data were collected on two systems over a one month period. Residual analysis is used to assess the models and to identify opportunities for model improvement.

    1. August 2015 Groundwater Sampling at the Grand Junction, Colorado, Disposal Site

      Office of Legacy Management (LM)

      Sampling at the Grand Junction, Colorado, Disposal Site October 2015 LMS/GRJ/S00815 This page intentionally left blank U.S. Department of Energy DVP-August 2015, Grand Junction, Colorado October 2015 RIN 15077245 Page i Contents Sampling Event Summary ...............................................................................................................1 Grand Junction, Colorado, Disposal Site, Sample Location Map ...................................................3 Data Assessment

    2. About Projects

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      DOE Projects MicroBooNE Project Web Pages The Project Pages hold information and links for the collaboration and its Project Managers, and also hold links to project Director's and...

    3. Antireflection Coating Design for Series Interconnected Multi-Junction Solar Cells

      SciTech Connect (OSTI)

      AIKEN,DANIEL J.

      1999-11-29

      AR coating design for multi-junction solar cells can be more challenging than in the single junction case. Reasons for this are discussed. Analytical expressions used to optimize AR coatings for single junction solar cells are extended for use in monolithic, series interconnected multi-junction solar cell AR coating design. The result is an analytical expression which relates the solar cell performance (through J{sub SC}) directly to the AR coating design through the device reflectance. It is also illustrated how AR coating design can be used to provide an additional degree of freedom for current matching multi-junction devices.

    4. AlGaAs/InGaAlP tunnel junctions for multijunction solar cells

      SciTech Connect (OSTI)

      SHARPS,P.R.; LI,N.Y.; HILLS,J.S.; HOU,H.; CHANG,PING-CHIH; BACA,ALBERT G.

      2000-05-16

      Optimization of GaInP{sub 2}/GaAs dual and GaInP{sub 2}/GaAs/Ge triple junction cells, and development of future generation monolithic multi-junction cells will involve the development of suitable high bandgap tunnel junctions. There are three criteria that a tunnel junction must meet. First, the resistance of the junction must be kept low enough so that the series resistance of the overall device is not increased. For AMO, 1 sun operation, the tunnel junction resistance should be below 5 x 10{sup {minus}2} {Omega}-cm. Secondly, the peak current density for the tunnel junction must also be larger than the J{sub sc} of the cell so that the tunnel junction I-V curve does not have a deleterious effect on the I-V curve of the multi-junction device. Finally, the tunnel junction must be optically transparent, i.e., there must be a minimum of optical absorption of photons that will be collected by the underlying subcells. The paper reports the investigation of four high bandgap tunnel junctions grown by metal-organic chemical vapor deposition.

    5. Towards understanding junction degradation in cadmium telluride solar cells

      SciTech Connect (OSTI)

      Nardone, Marco

      2014-06-21

      A degradation mechanism in cadmium telluride (CdTe/CdS) solar cells is investigated using time-dependent numerical modeling to simulate various temperature, bias, and illumination stress conditions. The physical mechanism is based on defect generation rates that are proportional to nonequilibrium charge carrier concentrations. It is found that a commonly observed degradation mode for CdTe/CdS solar cells can be reproduced only if defects are allowed to form in a narrow region of the absorber layer close to the CdTe/CdS junction. A key aspect of this junction degradation is that both mid-gap donor and shallow acceptor-type defects must be generated simultaneously in response to photo-excitation or applied bias. The numerical approach employed here can be extended to study other mechanisms for any photovoltaic technology.

    6. Grain boundary and triple junction diffusion in nanocrystalline copper

      SciTech Connect (OSTI)

      Wegner, M. Leuthold, J.; Peterlechner, M.; Divinski, S. V.; Song, X.; Wilde, G.

      2014-09-07

      Grain boundary and triple junction diffusion in nanocrystalline Cu samples with grain sizes, ?d?, of ?35 and ?44?nm produced by spark plasma sintering were investigated by the radiotracer method using the {sup 63}Ni isotope. The measured diffusivities, D{sub eff}, are comparable with those determined previously for Ni grain boundary diffusion in well-annealed, high purity, coarse grained, polycrystalline copper, substantiating the absence of a grain size effect on the kinetic properties of grain boundaries in a nanocrystalline material at grain sizes d???35?nm. Simultaneously, the analysis predicts that if triple junction diffusion of Ni in Cu is enhanced with respect to the corresponding grain boundary diffusion rate, it is still less than 500?D{sub gb} within the temperature interval from 420?K to 470?K.

    7. Junction Transport in Epitaxial Film Silicon Heterojunction Solar Cells

      SciTech Connect (OSTI)

      Young, D. L.; Li, J. V.; Teplin, C. W.; Stradins, P.; Branz, H. M.

      2011-01-01

      We report our progress toward low-temperature HWCVD epitaxial film silicon solar cells on inexpensive seed layers, with a focus on the junction transport physics exhibited by our devices. Heterojunctions of i/p hydrogenated amorphous Si (a-Si) on our n-type epitaxial crystal Si on n{sup ++} Si wafers show space-charge-region recombination, tunneling or diffusive transport depending on both epitaxial Si quality and the applied forward voltage.

    8. Junction Transport in Epitaxial Film Silicon Heterojunction Solar Cells: Preprint

      SciTech Connect (OSTI)

      Young, D. L.; Li, J. V.; Teplin, C. W.; Stradins, P.; Branz, H. M.

      2011-07-01

      We report our progress toward low-temperature HWCVD epitaxial film silicon solar cells on inexpensive seed layers, with a focus on the junction transport physics exhibited by our devices. Heterojunctions of i/p hydrogenated amorphous Si (a-Si) on our n-type epitaxial crystal Si on n++ Si wafers show space-charge-region recombination, tunneling or diffusive transport depending on both epitaxial Si quality and the applied forward voltage.

    9. Fractional quantum Hall junctions and two-channel Kondo models

      SciTech Connect (OSTI)

      Sandler, Nancy P.; Fradkin, Eduardo

      2001-06-15

      A mapping between fractional quantum Hall (FQH) junctions and the two-channel Kondo model is presented. We discuss this relation in detail for the particular case of a junction of a FQH state at {nu}=1/3 and a normal metal. We show that in the strong coupling regime this junction has a non-Fermi-liquid fixed point. At this fixed point the electron Green{close_quote}s function has a branch cut and the impurity entropy is equal to S=1/2ln2. We construct the space of perturbations at the strong coupling fixed point and find that the dimension of the tunneling operator is 1/2. These properties are strongly reminiscent of the non-Fermi-liquid fixed points of a number of quantum impurity models, particularly the two-channel Kondo model. However we have found that, in spite of these similarities, the Hilbert spaces of these two systems are quite different. In particular, although in a special limit the Hamiltonians of both systems are the same, their Hilbert spaces are not since they are determined by physically distinct boundary conditions. As a consequence the spectrum of operators in the two problems is different.

    10. Joint measurement of current-phase relations and transport properties of hybrid junctions using a three junctions superconducting quantum interference device

      SciTech Connect (OSTI)

      Basset, J.; Delagrange, R.; Weil, R.; Kasumov, A.; Bouchiat, H.; Deblock, R.

      2014-07-14

      We propose a scheme to measure both the current-phase relation and differential conductance dI/dV of a superconducting junction, in the normal and the superconducting states. This is done using a dc Superconducting Quantum Interference Device with two Josephson junctions in parallel with the device under investigation and three contacts. As a demonstration, we measure the current-phase relation and dI/dV of a small Josephson junction and a carbon nanotube junction. In this latter case, in a regime where the nanotube is well conducting, we show that the non-sinusoidal current phase relation we find is consistent with the theory for a weak link, using the transmission extracted from the differential conductance in the normal state. This method holds great promise for future investigations of the current-phase relation of more exotic junctions.

    11. Process For Direct Integration Of A Thin-Film Silicon P-N Junction Diode With A Magnetic Tunnel Junction

      DOE Patents [OSTI]

      Toet, Daniel (Mountain View, CA); Sigmon, Thomas W. (Albuquerque, NM)

      2005-08-23

      A process for direct integration of a thin-film silicon p-n junction diode with a magnetic tunnel junction for use in advanced magnetic random access memory (MRAM) cells for high performance, non-volatile memory arrays. The process is based on pulsed laser processing for the fabrication of vertical polycrystalline silicon electronic device structures, in particular p-n junction diodes, on films of metals deposited onto low temperature-substrates such as ceramics, dielectrics, glass, or polymers. The process preserves underlayers and structures onto which the devices are typically deposited, such as silicon integrated circuits. The process involves the low temperature deposition of at least one layer of silicon, either in an amorphous or a polycrystalline phase on a metal layer. Dopants may be introduced in the silicon film during or after deposition. The film is then irradiated with short pulse laser energy that is efficiently absorbed in the silicon, which results in the crystallization of the film and simultaneously in the activation of the dopants via ultrafast melting and solidification. The silicon film can be patterned either before or after crystallization.

    12. Process for direct integration of a thin-film silicon p-n junction diode with a magnetic tunnel junction

      DOE Patents [OSTI]

      Toet, Daniel; Sigmon, Thomas W.

      2004-12-07

      A process for direct integration of a thin-film silicon p-n junction diode with a magnetic tunnel junction for use in advanced magnetic random access memory (MRAM) cells for high performance, non-volatile memory arrays. The process is based on pulsed laser processing for the fabrication of vertical polycrystalline silicon electronic device structures, in particular p-n junction diodes, on films of metals deposited onto low temperature-substrates such as ceramics, dielectrics, glass, or polymers. The process preserves underlayers and structures onto which the devices are typically deposited, such as silicon integrated circuits. The process involves the low temperature deposition of at least one layer of silicon, either in an amorphous or a polycrystalline phase on a metal layer. Dopants may be introduced in the silicon film during or after deposition. The film is then irradiated with short pulse laser energy that is efficiently absorbed in the silicon, which results in the crystallization of the film and simultaneously in the activation of the dopants via ultrafast melting and solidification. The silicon film can be patterned either before or after crystallization.

    13. Process for direct integration of a thin-film silicon p-n junction diode with a magnetic tunnel junction

      DOE Patents [OSTI]

      Toet, Daniel (Mountain View, CA); Sigmon, Thomas W. (Albuquerque, NM)

      2003-01-01

      A process for direct integration of a thin-film silicon p-n junction diode with a magnetic tunnel junction for use in advanced magnetic random access memory (MRAM) cells for high performance, non-volatile memory arrays. The process is based on pulsed laser processing for the fabrication of vertical polycrystalline silicon electronic device structures, in particular p-n junction diodes, on films of metals deposited onto low temperature-substrates such as ceramics, dielectrics, glass, or polymers. The process preserves underlayers and structures onto which the devices are typically deposited, such as silicon integrated circuits. The process involves the low temperature deposition of at least one layer of silicon, either in an amorphous or a polycrystalline phase on a metal layer. Dopants may be introduced in the silicon film during or after deposition. The film is then irradiated with short pulse laser energy that is efficiently absorbed in the silicon, which results in the crystallization of the film and simultaneously in the activation of the dopants via ultrafast melting and solidification. The silicon film can be patterned either before or after crystallization.

    14. Shunt-capacitor-assisted synchronization of oscillations in intrinsic Josephson junctions stack.

      SciTech Connect (OSTI)

      Martin, I.; Halasz, G. B.; Bulaevskii, L. N.; Koshelev, A. E.; Materials Science Division; LANL

      2010-08-06

      We show that a shunt capacitor, by coupling each Josephson junction to all the other junctions, stabilizes synchronized oscillations in an intrinsic Josephson junction stack biased by a dc current. This synchronization mechanism is similar to the previously discussed radiative coupling between junctions, however, it is not defined by the geometry of the stack. It is particularly important in crystals with smaller numbers of junctions (where the radiation coupling is weak), and is comparable with the effect of strong super-radiation in crystals with many junctions. The shunt also helps to enter the phase-locked regime in the beginning of the oscillations, after switching on the bias current. Furthermore, it may be used to tune radiation power, which drops as the shunt capacitance increases.

    15. Voltage dependence of the differential capacitance of a p{sup +}-n junction

      SciTech Connect (OSTI)

      Shekhovtsov, N. A.

      2013-04-15

      The dependences of the differential capacitance and current of a p{sup +}-n junction with a uniformly doped n region on the voltage in the junction region are calculated. The p{sup +}-n junction capacitance controls the charge change in the junction region taking into account a change in the electric field of the quasi-neutral n region and a change in its bipolar drift mobility with increasing excess charge-carrier concentration. It is shown that the change in the sign of the p{sup +}-n junction capacitance with increasing injection level is caused by a decrease in the bipolar drift mobility as the electron-hole pair concentration in the n region increases. It is shown that the p{sup +}-n junction capacitance decreases with increasing reverse voltage and tends to a constant positive value.

    16. Natural Gas Wells Near Project Rulison

      Office of Legacy Management (LM)

      for Natural Gas Wells Near Project Rulison Second Quarter 2013 U.S. Department of Energy Office of Legacy Management Grand Junction, Colorado Date Sampled: April 3, 2013 Background: Project Rulison was the second underground nuclear test under the Plowshare Program to stimulate natural-gas recovery from deep, low-permeability formations. On September 10, 1969, a 40-kiloton-yield nuclear device was detonated 8,426 feet (1.6 miles) below the ground surface in the Williams Fork Formation, at what

    17. Students from Grand Junction High School Triumph in Colorado Science Bowl

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      Grand Junction High School Triumph in Colorado Science Bowl For more information contact: e:mail: Public Affairs Golden, Colo., Feb. 12, 2000 - Students from Grand Junction High School won top honors at the Colorado Science Bowl today at the Colorado School of Mines in Golden. In the final round of rapid-fire questions about physics, math, biology, astronomy, chemistry, computers and the earth sciences, students from Grand Junction were victorious over one of two teams from Douglas County High

    18. Hetero-junctions of Boron Nitride and Carbon Nanotubes: Synthesis and

      Office of Scientific and Technical Information (OSTI)

      Characterization (Technical Report) | SciTech Connect Hetero-junctions of Boron Nitride and Carbon Nanotubes: Synthesis and Characterization Citation Details In-Document Search Title: Hetero-junctions of Boron Nitride and Carbon Nanotubes: Synthesis and Characterization Hetero-junctions of boron nitride nanotubes (BNNTs) and carbon nanotubes (CNTs) are expected to have appealing new properties that are not available from pure BNNTs and CNTs. Theoretical studies indicate that BNNT/CNT

    19. Grand Junction, Colorado, Disposal Site Long-Term Surveillance and Maintenance Program Fact Sheet, July 2001

      Office of Legacy Management (LM)

      Grand Junction Disposal Site Uranium ore was processed at the Climax millsite at Grand Junction, Colorado, between 1951 and 1970. The milling operations created process-related waste and tailings, a sandlike material containing radioactive materials and other contaminants. The tailings were an ideal and inexpensive construction material suitable for concrete, mortar, and fill. Accordingly, the tailings were widely used in the Grand Junction area for these purposes. The U.S. Department of Energy

    20. Monitoring of the Airport Calibration Pads at Walker Field, Grand Junction,

      Office of Environmental Management (EM)

      Colorado, for Long-Term Radiation Variations (August 1978) | Department of Energy of the Airport Calibration Pads at Walker Field, Grand Junction, Colorado, for Long-Term Radiation Variations (August 1978) Monitoring of the Airport Calibration Pads at Walker Field, Grand Junction, Colorado, for Long-Term Radiation Variations (August 1978) Monitoring of the Airport Calibration Pads at Walker Field, Grand Junction, Colorado, for Long-Term Radiation Variations (August 1978) PDF icon Monitoring

    1. NREL and CSEM Jointly Set New Efficiency Record with Dual-Junction...

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      NREL and CSEM Jointly Set New Efficiency Record with Dual-Junction Solar Cell January 5, 2016 Scientists at the Energy Department's National Renewable Energy Laboratory (NREL) and...

    2. Enhancement of tunnel magnetoresistance in magnetic tunnel junction by a superlattice barrier

      SciTech Connect (OSTI)

      Chen, C. H.; Hsueh, W. J.

      2014-01-27

      Tunnel magnetoresistance of magnetic tunnel junction improved by a superlattice barrier composed of alternate layers of a nonmagnetic metal and an insulator is proposed. The forbidden band of the superlattice is used to predict the low transmission range in the superlattice barrier. By forbidding electron transport in the anti-parallel configuration, the tunnel magnetoresistance is enhanced in the superlattice junction. The results show that the tunnel magnetoresistance ratio for a superlattice magnetic tunnel junction is greater than that for traditional single or double barrier junctions.

    3. Engineering ferroelectric tunnel junctions through potential profile shaping

      SciTech Connect (OSTI)

      Boyn, S.; Garcia, V. Fusil, S.; Carrtro, C.; Garcia, K.; Collin, S.; Deranlot, C.; Bibes, M.; Barthlmy, A.

      2015-06-01

      We explore the influence of the top electrode materials (W, Co, Ni, Ir) on the electronic band profile in ferroelectric tunnel junctions based on super-tetragonal BiFeO{sub 3}. Large variations of the transport properties are observed at room temperature. In particular, the analysis of current vs. voltage curves by a direct tunneling model indicates that the metal/ferroelectric interfacial barrier height increases with the top-electrode work function. While larger metal work functions result in larger OFF/ON ratios, they also produce a large internal electric field which results in large and potentially destructive switching voltages.

    4. Research Projects

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      LaboratoryNational Security Education Center Menu NSEC Educational Programs Los Alamos Dynamics Summer School Science of Signatures Advanced Studies Institute Judicial Science School SHM Data Sets and Software Research Projects Current Projects Past Projects Publications NSEC » Engineering Institute » Research Projects » Joint Los Alamos National Laboratory/UCSD research projects Past Research Projects Previous collaborations between Los Alamos National Laboratory and the University of

    5. Research Projects

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      Current Research Projects Joint Los Alamos National LaboratoryUCSD Research Projects Collaborations between Los Alamos National Laboratory and the University of California at San...

    6. Project Management

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      Project Management Project Management MaRIE is the experimental facility needed to control the time-dependent properties of materials for national security science missions. It...

    7. Project Accounts

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      Project Accounts Project Accounts A redirector page has been set up without anywhere to redirect to. Last edited: 2016-02-01 08:06:53

    8. Microsoft Word - U0181000-June 2003.doc

      Office of Legacy Management (LM)

      for the U.S. Department of Energy Approved for public release; distribution is unlimited. GJO-2003-445-TAC GJO-GW SHP 10.6.2-1 Ground Water Remediation System Operations, Monitoring, and Maintenance Procedures Shiprock, New Mexico June 2003 U0181000 GJO-2003-445-TAC GJO-GWSHP 10.6.2-1 UMTRA Ground Water Project Ground Water Remediation System Operations, Monitoring, and Maintenance Procedures Shiprock, New Mexico June 2003 Prepared by U.S. Department of Energy Grand Junction Office Grand

    9. EA-1458: Finding of No Significant Impact | Department of Energy

      Office of Environmental Management (EM)

      8: Finding of No Significant Impact EA-1458: Finding of No Significant Impact Ground Water Compliance at the Slick Rock, Colorado, UMTRA Project Sites The U.S. Department of Energy (DOE) plans to implement ground water compliance strategies for two Uranium Mill Tailings Remedial Action (UMTRA) Project sites near Slick Rock. Colorado. PDF icon Finding of No Significant Impact Ground Water Compliance at the Slick Rock, Colorado, UMTRA Project Sites More Documents & Publications EA-1458:

    10. Inverted GaInP/(In)GaAs/InGaAs Triple-Junction Solar Cells with Low-Stress Metamorphic Bottom Junctions: Preprint

      SciTech Connect (OSTI)

      Geisz, J. F.; Kurtz, S. R.; Wanlass, M. W.; Ward, J. S.; Duda, A.; Friedman, D. J.; Olson, J. M.; McMahon, W. E.; Moriarty, T. E.; Kiehl, J. T.; Romero, M. J.; Norman, A. G.; Jones, K. M.

      2008-05-01

      We demonstrate high efficiency performance in two ultra-thin, Ge-free III-V semiconductor triple-junction solar cell device designs grown in an inverted configuration. Low-stress metamorphic junctions were engineered to achieve excellent photovoltaic performance with less than 3 x 106 cm-2 threading dislocations. The first design with band gaps of 1.83/1.40/1.00 eV, containing a single metamorphic junction, achieved 33.8% and 39.2% efficiencies under the standard one-sun global spectrum and concentrated direct spectrum at 131 suns, respectively. The second design with band gaps of 1.83/1.34/0.89 eV, containing two metamorphic junctions achieved 33.2% and 40.1% efficiencies under the standard one-sun global spectrum and concentrated direct spectrum at 143 suns, respectively.

    11. Project Controls

      Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

      1997-03-28

      Project controls are systems used to plan, schedule, budget, and measure the performance of a project/program. The cost estimation package is one of the documents that is used to establish the baseline for project controls. This chapter gives a brief description of project controls and the role the cost estimation package plays.

    12. DOE Moab Project Safely Removes 7 Million Tons of Mill Tailings |

      Office of Environmental Management (EM)

      Department of Energy Moab Project Safely Removes 7 Million Tons of Mill Tailings DOE Moab Project Safely Removes 7 Million Tons of Mill Tailings July 30, 2014 - 12:00pm Addthis View of the Crescent Junction disposal cell, looking northwest. From center left to right, the photo shows final cover, interim cover, tailings, and excavated cell ready to be filled. View of the Crescent Junction disposal cell, looking northwest. From center left to right, the photo shows final cover, interim cover,

    13. Low temperature junction growth using hot-wire chemical vapor deposition

      DOE Patents [OSTI]

      Wang, Qi; Page, Matthew; Iwaniczko, Eugene; Wang, Tihu; Yan, Yanfa

      2014-02-04

      A system and a process for forming a semi-conductor device, and solar cells (10) formed thereby. The process includes preparing a substrate (12) for deposition of a junction layer (14); forming the junction layer (14) on the substrate (12) using hot wire chemical vapor deposition; and, finishing the semi-conductor device.

    14. Project Information

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      Project Information Slider award map The REE Program funds projects focused on developing economically feasible and environmentally benign technologies for recovering REEs from coal and/or coal by-products. Project Information The listed projects represent the current REE program portfolio. Agreement Number Project Title Performer Name FWP-ORD REE FY2016-2020 Rare Earth Elements (REE) from Coal and Coal By-Products National Energy Technology Laboratory

    15. Imaging the p-n junction in a gallium nitride nanowire with a scanning microwave microscope

      SciTech Connect (OSTI)

      Imtiaz, Atif; Wallis, Thomas M.; Brubaker, Matt D.; Blanchard, Paul T.; Bertness, Kris A.; Sanford, Norman A.; Kabos, Pavel; Weber, Joel C.; Coakley, Kevin J.

      2014-06-30

      We used a broadband, atomic-force-microscope-based, scanning microwave microscope (SMM) to probe the axial dependence of the charge depletion in a p-n junction within a gallium nitride nanowire (NW). SMM enables the visualization of the p-n junction location without the need to make patterned electrical contacts to the NW. Spatially resolved measurements of S{sub 11}{sup ?}, which is the derivative of the RF reflection coefficient S{sub 11} with respect to voltage, varied strongly when probing axially along the NW and across the p-n junction. The axial variation in S{sub 11}{sup ?}? effectively mapped the asymmetric depletion arising from the doping concentrations on either side of the junction. Furthermore, variation of the probe tip voltage altered the apparent extent of features associated with the p-n junction in S{sub 11}{sup ?} images.

    16. Dislocation Dynamics Simulations of Junctions in Hexagonal Close-Packed Crystals

      SciTech Connect (OSTI)

      Wu, C; Aubry, S; Chung, P; Arsenlis, A

      2011-12-05

      The formation and strength of dislocations in the hexagonal closed packed material beryllium are studied through dislocation junctions and the critical stress required to break them. Dislocation dynamics calculations (using the code ParaDiS) of junction maps are compared to an analytical line tension approximation in order to validate our model. Results show that the two models agree very well. Also the critical shear stress necessary to break 30{sup o} - 30{sup o} and 30{sup o} - 90{sup o} dislocation junctions is computed numerically. Yield surfaces are mapped out for these junctions to describe their stability regions as function of resolved shear stresses on the glide planes. The example of two non-coplanar binary dislocation junctions with slip planes [2-1-10] (01-10) and [-12-10] (0001) corresponding to a prismatic and basal slip respectively is chosen to verify and validate our implementation.

    17. Moab Mill Tailings Pile 25 Percent Disposed: DOE Moab Project Reaches

      Office of Environmental Management (EM)

      Significant Milestone | Department of Energy Pile 25 Percent Disposed: DOE Moab Project Reaches Significant Milestone Moab Mill Tailings Pile 25 Percent Disposed: DOE Moab Project Reaches Significant Milestone June 3, 2011 - 12:00pm Addthis Media Contacts Donald Metzler Moab Federal Project Director (970) 257-2115 Wendee Ryan S&K Aerospace Public Affairs Manager (970) 257-2145 Grand Junction, CO - One quarter of the uranium mill tailings pile located in Moab, Utah, has been relocated to

    18. EIS-0198: Record of Decision | Department of Energy

      Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

      8: Record of Decision EIS-0198: Record of Decision Uranium Mill Tailings Remedial Action (UMTRA) Ground Water Project (April 1997) The Department of Energy (DOE) is issuing this...

    19. Dispersion mechanisms of a tidal river junction in the Sacramento–San Joaquin Delta, California

      DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

      Gleichauf, Karla T.; Wolfram, Philip J.; Monsen, Nancy E.; Fringer, Oliver B.; Monismith, Stephen G.

      2014-12-17

      In branching channel networks, such as in the Sacramento–San Joaquin River Delta, junction flow dynamics contribute to dispersion of ecologically important entities such as fish, pollutants, nutrients, salt, sediment, and phytoplankton. Flow transport through a junction largely arises from velocity phasing in the form of divergent flow between junction channels for a portion of the tidal cycle. Field observations in the Georgiana Slough junction, which is composed of the North and South Mokelumne rivers, Georgiana Slough, and the Mokelumne River, show that flow phasing differences between these rivers arise from operational, riverine, and tidal forcing. A combination of Acoustic Dopplermore » Current Profile (ADCP) boat transecting and moored ADCPs over a spring–neap tidal cycle (May to June 2012) monitored the variability of spatial and temporal velocity, respectively. Two complementary drifter studies enabled assessment of local transport through the junction to identify small-scale intrajunction dynamics. We supplemented field results with numerical simulations using the SUNTANS model to demonstrate the importance of phasing offsets for junction transport and dispersion. Different phasing of inflows to the junction resulted in scalar patchiness that is characteristic of MacVean and Stacey’s (2011) advective tidal trapping. Furthermore, we observed small-scale junction flow features including a recirculation zone and shear layer, which play an important role in intra-junction mixing over time scales shorter than the tidal cycle (i.e., super-tidal time scales). Thus, the study period spanned open- and closed-gate operations at the Delta Cross Channel. Synthesis of field observations and modeling efforts suggest that management operations related to the Delta Cross Channel can strongly affect transport in the Delta by modifying the relative contributions of tidal and riverine flows, thereby changing the junction flow phasing.« less

    20. Dispersion mechanisms of a tidal river junction in the SacramentoSan Joaquin Delta, California

      SciTech Connect (OSTI)

      Gleichauf, Karla T.; Wolfram, Philip J.; Monsen, Nancy E.; Fringer, Oliver B.; Monismith, Stephen G.

      2014-12-17

      In branching channel networks, such as in the SacramentoSan Joaquin River Delta, junction flow dynamics contribute to dispersion of ecologically important entities such as fish, pollutants, nutrients, salt, sediment, and phytoplankton. Flow transport through a junction largely arises from velocity phasing in the form of divergent flow between junction channels for a portion of the tidal cycle. Field observations in the Georgiana Slough junction, which is composed of the North and South Mokelumne rivers, Georgiana Slough, and the Mokelumne River, show that flow phasing differences between these rivers arise from operational, riverine, and tidal forcing. A combination of Acoustic Doppler Current Profile (ADCP) boat transecting and moored ADCPs over a springneap tidal cycle (May to June 2012) monitored the variability of spatial and temporal velocity, respectively. Two complementary drifter studies enabled assessment of local transport through the junction to identify small-scale intrajunction dynamics. We supplemented field results with numerical simulations using the SUNTANS model to demonstrate the importance of phasing offsets for junction transport and dispersion. Different phasing of inflows to the junction resulted in scalar patchiness that is characteristic of MacVean and Staceys (2011) advective tidal trapping. Furthermore, we observed small-scale junction flow features including a recirculation zone and shear layer, which play an important role in intra-junction mixing over time scales shorter than the tidal cycle (i.e., super-tidal time scales). Thus, the study period spanned open- and closed-gate operations at the Delta Cross Channel. Synthesis of field observations and modeling efforts suggest that management operations related to the Delta Cross Channel can strongly affect transport in the Delta by modifying the relative contributions of tidal and riverine flows, thereby changing the junction flow phasing.

    1. Laboratory instrumentation and techniques for characterizing multi-junction solar cells for space applications

      SciTech Connect (OSTI)

      Woodyard, J.R.

      1995-10-01

      Multi-junction solar cells are attractive for space applications because they can be designed to convert a larger fraction of AMO into electrical power at a lower cost than single-junction cells. The performance of multi-junction cells is much more sensitive to the spectral irradiance of the illuminating source than single-junction cells. The design of high efficiency multi-junction cells for space applications requires matching the optoelectronic properties of the junctions to AMO spectral irradiance. Unlike single-junction cells, it is not possible to carry out quantum efficiency measurements using only a monochromatic probe beam and determining the cell short-circuit current assuming linearity of the quantum efficiency. Additionally, current-voltage characteristics can not be calculated from measurements under non-AMO light sources using spectral-correction methods. There are reports in the literature on characterizing the performance of multi junction cells by measuring and convoluting the quantum efficiency of each junction with the spectral irradiance; the technique is of limited value for the characterization of cell performance under AMO power-generating conditions. The authors report the results of research to develop instrumentation and techniques for characterizing multi junction solar cells for space . An integrated system is described which consists of a standard lamp, spectral radiometer, dual-source solar simulator, and personal computer based current-voltage and quantum efficiency equipment. The spectral radiometer is calibrated regularly using the tungsten-halogen standard lamp which has a calibration based on NIST scales. The solar simulator produces the light bias beam for current-voltage and cell quantum efficiency measurements. The calibrated spectral radiometer is used to `fit` the spectral irradiance of the dual-source solar simulator to WRL AMO data.

    2. Laser annealing of ion implanted CZ silicon for solar cell junction formation. Quarterly report No. 1

      SciTech Connect (OSTI)

      Katzeff, J. S.

      1980-07-01

      A project to evaluate the merits of large spot size pulsed laser annealing of ion implanted silicon wafers for junction formation on solar cells is described. A Q-switched Nd:Glass laser system is used operating in the 1064 (regular) and 532 (with frequency doubler) nm wavelengths. The laser output is in excess of 30 joules with a 20 to 50 ns pulse duration. Material used in this investigation is 3-inch diameter CZ silicon, P-type 0.014 inches thick, 10..cap omega..-cm resistivity, <100> orientation. Three wafer surface conditions are being evaluated in this pulse annealing investigation: chem-polished, texture etched, and flash etched. Annealing was performed with and without beam homogenization. Both modes showed excellent lattice recovery from the implant-induced damage as analyzed using Rutherford backscattering techniques. Homogenization of the beam was performed using a fused silica rod configured with a 90/sup 0/ bend. The unhomogenized annealing was performed using a plano-concave lens. Fabrication of laser annealed cells using both modes is forthcoming.

    3. Bottom head to shell junction assembly for a boiling water nuclear reactor

      DOE Patents [OSTI]

      Fife, Alex Blair (San Jose, CA); Ballas, Gary J. (San Jose, CA)

      1998-01-01

      A bottom head to shell junction assembly which, in one embodiment, includes an annular forging having an integrally formed pump deck and shroud support is described. In the one embodiment, the annular forging also includes a top, cylindrical shaped end configured to be welded to one end of the pressure vessel cylindrical shell and a bottom, conical shaped end configured to be welded to the disk shaped bottom head. Reactor internal pump nozzles also are integrally formed in the annular forging. The nozzles do not include any internal or external projections. Stubs are formed in each nozzle opening to facilitate welding a pump housing to the forging. Also, an upper portion of each nozzle opening is configured to receive a portion of a diffuser coupled to a pump shaft which extends through the nozzle opening. Diffuser openings are formed in the integral pump deck to provide additional support for the pump impellers. The diffuser opening is sized so that a pump impeller can extend at least partially therethrough. The pump impeller is connected to the pump shaft which extends through the nozzle opening.

    4. Bottom head to shell junction assembly for a boiling water nuclear reactor

      DOE Patents [OSTI]

      Fife, A.B.; Ballas, G.J.

      1998-02-24

      A bottom head to shell junction assembly which, in one embodiment, includes an annular forging having an integrally formed pump deck and shroud support is described. In the one embodiment, the annular forging also includes a top, cylindrical shaped end configured to be welded to one end of the pressure vessel cylindrical shell and a bottom, conical shaped end configured to be welded to the disk shaped bottom head. Reactor internal pump nozzles also are integrally formed in the annular forging. The nozzles do not include any internal or external projections. Stubs are formed in each nozzle opening to facilitate welding a pump housing to the forging. Also, an upper portion of each nozzle opening is configured to receive a portion of a diffuser coupled to a pump shaft which extends through the nozzle opening. Diffuser openings are formed in the integral pump deck to provide additional support for the pump impellers. The diffuser opening is sized so that a pump impeller can extend at least partially therethrough. The pump impeller is connected to the pump shaft which extends through the nozzle opening. 5 figs.

    5. Cooperative Research between NREL and Solar Junction Corp: Cooperative Research and Development Final Report, CRADA Number CRD-08-306

      SciTech Connect (OSTI)

      Friedman, D.

      2015-03-01

      NREL and Solar Junction Corp. will perform cooperative research on materials and devices that are alternatives to standard approaches with the goal of improving solar cell efficiency while lowering cost. The general purpose of this work is to model the performance of a multi-junction concentrator cell of Solar Junction, Inc. design under normal concentrator operating conditions.

    6. Chemical Fabrication of Heterometallic Nanogaps for Molecular Transport Junctions

      SciTech Connect (OSTI)

      Chen, Xiaodong; Yeganeh, Sina; Qin, Lidong; Li, Shuzhou; Xue, Can; Braunschweig, Adam B.; Schatz, George C.; Ratner, Mark A.; Mirkin, Chad A.

      2009-01-01

      We report a simple and reproducible method for fabricating heterometallic nanogaps, which are made of two different metal nanorods separated by a nanometer-sized gap. The method is based upon on-wire lithography, which is a chemically enabled technique used to synthesize a wide variety of nanowire-based structures (e.g., nanogaps and disk arrays). This method can be used to fabricate pairs of metallic electrodes, which exhibit distinct work functions and are separated by gaps as small as 2 nm. Furthermore, we demonstrate that a symmetric thiol-terminated molecule can be assembled into such heterometallic nanogaps to form molecular transport junctions (MTJs) that exhibit molecular diode behavior. Theoretical calculations demonstrate that the coupling strength between gold and sulfur (Au-S) is 2.5 times stronger than that of Pt-S. In addition, the structures form Raman hot spots in the gap, allowing the spectroscopic characterization of the molecules that make up the MTJs.

    7. Line Projects

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      Grand Coulee Transmission Line Replacement Project Hooper Springs McNary-John Day Montana-to-Washington Transmission System Upgrade Project - M2W Olympia-Grand Coulee No. 1...

    8. Project Gnome

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      Project Gnome Double Beta Decay Dark Matter Biology Repository Science Renewable Energy The first underground physics experiment near Carlsbad was Project Gnome, December 10, 1961 Totally unrelated (and many years prior) to WIPP, the Project Gnome detonation was the first U.S. underground nuclear test with the objective of using nuclear explosives for peaceful applications. Project Gnome was intended to provide a detailed understanding of the underground environment created when a nuclear

    9. Improved method of preparing p-i-n junctions in amorphous silicon semiconductors

      DOE Patents [OSTI]

      Madan, A.

      1984-12-10

      A method of preparing p/sup +/-i-n/sup +/ junctions for amorphous silicon semiconductors includes depositing amorphous silicon on a thin layer of trivalent material, such as aluminum, indium, or gallium at a temperature in the range of 200/sup 0/C to 250/sup 0/C. At this temperature, the layer of trivalent material diffuses into the amorphous silicon to form a graded p/sup +/-i junction. A layer of n-type doped material is then deposited onto the intrinsic amorphous silicon layer in a conventional manner to finish forming the p/sup +/-i-n/sup +/ junction.

    10. Realistic-contact-induced enhancement of rectifying in carbon-nanotube/graphene-nanoribbon junctions

      SciTech Connect (OSTI)

      Zhang, Xiang-Hua [School of Physics and Microelectronics Science, Hunan University, Changsha 410082 (China); Department of Electrical and Information Engineering, Hunan Institute of Engineering, Xiangtan 411101 (China); Li, Xiao-Fei, E-mail: xfli@theochem.kth.se [School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054 (China); Wang, Ling-Ling, E-mail: llwang@hnu.edu.cn; Xu, Liang; Luo, Kai-Wu [School of Physics and Microelectronics Science, Hunan University, Changsha 410082 (China)

      2014-03-10

      Carbon-nanotube/graphene-nanoribbon junctions were recently fabricated by the controllable etching of single-walled carbon-nanotubes [Wei et al., Nat. Commun. 4, 1374 (2013)] and their electronic transport properties were studied here. First principles results reveal that the transmission function of the junctions show a heavy dependence on the shape of contacts, but rectifying is an inherent property which is insensitive to the details of contacts. Interestingly, the rectifying ratio is largely enhanced in the junction with a realistic contact and the enhancement is insensitive to the details of contact structures. The stability of rectifying suggests a significant feasibility to manufacture realistic all-carbon rectifiers in nanoelectronics.

    11. SU-E-T-426: Dose Delivery Accuracy in Breast Field Junction for Free Breath

      Office of Scientific and Technical Information (OSTI)

      and Deep Inspiration Breath Hold Techniques (Journal Article) | SciTech Connect SU-E-T-426: Dose Delivery Accuracy in Breast Field Junction for Free Breath and Deep Inspiration Breath Hold Techniques Citation Details In-Document Search Title: SU-E-T-426: Dose Delivery Accuracy in Breast Field Junction for Free Breath and Deep Inspiration Breath Hold Techniques Purpose: The purpose of this work was to verify the accuracy of the dose distribution along the field junction in a half beam

    12. Performance of single-junction and dual-junction InGaP/GaAs solar cells under low concentration ratios

      SciTech Connect (OSTI)

      Khan, Aurangzeb; Yamaguchi, Masafumi; Takamoto, Tatsuya

      2004-10-11

      A study of the performance of single-junction InGaP/GaAs and dual-junction InGaP/GaAs tandem cells under low concentration ratios (up to 15 suns), before and after 1 MeV electron irradiation is presented. Analysis of the tunnel junction parameters under different concentrated light illuminations reveals that the peak current (J{sub P}) and valley current (J{sub V}) densities should be greater than the short-circuit current density (J{sub sc}) for better performance. The tunnel junction behavior against light intensity improved after irradiation. This led to the suggestion that the peak current density (J{sub P}) and valley current density (J{sub V}) of the tunnel junction were enhanced after irradiation or the peak current was shifted to higher concentration. The recovery of the radiation damage under concentrated light illumination conditions suggests that the performance of the InGaP/GaAs tandem solar cell can be enhanced even under low concentration ratios.

    13. PROJECT PROFILE: Enabling High Concentration Photovoltaics with 50%

      Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

      Efficient Solar Cells | Department of Energy Enabling High Concentration Photovoltaics with 50% Efficient Solar Cells PROJECT PROFILE: Enabling High Concentration Photovoltaics with 50% Efficient Solar Cells Funding Opportunity: SuNLaMP SunShot Subprogram: Photovoltaics Location: National Renewable Energy Laboratory, Golden, CO Amount Awarded: $8,000,000 The efficiency and concentration of III-V multi-junction solar cells are essential to reduce the cost of high concentration photovoltaic

    14. Moab Project Exceeds 5 Years of Operations Without Lost-Time Injury, Illness

      Broader source: Energy.gov [DOE]

      GRAND JUNCTION, Colo. – It has been more than five years since workers on the Moab Uranium Mill Tailings Remedial Action Project in Utah had a lost-time injury or illness. This represents roughly 2.2 million hours of safe work.

    15. Moab Project Logs 2 Million Work Hours Without Lost-Time Injury or Illness

      Broader source: Energy.gov [DOE]

      GRAND JUNCTION, Colo. – The number 1,584 may not mean much to most people, but for the workers on EM’s Moab Uranium Mill Tailings Remedial Action Project, it represents the number of days without a work-related, lost-time injury or illness, as defined by the Occupational Safety and Health Administration.

    16. Device characterization for design optimization of 4 junction inverted metamorphic concentrator solar cells

      SciTech Connect (OSTI)

      Geisz, John F.; France, Ryan M.; Steiner, Myles A.; Friedman, Daniel J.; Garca, Ivn

      2014-09-26

      Quantitative electroluminescence (EL) and luminescent coupling (LC) analysis, along with more conventional characterization techniques, are combined to completely characterize the subcell JV curves within a fourjunction (4J) inverted metamorphic solar cell (IMM). The 4J performance under arbitrary spectral conditions can be predicted from these subcell JV curves. The internal radiative efficiency (IRE) of each junction has been determined as a function of current density from the external radiative efficiency using optical modeling, but this required the accurate determination of the individual junction current densities during the EL measurement as affected by LC. These measurement and analysis techniques can be applied to any multijunction solar cell. The 4J IMM solar cell used to illustrate these techniques showed excellent junction quality as exhibited by high IRE and a one-sun AM1.5D efficiency of 36.3%. This device operates up to 1000 suns without limitations due to any of the three tunnel junctions.

    17. Low-bias negative differential resistance effect in armchair graphene nanoribbon junctions

      SciTech Connect (OSTI)

      Li, Suchun; Gan, Chee Kwan; Son, Young-Woo; Feng, Yuan Ping; Quek, Su Ying

      2015-01-05

      Graphene nanoribbons with armchair edges (AGNRs) have bandgaps that can be flexibly tuned via the ribbon width. A junction made of a narrower AGNR sandwiched between two wider AGNR leads was recently reported to possess two perfect transmission channels close to the Fermi level. Here, we report that by using a bias voltage to drive these transmission channels into the gap of the wider AGNR lead, we can obtain a negative differential resistance (NDR) effect. Owing to the intrinsic properties of the AGNR junctions, the on-set bias reaches as low as ?0.2?V and the valley current almost vanishes. We further show that such NDR effect is robust against details of the atomic structure of the junction, substrate, and whether the junction is made by etching or by hydrogenation.

    18. Method And Apparatus For Reducing Sample Dispersion In Turns And Junctions Of Micro-Channel Systems

      DOE Patents [OSTI]

      Griffiths, Stewart K. , Nilson, Robert H.

      2004-05-11

      What is disclosed pertains to improvement in the performance of microchannel devices by providing turns, wyes, tees, and other junctions that produce little dispersion of a sample as it traverses the turn or junction. The reduced dispersion results from contraction and expansion regions that reduce the cross-sectional area over some portion of the turn or junction. By carefully designing the geometries of these regions, sample dispersion in turns and junctions is reduced to levels comparable to the effects of ordinary diffusion. The low dispersion features are particularly suited for microfluidic devices and systems using either electromotive force, pressure, or combinations thereof as the principle of fluid transport. Such microfluidic devices and systems are useful for separation of components, sample transport, reaction, mixing, dilution or synthesis, or combinations thereof.

    19. DOE/Grand Junction Office Bluewater LTSP July 1997 Doc. No. S00012AA, Page iii

      Office of Legacy Management (LM)

      DOE/Grand Junction Office Bluewater LTSP July 1997 Doc. No. S00012AA, Page iii Contents Page 1.0 Introduction .........................................................................................................................................1 1.1 Purpose ................................................................................................................................1 1.2 Legal and Regulatory Requirements

    20. Materials en Multi-junction Solar Cells to Push CPV Efficiencies...

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      ceem.ucsb.edurss News and Events - Center for Energy Efficient Materials en Multi-junction Solar Cells to Push CPV Efficiencies Beyond 50% http:www.compoundsemiconductor.net...

    1. Highly efficient organic multi-junction solar cells with a thiophene based donor material

      SciTech Connect (OSTI)

      Meerheim, Rico Krner, Christian; Leo, Karl

      2014-08-11

      The efficiency of organic solar cells can be increased by serial stacked subcells even upon using the same absorber material. For the multi-junction devices presented here, we use the small molecule donor material DCV5T-Me. The subcell currents were matched by optical transfer matrix simulation, allowing an efficiency increase from 8.3% for a single junction up to 9.7% for a triple junction cell. The external quantum efficiency of the subcells, measured under appropriate light bias illumination, is spectrally shifted due to the microcavity of the complete stack, resulting in a broadband response and an increased cell current. The increase of the power conversion efficiency upon device stacking is even stronger for large area cells due to higher influence of the resistance of the indium tin oxide anode, emphasizing the advantage of multi-junction devices for large-area applications.

    2. Research Projects

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      structure whose behavior is fundamentally nonlinear. Thus, the students assigned to this project will develop control techniques that will allow an electrodynamic shake table to...

    3. Project Construction

      Office of Energy Efficiency and Renewable Energy (EERE)

      Integrating renewable energy into Federal new construction or major renovations requires effective structuring of the construction team and project schedule. This overview discusses key construction team considerations for renewable energy as well as timing and expectations for the construction phase. The project construction phase begins after a project is completely designed and the construction documents (100%) have been issued. Construction team skills and experience with renewable energy technologies are crucial during construction, as is how the integration of renewable energy affects the project construction schedule.

    4. project management

      National Nuclear Security Administration (NNSA)

      3%2A en Project Management and Systems Support http:www.nnsa.energy.govaboutusouroperationsapmprojectmanagementandsystemssupport

    5. Custom Projects

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      Energy Management Small Industrial Lighting Compressed Air ESUE Motors Federal Agriculture Custom Projects No two industrial customers are alike; each has its own unique...

    6. project management

      National Nuclear Security Administration (NNSA)

      %2A en Project Management and Systems Support http:nnsa.energy.govaboutusouroperationsapmprojectmanagementandsystemssupport

    7. Project Tour

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      Project Tour Transportation Transportation to the tour will be provided from Hilton Santa Fe Buffalo Thunder to Los Alamos National Laboratory, Technical Area 55. After the...

    8. Project Complete

      Broader source: Energy.gov [DOE]

      DOE has published its Record of Decision announcing and explaining DOEs chosen project alternative and describing any commitments for mitigating potential environmental impacts. The NEPA process...

    9. Phase diagram of Josephson junction between s and s ± superconductors in

      Office of Scientific and Technical Information (OSTI)

      the dirty limit (Journal Article) | DOE PAGES Publisher's Accepted Manuscript: Phase diagram of Josephson junction between s and s ± superconductors in the dirty limit Title: Phase diagram of Josephson junction between s and s ± superconductors in the dirty limit Authors: Koshelev, A. E. Publication Date: 2012-12-05 OSTI Identifier: 1102475 Type: Publisher's Accepted Manuscript Journal Name: Physical Review B Additional Journal Information: Journal Volume: 86; Journal Issue: 21; Journal

    10. Single-junction solar cells with the optimum band gap for terrestrial concentrator applications

      DOE Patents [OSTI]

      Wanlass, Mark W. (Golden, CO)

      1994-01-01

      A single-junction solar cell having the ideal band gap for terrestrial concentrator applications. Computer modeling studies of single-junction solar cells have shown that the presence of absorption bands in the direct spectrum has the effect of "pinning" the optimum band gap for a wide range of operating conditions at a value of 1.14.+-.0.02 eV. Efficiencies exceeding 30% may be possible at high concentration ratios for devices with the ideal band gap.

    11. 0.7-eV GaInAs Junction for a GaInP/GaAs/GaInAs(1eV)/GaInAs(0.7eV) Four-Junction Solar Cell

      SciTech Connect (OSTI)

      Friedman, D. J.; Geisz, J. F.; Norman, A. G.; Wanlass, M. W.; Kurtz, S. R.

      2006-01-01

      We discuss recent developments in III-V multijunction solar cells, focusing on adding a fourth junction to the Ga{sub 0.5}In{sub 0.5} P/GaAs/Ga{sub 0.75}In{sub 0.25}As inverted three-junction cell. This cell, grown inverted on GaAs so that the lattice-mismatched Ga{sub 0.75}In{sub 0.25}As third junction is the last one grown, has demonstrated 38% efficiency, and 40% is likely in the near future. To achieve still further gains, a lower-bandgap Ga{sub x}In{sub 1-x}As fourth junction could be added to the three-junction structure for a four-junction cell whose efficiency could exceed 45% under concentration. Here, we present the initial development of the Ga{sub x}In{sub 1-x}As fourth junction. Junctions of various bandgaps ranging from 0.88 to 0.73 eV were grown, in order to study the effect of the different amounts of lattice mismatch. At a bandgap of 0.88 eV, junctions were obtained with very encouraging {approx}80% quantum efficiency, 57% fill factor, and 0.36 eV open-circuit voltage. The device performance degrades with decreasing bandgap (i.e., increasing lattice mismatch). We model the four-junction device efficiency vs. fourth junction bandgap to show that an 0.7-eV fourth-junction bandgap, while optimal if it could be achieved in practice, is not necessary; an 0.9-eV bandgap would still permit significant gains in multijunction cell efficiency while being easier to achieve than the lower-bandgap junction.

    12. Quantum interference in thermoelectric molecular junctions: A toy model perspective

      SciTech Connect (OSTI)

      Nozaki, Daijiro E-mail: research@nano.tu-dresden.de; Avdoshenko, Stas M.; Sevinçli, Hâldun; Cuniberti, Gianaurelio

      2014-08-21

      Quantum interference (QI) phenomena between electronic states in molecular circuits offer a new opportunity to design new types of molecular devices such as molecular sensors, interferometers, and thermoelectric devices. Controlling the QI effect is a key challenge for such applications. For the development of single molecular devices employing QI effects, a systematic study of the relationship between electronic structure and the quantum interference is needed. In order to uncover the essential topological requirements for the appearance of QI effects and the relationship between the QI-affected line shape of the transmission spectra and the electronic structures, we consider a homogeneous toy model where all on-site energies are identical and model four types of molecular junctions due to their topological connectivities. We systematically analyze their transmission spectra, density of states, and thermoelectric properties. Even without the degree of freedom for on-site energies an asymmetric Fano peak could be realized in the homogeneous systems with the cyclic configuration. We also calculate the thermoelectric properties of the model systems with and without fluctuation of on-site energies. Even under the fluctuation of the on-site energies, the finite thermoelectrics are preserved for the Fano resonance, thus cyclic configuration is promising for thermoelectric applications. This result also suggests the possibility to detect the cyclic configuration in the homogeneous systems and the presence of the QI features from thermoelectric measurements.

    13. Computational Fluid Dynamics Analysis of Flexible Duct Junction Box Design

      SciTech Connect (OSTI)

      Beach, Robert; Prahl, Duncan; Lange, Rich

      2013-12-01

      IBACOS explored the relationships between pressure and physical configurations of flexible duct junction boxes by using computational fluid dynamics (CFD) simulations to predict individual box parameters and total system pressure, thereby ensuring improved HVAC performance. Current Air Conditioning Contractors of America (ACCA) guidance (Group 11, Appendix 3, ACCA Manual D, Rutkowski 2009) allows for unconstrained variation in the number of takeoffs, box sizes, and takeoff locations. The only variables currently used in selecting an equivalent length (EL) are velocity of air in the duct and friction rate, given the first takeoff is located at least twice its diameter away from the inlet. This condition does not account for other factors impacting pressure loss across these types of fittings. For each simulation, the IBACOS team converted pressure loss within a box to an EL to compare variation in ACCA Manual D guidance to the simulated variation. IBACOS chose cases to represent flows reasonably correlating to flows typically encountered in the field and analyzed differences in total pressure due to increases in number and location of takeoffs, box dimensions, and velocity of air, and whether an entrance fitting is included. The team also calculated additional balancing losses for all cases due to discrepancies between intended outlet flows and natural flow splits created by the fitting. In certain asymmetrical cases, the balancing losses were significantly higher than symmetrical cases where the natural splits were close to the targets. Thus, IBACOS has shown additional design constraints that can ensure better system performance.

    14. Electron transfer statistics and thermal fluctuations in molecular junctions

      SciTech Connect (OSTI)

      Goswami, Himangshu Prabal; Harbola, Upendra

      2015-02-28

      We derive analytical expressions for probability distribution function (PDF) for electron transport in a simple model of quantum junction in presence of thermal fluctuations. Our approach is based on the large deviation theory combined with the generating function method. For large number of electrons transferred, the PDF is found to decay exponentially in the tails with different rates due to applied bias. This asymmetry in the PDF is related to the fluctuation theorem. Statistics of fluctuations are analyzed in terms of the Fano factor. Thermal fluctuations play a quantitative role in determining the statistics of electron transfer; they tend to suppress the average current while enhancing the fluctuations in particle transfer. This gives rise to both bunching and antibunching phenomena as determined by the Fano factor. The thermal fluctuations and shot noise compete with each other and determine the net (effective) statistics of particle transfer. Exact analytical expression is obtained for delay time distribution. The optimal values of the delay time between successive electron transfers can be lowered below the corresponding shot noise values by tuning the thermal effects.

    15. High temperature superconductor step-edge Josephson junctions using Ti-Ca-Ba-Cu-O

      DOE Patents [OSTI]

      Ginley, D.S.; Hietala, V.M.; Hohenwarter, G.K.G.; Martens, J.S.; Plut, T.A.; Tigges, C.P.; Vawter, G.A.; Zipperian, T.E.

      1994-10-25

      A process is disclosed for formulating non-hysteretic and hysteretic Josephson junctions using HTS materials which results in junctions having the ability to operate at high temperatures while maintaining high uniformity and quality. The non-hysteretic Josephson junction is formed by step-etching a LaAlO[sub 3] crystal substrate and then depositing a thin film of TlCaBaCuO on the substrate, covering the step, and forming a grain boundary at the step and a subsequent Josephson junction. Once the non-hysteretic junction is formed the next step to form the hysteretic Josephson junction is to add capacitance to the system. In the current embodiment, this is accomplished by adding a thin dielectric layer, LaA1O[sub 3], followed by a cap layer of a normal metal where the cap layer is formed by first depositing a thin layer of titanium (Ti) followed by a layer of gold (Au). The dielectric layer and the normal metal cap are patterned to the desired geometry. 8 figs.

    16. High temperature superconductor step-edge Josephson junctions using Ti-Ca-Ba-Cu-O

      DOE Patents [OSTI]

      Ginley, David S. (Evergreen, CO); Hietala, Vincent M. (Placitas, NM); Hohenwarter, Gert K. G. (Madison, WI); Martens, Jon S. (Sunnyvale, CA); Plut, Thomas A. (Albuquerque, NM); Tigges, Chris P. (Albuquerque, NM); Vawter, Gregory A. (Albuquerque, NM); Zipperian, Thomas E. (Albuquerque, NM)

      1994-10-25

      A process for formulating non-hysteretic and hysteretic Josephson junctions using HTS materials which results in junctions having the ability to operate at high temperatures while maintaining high uniformity and quality. The non-hysteretic Josephson junction is formed by step-etching a LaAlO.sub.3 crystal substrate and then depositing a thin film of TlCaBaCuO on the substrate, covering the step, and forming a grain boundary at the step and a subsequent Josephson junction. Once the non-hysteretic junction is formed the next step to form the hysteretic Josephson junction is to add capacitance to the system. In the current embodiment, this is accomplished by adding a thin dielectric layer, LaA1O.sub.3, followed by a cap layer of a normal metal where the cap layer is formed by first depositing a thin layer of titanium (Ti) followed by a layer of gold (Au). The dielectric layer and the normal metal cap are patterned to the desired geometry.

    17. Method and apparatus for reducing sample dispersion in turns and junctions of microchannel systems

      DOE Patents [OSTI]

      Griffiths, Stewart K.; Nilson, Robert H.

      2001-01-01

      The performance of microchannel devices is improved by providing turns, wyes, tees, and other junctions that produce little dispersions of a sample as it traverses the turn or junction. The reduced dispersion results from contraction and expansion regions that reduce the cross-sectional area over some portion of the turn or junction. By carefully designing the geometries of these regions, sample dispersion in turns and junctions is reduced to levels comparable to the effects of ordinary diffusion. A numerical algorithm was employed to evolve low-dispersion geometries by computing the electric or pressure field within candidate configurations, sample transport through the turn or junction, and the overall effective dispersion. These devices should greatly increase flexibility in the design of microchannel devices by permitting the use of turns and junctions that do not induce large sample dispersion. In particular, the ability to fold electrophoretic and electrochrornatographic separation columns will allow dramatic improvements in the miniaturization of these devices. The low-lispersion devices are particularly suited to electrochromatographic and electrophoretic separations, as well as pressure-driven chromatographic separation. They are further applicable to microfluidic systems employing either electroosrnotic or pressure-driven flows for sample transport, reaction, mixing, dilution or synthesis.

    18. Awarded projects

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      projects Awarded projects 2016 Allocation Awards This page lists the allocation awards for NERSC for the 2016 allocation year (Jan 12, 2016 through Jan 09, 2017). Read More » Previous Year Awards Last edited: 2016-02-01 08:07:34

    19. DOE - Office of Legacy Management -- Project Rio Blanco - CO 0-09

      Office of Legacy Management (LM)

      Rio Blanco - CO 0-09 FUSRAP Considered Sites Site: Project Rio Blanco (CO.0-09) Eliminated from consideration under FUSRAP Designated Name: Not Designated Alternate Name: None Location: ~ 52 miles north of Grand Junction, Co. , Rio Blanco County , Colorado CO.0-09-1 Evaluation Year: 1985 CO.0-09-1 Site Operations: The project was a cooperative research effort undertaken in 1973 between CER Geonuclear Corp, Continental Oil Co (Conoco), and the US Energy Research and Development Administration

    20. Monitoring Results Natural Gas Wells Near Project Rulison

      Office of Legacy Management (LM)

      Natural Gas Wells Near Project Rulison Third Quarter 2013 U.S. Department of Energy Office of Legacy Management Grand Junction, Colorado Date Sampled: June 12, 2013 Background: Project Rulison was the second Plowshare Program test to stimulate natural-gas recovery from deep and low permeability formations. On September 10, 1969, a 40-kiloton-yield nuclear device was detonated 8,426 feet (1.6 miles) below the ground surface in the Williams Fork Formation at what is now the Rulison, Colorado,

    1. RENOTER Project

      Broader source: Energy.gov [DOE]

      Overview of French project on thermoelectric waste heat recovery for cars and trucks with focus on cheap, available, efficient, and sustainable TE materials, as well as efficient material integration and production process.

    2. Research Projects

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      Research Projects Joint Los Alamos National Laboratory/UCSD Research Projects Collaborations between Los Alamos National Laboratory and the University of California at San Diego (UCSD) Jacobs School of Engineering Contact Institute Director Charles Farrar (505) 663-5330 Email UCSD EI Director Michael Todd (858) 534-5951 Professional Staff Assistant Jutta Kayser (505) 663-5649 Email Administrative Assistant Stacy Baker (505) 663-5233 Email "Since 2003, LANL has funded numerous collaborative

    3. Junction Evolution During Fabrication of CdS/CdTe Thin-film PV Solar Cells (Presentation)

      SciTech Connect (OSTI)

      Gessert, T. A.

      2010-09-01

      Discussion of the formation of CdTe thin-film PV junctions and optimization of CdTe thin-film PV solar cells.

    4. Laser processing technique for fabricating series-connected and tandem junction series-connected solar cells into a solar battery

      DOE Patents [OSTI]

      Hanak, Joseph J. (Lawrenceville, NJ)

      1981-01-01

      A method of fabricating series-connected and tandem junction series-connected solar cells into a solar battery with laser scribing.

    5. Increased efficiency in multijunction solar cells through the incorporation of semimetallic ErAs nanoparticles into the tunnel junction

      SciTech Connect (OSTI)

      Zide, J.M.O.; Kleiman-Shwarsctein, A.; Strandwitz, N.C.; Zimmerman, J.D.; Steenblock-Smith, T.; Gossard, A.C.; Forman, A.; Ivanovskaya, A.; Stucky, G.D.

      2006-04-17

      We report the molecular beam epitaxy growth of Al{sub 0.3}Ga{sub 0.7}As/GaAs multijunction solar cells with epitaxial, semimetallic ErAs nanoparticles at the interface of the tunnel junction. The states provided by these nanoparticles reduce the bias required to pass current through the tunnel junction by three orders of magnitude, and therefore drastically reduce the voltage losses in the tunnel junction. We have measured open-circuit voltages which are 97% of the sum of the constituent cells, which result in nearly double the efficiency of our multijunction cell with a conventional tunnel junction.

    6. E-cadherin junction formation involves an active kinetic nucleation process

      DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

      Biswas, Kabir H.; Hartman, Kevin L.; Yu, Cheng -han; Harrison, Oliver J.; Song, Hang; Smith, Adam W.; Huang, William Y. C.; Lin, Wan -Chen; Guo, Zhenhuan; Padmanabhan, Anup; et al

      2015-08-19

      Epithelial (E)-cadherin-mediated cell–cell junctions play important roles in the development and maintenance of tissue structure in multicellular organisms. E-cadherin adhesion is thus a key element of the cellular microenvironment that provides both mechanical and biochemical signaling inputs. Here, we report in vitro reconstitution of junction-like structures between native E-cadherin in living cells and the extracellular domain of E-cadherin in a supported membrane. Junction formation in this hybrid live cell-supported membrane configuration requires both active processes within the living cell and a supported membrane with low E-cad-ECD mobility. The hybrid junctions recruit α-catenin and exhibit remodeled cortical actin. Observations suggest thatmore » the initial stages of junction formation in this hybrid system depend on the trans but not the cis interactions between E-cadherin molecules, and proceed via a nucleation process in which protrusion and retraction of filopodia play a key role.« less

    7. E-cadherin junction formation involves an active kinetic nucleation process

      SciTech Connect (OSTI)

      Biswas, Kabir H.; Hartman, Kevin L.; Yu, Cheng -han; Harrison, Oliver J.; Song, Hang; Smith, Adam W.; Huang, William Y. C.; Lin, Wan -Chen; Guo, Zhenhuan; Padmanabhan, Anup; Troyanovsky, Sergey M.; Dustin, Michael L.; Shapiro, Lawrence; Honig, Barry; Zaidel-Bar, Ronen; Groves, Jay T.

      2015-08-19

      Epithelial (E)-cadherin-mediated cell–cell junctions play important roles in the development and maintenance of tissue structure in multicellular organisms. E-cadherin adhesion is thus a key element of the cellular microenvironment that provides both mechanical and biochemical signaling inputs. Here, we report in vitro reconstitution of junction-like structures between native E-cadherin in living cells and the extracellular domain of E-cadherin in a supported membrane. Junction formation in this hybrid live cell-supported membrane configuration requires both active processes within the living cell and a supported membrane with low E-cad-ECD mobility. The hybrid junctions recruit α-catenin and exhibit remodeled cortical actin. Observations suggest that the initial stages of junction formation in this hybrid system depend on the trans but not the cis interactions between E-cadherin molecules, and proceed via a nucleation process in which protrusion and retraction of filopodia play a key role.

    8. Giant magnetoresistance modulated by magnetic field in graphene p-n junction

      SciTech Connect (OSTI)

      Li, Yuan; Jalil, Mansoor B. A.; Zhou, Guanghui

      2014-11-10

      We investigate the tunneling transport across a graphene p-n junction under the influence of a perpendicular magnetic field (B field). We observe a sideway deflection of the transmission profile, which can be quantitatively explained by invoking the classical Lorentz force. By considering the trajectory of the Dirac fermions along their cyclotron orbits, we analytically derive the incident angles for transmission across the graphene junction under a B field, as well as the critical magnetic field for full suppression of tunneling across the junction. These analytical predictions are consistent with the numerical results obtained via the non-equilibrium Green's function method. A stronger B-field conductance modulation is obtained for a p-n as opposed to an n-n or p-p type graphene junction. The magnetic field also induces a forbidden region of almost zero transmission for electron energy close to the Dirac point, which can be utilized to achieve a giant magnetoresistance effect. Based on our analysis, we devise an optimal magneto-electrical transport modulation, which can potentially realize a giant magnetoresistance effect in graphene p-n junction systems.

    9. Improved tunneling magnetoresistance at low temperature in manganite junctions grown by molecular beam epitaxy

      SciTech Connect (OSTI)

      Werner, R.; Kleiner, R.; Koelle, D.; Petrov, A. Yu.; Davidson, B. A.; Mino, L. Alvarez

      2011-04-18

      We report resistance versus magnetic field measurements for a La{sub 0.65}Sr{sub 0.35}MnO{sub 3}/SrTiO{sub 3}/La{sub 0.65}Sr{sub 0.35}MnO{sub 3} tunnel junction grown by molecular-beam epitaxy, that show a large field window of extremely high tunneling magnetoresistance (TMR) at low temperature. Scanning the in-plane applied field orientation through 360 deg., the TMR shows fourfold symmetry, i.e., biaxial anisotropy, aligned with the crystalline axis but not the junction geometrical long axis. The TMR reaches {approx}1900% at 4 K, corresponding to an interfacial spin polarization of >95% assuming identical interfaces. These results show that uniaxial anisotropy is not necessary for large TMR, and lay the groundwork for future improvements in TMR in manganite junctions.

    10. A versatile optical junction using photonic band-gap guidance and self collimation

      SciTech Connect (OSTI)

      Gupta, Man Mohan; Medhekar, Sarang

      2014-09-29

      We show that it is possible to design two photonic crystal (PC) structures such that an optical beam of desired wavelength gets guided within the line defect of the first structure (photonic band gap guidance) and the same beam gets guided in the second structure by self-collimation. Using two dimensional simulation of a design made of the combination of these two structures, we propose an optical junction that allows for crossing of two optical signals of same wavelength and same polarization with very low crosstalk. Moreover, the junction can be operated at number of frequencies in a wide range. Crossing of multiple beams with very low cross talk is also possible. The proposed junction should be important in future integrated photonic circuits.

    11. Two-band lasing in epitaxially stacked tunnel-junction semiconductor lasers

      SciTech Connect (OSTI)

      Vinokurov, D. A.; Ladugin, M. A.; Lyutetskii, A. V.; Marmalyuk, A. A.; Petrunov, A. N.; Pikhtin, N. A.; Slipchenko, S. O. Sokolova, Z. N.; Stankevich, A. L.; Fetisova, N. V.; Shashkin, I. S.; Averkiev, N. S.; Tarasov, I. S.

      2010-06-15

      Epitaxially stacked tunnel-junction laser hetero structures were grown by hydride metalorganic vapor-phase epitaxy in the system of AlGaAs/GaAs/In GaAs alloys. Based on such structures, mesa stripe lasers with an aperture of 150 s- 7 m were fabricated. The possibility of controlling the lasing wavelength by varying the active region thickness in each tunnel-junction laser structure was demonstrated. Independent two-band lasing at wavelengths of 914 and 925 nm (the difference frequency is 2.3 THz) was achieved at a maximum optical radiation power of 20 W in each band of the epitaxially stacked tunnel-junction semiconductor laser.

    12. DOE Project Scorecards

      Broader source: Energy.gov [DOE]

      DOE Project Scorecards DOEproject scorecards summarize capital asset project performance compared to the current approved baseline.

    13. Cloudnet Project

      DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

      Hogan, Robin

      2008-01-15

      Cloudnet is a research project supported by the European Commission. This project aims to use data obtained quasi-continuously for the development and implementation of cloud remote sensing synergy algorithms. The use of active instruments (lidar and radar) results in detailed vertical profiles of important cloud parameters which cannot be derived from current satellite sensing techniques. A network of three already existing cloud remote sensing stations (CRS-stations) will be operated for a two year period, activities will be co-ordinated, data formats harmonised and analysis of the data performed to evaluate the representation of clouds in four major european weather forecast models.

    14. The PROJECT

      Office of Scientific and Technical Information (OSTI)

      PROJECT Copies of this publication are available while supply lasts from the Office of Scientific and Technical Information P.O. Box 62 Oak Ridge, TN 37831 Attention: Information Services Telephone: (423) 576-8401 Also Available: The United States Department of Energy: A Summary History, 1977-1994 @ Printed with soy ink on recycled paper The PROJECT U N I T E D S T A T E S D E P A R T M E N T O F E N E R G Y F.G. Gosling History Division Executive Secretariat Management and Administration

    15. Cloudnet Project

      DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

      Hogan, Robin

      Cloudnet is a research project supported by the European Commission. This project aims to use data obtained quasi-continuously for the development and implementation of cloud remote sensing synergy algorithms. The use of active instruments (lidar and radar) results in detailed vertical profiles of important cloud parameters which cannot be derived from current satellite sensing techniques. A network of three already existing cloud remote sensing stations (CRS-stations) will be operated for a two year period, activities will be co-ordinated, data formats harmonised and analysis of the data performed to evaluate the representation of clouds in four major european weather forecast models.

    16. A Monolithic Interconnected module with a tunnel Junction for Enhanced Electrical and Optical Performance

      SciTech Connect (OSTI)

      Murray, Christopher Sean; Wilt, David Morgan

      1999-06-30

      An improved thermophotovoltaic (TPV) n/p/n device is provided. Monolithic Interconnected Modules (MIMs), semiconductor devices converting infrared radiation to electricity, have been developed with improved electrical and optical performance. The structure is an n-type emitter on a p-type base with an n-type lateral conduction layer. The incorporation of a tunnel junction and the reduction in the amount of p-type material used results in negligible parasitic absorption, decreased series resistance, increased voltage and increased active area. The novel use of a tunnel junction results in the potential for a TPV device with efficiency greater than 24%.

    17. Semiconductor device PN junction fabrication using optical processing of amorphous semiconductor material

      DOE Patents [OSTI]

      Sopori, Bhushan; Rangappan, Anikara

      2014-11-25

      Systems and methods for semiconductor device PN junction fabrication are provided. In one embodiment, a method for fabricating an electrical device having a P-N junction comprises: depositing a layer of amorphous semiconductor material onto a crystalline semiconductor base, wherein the crystalline semiconductor base comprises a crystalline phase of a same semiconductor as the amorphous layer; and growing the layer of amorphous semiconductor material into a layer of crystalline semiconductor material that is epitaxially matched to the lattice structure of the crystalline semiconductor base by applying an optical energy that penetrates at least the amorphous semiconductor material.

    18. Monolithic interconnected module with a tunnel junction for enhanced electrical and optical performance

      DOE Patents [OSTI]

      Murray, Christopher S. (Bethel Park, PA); Wilt, David M. (Bay Village, OH)

      2000-01-01

      An improved thermophotovoltaic (TPV) n/p/n device is provided. Monolithic Interconnected Modules (MIMS), semiconductor devices converting infrared radiation to electricity, have been developed with improved electrical and optical performance. The structure is an n-type emitter on a p-type base with an n-type lateral conduction layer. The incorporation of a tunnel junction and the reduction in the amount of p-type material used results in negligible parasitic absorption, decreased series resistance, increased voltage and increased active area. The novel use of a tunnel junction results in the potential for a TPV device with efficiency greater than 24%.

    19. NREL and CSEM Jointly Set New Efficiency Record with Dual-Junction Solar

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      Cell | Awards and Honors | NREL NREL and CSEM Jointly Set New Efficiency Record with Dual-Junction Solar Cell January 5, 2016 Scientists at the Energy Department's National Renewable Energy Laboratory (NREL) and at the Swiss Center for Electronics and Microtechnology (CSEM) have jointly set a new world record for converting non-concentrated (1-sun) sunlight into electricity using a dual-junction III-V/Si solar cell. The newly certified record conversion efficiency of 29.8 percent was set

    20. Single-junction solar cells with the optimum band gap for terrestrial concentrator applications

      DOE Patents [OSTI]

      Wanlass, M.W.

      1994-12-27

      A single-junction solar cell is described having the ideal band gap for terrestrial concentrator applications. Computer modeling studies of single-junction solar cells have shown that the presence of absorption bands in the direct spectrum has the effect of ''pinning'' the optimum band gap for a wide range of operating conditions at a value of 1.14[+-]0.02 eV. Efficiencies exceeding 30% may be possible at high concentration ratios for devices with the ideal band gap. 7 figures.

    1. NREL, CSEM Jointly Set New Efficiency Record with Dual-Junction Solar Cell

      SciTech Connect (OSTI)

      2016-01-01

      Scientists set a new world record for converting non-concentrated sunlight into electricity using a dual-junction III-V/Si solar cell. National Renewable Energy Laboratory (NREL) and Swiss Center for Electronics and Microtechnology (CSEM) scientists have collaborated to create a novel tandem solar cell that operates at 29.8% conversion efficiency under non-concentrator (1-sun) conditions. In comparison, the 1-sun efficiency of a silicon (Si) single-junction solar cell is probably still a few years away from converging on its practical limit of about 26%.

    2. Light-splitting photovoltaic system utilizing two dual-junction solar cells

      SciTech Connect (OSTI)

      Xiong, Kanglin; Yang, Hui; Lu, Shulong; Dong, Jianrong; Zhou, Taofei; Wang, Rongxin; Jiang, Desheng

      2010-12-15

      There are many difficulties limiting the further development of monolithic multi-junction solar cells, such as the growth of lattice-mismatched material and the current matching constraint. As an alternative approach, the light-splitting photovoltaic system is investigated intensively in different aspects, including the energy loss mechanism and the choice of energy bandgaps of solar cells. Based on the investigation, a two-dual junction system has been implemented employing lattice-matched GaInP/GaAs and InGaAsP/InGaAs cells grown epitaxially on GaAs and InP substrates, respectively. (author)

    3. PROJECT MANAGEMENT PLANS Project Management Plans

      Office of Environmental Management (EM)

      MANAGEMENT PLANS Project Management Plans  Overview  Project Management Plan Suggested Outline Subjects  Crosswalk between the Suggested PMP Outline Subjects and a Listing of Project Planning Elements  Elements of Deactivation Project Planning  Examples From Project Management Plans Overview The purpose here is to assist project managers and project planners in creating a project plan by providing examples and pointing to information that have been successfully used by others in

    4. Effect of Front-Side Silver Metallization on Underlying n+-p Junction in Multicrystalline Silicon Solar Cells: Preprint

      SciTech Connect (OSTI)

      Jiang, C. S.; Li, Z. G.; Moutinho, H. R.; Liang, L.; Ionkin, A.; Al-Jassim, M. M.

      2012-06-01

      We report on the effect of front-side Ag metallization on the underlying n+-p junction of multicrystalline Si solar cells. The junction quality beneath the contacts was investigated by characterizing the uniformities of the electrostatic potential and doping concentration across the junction, using scanning Kelvin probe force microscopy and scanning capacitance microscopy. We investigated cells with a commercial Ag paste (DuPont PV159) and fired at furnace setting temperatures of 800 degrees, 840 degrees, and 930 degrees C, which results in actual cell temperatures ~100 degrees C lower than the setting temperature and the three cells being under-, optimal-, and over-fired. We found that the uniformity of the junction beneath the Ag contact was significantly degraded by the over-firing, whereas the junction retained good uniformity with the optimal- and under-fire temperatures. Further, Ag crystallites with widely distributed sizes from <100 nm to several ?m were found at the Ag/Si interface of the over-fired cell. Large crystallites were imaged as protrusions into Si deeper than the junction depth. However, the junction was not broken down; instead, it was reformed on the entire front of the crystallite/Si interface. We propose a mechanism of the junction-quality degradation, based on emitter Si melting at the temperature around the Ag-Si eutectic point during firing, and subsequent recrystallization with incorporation of impurities in the Ag paste and with formation of crystallographic defects during quenching.

    5. Microsoft Word - u01493_July2002.doc

      Office of Legacy Management (LM)

      97-TAR MAC-GWSHP1.9 Final Ground Water Compliance Action Plan for Remediation at the Shiprock, New Mexico, UMTRA Site July 2002 U0149300 GJO-2001-297-TAR GWSHP1.9 Final Ground Water Compliance Action Plan for Remediation at the Shiprock, New Mexico, UMTRA Site July 2002 Prepared by U.S. Department of Energy Grand Junction Office Grand Junction, Colorado Work Performed under DOE Contract No. DE-AC13-96GJ87335 This page intentionally left blank Document Number U0149300 Contents DOE/Grand Junction

    6. Uranium Mill Tailings Remedial Action Project Annual Environmental Monitoring Report calendar year 1992: Volume 2

      SciTech Connect (OSTI)

      1993-12-31

      This report contains environmental monitoring information for the following UMTRA sites for the 1992 Calendar Year: Lakeview, OR; Lowman, ID; Mexican Hat, UT; Monument Valley, AZ; Rifle, CO; Riverton, WY; Shiprock, NM; Spook, WY; Tuba City, AZ. Each site report contains a site description, compliance summary, environmental program information, environmental radiological and non-radiological program information, water resources protection, and quality assurance information.

    7. Hydropower Projects

      SciTech Connect (OSTI)

      2015-04-02

      The Water Power Program helps industry harness this renewable, emissions-free resource to generate environmentally sustainable and cost-effective electricity. Through support for public, private, and nonprofit efforts, the Water Power Program promotes the development, demonstration, and deployment of advanced hydropower devices and pumped storage hydropower applications. These technologies help capture energy stored by diversionary structures, increase the efficiency of hydroelectric generation, and use excess grid energy to replenish storage reserves for use during periods of peak electricity demand. In addition, the Water Power Program works to assess the potential extractable energy from domestic water resources to assist industry and government in planning for our nation’s energy future. From FY 2008 to FY 2014, DOE’s Water Power Program announced awards totaling approximately $62.5 million to 33 projects focused on hydropower. Table 1 provides a brief description of these projects.

    8. Research Projects

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      Past Research Projects Composite-to-Steel Joint Integrity Monitoring and Assessment Collaboration between Los Alamos National Laboratory and the University of California at San Diego (UCSD) Jacobs School of Engineering Contact Institute Director Charles Farrar (505) 663-5330 Email UCSD EI Director Michael Todd (858) 534-5951 Professional Staff Assistant Ellie Vigil (505) 667-2818 Email Administrative Assistant Rebecca Duran (505) 665-8899 Email UCSD Faculty and Graduate Students Professor

    9. MONTICELLO PROJECTS

      Office of Legacy Management (LM)

      09 January 2010 Doc. No. S06172 Page 1 1.3 Peripheral Properties (Private and City-Owned) * No land use or supplemental standards compliance issues were observed or reported by LTSM on-site staff. Monticello National Priorities List Sites Federal Facilities Agreement (FFA) Quarterly Report: October 1-December 31, 2009 This report summarizes project status and activities implemented October through December 2009, and provides a schedule of near-term activities for the Monticello Mill Tailings

    10. MONTICELLO PROJECTS

      Office of Legacy Management (LM)

      1 July 2011 Doc. No. S07978 Page 1 Monticello, Utah, National Priorities List Sites Federal Facility Agreement (FFA) Quarterly Report: April 1-June 30, 2011 This report summarizes project status and activities implemented April through June 2011 and provides a schedule for near-term activities at the Monticello Vicinity Properties (MVP) site and the Monticello Mill Tailings Site (MMTS) located in and near Monticello, Utah. The MMTS and MVP were placed on the U.S. Environmental Protection Agency

    11. MONTICELLO PROJECTS

      Office of Legacy Management (LM)

      31, 2011 April 2011 Doc. No. S07666 Page 1 Monticello, Utah, National Priorities List Sites Federal Facility Agreement (FFA) Quarterly Report: January 1-March 31, 2011 This report summarizes project status and activities implemented January through March 2011 and provides a schedule for near-term activities at the Monticello Vicinity Properties (MVP) site and the Monticello Mill Tailings Site (MMTS) located in and near Monticello, Utah. The MMTS and MVP were placed on the U.S. Environmental

    12. Hallmark Project

      Office of Environmental Management (EM)

      Project Commercialization of the Secure SCADA Communications Protocol, a cryptographic security solution for device-to-device communication Increased connectivity and automation in the control systems that manage the nation's energy infrastructure have improved system functionality, but left systems more vulnerable to cyber attack. Intruders could severely disrupt control system operation by sending fabricated information or commands to control system devices. To ensure message integrity,

    13. Tuning electron transport through a single molecular junction by bridge modification

      SciTech Connect (OSTI)

      Li, Xiao-Fei Qiu, Qi; Luo, Yi

      2014-07-07

      The possibility of controlling electron transport in a single molecular junction represents the ultimate goal of molecular electronics. Here, we report that the modification of bridging group makes it possible to improve the performance and obtain new functions in a single cross-conjugated molecular junction, designed from a recently synthesized bipolar molecule bithiophene naphthalene diimide. Our first principles results show that the bipolar characteristic remains after the molecule was modified and sandwiched between two metal electrodes. Rectifying is the intrinsic characteristic of the molecular junction and its performance can be enhanced by replacing the saturated bridging group with an unsaturated group. A further improvement of the rectifying and a robust negative differential resistance (NDR) behavior can be achieved by the modification of unsaturated bridge. It is revealed that the modification can induce a deviation angle about 4° between the donor and the acceptor π-conjugations, making it possible to enhance the communication between the two π systems. Meanwhile, the low energy frontier orbitals of the junction can move close to the Fermi level and encounter in energy at certain biases, thus a transport channel with a considerable transmission can be formed near the Fermi level only at a narrow bias regime, resulting in the improvement of rectifying and the robust NDR behavior. This finding could be useful for the design of single molecular devices.

    14. Silicon Solar Cells with Front Hetero-Contact and Aluminum Alloy Back Junction: Preprint

      SciTech Connect (OSTI)

      Yuan, H.-C.; Page, M. R.; Iwaniczko, E.; Xu, Y.; Roybal, L.; Wang, Q.; Branz, H. M.; Meier, D. L.

      2008-05-01

      We prototype an alternative n-type monocrystalline silicon (c-Si) solar cell structure that utilizes an n/i-type hydrogenated amorphous silicon (a-Si:H) front hetero-contact and a back p-n junction formed by alloying aluminum (Al) with the n-type Si wafer.

    15. In situ Formation of Highly Conducting Covalent Au-C Contacts for Single-Molecule Junctions

      SciTech Connect (OSTI)

      Cheng, Z.L.; Hybertsen, M.; Skouta, R.; Vazquez, H.; Widawsky, J.R.; Schneebeli, S.; Chen, W.; Breslow, R.; Venkataraman, L.

      2011-06-01

      Charge transport across metal-molecule interfaces has an important role in organic electronics. Typically, chemical link groups such as thiols or amines are used to bind organic molecules to metal electrodes in single-molecule circuits, with these groups controlling both the physical structure and the electronic coupling at the interface. Direct metal-carbon coupling has been shown through C60, benzene and {pi}-stacked benzene but ideally the carbon backbone of the molecule should be covalently bonded to the electrode without intervening link groups. Here, we demonstrate a method to create junctions with such contacts. Trimethyl tin (SnMe{sub 3})-terminated polymethylene chains are used to form single-molecule junctions with a break-junction technique. Gold atoms at the electrode displace the SnMe{sub 3} linkers, leading to the formation of direct Au-C bonded single-molecule junctions with a conductance that is {approx}100 times larger than analogous alkanes with most other terminations. The conductance of these Au-C bonded alkanes decreases exponentially with molecular length, with a decay constant of 0.97 per methylene, consistent with a non-resonant transport mechanism. Control experiments and ab initio calculations show that high conductances are achieved because a covalent Au-C sigma ({sigma}) bond is formed. This offers a new method for making reproducible and highly conducting metal-organic contacts.

    16. The importance of Fe surface states for spintronic devices based on magnetic tunnel junctions

      SciTech Connect (OSTI)

      Chantis, Athanasios N

      2008-01-01

      In this article we give a review of our recent theoretical studies of the influence of Fe(001) surface (interface) states on spin-polarized electron transport across magnetic tunnel junctions with Fe electrodes. We show that minority-spin surface (interface) states are responsible for at least two effects which are important for spin electronics. First, they can produce a sizable tunneling anisotropic magnetoresistance in magnetic tunnel junctions with a single Fe electrode. The effect is driven by a Rashba shift of the resonant surface band when the magnetization changes direction. This can introduce a new class of spintronic devices, namely, tunneling magnetoresistance junctions with a single ferromagnetic electrode. Second, in Fe/GaAs(001) magnetic tunnel junctions minority-spin interface states produce a strong dependence of the tunneling current spin polarization on applied electrical bias. A dramatic sign reversal within a voltage range of just a few tenths of an eV is predicted. This explains the observed sign reversal of spin polarization in recent experiments of electrical spin injection in Fe/GaAs(001) and related reversal of tunneling magnetoresistance through vertical Fe/GaAs/Fe trilayers.

    17. Imaging the Solar Cell P-N Junction and Depletion Region Using Secondary Electron Contrast

      SciTech Connect (OSTI)

      Heath, J. T.; Jiang, C. S.; Al-Jassim, M. M.

      2011-01-01

      We report on secondary electron (SE) images of cross-sectioned multicrystalline Si and GaAs/GaInP solar cell devices, focusing on quantifying the relationship between the apparent n{sup +}-p contrast and characteristic electronic features of the device. These samples allow us to compare the SE signal from devices which have very different physical characteristics: differing materials, diffused junction versus abrupt junction, heterojunction versus homojunction. Despite these differences, we find that the SE image contrast for both types of sample, and as a function of reverse bias across the diode, closely agrees with PC1D simulations of the bulk electrostatic potential in the device, accurately yielding the depletion edge and width. A spatial derivative of the SE data shows a local maximum at the metallurgical junction. Such data are valuable, for example, in studying the conformity of a diffused junction to the textured surface topography. These data also extend our understanding of the origin of the SE contrast.

    18. Rapid, Enhanced IV Characterization of Multi-Junction PV Devices under One Sun at NREL: Preprint

      SciTech Connect (OSTI)

      Moriarty, Tom; France, Ryan; Steiner, Myles

      2015-09-15

      Multi-junction technology is rapidly advancing, which puts increasing demands on IV characterization resources. We report on a tool and procedure for fast turn-around of IV data under the reference conditions, but also under controlled variations from the reference conditions. This enhanced data set can improve further iterations of device optimization.

    19. PROJECT MANGEMENT PLAN EXAMPLES Project Organization Examples

      Office of Environmental Management (EM)

      Organization Examples Example 8 4.0 PROJECT ORGANIZATION Chapter 4.0 describes the principle project organizations, including their responsibilities and relationships. Other organizations, that have an interest in the project, also are described. 4.1 Principal Project Organizations and Responsibilities The management organization for the 324/327 Buildings Stabilization/Deactivation Project represents a partnership between four principal project organizations responsible for the project. The four

    20. MHK Projects/Manchac Point Project | Open Energy Information

      Open Energy Info (EERE)

      el":"","visitedicon":"" Project Profile Project Start Date 112008 Project City St Gabriel, LA Project StateProvince Louisiana Project Country United States Project Resource...

    1. MHK Projects/Claiborne Island Project | Open Energy Information

      Open Energy Info (EERE)

      el":"","visitedicon":"" Project Profile Project Start Date 112008 Project City St Gabriel, LA Project StateProvince Louisiana Project Country United States Project Resource...

    2. MHK Projects/Point Pleasant Project | Open Energy Information

      Open Energy Info (EERE)

      el":"","visitedicon":"" Project Profile Project Start Date 112008 Project City St Gabriel, LA Project StateProvince Louisiana Project Country United States Project Resource...

    3. MHK Projects/College Point Project | Open Energy Information

      Open Energy Info (EERE)

      bel":"","visitedicon":"" Project Profile Project Start Date 112008 Project City St James, LA Project StateProvince Louisiana Project Country United States Project Resource...

    4. Electrical and photovoltaic characteristics of MoS{sub 2}/Si p-n junctions

      SciTech Connect (OSTI)

      Hao, Lanzhong Liu, Yunjie Gao, Wei; Han, Zhide; Xue, Qingzhong; Zeng, Huizhong; Wu, Zhipeng; Zhu, Jun; Zhang, Wanli

      2015-03-21

      Bulk-like molybdenum disulfide (MoS{sub 2}) thin films were deposited on the surface of p-type Si substrates using dc magnetron sputtering technique and MoS{sub 2}/Si p-n junctions were formed. The vibrating modes of E{sup 1}{sub 2g} and A{sub 1g} were observed from the Raman spectrum of the MoS{sub 2} films. The current density versus voltage (J-V) characteristics of the junction were investigated. A typical J-V rectifying effect with a turn-on voltage of 0.2?V was shown. In different voltage range, the electrical transporting of the junction was dominated by diffusion current and recombination current, respectively. Under the light illumination of 15?mW?cm{sup ?2}, the p-n junction exhibited obvious photovoltaic characteristics with a short-circuit current density of 3.2?mA?cm{sup ?2} and open-circuit voltage of 0.14?V. The fill factor and energy conversion efficiency were 42.4% and 1.3%, respectively. According to the determination of the Fermi-energy level (?4.65?eV) and energy-band gap (?1.45?eV) of the MoS{sub 2} films by capacitance-voltage curve and ultraviolet-visible transmission spectra, the mechanisms of the electrical and photovoltaic characteristics were discussed in terms of the energy-band structure of the MoS{sub 2}/Si p-n junctions. The results hold the promise for the integration of MoS{sub 2} thin films with commercially available Si-based electronics in high-efficient photovoltaic devices.

    5. DOE Moab Project Reaches Halfway Mark in Mill Tailings Removal 2.5 Million

      Office of Environmental Management (EM)

      Hours Safely Worked | Department of Energy Moab Project Reaches Halfway Mark in Mill Tailings Removal 2.5 Million Hours Safely Worked DOE Moab Project Reaches Halfway Mark in Mill Tailings Removal 2.5 Million Hours Safely Worked January 20, 2016 - 12:00pm Addthis DOE Moab Project Reaches Halfway Mark in Mill Tailings Removal 2.5 Million Hours Safely Worked Media Contact Wendee Ryan, S&K Aerospace Public Affairs Manager, (970) 257-2145 (Grand Junction, CO) - The U.S. Department of Energy

    6. 6 Million Tons of Mill Tailings Removed From DOE Moab Project Site |

      Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

      Department of Energy 6 Million Tons of Mill Tailings Removed From DOE Moab Project Site 6 Million Tons of Mill Tailings Removed From DOE Moab Project Site June 18, 2013 - 12:00pm Addthis Media Contacts Donald Metzler, Moab Federal Project Director (970) 257-2115 Wendee Ryan, S&K Aerospace Public Affairs Manager (970) 257-2145 (Grand Junction, CO) - Today, the Department of Energy (DOE) announced that 6 million tons of uranium mill tailings have been shipped from Moab, Utah, under the

    7. FUSRAP Project

      Office of Legacy Management (LM)

      Project 23b 14501 FUSRAP TECHNICAL BULLETIN N O . - R 3 v . L DATE: 1.2 9-99 SUBJECT : Pr.pec.d BY T r m L u d Approval Summary of the results for the Springdale characterization activities performed per WI-94-015, Rev. 0. TUO separate radiological characterization surveys and a limited cherical characterization survey were performed on the Springdale Site in Octcjer and December, 1993. The design of the radiological surveys were to supplement and define existing ORNL surveys. The limited

    8. TH-C-BRD-12: Robust Intensity Modulated Proton Therapy Plan Can Eliminate Junction Shifts for Craniospinal Irradiation

      SciTech Connect (OSTI)

      Liao, L; Jiang, S; Li, Y; Wang, X; Li, H; Zhu, X; Sahoo, N; Gillin, M; Mahajan, A; Grosshans, D; Zhang, X; Lim, G

      2014-06-15

      Purpose: The passive scattering proton therapy (PSPT) technique is the commonly used radiotherapy technique for craniospinal irradiation (CSI). However, PSPT involves many numbers of junction shifts applied over the course of treatment to reduce the cold and hot regions caused by field mismatching. In this work, we introduced a robust planning approach to develop an optimal and clinical efficient techniques for CSI using intensity modulated proton therapy (IMPT) so that junction shifts can essentially be eliminated. Methods: The intra-fractional uncertainty, in which two overlapping fields shift in the opposite directions along the craniospinal axis, are incorporated into the robust optimization algorithm. Treatment plans with junction sizes 3,5,10,15,20,25 cm were designed and compared with the plan designed using the non-robust optimization. Robustness of the plans were evaluated based on dose profiles along the craniospinal axis for the plans applying 3 mm intra-fractional shift. The dose intra-fraction variations (DIV) at the junction are used to evaluate the robustness of the plans. Results: The DIVs are 7.9%, 6.3%, 5.0%, 3.8%, 2.8% and 2.2%, for the robustly optimized plans with junction sizes 3,5,10,15,20,25 cm. The DIV are 10% for the non-robustly optimized plans with junction size 25 cm. The dose profiles along the craniospinal axis exhibit gradual and tapered dose distribution. Using DIVs less than 5% as maximum acceptable intrafractional variation, the overlapping region can be reduced to 10 cm, leading to potential reduced number of the fields. The DIVs are less than 5% for 5 mm intra-fractional shifts with junction size 25 cm, leading to potential no-junction-shift for CSI using IMPT. Conclusion: This work is the first report of the robust optimization on CSI based on IMPT. We demonstrate that robust optimization can lead to much efficient carniospinal irradiation by eliminating the junction shifts.

    9. Spin and charge transport in double-junction Fe/MgO/GaAs/MgO/Fe heterostructures

      SciTech Connect (OSTI)

      Wolski, S. Szczepa?ski, T.; Dugaev, V. K.; Barna?, J.; Landgraf, B.; Slobodskyy, T.; Hansen, W.

      2015-01-28

      We present theoretical and experimental results on tunneling current in single Fe/MgO/GaAs and double Fe/MgO/GaAs/MgO/Fe tunnel junctions. The charge and spin currents are calculated as a function of external voltage for different sets of parameters characterizing the semiconducting GaAs layer. Transport characteristics of a single Fe/MgO/GaAs junction reveal typical diode as well as spin diode features. The results of numerical calculations are compared with current-voltage characteristics measured experimentally for double tunnel junction structures, and a satisfactory agreement of the theoretical and experimental results has been achieved.

    10. Chemical beam epitaxy growth of AlGaAs/GaAs tunnel junctions using trimethyl aluminium for multijunction solar cells

      SciTech Connect (OSTI)

      Paquette, B.; DeVita, M.; Turala, A.; Kolhatkar, G.; Boucherif, A.; Jaouad, A.; Aimez, V.; Ars, R.; Wilkins, M.; Wheeldon, J. F.; Walker, A. W.; Hinzer, K.; Fafard, S.

      2013-09-27

      AlGaAs/GaAs tunnel junctions for use in high concentration multijunction solar cells were designed and grown by chemical beam epitaxy (CBE) using trimethyl aluminium (TMA) as the p-dopant source for the AlGaAs active layer. Controlled hole concentration up to 4?10{sup 20} cm{sup ?3} was achieved through variation in growth parameters. Fabricated tunnel junctions have a peak tunneling current up to 6140 A/cm{sup 2}. These are suitable for high concentration use and outperform GaAs/GaAs tunnel junctions.

    11. Capital Project Prioritization

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      Capital-Project-Prioritization Sign In About | Careers | Contact | Investors | bpa.gov Search News & Us Expand News & Us Projects & Initiatives Expand Projects &...

    12. Project Grandmaster

      Energy Science and Technology Software Center (OSTI)

      2013-09-16

      The purpose of the Project Grandmaster Application is to allow individuals to opt-in and give the application access to data sources about their activities on social media sites. The application will cross-reference these data sources to build up a picture of each individual activities they discuss, either at present or in the past, and place this picture in reference to groups of all participants. The goal is to allow an individual to place themselves inmore » the collective and to understand how their behavior patterns fit with the group and potentially find changes to make, such as activities they weren’t already aware of or different groups of interest they might want to follow.« less

    13. Project Grandmaster

      SciTech Connect (OSTI)

      2013-09-16

      The purpose of the Project Grandmaster Application is to allow individuals to opt-in and give the application access to data sources about their activities on social media sites. The application will cross-reference these data sources to build up a picture of each individual activities they discuss, either at present or in the past, and place this picture in reference to groups of all participants. The goal is to allow an individual to place themselves in the collective and to understand how their behavior patterns fit with the group and potentially find changes to make, such as activities they weren?t already aware of or different groups of interest they might want to follow.

    14. Project Management Lessons Learned

      Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

      2008-08-05

      The guide supports DOE O 413.3A, Program and Project Management for the Acquisition of Capital Assets, and aids the federal project directors and integrated project teams in the execution of projects.

    15. Contract/Project Management

      Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

      Capital Asset Line Item Projects: (Pre-RCACAP) Projects completed within 110% of CD-2 ... Projects: (Pre- RACCAP) 90% of Projects completed within 110% of CD-2 TPC by FY12. 2b. ...

    16. Contract/Project Management

      Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

      90% of projects completed within 110% of CD-2 TPC by FY11. 80% - Two projects completed ... projects. 3. Certified EVM Systems: Post CD-3, 95% of line item projects and EM cleanup ...

    17. Contract/Project Management

      Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

      Projects: (Pre-RCACAP) 90% of projects completed within 110% of CD-2 TPC by FY11. 1b. ... Projects: (Pre- RACCAP) 90% of projects completed within 110% of CD-2 TPC by FY11. 2b. ...

    18. Perpendicular magnetic tunnel junctions with double barrier and single or synthetic antiferromagnetic storage layer

      SciTech Connect (OSTI)

      Cuchet, La; Rodmacq, Bernard; Auffret, Stphane; Sousa, Ricardo C.; Prejbeanu, Ioan L.; Dieny, Bernard

      2015-06-21

      The magnetic properties of double tunnel junctions with perpendicular anisotropy were investigated. Two synthetic antiferromagnetic references are used, while the middle storage magnetic layer can be either a single ferromagnetic or a synthetic antiferromagnetic FeCoB-based layer, with a critical thickness as large as 3.0?nm. Among the different achievable magnetic configurations in zero field, those with either antiparallel references, and single ferromagnetic storage layer, or parallel references, and synthetic antiferromagnetic storage layer, are of particular interest since they allow increasing the efficiency of spin transfer torque writing and the thermal stability of the stored information as compared to single tunnel junctions. The latter configuration can be preferred when stray fields would favour a parallel orientation of the reference layers. In this case, the synthetic antiferromagnetic storage layer is also less sensitive to residual stray fields.

    19. Vector spin modeling for magnetic tunnel junctions with voltage dependent effects

      SciTech Connect (OSTI)

      Manipatruni, Sasikanth Nikonov, Dmitri E.; Young, Ian A.

      2014-05-07

      Integration and co-design of CMOS and spin transfer devices requires accurate vector spin conduction modeling of magnetic tunnel junction (MTJ) devices. A physically realistic model of the MTJ should comprehend the spin torque dynamics of nanomagnet interacting with an injected vector spin current and the voltage dependent spin torque. Vector spin modeling allows for calculation of 3 component spin currents and potentials along with the charge currents/potentials in non-collinear magnetic systems. Here, we show 4-component vector spin conduction modeling of magnetic tunnel junction devices coupled with spin transfer torque in the nanomagnet. Nanomagnet dynamics, voltage dependent spin transport, and thermal noise are comprehended in a self-consistent fashion. We show comparison of the model with experimental magnetoresistance (MR) of MTJs and voltage degradation of MR with voltage. Proposed model enables MTJ circuit design that comprehends voltage dependent spin torque effects, switching error rates, spin degradation, and back hopping effects.

    20. Proximity induced vortices and long-range triplet supercurrents in ferromagnetic Josephson junctions and spin valves

      SciTech Connect (OSTI)

      Alidoust, Mohammad; Halterman, Klaus

      2015-03-28

      Using a spin-parameterized quasiclassical Keldysh-Usadel technique, we theoretically study supercurrent transport in several types of diffusive ferromagnetic (F)/superconducting (S) configurations with differing magnetization textures. We separate out the even- and odd-frequency components of the supercurrent within the low proximity limit and identify the relative contributions from the singlet and triplet channels. We first consider inhomogeneous one-dimensional Josephson structures consisting of a uniform bilayer magnetic S/F/F/S structure and a trilayer S/F/F/F/S configuration, in which case the outer F layers can have either a uniform or conical texture relative to the central uniform F layer. Our results demonstrate that for supercurrents flowing perpendicular to the F/F interfaces, incorporating a conical texture yields the most effective way to observe the signatures of long-ranged spin-triplet supercurrents. We also consider three different types of finite-sized two-dimensional magnetic structures subjected to an applied magnetic field normal to the junction plane: a S/F/S junction with uniform magnetization texture and two S/F/F/S configurations with differing F/F bilayer arrangements. In one case, the F/F interface is parallel with the S/F junction interfaces while in the other case, the F/F junction is oriented perpendicular to the S/F interfaces. We then discuss the proximity vortices and corresponding spatial maps of currents inside the junctions. For the uniform S/F/S junction, we analytically calculate the magnetic field induced supercurrent and pair potential in both the narrow and wide junction regimes, thus providing insight into the variations in the Fraunhofer diffraction patterns and proximity vortices when transitioning from a wide junction to a narrow one. Our extensive computations demonstrate that the induced long-range spin-triplet supercurrents can deeply penetrate uniform F/F bilayers when spin-singlet supercurrents flow parallel to the F/F interfaces. This is in stark contrast to configurations where a spin-singlet supercurrent flows perpendicular to the F/F interfaces. We pinpoint the origin of the induced triplet and singlet correlations through spatial profiles of the decomposed total supercurrents. We find that the penetration of the long-range spin-triplet supercurrents associated with supercurrents flowing parallel to the F/F interfaces is more pronounced when the thicknesses of the F strips are unequal. Finally, if one of the S terminals is replaced with a finite-sized normal metal, we demonstrate that the corresponding experimentally accessible S/F/F/N spin valve presents an effective platform in which the predicted long-range effects can be effectively generated and probed.

    1. Multiple junction cell characterization using the LBIC method : early results, issues, and pathways to improvement.

      SciTech Connect (OSTI)

      Finn, Jason R.; Granata, Jennifer E.; Hansen, Barry R.

      2010-03-01

      A light beam induced current (LBIC) measurement is a non-destructive technique that produces a spatial graphical representation of current response in photovoltaic cells with respect to position when stimulated by a light beam. Generally, a laser beam is used for these measurements because the spot size can be made very small, on the order of microns, and very precise measurements can be made. Sandia National Laboratories Photovoltaic System Evaluation Laboratory (PSEL) uses its LBIC measurement technique to characterize single junction mono-crystalline and multi-crystalline solar cells ranging from miniature to conventional sizes. Sandia has modified the already valuable LBIC technique to enable multi-junction PV cells to be characterized.

    2. Electronic transport in biphenyl single-molecule junctions with carbon nanotubes electrodes: The role of molecular conformation and chirality

      SciTech Connect (OSTI)

      Brito Silva, C. A. Jr.; Granhen, E. R. [Pos-Graduacao em Engenharia Eletrica, Universidade Federal do Para, 66075-900 Belem, PA (Brazil); Silva, S. J. S. da; Leal, J. F. P. [Pos-Graduacao em Fisica, Universidade Federal do Para, 66075-110 Belem, PA (Brazil); Del Nero, J. [Departamento de Fisica, Universidade Federal do Para, 66075-110 Belem, PA (Brazil); Divisao de Metrologia de Materiais, Instituto Nacional de Metrologia, Normalizacao e Qualidade Industrial, 25250-020 Duque de Caxias, RJ (Brazil); Instituto de Fisica, Universidade Federal do Rio de Janeiro, 21941-972 Rio de Janeiro, RJ (Brazil); Pinheiro, F. A. [Instituto de Fisica, Universidade Federal do Rio de Janeiro, 21941-972 Rio de Janeiro, RJ (Brazil)

      2010-08-15

      We investigate, by means of ab initio calculations, electronic transport in molecular junctions composed of a biphenyl molecule attached to metallic carbon nanotubes. We find that the conductance is proportional to cos{sup 2} {theta}, with {theta} the angle between phenyl rings, when the Fermi level of the contacts lies within the frontier molecular orbitals energy gap. This result, which agrees with experiments in biphenyl junctions with nonorganic contacts, suggests that the cos{sup 2} {theta} law has a more general applicability, irrespective of the nature of the electrodes. We calculate the geometrical degree of chirality of the junction, which only depends on the atomic positions, and demonstrate that it is not only proportional to cos{sup 2} {theta} but also is strongly correlated with the current through the system. These results indicate that molecular conformation plays the preponderant role in determining transport properties of biphenyl-carbon nanotubes molecular junctions.

    3. EIS-0126: Remedial Actions at the Former Climax Uranium Company Uranium Mill Site, Grand Junction, Mesa County, Colorado

      Broader source: Energy.gov [DOE]

      The U.S. Department of Energy developed this EIS to assess the environmental impacts of remediating the residual radioactive materials left from the inactive uranium processing site and associated properties located in Grand Junction, Colorado.

    4. Superlinear generation of exciton and related paramagnetism induced by forward current in a diamond p-i-n junction

      SciTech Connect (OSTI)

      Natori, Kenji

      2015-02-07

      The concentration of excitons generated in a high-quality diamond p-i-n junction is investigated considering the forward current characteristics of the junction. As the forward current in the junction increases, the exciton concentration increases superlinearly, contrary to the linear increases of the electron and hole concentration. This tendency suggests a superlinear increase in emission intensity due to exciton recombination. The increase rate is more radical than quadratic, in accordance with the observed increase of the integrated intensity of free exciton emission. To estimate the concentration of triplet excitons generated in the p-i-n junction, observation of the paramagnetism due to the exciton spin moment is proposed. The magnetic susceptibility superlinearly increases with the increase in the forward current, unlike any other magnetic property of the device.

    5. Western Interconnection Synchrophasor Project

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      Demonstration Project Western Interconnection Synchrophasor Project Resources & Links Demand Response Energy Efficiency Emerging Technologies Synchrophasor measurements are a...

    6. Project File System

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      Project File System Project File System Overview The project file system is a global file system available on all NERSC computational systems. It allows sharing of data between users, systems, and/or (via science gateways) the "outside world". Default project directories are provided to every MPP project. Additional project directories can be provided upon request. Purging No, files in project directories are not subject to purging. Backup Daily backups are performed for project

    7. Community Renewables Projects

      Broader source: Energy.gov [DOE]

      This webinar covered introduction and barriers to individual renewable projects, resources for community and group buy projects, and permitting guidelines.

    8. In the OSTI Collections: Josephson Junctions | OSTI, US Dept of Energy,

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      Office of Scientific and Technical Information Josephson Junctions Article Acknowledgement: Dr. William N. Watson, Physicist DOE Office of Scientific and Technical Information Terahertz Radiation Examining Subatomic Particles Measuring Material Properties Noise Spin and Supercurrents References Research Organizations Reports available through OSTI's SciTech Connect Additional References When a steady voltage gradient is applied along an ordinary conducting wire, electrons in the wire will

    9. NREL's Multi-Junction Solar Cells Teach Scientists How to Turn Plants into

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      Powerhouses - News Releases | NREL NREL's Multi-Junction Solar Cells Teach Scientists How to Turn Plants into Powerhouses May 12, 2011 Plants can overcome their evolutionary legacies to become much better at using biological photosynthesis to produce energy, the kind of energy that can power vehicles in the near future, an all-star collection of biologists, physicists, photochemists, and solar scientists has found. A U.S. Department of Energy (DOE) workshop that drew a prestigious collection

    10. U.S. Department of Energy at Grand Junction 2003 Annual Inspection⎯Monticello, Utah

      Office of Legacy Management (LM)

      at Grand Junction 2003 Annual Inspection⎯Monticello, Utah November 2003 Page 1 2003 Annual Inspection of the Monticello Mill Tailings (USDOE) and Monticello Radioactively Contaminated Properties Sites Summary The Monticello site, which includes the U.S. Department of Energy (DOE) Monticello Mill Tailings Site (MMTS) and the Monticello Radioactively Contaminated Properties site, was inspected September 23-25, 2003. A follow-up inspection of the Soil and Sediment properties was conducted on

    11. The influence of electron irradiation on electron holography of focused ion beam milled GaAs p-n junctions

      SciTech Connect (OSTI)

      Cooper, David; Twitchett-Harrison, Alison C.; Midgley, Paul A.; Dunin-Borkowski, Rafal E.

      2007-05-01

      Electron beam irradiation is shown to significantly influence phase images recorded from focused ion beam milled GaAs p-n junction specimens examined using off-axis electron holography in the transmission electron microscope. Our results show that the use of improved electrical connections to the specimen overcomes this problem, and may allow the correct built in potential across the junction to be recovered.

    12. Competition between cotunneling, Kondo effect, and direct tunneling in discontinuous high-anisotropy magnetic tunnel junctions

      SciTech Connect (OSTI)

      Ciudad D.; Arena D.; We, Z.-C.; Hindmarch, A.T.; Negusse, E.; Han, X.-F.Han; Marrows, C.H.

      2012-06-07

      The transition between Kondo and Coulomb blockade effects in discontinuous double magnetic tunnel junctions is explored as a function of the size of the CoPt magnetic clusters embedded between AlO{sub x} tunnel barriers. A gradual competition between cotunneling enhancement of the tunneling magnetoresistance (TMR) and the TMR suppression due to the Kondo effect has been found in these junctions, with both effects having been found to coexist even in the same sample. It is possible to tune between these two states with temperature (at a temperature far below the cluster blocking temperature). In addition, when further decreasing the size of the CoPt clusters, another gradual transition between the Kondo effect and direct tunneling between the electrodes takes place. This second transition shows that the spin-flip processes found in junctions with impurities in the barrier are in fact due to the Kondo effect. A simple theoretical model able to account for these experimental results is proposed.

    13. Physical model of the contact resistivity of metal-graphene junctions

      SciTech Connect (OSTI)

      Chaves, Ferney A., E-mail: ferneyalveiro.chaves@uab.cat; Jimnez, David [Departament d'Enginyeria Electrnica, Escola d'Enginyeria, Universitat Autnoma de Barcelona, Campus UAB, 08193 Bellaterra, Barcelona (Spain); Cummings, Aron W. [ICN2Institut Catal de Nanocincia i Nanotecnologia, Campus UAB, 08193 Bellaterra, Barcelona (Spain); Roche, Stephan [ICN2Institut Catal de Nanocincia i Nanotecnologia, Campus UAB, 08193 Bellaterra, Barcelona (Spain); ICREA, Instituci Catalana de Recerca i Estudis Avanats, 08070 Barcelona (Spain)

      2014-04-28

      While graphene-based technology shows great promise for a variety of electronic applications, including radio-frequency devices, the resistance of the metal-graphene contact is a technological bottleneck for the realization of viable graphene electronics. One of the most important factors in determining the resistance of a metal-graphene junction is the contact resistivity. Despite the large number of experimental works that exist in the literature measuring the contact resistivity, a simple model of it is still lacking. In this paper, we present a comprehensive physical model for the contact resistivity of these junctions, based on the Bardeen Transfer Hamiltonian method. This model unveils the role played by different electrical and physical parameters in determining the specific contact resistivity, such as the chemical potential of interaction, the work metal-graphene function difference, and the insulator thickness between the metal and graphene. In addition, our model reveals that the contact resistivity is strongly dependent on the bias voltage across the metal-graphene junction. This model is applicable to a wide variety of graphene-based electronic devices and thus is useful for understanding how to optimize the contact resistance in these systems.

    14. Terahertz time domain interferometry of a SIS tunnel junction and a quantum point contact

      SciTech Connect (OSTI)

      Karadi, C

      1995-09-01

      The author has applied the Terahertz Time Domain Interferometric (THz-TDI) technique to probe the ultrafast dynamic response of a Superconducting-Insulating-Superconducting (SIS) tunnel junction and a Quantum Point Contact (QPC). The THz-TDI technique involves monitoring changes in the dc current induced by interfering two picosecond electrical pulses on the junction as a function of time delay between them. Measurements of the response of the Nb/AlO{sub x}/Nb SIS tunnel junction from 75--200 GHz are in full agreement with the linear theory for photon-assisted tunneling. Likewise, measurements of the induced current in a QPC as a function of source-drain voltage, gate voltage, frequency, and magnetic field also show strong evidence for photon-assisted transport. These experiments together demonstrate the general applicability of the THz-TDI technique to the characterization of the dynamic response of any micron or nanometer scale device that exhibits a non-linear I-V characteristic. 133 refs., 49 figs.

    15. National Uranium Resource Evaluation. Bibliographic index of Grand Junction office uranium reports

      SciTech Connect (OSTI)

      Johnson, J.B.

      1981-05-01

      In October 1978, Mesa College entered into subcontract with Bendix Field Engineering Corporation (BFEC) to prepare a bibliographic index of the uranium raw materials reports issued by the Grand Junction Office of the US Department of Energy (DOE). Bendix, prime contractor to the Grand Junction Office, operates the Technical Library at the DOE facility. Since the early 1950s, approximately 2700 reports have been issued by the Grand Junction Office. These reports were the results of uranium investigations conducted by federal agencies and their subcontractors. The majority of the reports cover geology, mineralogy, and metallurgy of uranium and/or thorium. No single, complete list of these reports existed. The purpose of this subcontract was to compile a comprehensive index to these reports. The Mesa College geology faculty worked with the BFEC and DOE staffs to develop the format for the index. Undergraduate geology students from Mesa compiled a master record sheet for each report. All reports issued up to January 1, 1979 were included in the bibliography. The bibliography is in preliminary, unedited form. It is being open-filed at this time, on microfiche, to make the information available to the public on a timely basis. The bibliography is divided into a master record list arranged in alpha-numeric order by report identification number, with separate indices arranged by title, author, state and county, 1/sup 0/ x 2/sup 0/ NTMS quadrangle, key words, and exploration area.

    16. MHK Projects/Admirality Inlet Tidal Energy Project | Open Energy...

      Open Energy Info (EERE)

      eLabel":"","visitedicon":"" Project Profile Project Start Date 112006 Project City Port Townsend, WA Project StateProvince Washington Project Country United States...

    17. Demonstration project Smart Charging (Smart Grid Project) | Open...

      Open Energy Info (EERE)

      Smart Grid Projects Smart Grid Projects in Europe Smart Grid Projects - Grid Automation Distribution Smart Grid Projects - Integrated System Smart Grid Projects - Home...

    18. Preparing for Project Implementation Financing Project Implementation

      Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

      August 11, 2010 9 - Preparing for Project Implementation Financing Project Implementation Save Energy Now LEADER Web Conference Project Implementation Seminar Series Save Energy Now LEADER Web Conference Agenda  Seminar Series Overview  Recap Seminar # 8 - "Announcing the PRIZE"  Financing Project Implementation Fred Schoeneborn - ORNL team Robert Varcoe - UAW & General Motors  Questions/Future Seminars Save Energy Now LEADER Web Conference Project Implementation Series

    19. Project Plan: Long-Term Surveillance Plan (LTSP) for the Piqua Nuclear Power Facility, Piqua, Ohio, April 1998 (minor revisions November 1999).

      Office of Legacy Management (LM)

      Long-Term Surveillance and Maintenance Program Long-Term Surveillance Plan for the Piqua Nuclear Power Facility Piqua, Ohio April 1998 (minor revisions November 1999) Prepared for U.S. Department of Energy Albuquerque Operations Office Grand Junction Office Prepared by MACTEC Environmental Restoration Services, LLC Grand Junction, Colorado Project Number LTS-111-0027-00-000 Document Number S0007600 Work Performed Under DOE Contract Number DE-AC13-96GJ87335 Task Order Number MAC98-06 This page

    20. Step 3: Project Refinement

      Energy Savers [EERE]

      3: Project Refinement 2 1 Potential 3 Refinement 4 Implementation 5 Operations & Maintenance 2 Options 3 Refinement 1/28/2016 2 3 FUNDING AND FINANCING OPTIONS Project Ownership Financing structure is highly dependent on size of the project and the capital available for a given project: * Tribe owns the project (cash purchase or debt) * Tribe hosts the project and buys the electricity (power purchase agreement) * Tribe partners with private sector and co-owns the project (uncertainties about

    1. Moab Project Safely Logs 2 Million Work Hours | Department of Energy

      Energy Savers [EERE]

      Safely Logs 2 Million Work Hours Moab Project Safely Logs 2 Million Work Hours March 12, 2014 - 12:00pm Addthis Empty containers on haul trucks are being loaded with mill tailings. Empty containers on haul trucks are being loaded with mill tailings. Media Contacts Donald Metzler, Moab Federal Project Director, (970) 257-2115 Wendee Ryan, S&K Aerospace Public Affairs Manager, (970) 257-2145 (Grand Junction, CO) - The number 1,584 may not mean much to most people, but for the workers on the

    2. Monitoring Results Natural Gas Wells Near Project Rulison third Quarter 2015

      Office of Legacy Management (LM)

      5 November 2015 Doc. No. S13372 Page 1 of 6 Monitoring Results Natural Gas Wells Near Project Rulison Third Quarter 2015 U.S. Department of Energy Office of Legacy Management Grand Junction, Colorado Date Sampled: June 22, 2015 Background Project Rulison was the second Plowshare Program test to stimulate natural gas recovery from deep, low-permeability formations. On September 10, 1969, a 40-kiloton-yield nuclear device was detonated 8,426 feet (1.6 miles) below ground surface in the Williams

    3. Monitoring Results for Natural Gas Wells Near Project Rulison, 2nd Quarter, Fiscal Year 2015

      Office of Legacy Management (LM)

      2nd Quarter FY 2015, Rulison Site October 2015 Doc. No. S13368 Page 1 of 6 Monitoring Results for Natural Gas Wells Near Project Rulison, 2nd Quarter, Fiscal Year 2015 U.S. Department of Energy Office of Legacy Management Grand Junction, Colorado Date Sampled: March 31, 2015 Background Project Rulison was the second Plowshare Program test to stimulate natural gas recovery from deep, low-permeability formations. On September 10, 1969, a 40-kiloton-yield nuclear device was detonated 8,426 feet

    4. Project Reports for Haida Corporation- 2010 Project

      Broader source: Energy.gov [DOE]

      The Reynolds Creek Hydroelectric Project ("Reynolds Creek" or the "Project") is a 5 MW hydroelectric resource to be constructed on Prince of Wales Island, Alaska, approximately 10 miles east of Hydaburg.

    5. Project Information Form for Usability Projects

      Broader source: Energy.gov [DOE]

      For user-centered design projects such as a survey or card sort, complete the user-centered design project information form and send it to the Web Governance Team facilitator.

    6. Project Reports for Chickasaw Nation- 2010 Project

      Broader source: Energy.gov [DOE]

      Under this project, the Chickasaw Nation, Division of Commerce (CNDC) will upgrade old, inefficient lighting systems throughout CNDC to new, energy saving systems. Learn more about this project or...

    7. Step 4: Project Implementation

      Energy Savers [EERE]

      Process Step 4: Project Implementation Presentation Agenda * Step 4: Project Implementation - Pre-construction - Contract execution - Interconnection - Project construction - Commissioning * Project Example 2 1/28/2016 2 1 Potential 3 Refinement 5 Operations & Maintenance 2 Options 4 Implementation 4 Implementation 3 Potential Options Refinement Implementation Operations & Maintenance Step 4: Implementation 4 Purpose: Contract and begin physical construction of project Tasks: * Finalize

    8. Two-Dimensional Measurement of n+-p Asymmetrical Junctions in Multicrystalline Silicon Solar Cells using AFM-Based Electrical Techniques with Nanometer Resolution

      SciTech Connect (OSTI)

      Jiang, C. S.; Heath, J. T.; Moutinho, H. R.; Li, J. V.; Al-Jassim, M. M.

      2011-01-01

      Lateral inhomogeneities of modern solar cells demand direct electrical imaging with nanometer resolution. We show that atomic force microscopy (AFM)-based electrical techniques provide unique junction characterizations, giving a two-dimensional determination of junction locations. Two AFM-based techniques, scanning capacitance microscopy/spectroscopy (SCM/SCS) and scanning Kelvin probe force microscopy (SKPFM), were significantly improved and applied to the junction characterizations of multicrystalline silicon (mc-Si) cells. The SCS spectra were taken pixel by pixel by precisely controlling the tip positions in the junction area. The spectra reveal distinctive features that depend closely on the position relative to the electrical junction, which allows us to indentify the electrical junction location. In addition, SKPFM directly probes the built-in potential over the junction area modified by the surface band bending, which allows us to deduce the metallurgical junction location by identifying a peak of the electric field. Our results demonstrate resolutions of 10-40 nm, depending on the techniques (SCS or SKPFM). These direct electrical measurements with nanometer resolution and intrinsic two-dimensional capability are well suited for investigating the junction distribution of solar cells with lateral inhomogeneities.

    9. Two-Dimensional Measurement of n+-p Asymmetrical Junctions in Multicrystalline Silicon Solar Cells Using AFM-Based Electrical Techniques with Nanometer Resolution: Preprint

      SciTech Connect (OSTI)

      Jiang, C. S.; Moutinho, H. R.; Li, J. V.; Al-Jassim, M. M.; Heath, J. T.

      2011-07-01

      Lateral inhomogeneities of modern solar cells demand direct electrical imaging with nanometer resolution. We show that atomic force microscopy (AFM)-based electrical techniques provide unique junction characterizations, giving a two-dimensional determination of junction locations. Two AFM-based techniques, scanning capacitance microscopy/spectroscopy (SCM/SCS) and scanning Kelvin probe force microscopy (SKPFM), were significantly improved and applied to the junction characterizations of multicrystalline silicon (mc-Si) cells. The SCS spectra were taken pixel by pixel by precisely controlling the tip positions in the junction area. The spectra reveal distinctive features that depend closely on the position relative to the electrical junction, which allows us to indentify the electrical junction location. In addition, SKPFM directly probes the built-in potential over the junction area modified by the surface band bending, which allows us to deduce the metallurgical junction location by identifying a peak of the electric field. Our results demonstrate resolutions of 10-40 nm, depending on the techniques (SCS or SKPFM). These direct electrical measurements with nanometer resolution and intrinsic two-dimensional capability are well suited for investigating the junction distribution of solar cells with lateral inhomogeneities.

    10. Contract/Project Management

      Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

      of projects completed within 110% of CD-2 TPC by FY11. 80% - No 1 st Qtr FY09 completions. ... projects. 3. Certified EVM Systems: Post CD-3, 95% of line item projects and EM cleanup ...

    11. Contract/Project Management

      Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

      90% of projects completed within 110% of CD-2 TPC by FY11. 75% 76% This is a 3-year ... projects. 3. Certified EVM Systems: Post CD-3, 95% of line item projects and EM cleanup ...

    12. Contract/Project Management

      Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

      Pre- & Post-CAP Comment 1a. Capital Asset Line Item Projects: (Pre-RCACAP) 90% of projects completed within 110% of CD-2 TPC by FY11. 1b. Capital Asset Line Item Projects: ...

    13. Carcinoembryonic antigen promotes colorectal cancer progression by targeting adherens junction complexes

      SciTech Connect (OSTI)

      Bajenova, Olga; Chaika, Nina; Tolkunova, Elena; Davydov-Sinitsyn, Alexander; Gapon, Svetlana; Thomas, Peter; OBrien, Stephen

      2014-06-10

      Oncomarkers play important roles in the detection and management of human malignancies. Carcinoembryonic antigen (CEA, CEACAM5) and epithelial cadherin (E-cadherin) are considered as independent tumor markers in monitoring metastatic colorectal cancer. They are both expressed by cancer cells and can be detected in the blood serum. We investigated the effect of CEA production by MIP101 colorectal carcinoma cell lines on E-cadherin adherens junction (AJ) protein complexes. No direct interaction between E-cadherin and CEA was detected; however, the functional relationships between E-cadherin and its AJ partners: ?-, ?- and p120 catenins were impaired. We discovered a novel interaction between CEA and beta-catenin protein in the CEA producing cells. It is shown in the current study that CEA overexpression alters the splicing of p120 catenin and triggers the release of soluble E-cadherin. The influence of CEA production by colorectal cancer cells on the function of E-cadherin junction complexes may explain the link between the elevated levels of CEA and the increase in soluble E-cadherin during the progression of colorectal cancer. - Highlights: Elevated level of CEA increases the release of soluble E-cadherin during the progression of colorectal cancer. CEA over-expression alters the binding preferences between E-cadherin and its partners: ?-, ?- and p120 catenins in adherens junction complexes. CEA produced by colorectal cancer cells interacts with beta-catenin protein. CEA over-expression triggers the increase in nuclear beta-catenin. CEA over-expression alters the splicing of p120 catenin protein.

    14. Buckman Direct Diversion Project

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      Buckman Direct Diversion Project Buckman Direct Diversion Project This project takes surface water from the Rio Grande, and then treats and distributes these waters to the city and county of Santa Fe through their drinking water distribution systems. August 1, 2013 Water flumes at Buckman Direct Diversion Project Water flumes at Buckman Direct Diversion Project The City of Santa Fe and Santa Fe County completed the construction of the Buckman Direct Diversion (BDD) Project in December 2010. The

    15. Perspectives on Project Finance

      Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

      Project Finance July 29 2014 Project Company (Borrower) Off-take Agreements Feedstock Agreements O&M Agreement EPC Contract (construct) Technology License Agreements Sponsor's Equity Project Level Equity Investors Senior Project Debt Providers Equity Investors Typical Project Finance Structure 2 SOUND PROJECT ECONOMICS Leads to Adequate Debt Service Coverage And Acceptable Equity Returns Market Risk Assessment Competitive positioning. Supply / demand forecasts. Competing suppliers.

    16. PROJECT MANGEMENT PLAN EXAMPLES

      Office of Environmental Management (EM)

      Baselines - Performance Baseline Examples Example 34 6.0 PROJECT BASELINE This section presents a summary of the PFP Stabilization and Deactivation Project baseline, which was prepared by an inter- contractor team to support an accelerated planning case for the project. The project schedules and associated cost profiles presented in this section are compared to the currently approved project baseline, as contained in the Facility Stabilization Project Fiscal Year 1999 Multi-Year Work Plan (MYWP)

    17. Bradys EGS Project

      Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

      Bradys EGS Project DOE: DE-FG36-08GO18200 Kyle Snyder Ezra Zemach Ormat Nevada Inc. Project Officer: Bill Vandermeer Total Project Funding: $6.6M April 22nd, 2013 This presentation does not contain any proprietary confidential, or otherwise restricted information. Insert photo of your choice 2 | US DOE Geothermal Program eere.energy.gov - Timeline * Project start date: September 2008, contract singed on June 2009 * Project end date: December 2013 * percent complete: ~50% - Budget * Total project

    18. Projects | Department of Energy

      Energy Savers [EERE]

      Projects Projects The U.S. Department of Energy supports a variety of energy-related projects on tribal lands. Through these projects, tribes have built the institutional capacity to manage their energy needs, assessed the feasibility of energy efficiency and renewable energy installation, and demonstrated the viability of installing renewable energy systems on tribal lands. View a map of projects, get information on project funding history, learn about Tribal Energy Deployment Program staff,

    19. InGaN/GaN tunnel junctions for hole injection in GaN light emitting diodes

      SciTech Connect (OSTI)

      Krishnamoorthy, Sriram E-mail: rajan@ece.osu.edu; Akyol, Fatih; Rajan, Siddharth E-mail: rajan@ece.osu.edu

      2014-10-06

      InGaN/GaN tunnel junction contacts were grown using plasma assisted molecular beam epitaxy (MBE) on top of a metal-organic chemical vapor deposition (MOCVD)-grown InGaN/GaN blue (450?nm) light emitting diode. A voltage drop of 5.3?V at 100?mA, forward resistance of 2 10{sup ?2} ? cm{sup 2}, and a higher light output power compared to the reference light emitting diodes (LED) with semi-transparent p-contacts were measured in the tunnel junction LED (TJLED). A forward resistance of 5??10{sup ?4} ? cm{sup 2} was measured in a GaN PN junction with the identical tunnel junction contact as the TJLED, grown completely by MBE. The depletion region due to the impurities at the regrowth interface between the MBE tunnel junction and the MOCVD-grown LED was hence found to limit the forward resistance measured in the TJLED.

    20. Enhanced efficiency of graphene-silicon Schottky junction solar cells by doping with Au nanoparticles

      SciTech Connect (OSTI)

      Liu, X.; Zhang, X. W. Yin, Z. G.; Meng, J. H.; Gao, H. L.; Zhang, L. Q.; Zhao, Y. J.; Wang, H. L.

      2014-11-03

      We have reported a method to enhance the performance of graphene-Si (Gr/Si) Schottky junction solar cells by introducing Au nanoparticles (NPs) onto the monolayer graphene and few-layer graphene. The electron transfer between Au NPs and graphene leads to the increased work function and enhanced electrical conductivity of graphene, resulting in a remarkable improvement of device efficiency. By optimizing the initial thickness of Au layers, the power conversion efficiency of Gr/Si solar cells can be increased by more than three times, with a maximum value of 7.34%. These results show a route for fabricating efficient and stable Gr/Si solar cells.

    1. Unpaired Majorana modes in Josephson-Junction Arrays with gapless bulk excitations

      DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

      Pino, M.; Tsvelik, A.; Ioffe, L. B.

      2015-11-06

      In this study, the search for Majorana bound states in solid-state physics has been limited to materials that display a gap in their bulk spectrum. We show that such unpaired states appear in certain quasi-one-dimensional Josephson-junction arrays with gapless bulk excitations. The bulk modes mediate a coupling between Majorana bound states via the Ruderman-Kittel-Yosida-Kasuya mechanism. As a consequence, the lowest energy doublet acquires a finite energy difference. For a realistic set of parameters this energy splitting remains much smaller than the energy of the bulk eigenstates even for short chains of length L~10.

    2. Multi-state magnetoresistance in ferromagnet/organic-ferromagnet/ferromagnet junctions

      SciTech Connect (OSTI)

      Hu, G. C. Zuo, M. Y.; Li, Y.; Ren, J. F.; Xie, S. J.

      2014-01-20

      Spin-dependent transport through a ferromagnetic metal/organic-ferromagnet/ferromagnet metal junction is investigated theoretically. It is demonstrated that the current through the device strongly depends on the alignment of the magnetization orientations of the electrodes and interlayer. The spin-related electron tunnelling between the ferromagnetic electrodes suffers a further spin selection induced by the spin-polarized states of the central organic ferromagnet. This work indicates an intriguing prospect of organic ferromagnets in spintronic devices, such as four-state magnetoresistance manipulated by a magnetic field.

    3. Dynamical properties of three terminal magnetic tunnel junctions: Spintronics meets spin-orbitronics

      SciTech Connect (OSTI)

      Tomasello, R.; Carpentieri, M.; Finocchio, G.

      2013-12-16

      This Letter introduces a micromagnetic model able to characterize the magnetization dynamics in three terminal magnetic tunnel junctions, where the effects of spin-transfer torque and spin-orbit torque are taken into account. Our results predict that the possibility to separate electrically those two torque sources is very promising from a technological point of view for both next generation of nanoscale spintronic oscillators and microwave detectors. A scalable synchronization scheme based on the parallel connection of those three terminal devices is also proposed.

    4. Transmission Commercial Project Integration

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      Projects Expand Projects Skip navigation links Ancillary and Control Area Services (ACS) Practices Forum Attachment K Commercial Business Process Improvement (CBPI) Customer...

    5. Projects & Facilities - Hanford Site

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      Facilities About Us Projects & Facilities Email Email Page | Print Print Page |Text Increase Font Size Decrease Font Size Projects & Facilities 100 Area 118-K-1 Burial Ground 200...

    6. 2016 Technology Innovation Projects

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      Projects FY 2016 Technology Innovation Project Briefs Demand Response TIP 292: Advanced Heat Pump Water Heater Research TIP 336: Scaled Deployment and Demonstration of Demand...

    7. Falls Creek Hydroelectric Project

      SciTech Connect (OSTI)

      Gustavus Electric Company; Richard Levitt; DOE Project Officer - Keith Bennett

      2007-06-12

      This project was for planning and construction of a 700kW hydropower project on the Fall River near Gustavus, Alaska.

    8. Sandia National Laboratories: Projects

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      Projects Threat and Intelligence Insight Game-changing projects with a high degree of technical risk realized and produced in support of the warfighter Threat and Intelligence...

    9. GTO Project Portfolio

      Office of Energy Efficiency and Renewable Energy (EERE)

      The Office funds 154 research and development projects leveraging nearly $500 million in total combined investment. Each project represents a growing technology sector in conventional hydrothermal,...

    10. Evaluation Project 4492

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      Organization area to allow the movement and radio-graphing of component for evaluation to determine the proper Project Execution Plan for dismantlement. Evaluation Project...

    11. All Selected Projects

      Energy Savers [EERE]

      Selected Projects Oct 23, 2009 (rev. Dec. 14, 2010) 99 Projects SMART GRID INVESTMENT GRANTS Type Advanced Metering Infrastructure Customer Systems Electric Systems Distribution...

    12. Campo Net Meter Project

      Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

      Campo Net Meter Project Michael Connolly Miskwish, MA EconomistEngineer Campo Kumeyaay Nation Location map Tribal Energy Planning Current 50 MW project Proposed 160 MW ...

    13. MHK Projects/Clarence Strait Tidal Energy Project | Open Energy...

      Open Energy Info (EERE)

      Project Country Australia Project Resource Click here Current Tidal Project Nearest Body of Water Clarence Strait Coordinates -12.083533792616, 131.04972839355 Project...

    14. MHK Projects/Twelve Mile Point Project | Open Energy Information

      Open Energy Info (EERE)

      Province Louisiana Project Country United States Project Resource Click here Current Tidal Coordinates 29.9177, -89.9307 Project Phase Phase 1 Project Installed Capacity...

    15. NNSA project receives DOE Secretary's Award for Project Management...

      National Nuclear Security Administration (NNSA)

      project receives DOE Secretary's Award for Project Management Improvement | National ... Blog Home NNSA Blog NNSA project receives DOE Secretary's Award for ... NNSA project ...

    16. U.S. Energy Information Administration (EIA)

      Gasoline and Diesel Fuel Update (EIA)

      Nuclear & Uranium Glossary › FAQS › Overview Data Status of U.S. Nuclear Outages (interactive) Summary Uranium & nuclear fuel Nuclear power plants Spent nuclear fuel International All nuclear data reports Analysis & Projections Major Topics Most popular Nuclear plants and reactors Projections Recurring Uranium All reports Browse by Tag Alphabetical Frequency Tag Cloud Uranium Mill Sites Under the UMTRA Project Remediation of UMTRCA Title I Uranium Mill Sites Under the UMTRA

    17. 0.7-eV GaInAs Junction for a GaInP/GaAs/GaInAs(1-eV)/GaInAs(0.7-eV) Four-Junction Solar Cell: Preprint

      SciTech Connect (OSTI)

      Friedman, D. J.; Geisz, J. F.; Norman, A. G.; Wanlass, M. W.; Kurtz, S. R.

      2006-05-01

      We discuss recent developments in III-V multijunction solar cells, focusing on adding a fourth junction to the Ga0.5In0.5P/GaAs/Ga0.75In0.25As inverted three-junction cell. This cell, grown inverted on GaAs so that the lattice-mismatched Ga0.75In0.25As third junction is the last one grown, has demonstrated 38% efficiency, and 40% is likely in the near future. To achieve still further gains, a lower-bandgap GaxIn1-xAs fourth junction could be added to the three-junction structure for a four-junction cell whose efficiency could exceed 45% under concentration. Here, we present the initial development of the GaxIn1-xAs fourth junction. Junctions of various bandgaps ranging from 0.88 to 0.73 eV were grown, in order to study the effect of the different amounts of lattice mismatch. At a bandgap of 0.88 eV, junctions were obtained with very encouraging {approx}80% quantum efficiency, 57% fill factor, and 0.36 eV open-circuit voltage. The device performance degrades with decreasing bandgap (i.e., increasing lattice mismatch). We model the four-junction device efficiency vs. fourth junction bandgap to show that an 0.7-eV fourth-junction bandgap, while optimal if it could be achieved in practice, is not necessary; an 0.9-eV bandgap would still permit significant gains in multijunction cell efficiency while being easier to achieve than the lower-bandgap junction.

    18. Projects - Summer 2016 Cyclotron Institute REU Program

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      2016 Student Projects

    19. Hetero-junction photovoltaic device and method of fabricating the device

      DOE Patents [OSTI]

      Aytug, Tolga; Christen, David K; Paranthaman, Mariappan Parans; Polat, Ozgur

      2014-02-10

      A hetero-junction device and fabrication method in which phase-separated n-type and p-type semiconductor pillars define vertically-oriented p-n junctions extending above a substrate. Semiconductor materials are selected for the p-type and n-type pillars that are thermodynamically stable and substantially insoluble in one another. An epitaxial deposition process is employed to form the pillars on a nucleation layer and the mutual insolubility drives phase separation of the materials. During the epitaxial deposition process, the orientation is such that the nucleation layer initiates propagation of vertical columns resulting in a substantially ordered, three-dimensional structure throughout the deposited material. An oxidation state of at least a portion of one of the p-type or the n-type semiconductor materials is altered relative to the other, such that the band-gap energy of the semiconductor materials differ with respect to stoichiometric compositions and the device preferentially absorbs particular selected bands of radiation.

    20. Quantitative interpretation of the transition voltages in gold-poly(phenylene) thiol-gold molecular junctions

      SciTech Connect (OSTI)

      Wu, Kunlin; Bai, Meilin; Hou, Shimin; Sanvito, Stefano

      2013-11-21

      The transition voltage of three different asymmetric Au/poly(phenylene) thiol/Au molecular junctions in which the central molecule is either benzene thiol, biphenyl thiol, or terphenyl thiol is investigated by first-principles quantum transport simulations. For all the junctions, the calculated transition voltage at positive polarity is in quantitative agreement with the experimental values and shows weak dependence on alterations of the Au-phenyl contact. When compared to the strong coupling at the Au-S contact, which dominates the alignment of various molecular orbitals with respect to the electrode Fermi level, the coupling at the Au-phenyl contact produces only a weak perturbation. Therefore, variations of the Au-phenyl contact can only have a minor influence on the transition voltage. These findings not only provide an explanation to the uniformity in the transition voltages found for ?-conjugated molecules measured with different experimental methods, but also demonstrate the advantage of transition voltage spectroscopy as a tool for determining the positions of molecular levels in molecular devices.

    1. Electronic transport through Al/InN nanowire/Al junctions

      DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

      Lu, Tzu -Ming; Wang, George T.; Pan, Wei; Zhao, S.; Mi, Z.

      2016-02-10

      We report non-linear electronic transport measurement of Al/Si-doped n-type InN nanowire/Al junctions performed at T = 0.3 K, below the superconducting transition temperature of the Al electrodes. The proximity effect is observed in these devices through a strong dip in resistance at zero bias. In addition to the resistance dip at zero bias, several resistance peaks can be identified at bias voltages above the superconducting gap of the electrodes, while no resistance dip is observed at the superconducting gap. The resistance peaks disappear as the Al electrodes turn normal beyond the critical magnetic field except one which remains visible atmore » fields several times higher than critical magnetic field. An unexpected non-monotonic magnetic field dependence of the peak position is observed. As a result, we discuss the physical origin of these observations and propose that the resistance peaks could be the McMillan-Rowell oscillations arising from different closed paths localized near different regions of the junctions.« less

    2. Thermal influence on charge carrier transport in solar cells based on GaAs PN junctions

      SciTech Connect (OSTI)

      Osses-Mrquez, Juan; Caldern-Muoz, Williams R.

      2014-10-21

      The electron and hole one-dimensional transport in a solar cell based on a Gallium Arsenide (GaAs) PN junction and its dependency with electron and lattice temperatures are studied here. Electrons and heat transport are treated on an equal footing, and a cell operating at high temperatures using concentrators is considered. The equations of a two-temperature hydrodynamic model are written in terms of asymptotic expansions for the dependent variables with the electron Reynolds number as a perturbation parameter. The dependency of the electron and hole densities through the junction with the temperature is analyzed solving the steady-state model at low Reynolds numbers. Lattice temperature distribution throughout the device is obtained considering the change of kinetic energy of electrons due to interactions with the lattice and heat absorbed from sunlight. In terms of performance, higher values of power output are obtained with low lattice temperature and hot energy carriers. This modeling contributes to improve the design of heat exchange devices and thermal management strategies in photovoltaic technologies.

    3. Solar Energy Science Projects

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      Science Projects Curriculum: Solar Power -(thermodynamics, lightelectromagnetic, radiation, energy transformation, conductionconvection, seasons, trigonometry) Grade Level: ...

    4. Fairbanks Geothermal Energy Project

      Broader source: Energy.gov [DOE]

      Fairbanks Geothermal Energy Project presentation at the April 2013 peer review meeting held in Denver, Colorado.

    5. PROJECT MANGEMENT PLAN EXAMPLES Project Execution Example

      Office of Environmental Management (EM)

      Project Execution Example Example 73 6.3 Project Approach The overall schedule strategy for the PFP project includes ongoing minimum safe activities, combined with stabilization of materials followed by materials disposition, and subsequent transition of the PFP complex to a decommissioned state. The PFP material stabilization baseline was developed using a functionally-based work WBS. The WBS defines all activities required to take each material stream from their current location/conditions

    6. Reynolds Creek Hydroelectric Project, Project Status

      Energy Savers [EERE]

      Hydroelectric Project Project Status November 17, 2009 By : Alvin Edenshaw, President Haida Corporation and Haida Energy, Inc. Mike Stimac, P.E. Vice President, HDR Engineering, Inc. Project Manager November 17, 2009 2 Haida Corporation  Located in Hydaburg on Prince of Wales Island in SE Alaska  Hydaburg population = 350 people (called Kaigani Haida)  Hydaburg is largest Haida Village in Alaska  Subsistence and Commercial Fishing Lifestyle  Substantial Timber Holdings 

    7. January 2016 Project Dashboard

      Broader source: Energy.gov [DOE]

      The Office of Project Management Oversight and Assessments (PM) provides a monthly assessment of DOEs portfolio of capital assets projects, which is summarized in the monthly Project Dashboard report. The current portfolio consists of 32 active projects with established scope, schedule, and cost performance baselines. Based on current performance, projects that are expected to meet their performance baseline are assessed as GREEN, projects that are at-risk of breaching their performance baselines are assessed as YELLOW, and projects that are expected to breach their performance baselines are assessed as RED.

    8. March 2016 Project Dashboard

      Broader source: Energy.gov [DOE]

      The Office of Project Management Oversight and Assessments (PM) provides a monthly assessment of DOE’s portfolio of capital assets projects, which is summarized in the monthly Project Dashboard report. The current portfolio consists of 33 active projects with established scope, schedule, and cost performance baselines. Based on current performance, projects that are expected to meet their performance baseline are assessed as GREEN, projects that are at-risk of breaching their performance baselines are assessed as YELLOW, and projects that are expected to breach their performance baselines are assessed as RED.

    9. December 2015 Project Dashboard

      Broader source: Energy.gov [DOE]

      The Office of Project Management Oversight and Assessments (PM) provides a monthly assessment of DOEs portfolio of capital assets projects, which is summarized in the monthly Project Dashboard report. The current portfolio consists of 32 active projects with established scope, schedule, and cost performance baselines. Based on current performance, projects that are expected to meet their performance baseline are assessed as GREEN, projects that are at-risk of breaching their performance baselines are assessed as YELLOW, and projects that are expected to breach their performance baselines are assessed as RED.

    10. Contract/Project Management

      Office of Environmental Management (EM)

      2 nd Quarter Overall Contract and Project Management Performance Metrics and Targets Contract/Project Management Performance Metrics FY 2009 Target FY 2009 Actual Comment 1. Capital Asset Line Item Projects: 90% of projects completed within 110% of CD-2 TPC by FY11. 80% - Two projects completed in the 2 nd Qtr FY09. This is a 3-year rolling average (FY07 to FY09). 2. EM Cleanup (Soil and Groundwater Remediation, D&D, and Waste Treatment and Disposal) Projects: 90% of EM cleanup projects

    11. Multi-terminal magnetotransport measurements over a tunable graphene p-n junction created by AFM-nanomachining

      SciTech Connect (OSTI)

      Schmidt, H.; Smirnov, D.; Rode, J.; Haug, R. J.

      2013-12-04

      An Atomic Force Microscope is used to alter one part of a single layer graphene sample locally. Transport experiments at low temperatures are then used to characterize the different parts independently with field effect and Hall measurements. It is shown, that the nanomachining leads to an effective doping in the altered area and therefore to a difference in the charge carrier density of ?n = 3.5 ? 10{sup 15}m{sup ?2} between the unchanged and changed part. These two parts can be tuned with a global backgate to form a junction of different polarity, i.e. a p-n junction.

    12. GaN-based vertical-cavity laser performance improvements using tunnel-junction-cascaded active regions

      SciTech Connect (OSTI)

      Piprek, Joachim

      2014-07-07

      This Letter investigates the output power enhancement achieved by tunnel junction insertion into the InGaN multi-quantum well (MQW) active region of a 410?nm vertical-cavity surface-emitting laser which enables the repeated use of carriers for light generation (carrier recycling). While the number of quantum wells remains unchanged, the tunnel junction eliminates absorption caused by the non-uniform MQW carrier distribution. The thermal resistance drops and the excess bias lead to a surprisingly small rise in self-heating.

    13. Observation of Energy Levels Quantization in Underdamped Josephson Junctions above the Classical-Quantum Regime Crossover Temperature

      SciTech Connect (OSTI)

      Silvestrini, P.; Ruggiero, B.; Russo, M.; Silvestrini, P.; Ruggiero, B.; Russo, M.; Palmieri, V.G.

      1997-10-01

      We present a clear observation of the presence of energy levels quantization in high quality Nb-AlO{sub x} -Nb underdamped Josephson junctions at temperatures above the quantum crossover temperature. This has been possible by extending the measurements of the escape rate out of the zero-voltage state at higher sweeping frequency (dI/dt up to 25A/sec) in order to induce nonstationary conditions in the energy potential describing the junction dynamics. {copyright} {ital 1997} {ital The American Physical Society}

    14. Project Reports for Winnebago Tribe- 2014 Project

      Broader source: Energy.gov [DOE]

      Following through with the Winnebago Tribe's commitment to reduce energy usage and consumption, the Winnebago Tribe Solar Project will focus on renewable energy production and energy cost savings...

    15. ARRA Electrification Projects

      Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

      U.S. Department of Energy funded multiple electrification projects through the American Recovery and Reinvestment Act to accelerate the deployment of electric drive vehicles and charging equipment. These included Clean Cities electric drive projects and transportation electrification projects. Use the interactive map above to learn more about the plan and status of the various projects. The U.S. Department of Energy funded multiple electrification projects through the American Recovery and

    16. Four-Junction Solar Cell with 40% Target Efficiency Fabricated by Wafer Bonding and Layer Transfer: Final Technical Report, 1 January 2005 - 31 December 2007

      SciTech Connect (OSTI)

      Atwater, H. A.

      2008-11-01

      We realized high-quality InGaP/GaAs 2-junction top cells on Ge/Si, InGaAs/InP bottom cells, direct-bond series interconnection of tandem cells, and modeling of bonded 3- and 4-junction device performance.

    17. Real-Space Microscopic Electrical Imaging of n+-p Junction Beneath Front-Side Ag Contact of Multicrystalline Si Solar Cells

      SciTech Connect (OSTI)

      Jiang, C. S.; Li, Z. G.; Moutinho, H. R.; Liang, L.; Ionkin, A.; Al-Jassim, M. M.

      2012-04-15

      We investigated the quality of the n+-p diffused junction beneath the front-side Ag contact of multicrystalline Si solar cells by characterizing the uniformities of electrostatic potential and doping concentration across the junction using the atomic force microscopy-based electrical imaging techniques of scanning Kelvin probe force microscopy and scanning capacitance microscopy. We found that Ag screen-printing metallization fired at the over-fire temperature significantly degrades the junction uniformity beneath the Ag contact grid, whereas metallization at the optimal- and under-fire temperatures does not cause degradation. Ag crystallites with widely distributed sizes were found at the Ag-grid/emitter-Si interface of the over-fired cell, which is associated with the junction damage beneath the Ag grid. Large crystallites protrude into Si deeper than the junction depth. However, the junction was not broken down; instead, it was reformed on the entire front of the crystallite/Si interface. We propose a mechanism of junction-quality degradation, based on emitter Si melting at the temperature around the Ag-Si eutectic point during firing, and subsequent re-crystallization with incorporation of Ag and other impurities and with formation of crystallographic defects during quenching. The effect of this junction damage on solar cell performance is discussed.

    18. DOE Amends Decision for the Remediation of the Moab Uranium Mill Tailings in Moab, Utah

      Broader source: Energy.gov [DOE]

      WASHINGTON, DC - The U.S. Department of Energy (DOE) today announced an amendment to its 2005 Record of Decision (ROD) for the Moab Uranium Mill Tailings Remedial Action (UMTRA) Project to allow...

    19. DOE - Office of Legacy Management -- SLC_P

      Office of Legacy Management (LM)

      Compliance Action Plan for the Salt Lake City, Utah UMTRA Project Site Long-Term Management Plan for the Salt Lake City, Utah, (UMTRCA Title I) Processing Site Notice of...

    20. Contract/Project Management

      Office of Environmental Management (EM)

      8 4 th Quarter Metrics Final Overall Contract and Project Management Performance Metrics and Targets Contract/Project Management Performance Metrics FY 2008 Target FY 2008 Actual Comment 1. Capital Asset Line Item Projects: 90% of projects completed within 110% of CD-2 TPC by FY11. 75% 76% This is a 3-year rolling average Data includes FY06 to FY08. (37/48) 2. EM Cleanup (Soil and Groundwater Remediation, D&D, and Waste Treatment and Disposal) Projects: 90% of EM cleanup projects complete

    1. Contract/Project Management

      Office of Environmental Management (EM)

      1 st Quarter Overall Contract and Project Management Performance Metrics and Targets Contract/Project Management Performance Metrics FY 2009 Target FY 2009 Actual Comment 1. Capital Asset Line Item Projects: 90% of projects completed within 110% of CD-2 TPC by FY11. 80% - No 1 st Qtr FY09 completions. This is a 3-year rolling average (FY07 to FY09). 2. EM Cleanup (Soil and Groundwater Remediation, D&D, and Waste Treatment and Disposal) Projects: 90% of EM cleanup projects complete 80% of

    2. Contract/Project Management

      Office of Environmental Management (EM)

      3 rd Quarter Overall Contract and Project Management Performance Metrics and Targets Contract/Project Management Performance Metrics FY 2009 Target FY 2009 Actual Comment 1. Capital Asset Line Item Projects: 90% of projects completed within 110% of CD-2 TPC by FY11. 80% 72% This is a 3-year rolling average (FY07 to FY09). No 3 rd qtr FY09 completions. 2. EM Cleanup (Soil and Groundwater Remediation, D&D, and Waste Treatment and Disposal) Projects: 90% of EM cleanup projects complete 80% of

    3. Contract/Project Management

      Office of Environmental Management (EM)

      4 th Quarter Metrics Final Overall Contract and Project Management Performance Metrics and Targets Contract/Project Management Performance Metrics FY 2009 Target FY 2009 Actual Comment 1. Capital Asset Line Item Projects: 90% of projects completed within 110% of CD-2 TPC by FY11. 80% 73% This is a 3-year rolling average (FY07 to FY09). 2. EM Cleanup (Soil and Groundwater Remediation, D&D, and Waste Treatment and Disposal) Projects: 90% of EM cleanup projects complete 80% of scope within 125%

    4. Contract/Project Management

      Office of Environmental Management (EM)

      1 st Quarter Overall Contract and Project Management Performance Metrics and Targets 1 Contract/Project Management Primary Performance Metrics FY 2010 Target 1st Qtr FY 2010 Actual FY 2010 Pre- & Post-CAP Comment 1a. Capital Asset Line Item Projects: (Pre-RCA/CAP) 90% of projects completed within 110% of CD-2 TPC by FY11. 1b. Capital Asset Line Item Projects: (Post-RCA/CAP) 85% Line Item 73% Line Item 70% Pre-CAP 100% Post-CAP This is a projection based on a 3-year rolling average (FY08 to

    5. Contract/Project Management

      Office of Environmental Management (EM)

      Second Quarter Overall Contract and Project Management Performance Metrics and Targets 1 Contract/Project Management Primary Performance Metrics FY 2010 Target FY 2010 Actual FY 2010 Pre- & Post-CAP Comment 1a. Capital Asset Line Item Projects: (Pre-RCA/CAP) 90% of projects completed within 110% of CD-2 TPC by FY11. 1b. Capital Asset Line Item Projects: (Post-RCA/CAP) 85% Line Item 73% Line Item 70% Pre-CAP 100% Post-CAP This is a projection based on a 3-year rolling average (FY08 to FY10).

    6. Contract/Project Management

      Office of Environmental Management (EM)

      Third Quarter Overall Contract and Project Management Performance Metrics and Targets 1 Contract/Project Management Primary Performance Metrics FY 2010 Target FY 2010 Forecast FY 2010 Pre- & Post-CAP Comment 1a. Capital Asset Line Item Projects: (Pre-RCA/CAP) 90% of projects completed within 110% of CD-2 TPC by FY11. 1b. Capital Asset Line Item Projects: (Post-RCA/CAP) 85% Line Item 71% Line Item 70% Pre-CAP 100% Post-CAP This is a projection based on a 3-year rolling average (FY08 to FY10).

    7. The benzene metabolite trans,trans-muconaldehyde blocks gap junction intercellular communication by cross-linking connexin43

      SciTech Connect (OSTI)

      Rivedal, Edgar Leithe, Edward

      2008-11-01

      Benzene is used at large volumes in many different human activities. Hematotoxicity and cancer-causation as a result of benzene exposure was recognized many years ago, but the mechanisms involved remain unclear. Aberrant regulation of gap junction intercellular communication (GJIC) has been linked to both cancer induction and interference with normal hematopoietic development. We have previously suggested that inhibition of GJIC may play a role in benzene toxicity since benzene metabolites were found to block GJIC, the ring-opened trans,trans-muconaldehyde (MUC) being the most potent metabolite. In the present work we have studied the molecular mechanisms underlying the MUC-induced inhibition of gap junctional communication. We show that MUC induces cross-linking of the gap junction protein connexin43 and that this is likely to be responsible for the induced inhibition of GJIC, as well as the loss of connexin43 observed in Western blots. We also show that glutaraldehyde possesses similar effects as MUC, and we compare the effects to that of formaldehyde. The fact that glutaraldehyde and formaldehyde have been associated with induction of leukemia as well as disturbance of hematopoiesis, strengthens the possible link between the effect of MUC on gap junctions, and the toxic effects of benzene.

    8. High Efficiency Amorphous and Microcrystalline Silicon Based Double-Junction Solar Cells made with Very-High-Frequency Glow Discharge

      SciTech Connect (OSTI)

      Banerjee, Arindam

      2004-10-20

      We have achieved a total-area initial efficiency of 11.47% (active-area efficiency of 12.33%) on a-Si:H/?c-Si:H double-junction structure, where the intrinsic layer bottom cell was made in 50 minutes. On another device in which the bottom cell was made in 30 min, we achieved initial total-area efficiency of 10.58% (active-efficiency of 11.35%). We have shown that the phenomenon of ambient degradation of both ?c-Si:H single-junction and a-Si:H/?c-Si:H double-junction cells can be attributed to impurity diffusion after deposition. Optimization of the plasma parameters led to alleviation of the ambient degradation. Appropriate current matching between the top and bottom component cells has resulted in a stable total-area efficiency of 9.7% (active-area efficiency of 10.42%) on an a-Si:H/?c-Si:H double-junction solar cell in which the deposition time for the ?c-Si:H intrinsic layer deposition was of 30 min.

    9. Designing π-stacked molecular structures to control heat transport through molecular junctions

      SciTech Connect (OSTI)

      Kiršanskas, Gediminas; Li, Qian; Solomon, Gemma C.; Flensberg, Karsten; Leijnse, Martin

      2014-12-08

      We propose and analyze a way of using π stacking to design molecular junctions that either enhance or suppress a phononic heat current, but at the same time remain conductors for an electric current. Such functionality is highly desirable in thermoelectric energy converters, as well as in other electronic components where heat dissipation should be minimized or maximized. We suggest a molecular design consisting of two masses coupled to each other with one mass coupled to each lead. By having a small coupling (spring constant) between the masses, it is possible to either reduce or perhaps more surprisingly enhance the phonon conductance. We investigate a simple model system to identify optimal parameter regimes and then use first principle calculations to extract model parameters for a number of specific molecular realizations, confirming that our proposal can indeed be realized using standard molecular building blocks.

    10. Origin of the smaller conductances of Rh, Pb, and Co atomic junctions in hydrogen environment

      SciTech Connect (OSTI)

      Li, Xue; Chen, Mingyan; Ye, Xiang; Xie, Yi-qun; Ke, San-huang

      2015-02-14

      We study theoretically the structural and electronic origins of the smaller conductances (one conductance quantum, G{sub 0}, and smaller) of Rh, Pb, and Co metal atomic junctions (MAJs) in a hydrogen environment, as were measured in recent experiments. For the Rh MAJs, the 1G{sub 0} conductance is attributed to a stable contact bridged by a single hydrogen molecule whose antibonding state provides a single transport channel. For the Pb and Co MAJs the 1G{sub 0} conductance is, however, ascribed to a linear atomic chain adsorbing two dissociated H atoms, which largely reduces the density of states at the Fermi energy with respect to the pure ones. On the other hand, the small conductances of 0.3G{sub 0} (Rh) and 0.2G{sub 0} (Co) are due to H-decorated atomic chains connected to electrodes by a H atom.

    11. A 2-terminal perovskite/silicon multijunction solar cell enabled by a silicon tunnel junction

      DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

      Mailoa, Jonathan P.; Bailie, Colin D.; Johlin, Eric C.; Hoke, Eric T.; Akey, Austin J.; Nguyen, William H.; McGehee, Michael D.; Buonassisi, Tonio

      2015-03-24

      With the advent of efficient high-bandgap metal-halide perovskite photovoltaics, an opportunity exists to make perovskite/silicon tandem solar cells. We fabricate a monolithic tandem by developing a silicon-based interband tunnel junction that facilitates majority-carrier charge recombination between the perovskite and silicon sub-cells. We demonstrate a 1 cm2 2-terminal monolithic perovskite/silicon multijunction solar cell with a VOC as high as 1.65 V. As a result, we achieve a stable 13.7% power conversion efficiency with the perovskite as the current-limiting sub-cell, and identify key challenges for this device architecture to reach efficiencies over 25%.

    12. Mode-hopping mechanism generating colored noise in a magnetic tunnel junction based spin torque oscillator

      SciTech Connect (OSTI)

      Sharma, Raghav; Drrenfeld, P.; Iacocca, E.; Heinonen, O. G.; kerman, J.; Muduli, P. K.

      2014-09-29

      The frequency noise spectrum of a magnetic tunnel junction based spin torque oscillator is examined where multiple modes and mode-hopping events are observed. The frequency noise spectrum is found to consist of both white noise and 1/f frequency noise. We find a systematic and similar dependence of both white noise and 1/f frequency noise on bias current and the relative angle between the reference and free layers, which changes the effective damping and hence the mode-hopping behavior in this system. The frequency at which the 1/f frequency noise changes to white noise increases as the free layer is aligned away from the anti-parallel orientation w.r.t the reference layer. These results indicate that the origin of 1/f frequency noise is related to mode-hopping, which produces both white noise as well as 1/f frequency noise similar to the case of ring lasers.

    13. Macroscopic quantum tunneling in small Josephson junctions in a magnetic field.

      SciTech Connect (OSTI)

      Ovchinnikov, Yu. N.; Barone, A.; Varlamov, A. A.; Materials Science Division; Max-Planck Inst. for Physics of Complex Systems; Landau Inst. Theoretical Physics; Univ. di Napoli Federico II; Coherentia-INFM, CNR

      2007-01-01

      We study the phenomenon of macroscopic quantum tunneling (MQT) in small Josephson junctions (JJ) with an externally applied magnetic field. The latter results in the appearance of the Fraunhofer type modulation of the current density along the barrier. The problem of MQT for a pointlike JJ is reduced to the motion of the quantum particle in the washboard potential. In the case of a finite size JJ under consideration, this problem corresponds to a MQT in a potential which itself, besides the phase, depends on space variables. The general expression for the crossover temperature To between thermally activated and macroscopic quantum tunneling regimes and the escaping time {tau}{sub esc} have been calculated.

    14. Traveling wave parametric amplifier with Josephson junctions using minimal resonator phase matching

      SciTech Connect (OSTI)

      White, T. C.; Mutus, J. Y.; Hoi, I.-C.; Barends, R.; Campbell, B.; Chen, Yu; Chen, Z.; Chiaro, B.; Dunsworth, A.; Jeffrey, E.; Kelly, J.; Neill, C.; O'Malley, P. J. J.; Roushan, P.; Sank, D.; Vainsencher, A.; Wenner, J.; Martinis, John M.; Megrant, A.; Chaudhuri, S.; and others

      2015-06-15

      Josephson parametric amplifiers have become a critical tool in superconducting device physics due to their high gain and quantum-limited noise. Traveling wave parametric amplifiers (TWPAs) promise similar noise performance, while allowing for significant increases in both bandwidth and dynamic range. We present a TWPA device based on an LC-ladder transmission line of Josephson junctions and parallel plate capacitors using low-loss amorphous silicon dielectric. Crucially, we have inserted ?/4 resonators at regular intervals along the transmission line in order to maintain the phase matching condition between pump, signal, and idler and increase gain. We achieve an average gain of 12?dB across a 4?GHz span, along with an average saturation power of ?92 dBm with noise approaching the quantum limit.

    15. A 2-terminal perovskite/silicon multijunction solar cell enabled by a silicon tunnel junction

      SciTech Connect (OSTI)

      Mailoa, Jonathan P.; Bailie, Colin D.; Johlin, Eric C.; Hoke, Eric T.; Akey, Austin J.; Nguyen, William H.; McGehee, Michael D.; Buonassisi, Tonio

      2015-03-24

      With the advent of efficient high-bandgap metal-halide perovskite photovoltaics, an opportunity exists to make perovskite/silicon tandem solar cells. We fabricate a monolithic tandem by developing a silicon-based interband tunnel junction that facilitates majority-carrier charge recombination between the perovskite and silicon sub-cells. We demonstrate a 1 cm2 2-terminal monolithic perovskite/silicon multijunction solar cell with a VOC as high as 1.65 V. As a result, we achieve a stable 13.7% power conversion efficiency with the perovskite as the current-limiting sub-cell, and identify key challenges for this device architecture to reach efficiencies over 25%.

    16. High performance anti-reflection coatings for broadband multi-junction solar cells

      SciTech Connect (OSTI)

      AIKEN,DANIEL J.

      2000-02-23

      The success of bandgap engineering has made high efficiency broadband multi-junction solar cells possible with photo-response out to the band edge of Ge. Modeling has been conducted which suggests that current double layer anti-reflection coating technology is not adequate for these devices in certain cases. Approaches for the development of higher performance anti-reflection coatings are examined. A new AR coating structure based on the use of Herpin equivalent layers is presented. Optical modeling suggests a decrease in the solar weighted reflectance of over 2.5{percent} absolute as a result. This structure requires no additional optical material development and characterization because no new optical materials are necessary. Experimental results and a sensitivity analysis are presented.

    17. Tuning the thickness of electrochemically grafted layers in large area molecular junctions

      SciTech Connect (OSTI)

      Fluteau, T.; Bessis, C.; Barraud, C. Della Rocca, M. L.; Lafarge, P.; Martin, P.; Lacroix, J.-C.

      2014-09-21

      We have investigated the thickness, the surface roughness, and the transport properties of oligo(1-(2-bisthienyl)benzene) (BTB) thin films grafted on evaporated Au electrodes, thanks to a diazonium-based electro-reduction process. The thickness of the organic film is tuned by varying the number of electrochemical cycles during the growth process. Atomic force microscopy measurements reveal the evolution of the thickness in the range of 227 nm. Its variation displays a linear dependence with the number of cycles followed by a saturation attributed to the insulating behavior of the organic films. Both ultrathin (2 nm) and thin (12 and 27 nm) large area BTB-based junctions have then been fabricated using standard CMOS processes and finally electrically characterized. The electronic responses are fully consistent with a tunneling barrier in case of ultrathin BTB film whereas a pronounced rectifying behavior is reported for thicker molecular films.

    18. Giant electrocaloric effect in asymmetric ferroelectric tunnel junctions at room temperature

      SciTech Connect (OSTI)

      Liu, Yang Infante, Ingrid C.; Dkhil, Brahim; Lou, Xiaojie

      2014-02-24

      Room-temperature electrocaloric properties of Pt/BaTiO{sub 3}/SrRuO{sub 3} ferroelectric tunnel junctions (FTJs) are studied by using a multiscale thermodynamic model. It is found that there is a divergence in the adiabatic temperature change ΔT for the two opposite polarization orientations. This difference under a typical writing voltage of 3 V can reach over 1 K as the barrier thickness decreases. Thanks to the ultrahigh external stimulus, a giant electrocaloric effect (1.53 K/V) with ΔT being over 4.5 K can be achieved at room temperature, which demonstrates the perspective of FTJs as a promising solid-state refrigeration.

    19. Influence of quasiparticle multi-tunneling on the energy flow through the superconducting tunnel junction

      SciTech Connect (OSTI)

      Samedov, V. V.; Tulinov, B. M.

      2011-07-01

      Superconducting tunnel junction (STJ) detector consists of two layers of superconducting material separated by thin insulating barrier. An incident particle produces in superconductor excess nonequilibrium quasiparticles. Each quasiparticle in superconductor should be considered as quantum superposition of electron-like and hole-like excitations. This duality nature of quasiparticle leads to the effect of multi-tunneling. Quasiparticle starts to tunnel back and forth through the insulating barrier. After tunneling from biased electrode quasiparticle loses its energy via phonon emission. Eventually, the energy that equals to the difference in quasiparticle energy between two electrodes is deposited in the signal electrode. Because of the process of multi-tunneling, one quasiparticle can deposit energy more than once. In this work, the theory of branching cascade processes was applied to the process of energy deposition caused by the quasiparticle multi-tunneling. The formulae for the mean value and variance of the energy transferred by one quasiparticle into heat were derived. (authors)

    20. Interfacial electronic transport phenomena in single crystalline Fe-MgO-Fe thin barrier junctions

      SciTech Connect (OSTI)

      Gangineni, R. B.; Negulescu, B.; Baraduc, C.; Gaudin, G.

      2014-05-05

      Spin filtering effects in nano-pillars of Fe-MgO-Fe single crystalline magnetic tunnel junctions are explored with two different sample architectures and thin MgO barriers (thickness: 3–8 monolayers). The two architectures, with different growth and annealing conditions of the bottom electrode, allow tuning the quality of the bottom Fe/MgO interface. As a result, an interfacial resonance states (IRS) is observed or not depending on this interface quality. The IRS contribution, observed by spin polarized tunnel spectroscopy, is analyzed as a function of the MgO barrier thickness. Our experimental findings agree with theoretical predictions concerning the symmetry of the low energy (0.2 eV) interfacial resonance states: a mixture of Δ{sub 1}-like and Δ{sub 5}-like symmetries.

    1. Three-terminal magnetic tunneling junction device with perpendicular anisotropy CoFeB sensing layer

      SciTech Connect (OSTI)

      Honjo, H. Nebashi, R.; Tokutome, K.; Miura, S.; Sakimura, N.; Sugibayashi, T.; Fukami, S.; Kinoshita, K.; Murahata, M.; Kasai, N.; Ishihara, K.; Ohno, H.

      2014-05-07

      We demonstrated read and write characteristics of a three terminal memory device with a perpendicular anisotropy-free layer of a strip of [Co/Ni] and a low-switching perpendicular-anisotropy CoFeB/MgO sensing layer. This new design of the cell results in a small cell area. The switching magnetic field of the sensing layer can be decreased by changing sputtering gas for the Ta-cap from Ar to Kr. An electron energy-loss spectroscopy analysis of the cross-section of the magnetic tunneling junction (MTJ) revealed that the boron content in CoFeB with a Kr-sputtered Ta-cap was smaller than that with an Ar-sputtered one. A change in resistance for the MTJ was observed that corresponded to the magnetic switching of the Co/Ni wire and its magnetoresistance ratio and critical current were 90% and 0.8 mA, respectively.

    2. Controllable 0 − π transition in iron pnictide superconductor junctions with a spacer of strong ferromagnet

      SciTech Connect (OSTI)

      Liu, S. Y.; Tao, Y. C. Ji, T. T.; Di, Y. S.; Hu, J. G.

      2014-03-17

      We investigate the control of 0−π transition in Josephson junctions consisting of a highly spin-polarized ferromagnet coupled to two iron pnictide superconductors (SCs). It is shown that, a 0−π transition as a function of interband coupling strength is always exhibited, which can be experimentally used to discriminate the s{sub ±}-wave pairing symmetry in the iron pnictide SCs from the s{sub ++}-wave one in MgB{sub 2}. By tuning the doping level in the s{sub ±}-wave SCs, one can vary the interband coupling strength so as to obtain the controllable 0−π transition. This device may be realized with current technologies and has practical use in Cooper pair spintronics and quantum information.

    3. A quasi-classical mapping approach to vibrationally coupled electron transport in molecular junctions

      SciTech Connect (OSTI)

      Li, Bin; Miller, William H.; Wilner, Eli Y.; Thoss, Michael

      2014-03-14

      We develop a classical mapping approach suitable to describe vibrationally coupled charge transport in molecular junctions based on the Cartesian mapping for many-electron systems [B. Li and W. H. Miller, J. Chem. Phys. 137, 154107 (2012)]. To properly describe vibrational quantum effects in the transport characteristics, we introduce a simple transformation rewriting the Hamiltonian in terms of occupation numbers and use a binning function to facilitate quantization. The approach provides accurate results for the nonequilibrium Holstein model for a range of bias voltages, vibrational frequencies, and temperatures. It also captures the hallmarks of vibrational quantum effects apparent in step-like structure in the current-voltage characteristics at low temperatures as well as the phenomenon of Franck-Condon blockade.

    4. Edge-channel interferometer at the graphene quantum Hall pn junction

      SciTech Connect (OSTI)

      Morikawa, Sei; Moriya, Rai; Masubuchi, Satoru Machida, Tomoki; Watanabe, Kenji; Taniguchi, Takashi

      2015-05-04

      We demonstrate a quantum Hall edge-channel interferometer in a high-quality graphene pn junction under a high magnetic field. The co-propagating p and n quantum Hall edge channels traveling along the pn interface functions as a built-in Aharonov-Bohm-type interferometer, the interferences in which are sensitive to both the external magnetic field and the carrier concentration. The trajectories of peak and dip in the observed resistance oscillation are well reproduced by our numerical calculation that assumes magnetic flux quantization in the area enclosed by the co-propagating edge channels. Coherent nature of the co-propagating edge channels is confirmed by the checkerboard-like pattern in the dc-bias and magnetic-field dependences of the resistance oscillations.

    5. Comparison of Theoretical Efficiencies of Multi-junction Concentrator Solar Cells

      SciTech Connect (OSTI)

      Kurtz, S.; Myers, D.; McMahon, W. E.; Geisz, J.; Steiner, M.

      2008-01-01

      Champion concentrator cell efficiencies have surpassed 40% and now many are asking whether the efficiencies will surpass 50%. Theoretical efficiencies of >60% are described for many approaches, but there is often confusion about the theoretical efficiency for a specific structure. The detailed balance approach to calculating theoretical efficiency gives an upper bound that can be independent of material parameters and device design. Other models predict efficiencies that are closer to those that have been achieved. Changing reference spectra and the choice of concentration further complicate comparison of theoretical efficiencies. This paper provides a side-by-side comparison of theoretical efficiencies of multi-junction solar cells calculated with the detailed balance approach and a common one-dimensional-transport model for different spectral and irradiance conditions. Also, historical experimental champion efficiencies are compared with the theoretical efficiencies.

    6. Moab Mill Tailings Removal Project Plans to Resume Train Shipments in March; All of the Laid Off Workers Will Return

      Broader source: Energy.gov [DOE]

      Grand Junction, CO ― All 27 employees of the Remedial Action Contractor (RAC) to the U.S. Department of Energy will return to work on the Uranium Mill Tailings Remedial Action Project on March 4, following a 3-month planned furlough. Project shipping and disposal operations have been shut down, as planned, since late November 2012, but are scheduled to resume March 7, after the contractor ensures employees have received refresher training, reviewed procedures, and measures are in place for a safe startup.

    7. Sample Project Execution Plan

      Broader source: Energy.gov [DOE]

      The project execution plan (PEP) is the governing document that establishes the means to execute, monitor, and control projects.  The plan serves as the main communication vehicle to ensure that...

    8. Haida Corporation- 2010 Project

      Broader source: Energy.gov [DOE]

      The Reynolds Creek Hydroelectric Project ("Reynolds Creek" or the "Project") is a 5 MW hydroelectric resource to be constructed on Prince of Wales Island, Alaska, approximately 10 miles east of Hydaburg.

    9. Contract/Project Management

      Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

      within 110% of CD-2 TPC by FY11. 80% 72% This is a 3-year rolling average (FY07 to FY09). ... projects. 3. Certified EVM Systems: Post CD-3, 95% of line item projects and EM cleanup ...

    10. Information Technology Project Management

      Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

      2012-12-03

      The Order provides program and project management direction for the acquisition and management of IT projects, investments, and initiatives. Cancels DOE G 200.1-1. Admin Chg 1 approved 1-16-2013.

    11. Contract/Project Management

      Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

      1 ContractProject Management Primary Performance Metrics FY 2011 Target FY 2011 Actual FY 2011 Pre- & Post-CAP Actual Comment 1a. Capital Asset Line Item Projects: ...

    12. Contract/Project Management

      Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

      1 ContractProject Management Primary Performance Metrics FY 2011 Target FY 2011 Actual & Forecast FY 2011 Pre- & Post-CAP Comment 1a. Capital Asset Line Item Projects: ...

    13. Contract/Project Management

      Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

      Targets 1 ContractProject Management Primary Performance Metrics FY 2010 Target FY 2010 Actual FY 2010 Pre- & Post-CAP Comment 1a. Capital Asset Line Item Projects: (Pre-RCA...

    14. Contract/Project Management

      Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

      1 ContractProject Management Primary Performance Metrics FY 2011 Target FY 2011 Forecast FY 2011 Pre- & Post-CAP Forecast Comment 1a. Capital Asset Line Item Projects: ...

    15. Improving Project Management

      Office of Environmental Management (EM)

      Improving Project Management Report of the Contract and Project Management Working Group November 2014 1 TABLE OF CONTENTS 1. Foreword ........................................................................................................................................................................... 2 2. Executive Summary ...................................................................................................................................................... 3 2.1 Summary of

    16. Acquisition and Project Management

      National Nuclear Security Administration (NNSA)

      4%2A en Acquisition and Project Management Office volunteers get up-close look at Office of Secure Transportation exercise http:nnsa.energy.govblogacquisition-and-project-mana...

    17. GHPsRUS Project

      DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

      Battocletti, Liz

      The GHPsRUS Project's full name is "Measuring the Costs and Benefits of Nationwide Geothermal Heat Pump Deployment." The dataset contains employment and installation price data collected by four economic surveys: (1)GHPsRUS Project Manufacturer & OEM Survey, (2) GHPsRUS Project Geothermal Loop Survey, (3) GHPsRUS Project Mechanical Equipment Installation Survey, and (4) GHPsRUS Geothermal Heat Pump Industry Survey

    18. GHPsRUS Project

      SciTech Connect (OSTI)

      Battocletti, Liz

      2013-07-09

      The GHPsRUS Project's full name is "Measuring the Costs and Benefits of Nationwide Geothermal Heat Pump Deployment." The dataset contains employment and installation price data collected by four economic surveys: (1)GHPsRUS Project Manufacturer & OEM Survey, (2) GHPsRUS Project Geothermal Loop Survey, (3) GHPsRUS Project Mechanical Equipment Installation Survey, and (4) GHPsRUS Geothermal Heat Pump Industry Survey

    19. WIPP Projects Interative Map

      Broader source: Energy.gov [DOE]

      View WIPP Projects in a larger map. To report corrections, please email WeatherizationInnovation@ee.doe.gov.

    20. Mentors and Projects

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      Mentors, Projects Mentors and Projects Bringing together top space science students with internationally recognized researchers at Los Alamos in an educational, collaborative atmosphere Contacts Director Misa Cowee Email Administrative Assistant Mary Wubbena Email Request more information Email Students work closely with their mentors, who are Laboratory scientists, on challenging research projects in the Space Weather Summer School. Projects are related to current research topics in space

    1. Step 2: Project Options

      Energy Savers [EERE]

      2: Project Options 2 2 Design 1 Potential 3 Refinement 4 Implementation 2 Options 5 Operations & Maintenance 1/28/2016 2 Presentation Agenda * Step 2: Project Options * Project members and roles * Activity * Project ownership options - Interconnection, net metering, permitting, and considerations * Tools * Case in Point 3 Potential Options Refinement Implementation Operations & Maintenance 4 Step 2: Roles, Business Structures, & Regulatory Considerations Purpose: Determine ownership

    2. Red Lake Weatherization Project

      Energy Savers [EERE]

      REVIEW RED LAKE WEATHERIZATION PROJECT BERT VAN WERT ENERGY ACTIVITIES COORDINATOR Project Overview To develop the capacity to conduct energy audits Implement energy efficiency measures into Tribal homes Develop a Tribally administered Energy Efficiency Program and business PROJECT LOCATION Our project is located at Red Lake Housing Authority Red Lake Band of Chippewa Indians Red Lake , MN Red Lake Band of Chippewas Area overview Reservation (Diminished Lands) and Surroundings Red Lake Band of

    3. Step 4: Project Implementation

      Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

      4: Project Implementation Project Implementation 2 1 Potential 3 Refinement 5 Operations & Maintenance 2 Options 4 Implementation Step 4: Implementation 3 1 Potential 3 Refinement 5 Operations & Maintenance 2 Options 4 Implementation Step 4: Implementation 1. Pre-construction - Project kickoff - Design and construction documents, plans/schedules, submittals 2. Construction of project - Contract oversight/quality control - Change control 3. Commissioning - Testing and verification -

    4. Project Reports for Pawnee Nation- 2006 Project

      Broader source: Energy.gov [DOE]

      The primary goal of this project is to move the energy vision of the Pawnee Nation forward by conducting specific data collection and analysis tasks to assess the viable options available to Pawnee to meet future energy needs sustainable.

    5. Project Reports for Hualapai Tribe- 2010 Project

      Broader source: Energy.gov [DOE]

      The project will build on the potential for renewable energy development on the Hualapai Reservation that was identified during the Phase l renewable energy resource assessment conducted by the Hualapai Tribe since 2005.

    6. MHK Projects/Tensas | Open Energy Information

      Open Energy Info (EERE)

      ","visitedicon":"" Project Profile Project Start Date 112009 Project City Butte la Rose, LA Project StateProvince Louisiana Project Country United States Project Resource...

    7. Desert Peak EGS Project

      Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

      Desert Peak EGS Project DOE Award: DE-FC6-02ID14406 Ethan Chabora GeothermEx, a Schlumberger Company Ezra Zemach Ormat Nevada Inc. Project Officer: Bill Vandermeer Total Project Funding: $7.6M April 22nd, 2013 This presentation does not contain any proprietary confidential, or otherwise restricted information. Insert photo of your choice 2 | US DOE Geothermal Program eere.energy.gov - Timeline * Project start date: September 2002 * Project end date: Q3 2013 * Percentage complete: 90% - Budget *

    8. Contract/Project Management

      Office of Environmental Management (EM)

      3 First Quarter Overall Contract and Project Management Improvement Performance Metrics and Targets 1 Contract/Project Management Performance Metric FY 2013 Target FY 2013 Final FY 2013 Pre- & Post-CAP Final Comment Capital Asset Project Success: Complete 90% of capital asset projects at original scope and within 110% of CD-2 TPC. 90%* 83% Construction 86% Cleanup 80% 70% Pre-CAP 84% Post-CAP This is based on a 3- year rolling average (FY11 to FY13). TPC is Total Project Cost.

    9. Contract/Project Management

      Office of Environmental Management (EM)

      Fourth Quarter Overall Root Cause Analysis (RCA)/Corrective Action Plan (CAP) Performance Metrics 1 Contract/Project Management Performance Metric FY 2013 Target FY 2013 Actual FY 2013 Pre- & Post-CAP* Actual Comment Capital Asset Project Success: Complete 90% of capital asset projects at original scope and within 110% of CD-2 TPC. 90% 83% Construction 84% Cleanup 82% 70% Pre-CAP 84% Post-CAP Based on 3-year rolling period (FY11 to FY13) of 93 projects. TPC is Total Project Cost.

    10. Contract/Project Management

      Office of Environmental Management (EM)

      Fourth Quarter Overall Contract and Project Management Performance Metrics and Targets 1 Contract/Project Management Primary Performance Metrics FY 2010 Target FY 2010 Actual FY 2010 Pre- & Post-CAP Comment 1a. Capital Asset Line Item Projects: (Pre-RCA/CAP) 90% of projects completed within 110% of CD-2 TPC by FY11. 1b. Capital Asset Line Item Projects: (Post-RCA/CAP) 85% Line Item 69% Line Item 67% Pre-CAP 100% Post-CAP This is based on a 3-year rolling average (FY08 to FY10). TPC is Total

    11. Contract/Project Management

      Office of Environmental Management (EM)

      First Quarter Overall Contract and Project Management Performance Metrics and Targets 1 Contract/Project Management Primary Performance Metrics FY 2011 Target FY 2011 Actual & Forecast FY 2011 Pre- & Post-CAP Comment 1a. Capital Asset Line Item Projects: (Pre-RCA/CAP) Projects completed within 110% of CD-2 TPC. 1b. Capital Asset Line Item Projects: (Post-RCA/CAP) 90% Line Item 79% Line Item 71% Pre-CAP 100% Post-CAP This is based on a 3-year rolling average (FY09 to FY11). TPC is Total

    12. Contract/Project Management

      Office of Environmental Management (EM)

      Second Quarter Overall Contract and Project Management Improvement Performance Metrics and Targets 1 Contract/Project Management Primary Performance Metrics FY 2011 Target FY 2011 Forecast FY 2011 Pre- & Post-CAP Forecast Comment 1a. Capital Asset Line Item Projects: (Pre-RCA/CAP) Projects completed within 110% of CD-2 TPC. 1b. Capital Asset Line Item Projects: (Post-RCA/CAP) 90% Line Item 84% Line Item 78% Pre-CAP 100% Post-CAP This is based on a 3-year rolling average (FY09 to FY11). TPC

    13. Contract/Project Management

      Office of Environmental Management (EM)

      Third Quarter Overall Contract and Project Management Improvement Performance Metrics and Targets 1 Contract/Project Management Primary Performance Metrics FY 2011 Target FY 2011 Forecast FY 2011 Pre- & Post-CAP Forecast Comment 1a. Capital Asset Line Item Projects: (Pre-RCA/CAP) Projects completed within 110% of CD-2 TPC. 1b. Capital Asset Line Item Projects: (Post-RCA/CAP) 90% Line Item 84% Line Item 78% Pre-CAP 100% Post-CAP This is based on a 3-year rolling average (FY09 to FY11). TPC is

    14. Contract/Project Management

      Office of Environmental Management (EM)

      Fourth Quarter Overall Contract and Project Management Improvement Performance Metrics and Targets 1 Contract/Project Management Primary Performance Metrics FY 2011 Target FY 2011 Actual FY 2011 Pre- & Post-CAP Actual Comment 1a. Capital Asset Line Item Projects: (Pre-RCA/CAP) Projects completed within 110% of CD-2 TPC. 1b. Capital Asset Line Item Projects: (Post-RCA/CAP) 90% Line Item 84% Line Item 77% Pre-CAP 100% Post-CAP This is based on a 3-year rolling average (FY09 to FY11). TPC is

    15. Contract/Project Management

      Office of Environmental Management (EM)

      First Quarter Overall Contract and Project Management Improvement Performance Metrics and Targets 1 Contract/Project Management Performance Metric FY 2012 Target FY 2012 Forecast FY 2012 Pre- & Post-CAP Forecast Comment Capital Asset Project Success: Complete 90% of capital asset projects at original scope and within 110% of CD-2 TPC. 90%* 84% Construction 83% Cleanup 85% 77% Pre-CAP 86% Post- CAP This is based on a 3- year rolling average (FY10 to FY12). TPC is Total Project Cost.

    16. Contract/Project Management

      Office of Environmental Management (EM)

      Second Quarter Overall Contract and Project Management Improvement Performance Metrics and Targets 1 Contract/Project Management Performance Metric FY 2012 Target FY 2012 Forecast FY 2012 Pre- & Post-CAP Forecast Comment Capital Asset Project Success: Complete 90% of capital asset projects at original scope and within 110% of CD-2 TPC. 90%* 88% Construction 87% Cleanup 89% 77% Pre-CAP 92% Post- CAP This is based on a 3- year rolling average (FY10 to FY12). TPC is Total Project Cost.

    17. Contract/Project Management

      Office of Environmental Management (EM)

      Third Quarter Overall Contract and Project Management Improvement Performance Metrics and Targets 1 Contract/Project Management Performance Metric FY 2012 Target FY 2012 Forecast FY 2012 Pre- & Post-CAP Forecast Comment Capital Asset Project Success: Complete 90% of capital asset projects at original scope and within 110% of CD-2 TPC. 90%* 87% Construction 87% Cleanup 87% 77% Pre-CAP 90% Post- CAP This is based on a 3- year rolling average (FY10 to FY12). TPC is Total Project Cost.

    18. Contract/Project Management

      Office of Environmental Management (EM)

      Fourth Quarter Overall Contract and Project Management Improvement Performance Metrics and Targets 1 Contract/Project Management Performance Metric FY 2012 Target FY 2012 Final FY 2012 Pre- & Post-CAP Final Comment Capital Asset Project Success: Complete 90% of capital asset projects at original scope and within 110% of CD-2 TPC. 90%* 86% Construction 87% Cleanup 84% 77% Pre-CAP 89% Post-CAP This is based on a 3- year rolling average (FY10 to FY12). TPC is Total Project Cost.

    19. SU-E-T-426: Dose Delivery Accuracy in Breast Field Junction for Free Breath and Deep Inspiration Breath Hold Techniques

      SciTech Connect (OSTI)

      Epstein, D; Shekel, E; Levin, D

      2014-06-01

      Purpose: The purpose of this work was to verify the accuracy of the dose distribution along the field junction in a half beam irradiation technique for breast cancer patients receiving radiation to the breast or chest wall (CW) and the supraclavicular LN region for both free breathing and deep inspiration breath hold (DIBH) technique. Methods: We performed in vivo measurements for nine breast cancer patients receiving radiation to the breast/CW and to the supraclavicular LN region. Six patients were treated to the left breast/CW using DIBH technique and three patients were treated to the right breast/CW in free breath. We used five microMOSFET dosimeters: three located along the field junction, one located 1 cm above the junction and the fifth microMOSFET located 1 cm below the junction. We performed consecutive measurements over several days for each patient and compared the measurements to the TPS calculation (Eclipse, Varian). Results: The calculated and measured doses along the junction were 0.970.08 Gy and 1.020.14 Gy, respectively. Above the junction calculated and measured doses were 0.910.08 Gy and 0.980.09 Gy respectively, and below the junction calculated and measured doses were 1.700.15 Gy and 1.610.09 Gy, respectively. All differences were not statistically significant. When comparing calculated and measured doses for DIBH patients only, there was still no statistically significant difference between values for all dosimeter locations. Analysis was done using the Mann-Whitney Rank-Sum Test. Conclusion: We found excellent correlation between calculated doses from the TPS and measured skin doses at the junction of several half beam fields. Even for the DIBH technique, where there is more potential for variance due to depth of breath, there is no over or underdose along the field junction. This correlation validates the TPS, as well an accurate, reproducible patient setup.

    20. InGaP/GaAs Inverted Dual Junction Solar Cells For CPV Applications Using Metal-Backed Epitaxial Lift-Off

      SciTech Connect (OSTI)

      Bauhuis, Gerard J.; Mulder, Peter; Haverkamp, Erik J.; Schermer, John J.; Nash, Lee J.; Fulgoni, Dominic J. F.; Ballard, Ian M.; Duggan, Geoffrey

      2010-10-14

      The epitaxial lift-off (ELO) technique has been combined with inverted III-V PV cell epitaxial growth with the aim of employing thin film PV cells in HCPV systems. In a stepwise approach to the realization of an inverted triple junction on a MELO platform we have first grown a GaAs single junction PV cell to establish the basic layer release process and cell processing steps followed by the growth, fabrication and test of an inverted InGaP/GaAs dual junction structure.

    1. EM Capital Asset Project List

      Broader source: Energy.gov [DOE]

      Read the EM Capital Asset Project List, which includes the project's name, site, current critical decision and current total project cost.

    2. Principal Associate Director - Capital Projects

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      Principal Associate Director - Capital Projects As Principal Associate Director for Capital Projects (interim), Larry Simmons is responsible for institutional large-project...

    3. MHK Projects/UEK Yukon River Project | Open Energy Information

      Open Energy Info (EERE)

      StateProvince Alaska Project Country United States Project Resource Click here Current Tidal Coordinates 64.7881, -141.2 Project Phase Phase 1 Project Details UEK is has...

    4. River Protection Project (RPP) Project Management Plan

      SciTech Connect (OSTI)

      SEEMAN, S.E.

      2000-04-01

      The U.S. Department of Energy (DOE), in accordance with the Strom Thurmond National Defense Authorization Act for Fiscal Year 1999, established the Office of River Protection (ORP) to successfully execute and manage the River Protection Project (RPP), formerly known as the Tank Waste Remediation System (TWRS). The mission of the RPP is to store, retrieve, treat, and dispose of the highly radioactive Hanford tank waste in an environmentally sound, safe, and cost-effective manner. The team shown in Figure 1-1 is accomplishing the project. The ORP is providing the management and integration of the project; the Tank Farm Contractor (TFC) is responsible for providing tank waste storage, retrieval, and disposal; and the Privatization Contractor (PC) is responsible for providing tank waste treatment.

    5. Silver State Geothermal Project | Open Energy Information

      Open Energy Info (EERE)

      State Geothermal Project Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Development Project: Silver State Geothermal Project Project Location Information Coordinates...

    6. Orita 3 Geothermal Project | Open Energy Information

      Open Energy Info (EERE)

      3 Geothermal Project Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Development Project: Orita 3 Geothermal Project Project Location Information Coordinates...

    7. Panther Canyon Geothermal Project | Open Energy Information

      Open Energy Info (EERE)

      Canyon Geothermal Project Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Development Project: Panther Canyon Geothermal Project Project Location Information...

    8. Kelsey North Geothermal Project | Open Energy Information

      Open Energy Info (EERE)

      North Geothermal Project Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Development Project: Kelsey North Geothermal Project Project Location Information...

    9. Devil's Canyon Geothermal Project | Open Energy Information

      Open Energy Info (EERE)

      Canyon Geothermal Project Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Development Project: Devil's Canyon Geothermal Project Project Location Information...

    10. Dead Horse Geothermal Project | Open Energy Information

      Open Energy Info (EERE)

      Horse Geothermal Project Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Development Project: Dead Horse Geothermal Project Project Location Information...

    11. Delcer Butte Geothermal Project | Open Energy Information

      Open Energy Info (EERE)

      Butte Geothermal Project Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Development Project: Delcer Butte Geothermal Project Project Location Information...

    12. Drum Mountain Geothermal Project | Open Energy Information

      Open Energy Info (EERE)

      Mountain Geothermal Project Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Development Project: Drum Mountain Geothermal Project Project Location Information...

    13. Puna Geothermal Project | Open Energy Information

      Open Energy Info (EERE)

      Puna Geothermal Project Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Development Project: Puna Geothermal Project Project Location Information Coordinates...

    14. Reese River Geothermal Project | Open Energy Information

      Open Energy Info (EERE)

      River Geothermal Project Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Development Project: Reese River Geothermal Project Project Location Information...

    15. Baltazor Springs Geothermal Project | Open Energy Information

      Open Energy Info (EERE)

      Baltazor Springs Geothermal Project Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Development Project: Baltazor Springs Geothermal Project Project Location...

    16. Project Reports for Hualapai Tribe- 2005 Project

      Broader source: Energy.gov [DOE]

      The Hualapai Tribe is located on the end of their existing utility grid which has subjected them to high costs and poor reliability of electric service. The first phase of the project will establish a tribally operated utility to provide service to tribal customers at Grand Canyon West, which has been operating without grid power for the past seven years. The second phase of the project will examine the feasibility and strategy for establishing a tribal utility to serve the remainder of the Hualapai Reservation.

    17. Battleground Energy Recovery Project

      SciTech Connect (OSTI)

      Daniel Bullock

      2011-12-31

      In October 2009, the project partners began a 36-month effort to develop an innovative, commercial-scale demonstration project incorporating state-of-the-art waste heat recovery technology at Clean Harbors, Inc., a large hazardous waste incinerator site located in Deer Park, Texas. With financial support provided by the U.S. Department of Energy, the Battleground Energy Recovery Project was launched to advance waste heat recovery solutions into the hazardous waste incineration market, an area that has seen little adoption of heat recovery in the United States. The goal of the project was to accelerate the use of energy-efficient, waste heat recovery technology as an alternative means to produce steam for industrial processes. The project had three main engineering and business objectives: Prove Feasibility of Waste Heat Recovery Technology at a Hazardous Waste Incinerator Complex; Provide Low-cost Steam to a Major Polypropylene Plant Using Waste Heat; and ? Create a Showcase Waste Heat Recovery Demonstration Project.

    18. Structuring small projects

      SciTech Connect (OSTI)

      Pistole, C.O.

      1995-11-01

      One of the most difficult hurdles facing small project developers is obtaining financing. Many major banks and institutional investors are unwilling to become involved in projects valued at less than $25 million. To gain the interest of small project investors, developers will want to present a well-considered plan and an attractive rate of return. Waste-to-energy projects are one type that can offer diversified revenue sources that assure maximum profitability. The Ripe Touch Greenhouse project, a $14.5 million waste tire-to-energy facility in Colorado, provides a case study of how combining the strengths of the project partners can help gain community and regulatory acceptance and maximize profit opportunities.

    19. Gasification Systems Project Information

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      Project Information Gasifier Optimization Archived Projects Agreement Number Project Title Performer Name Technology Area FE0023497 Alstom's Limestone Chemical Looping Gasification Process for High Hydrogen Syngas Generation Alstom Power, Inc Gasification Systems FE0023577 Advanced Gasifier and Water Gas Shift Technologies for Low Cost Coal Conversion to High Hydrogen Syngas Gas Technology Institute Coal & Coal-Biomass to Liquids, Gasification Systems FE0023915 Pilot Scale Operation and

    20. Funding for CSES Projects

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      Funding for CSES Projects Funding for CSES Projects High quality, cutting-edge science in the areas of astrophysics, space physics, solid planetary geoscience, and climate science. Contact Director Reiner Friedel (505) 665-1936 Email Professional Staff Assistant Georgia D. Sanchez (505) 665-0855 Email CSES Student and Postdoctoral Fellow Program Funding intervals are based on the federal fiscal year spanning the year from October 1 through September 30 of the following year. For all projects

    1. Infrastructure Projects | Jefferson Lab

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      Infrastructure Projects June 3, 2010 What do you think of the TEDF? How about the UIM project? What would have happened if we had not got the ARRA funding for the NP GPP projects last year? Gobbledegook!? Acronymia? Certainly different from the usual PREx, or QWeak, or DVCS that we hear from the physics side of the house! TEDF, UIM and the others are acronyms used by the facilities people, those trying to build, modernize and maintain our infrastructure. TEDF (Technology and Engineering

    2. Microwave solidification project overview

      SciTech Connect (OSTI)

      Sprenger, G.

      1993-01-01

      The Rocky Flats Plant Microwave Solidification Project has application potential to the Mixed Waste Treatment Project and the The Mixed Waste Integrated Program. The technical areas being addressed include (1) waste destruction and stabilization; (2) final waste form; and (3) front-end waste handling and feed preparation. This document covers need for such a program; technology description; significance; regulatory requirements; and accomplishments to date. A list of significant reports published under this project is included.

    3. Tribal Energy Projects

      Energy Savers [EERE]

      PROJECTS U.S. DEPARTMENT OF ENERGY U.S. DEPARTMENT OF ENERGY OFFICE OF ENERGY EFFICIENCY AND RENEWABLE ENERGY OFFICE OF ENERGY EFFICIENCY AND RENEWABLE ENERGY TRIBAL ENERGY PROGRAM TRIBAL ENERGY PROGRAM DOE's Tribal Energy Program DOE's Tribal Energy Program Tribal Energy Projects Tribal Energy Projects First Steps Toward Developing Renewable Energy and Energy Efficiency * Strategic planning * Energy options analysis * Capacity building * Organizational development Renewable Energy Development

    4. Project Submission Template

      Energy Savers [EERE]

      Cooperation Project Title: Country/Organizations: Foreign: Foreign POC: U.S: U.S. POC: Technology Area: Scope of Collaborative Research and Development: Justification of Approach: Work Completed to Date: Overview of Proposed Scope for FY12: Summary Brief Description of Specific Project(s): Timeline: Estimated Cost: Status: CONTINUATION or NEW? Type of Contracting Instrument: (Int'l agreements, lab-lab agreement, etc) Participant Organizations General Scope Budget Foreign (Technical Scope) US

    5. Evaluation Project 4492

      National Nuclear Security Administration (NNSA)

      12-2010 NNSA-B-10-0412 Sandia National Laboratories/New Mexico (SNL/NM) proposes to support the Bio-Response Operational Testing and Evaluation (BOTE) project. The BOTE project would involve multiple releases of a biological simulant, characterization sampling, decontamination, and clearance sampling, at the Idaho National Laboratory (INL) Test Site. Sandia Site Office Bio-Response Operational Testing and Evaluation (BOTE) Project (TA-I, TA-III, & Offsite at INL) INL LACY,SUSAN DOYLENE

    6. The CHPRC Columbia River Protection Project Quality Assurance Project Plan

      SciTech Connect (OSTI)

      Fix, N. J.

      2008-11-30

      Pacific Northwest National Laboratory researchers are working on the CHPRC Columbia River Protection Project (hereafter referred to as the Columbia River Project). This is a follow-on project, funded by CH2M Hill Plateau Remediation Company, LLC (CHPRC), to the Fluor Hanford, Inc. Columbia River Protection Project. The work scope consists of a number of CHPRC funded, related projects that are managed under a master project (project number 55109). All contract releases associated with the Fluor Hanford Columbia River Project (Fluor Hanford, Inc. Contract 27647) and the CHPRC Columbia River Project (Contract 36402) will be collected under this master project. Each project within the master project is authorized by a CHPRC contract release that contains the project-specific statement of work. This Quality Assurance Project Plan provides the quality assurance requirements and processes that will be followed by the Columbia River Project staff.

    7. Tip-contact related low-bias negative differential resistance and rectifying effects in benzeneporphyrinbenzene molecular junctions

      SciTech Connect (OSTI)

      Cheng, Jue-Fei; Zhou, Liping E-mail: leigao@suda.edu.cn; Liu, Man; Yan, Qiang; Han, Qin; Gao, Lei E-mail: leigao@suda.edu.cn

      2014-11-07

      The electronic transport properties of benzeneporphyrinbenzene (BPB) molecules coupled to gold (Au) electrodes were investigated. By successively removing the front-end Au atoms, several BPB junctions with different molecule-electrode contact symmetries were constructed. The calculated currentvoltage (IV) curves depended strongly on the contact configurations between the BPB molecules and the Au electrodes. In particular, a significant low-voltage negative differential resistance effect appeared at ?0.3 V in the junctions with pyramidal electrodes on both sides. Along with the breaking of this tip-contact symmetry, the low-bias negative differential resistance effect gradually disappeared. This tip-contact may be ideal for use in the design of future molecular devices because of its similarity with experimental processes.

    8. High efficiency single Ag nanowire/p-GaN substrate Schottky junction-based ultraviolet light emitting diodes

      SciTech Connect (OSTI)

      Wu, Y.; Li, X.; Xu, P.; Wang, Y.; Shen, X.; Liu, X.; Yang, Q.; Hasan, T.

      2015-02-02

      We report a high efficiency single Ag nanowire (NW)/p-GaN substrate Schottky junction-based ultraviolet light emitting diode (UV-LED). The device demonstrates deep UV free exciton electroluminescence at 362.5?nm. The dominant emission, detectable at ultralow (<1??A) forward current, does not exhibit any shifts when the forward current is increased. External quantum efficiency (EQE) as high as 0.9% is achieved at 25??A current at room temperature. Experiments and simulation analysis show that devices fabricated with thinner Ag NWs have higher EQE. However, for very thin Ag NWs (diameter?junction-based UV-LEDs.

    9. Penobscot Tribe- 2012 Project

      Broader source: Energy.gov [DOE]

      With this award, the Penobscot Indian Nation will advance the preconstruction activities required to secure funding for the proposed 227-megawatt (MW) Alder Stream wind project.

    10. NREL: Biomass Research - Projects

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      Spectrometer analyzes vapors during the gasification and pyrolysis processes. NREL's biomass projects are designed to advance the production of liquid transportation fuels from...

    11. Pit 9 Project

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      July 11, 2007 Pit 9 Project Structures Removed For many years, the Pit 9 project at the Department of Energy's Idaho Site was the symbol of frustration for its cleanup program. All of that is coming to a close now, however, as North Wind, Inc. and its subcontractors are successfully tearing down and removing the structures and equipment left over by the original subcontractor for the Pit 9 project. The goal of this dismantlement and disposal project is to remove buildings and equipment to allow

    12. Production Project Accounts

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      accounting logs. PIs and PI Proxies can request a Project Account by logging into nim and selecting "Request a Collaboration Account" under the blue "Actions" tab. Accessing...

    13. The MAJORANA project

      SciTech Connect (OSTI)

      Elliott, Steven R [Los Alamos National Laboratory

      2009-01-01

      The Majorana Project, a neutrinoless double-beta decay experiment is described with an emphasis on the choice of Ge-detector configuration.

    14. Mascoma: Frontier Biorefinery Project

      Broader source: Energy.gov [DOE]

      This project involves the construction and operation of a biorefinery that produces ethanol and other co-products from cellulosic materials through advanced consolidated bioprocessing.

    15. Fit for Purpose Projects

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      that needs to be addressed by current and future Fit-for-Purpose projects includes: Reservoir pressure management - In deep saline formations, pressure increases due to...

    16. Funding for IGPPS Projects

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      which may, in certain circumstances, require several months to implement after the start of the fiscal year. For all projects supported with Los Alamos National Laboratory...

    17. Classroom Projects - Hanford Site

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      Hanford For Students and Kids Classroom Projects Hanford For Students and Kids Hanford Fun Facts Classroom Projects Famous People of Hanford Classroom Projects Email Email Page | Print Print Page |Text Increase Font Size Decrease Font Size If you've been assigned to write a report or complete a classroom assignment that involves Hanford, we've got some tools that might help you with your project! Photographs The first is an online photo gallery of pictures. We've got thousands of photographs

    18. Custom Renewable Energy Projects

      Broader source: Energy.gov [DOE]

      Project development assistance funding is available for a variety of purposes, including grant writing, feasibility studies, or technical assistance with design, permitting, or utility interconne...

    19. NREL: Transportation Research - Projects

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      Projects 3-D illustration of tractor trailor cab, garbage truck, and car. NREL research helps optimize the energy efficiency of a wide range of vehicle technologies and...

    20. Major Capital Projects

      Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

      BPA on 242015 and does not contain Agency-approved Financial Information. 1 Includes capital projects authorized at the agency level since August 2007 2 Direct capital costs...