National Library of Energy BETA

Sample records for differences reaching double

  1. Double-Difference Tomography for Sequestration MVA

    SciTech Connect (OSTI)

    Westman, Erik

    2008-12-31

    Analysis of synthetic data was performed to determine the most cost-effective tomographic monitoring system for a geologic carbon sequestration injection site. Double-difference tomographic inversion was performed on 125 synthetic data sets: five stages of CO2 plume growth, five seismic event regions, and five geophone arrays. Each resulting velocity model was compared quantitatively to its respective synthetic velocity model to determine an accuracy value. The results were examined to determine a relationship between cost and accuracy in monitoring, verification, and accounting applications using double-difference tomography. The geophone arrays with widely-varying geophone locations, both laterally and vertically, performed best. Additionally, double difference seismic tomography was performed using travel time data from a carbon sequestration site at the Aneth oil field in southeast Utah as part of a Department of Energy initiative on monitoring, verification, and accounting (MVA) of sequestered CO2. A total of 1,211 seismic events were recorded from a borehole array consisting of 22 geophones. Artificial velocity models were created to determine the ease with which different CO2 plume locations and sizes can be detected. Most likely because of the poor geophone arrangement, a low velocity zone in the Desert Creek reservoir can only be detected when regions of test site containing the highest ray path coverage are considered. MVA accuracy and precision may be improved through the use of a receiver array that provides more comprehensive ray path coverage.

  2. Contributions of different neutron pairs in different approaches for neutrinoless double beta decay

    E-Print Network [OSTI]

    Alberto Escuderos; Amand Faessler; Vadim Rodin; Fedor Simkovic

    2010-06-07

    The methods used till now to calculate the neutrinoless double beta decay matrix elements are: the Quasiparticle Random Phase Approximation (QRPA), the Shell Model (SM), the angular momentum projected Hartee-Fock-Bogoliubov approach (HFB) and the Interacting Boson Model (IBM). The different approaches are compared specifically concerning the the angular momenta and parities of the neutron pairs, which are changed into two protons by the $0\

  3. Imaging the Soultz Enhanced Geothermal Reservoir using double-difference tomography and microseismic data

    E-Print Network [OSTI]

    Piñeros Concha, Diego Alvaro

    2010-01-01

    We applied the double-difference tomography method to image the P and S-wave velocity structure of the European Hot Dry Rock geothermal reservoir (also known as the Soultz Enhanced Geothermal System) at Soultz-sous-Forets, ...

  4. Pinning Down the Mechanism of Neutrinoless Double {beta} Decay with Measurements in Different Nuclei

    SciTech Connect (OSTI)

    Deppisch, Frank [Deutsches Elektronen-Synchrotron (DESY), D-22603 Hamburg (Germany); Paes, Heinrich [Department of Physics and Astronomy, University of Alabama, Tuscaloosa, Alabama 35487 (United States)

    2007-06-08

    A measurement of neutrinoless double beta decay in one isotope does not allow us to determine the underlying physics mechanism. We discuss the discrimination of mechanisms for neutrinoless double beta decay by comparing ratios of half-life measurements for different isotopes. Six prominent examples for specific new physics contributions to neutrinoless double beta decay are analyzed. We find that the change in corresponding ratios of half lives varies from 60% for supersymmetric models up to a factor of 5-20 for extra-dimensional and left-right-symmetric mechanisms.

  5. Pinning down the mechanism of neutrinoless double beta decay with measurements in different nuclei

    E-Print Network [OSTI]

    F. Deppisch; H. Päs

    2007-06-25

    A measurement of neutrinoless double beta decay in one isotope does not allow to determine the underlying physics mechanism. We discuss the discrimination of mechanisms for neutrinoless double beta decay by comparing ratios of half life measurements for different isotopes. Six prominent examples for specific new physics contributions to neutrinoless double beta decay are analyzed. We find that the change in corresponding ratios of half lives varies from 60% for supersymmetric models up to a factor of 5-20 for extra-dimensional and left-right-symmetric mechanisms.

  6. Double-Difference Tomography for Sequestration MVA [monitoring, verification, and accounting

    SciTech Connect (OSTI)

    Westman, Erik

    2012-12-31

    Analysis of synthetic data was performed to determine the most cost-effective tomographic monitoring system for a geologic carbon sequestration injection site. Double-difference tomographic inversion was performed on 125 synthetic data sets: five stages of CO2 plume growth, five seismic event regions, and five geophone arrays. Each resulting velocity model was compared quantitatively to its respective synthetic velocity model to determine an accuracy value. The results were examined to determine a relationship between cost and accuracy in monitoring, verification, and accounting applications using double-difference tomography. The geophone arrays with widely-varying geophone locations, both laterally and vertically, performed best. Additionally, double difference seismic tomography was performed using travel time data from a carbon sequestration site at the Aneth oil field in southeast Utah as part of a Department of Energy initiative on monitoring, verification, and accounting (MVA) of sequestered CO2. A total of 1,211 seismic events were recorded from a borehole array consisting of 22 geophones. Artificial velocity models were created to determine the ease with which different CO2 plume locations and sizes can be detected. Most likely because of the poor geophone arrangement, a low velocity zone in the Desert Creek reservoir can only be detected when regions of test site containing the highest ray path coverage are considered. MVA accuracy and precision may be improved through the use of a receiver array that provides more comprehensive ray path coverage.

  7. Probing particle and nuclear physics models of neutrinoless double beta decay with different nuclei

    E-Print Network [OSTI]

    G. L. Fogli; E. Lisi; A. M. Rotunno

    2009-08-06

    Half-life estimates for neutrinoless double beta decay depend on particle physics models for lepton flavor violation, as well as on nuclear physics models for the structure and transitions of candidate nuclei. Different models considered in the literature can be contrasted - via prospective data - with a "standard" scenario characterized by light Majorana neutrino exchange and by the quasiparticle random phase approximation, for which the theoretical covariance matrix has been recently estimated. We show that, assuming future half-life data in four promising nuclei (Ge-76, Se-82, Te-130, and Xe-136), the standard scenario can be distinguished from a few nonstandard physics models, while being compatible with alternative state-of-the-art nuclear calculations (at 95% C.L.). Future signals in different nuclei may thus help to discriminate at least some decay mechanisms, without being spoiled by current nuclear uncertainties. Prospects for possible improvements are also discussed.

  8. Probing particle and nuclear physics models of neutrinoless double beta decay with different nuclei

    SciTech Connect (OSTI)

    Fogli, G. L.; Rotunno, A. M. [Dipartimento Interateneo di Fisica 'Michelangelo Merlin', Via Amendola 173, 70126 Bari (Italy); Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Via Orabona 4, 70126 Bari (Italy); Lisi, E. [Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Via Orabona 4, 70126 Bari (Italy)

    2009-07-01

    Half-life estimates for neutrinoless double beta decay depend on particle physics models for lepton-flavor violation, as well as on nuclear physics models for the structure and transitions of candidate nuclei. Different models considered in the literature can be contrasted - via prospective data - with a 'standard' scenario characterized by light Majorana neutrino exchange and by the quasiparticle random phase approximation, for which the theoretical covariance matrix has been recently estimated. We show that, assuming future half-life data in four promising nuclei ({sup 76}Ge, {sup 82}Se, {sup 130}Te, and {sup 136}Xe), the standard scenario can be distinguished from a few nonstandard physics models, while being compatible with alternative state-of-the-art nuclear calculations (at 95% C.L.). Future signals in different nuclei may thus help to discriminate at least some decay mechanisms, without being spoiled by current nuclear uncertainties. Prospects for possible improvements are also discussed.

  9. Carbon sequestration monitoring with acoustic double-difference waveform inversion: A case study on SACROC walkaway VSP data

    E-Print Network [OSTI]

    Malcolm, Alison

    Carbon sequestration monitoring with acoustic double-difference waveform inversion: A case study National Laboratory SUMMARY Geological carbon sequestration involves large-scale injection of carbon is crucial for ensuring safe and reliable carbon storage (Bickle et al., 2007). Conventional analysis of time

  10. Carbon sequestration monitoring with acoustic double-difference waveform inversion: A case study on SACROC walkaway VSP data

    SciTech Connect (OSTI)

    Huang, Lianjie [Los Alamos National Laboratory; Fehler, Michael [MIT; Malcolm, Alison [MIT; Yang, Di [MIT

    2011-01-01

    Geological carbon sequestration involves large-scale injection of carbon dioxide into underground geologic formations and is considered as a potential approach for mitigating global warming. Changes in reservoir properties resulting from the CO{sub 2} injection and migration can be characterized using waveform inversions of time-lapse seismic data. The conventional approach for analysis using waveform tomography is to take the difference of the images obtained using baseline and subsequent time-lapse datasets that are inverted independently. By contrast, double-difference waveform inversion uses timelapse seismic datasets to jointly invert for reservoir changes. We apply this method to a field time-lapse walkaway VSP data set acquired in 2008 and 2009 for monitoring CO{sub 2} injection at an enhanced oil recovery field at SACROC, Texas. The double-difference waveform inversion gives a cleaner and more easily interpreted image of reservoir changes, as compared to that obtained with the conventional scheme. Our results from the applicatoin of acoustic double-difference waveform tomography shows some zones with decreased P-wave velocity within the reservoir due to CO{sub 2} injection and migration.

  11. Neutrinoless double beta decay: searching for new physics with comparison of different nuclei

    E-Print Network [OSTI]

    A. Ali; A. V. Borisov; D. V. Zhuridov

    2011-12-17

    The neutrinoless double beta decay is analyzed using a general Lorentz invariant effective Lagrangian for various decaying nuclei of current experimental interest: $^{76}$Ge, $^{82}$Se, $^{100}$Mo, $^{130}$Te, and $^{136}$Xe. We work out the half-lives and angular correlation coefficients of the outgoing electrons in several scenarios for new physics: the left-right symmetric models, the R-parity-violating SUSY and models with leptoquarks. The theoretical uncertainty in the nuclear matrix elements is discussed.

  12. Combining and comparing neutrinoless double beta decay experiments using different nuclei

    E-Print Network [OSTI]

    Johannes Bergstrom

    2013-04-04

    We perform a global fit of the most relevant neutrinoless double beta decay experiments within the standard model with massive Majorana neutrinos. Using Bayesian inference makes it possible to take into account the theoretical uncertainties on the nuclear matrix elements in a fully consistent way. First, we analyze the data used to claim the observation of neutrinoless double beta decay in Ge-76, and find strong evidence (according to Jeffrey's scale) for a peak in the spectrum and moderate evidence for that the peak is actually close to the energy expected for the neutrinoless decay. We also find a significantly larger statistical error than the original analysis, which we include in the comparison with other data. Then, we statistically test the consistency between this claim with that of recent measurements using Xe-136. We find that the two data sets are about 40 to 80 times more probable under the assumption that they are inconsistent, depending on the nuclear matrix element uncertainties and the prior on the smallest neutrino mass. Hence, there is moderate to strong evidence of incompatibility, and for equal prior probabilities the posterior probability of compatibility is between 1.3% and 2.5%. If one, despite such evidence for incompatibility, combines the two data sets, we find that the total evidence of neutrinoless double beta decay is negligible. If one ignores the claim, there is weak evidence against the existence of the decay. We also perform approximate frequentist tests of compatibility for fixed ratios of the nuclear matrix elements, as well as of the no signal hypothesis. Generalization to other sets of experiments as well as other mechanisms mediating the decay is possible.

  13. Double Neutron Stars: Evidence For Two Different Neutron-Star Formation Mechanisms

    E-Print Network [OSTI]

    E. P. J. van den Heuvel

    2007-04-26

    Six of the eight double neutron stars known in the Galactic disk have low orbital eccentricities (neutron stars received only very small velocity kicks at birth. This is similar to the case of the B-emission X-ray binaries, where a sizable fraction of the neutron stars received hardly any velocity kick at birth (Pfahl et al. 2002). The masses of the second-born neutron stars in five of the six low-eccentricity double neutron stars are remarkably low (between 1.18 and 1.30 Msun). It is argued that these low-mass, low-kick neutron stars were formed by the electron-capture collapse of the degenerate O-Ne-Mg cores of helium stars less massive than about 3.5 Msun, whereas the higher-mass, higher kick-velocity neutron stars were formed by the collapses of the iron cores of higher initial mass. The absence of low-velocity single young radio pulsars (Hobbs et al. 2005) is consistent with the model proposed by Podsiadlowski et al. (2004), in which the electron-capture collapse of degenerate O-Ne-Mg cores can only occur in binary systems, and not in single stars.

  14. Double Muscling in Cattle. 

    E-Print Network [OSTI]

    Kieffer, Nat M.; Cartwright, T.C.

    1980-01-01

    ,;J Cover photo: This lO-month-old bull is the product of a two-breed cross. He shows classic symptoms of double muscling and illustrates that the double-muscled gene is the same in different breeds of cattlr Double Muscling ......... In Cattle... Nat M. Kieffer Professor T. C. Cartwright Professor The Texas Agricultural Experiment Station (Department of Animal Science) 2 Contents 2 Summary 3 Introduction 3 Historical Background 4 Physical Characteristics of Double-Muscled Cattle 4...

  15. Neutrinoless double beta decay

    E-Print Network [OSTI]

    Petr Vogel

    2006-11-17

    The status of the search for neutrinoless double beta decay is reviewed. The effort to reach the sensitivity needed to cover the effective Majorana neutrino mass corresponding to the degenerate and inverted mass hierarchy is described. Various issues concerning the theory (and phenomenology) of the relation between the $0\

  16. Tailoring surface properties and structure of layered double hydroxides using silanes with different number of functional groups

    SciTech Connect (OSTI)

    Tao, Qi; He, Hongping; Li, Tian; Frost, Ray L.; Zhang, Dan; He, Zisen

    2014-05-01

    Four silanes, trimethylchlorosilane (TMCS), dimethyldiethoxylsilane (DMDES), 3-aminopropyltriethoxysilane (APTES) and tetraethoxysilane (TEOS), were adopted to graft layered double hydroxides (LDH) via an induced hydrolysis silylation method (IHS). Fourier transform infrared spectra (FTIR) and {sup 29}Si MAS nuclear magnetic resonance spectra ({sup 29}Si MAS NMR) indicated that APTES and TEOS can be grafted onto LDH surfaces via condensation with hydroxyl groups of LDH, while TMCS and DMDES could only be adsorbed on the LDH surface with a small quantity. A combination of X-ray diffraction patterns (XRD) and {sup 29}Si MAS NMR spectra showed that silanes were exclusively present in the external surface and had little influence on the long range order of LDH. The surfactant intercalation experiment indicated that the adsorbed and/or grafted silane could not fix the interlamellar spacing of the LDH. However, they will form crosslink between the particles and affect the further surfactant intercalation in the silylated samples. The replacement of water by ethanol in the tactoids and/or aggregations and the polysiloxane oligomers formed during silylation procedure can dramatically increase the value of BET surface area (S{sub BET}) and total pore volumes (V{sub p}) of the products. - Graphical abstract: The replacement of water by ethanol in the tactoids and aggregations of LDHs, and the polysiloxane oligomers formed during silylation process can dramatically increase the BET surface area (S{sub BET}) and the total pore volume (V{sub p}) of the silylated products. - Highlights: • Silanes with multifunctional groups were grafted onto LDH surface in C{sub 2}H{sub 5}OH medium. • The number of hydrolysable groups in silanes affects the structure of grafted LDH. • Replacement of H{sub 2}O by C{sub 2}H{sub 5}OH in aggregations increases S{sub BET} and V{sub p} of grafted LDH. • Polysiloxane oligomers contribute to the increase of S{sub BET} and V{sub p} of grafted LDH.

  17. Pine pulpwood prices reached re-

    E-Print Network [OSTI]

    Pine pulpwood prices reached re- cord highs due to strong pulp and paper demand and lumber production curtailment. In contrast, sawlog prices continued their downward movement in November/December statewide av- erage pine sawlog prices decreased to $36.72/ton, a 4.3% drop for the period and a 14.1% drop

  18. The search for neutrinoless double beta decay

    E-Print Network [OSTI]

    J. J. Gomez-Cadenas; J. Martin-Albo; M. Mezzetto; F. Monrabal; M. Sorel

    2012-01-16

    In the last two decades the search for neutrinoless double beta decay has evolved into one of the highest priorities for understanding neutrinos and the origin of mass. The main reason for this paradigm shift has been the discovery of neutrino oscillations, which clearly established the existence of massive neutrinos. An additional motivation for conducting such searches comes from the existence of an unconfirmed, but not refuted, claim of evidence for neutrinoless double decay in $^{76}\\text{Ge}$. As a consequence, a new generation of experiments, employing different detection techniques and $\\beta\\beta$ isotopes, is being actively promoted by experimental groups across the world. In addition, nuclear theorists are making remarkable progress in the calculation of the neutrinoless double beta decay nuclear matrix elements, thus eliminating a substantial part of the theoretical uncertainties affecting the particle physics interpretation of this process. In this report, we review the main aspects of the double beta decay process and some of the most relevant experiments. The picture that emerges is one where searching for neutrinoless double beta decay is recognized to have both far-reaching theoretical implications and promising prospects for experimental observation in the near future.

  19. Physics Reach at Future Colliders

    SciTech Connect (OSTI)

    Krawczyk, Maria [Institute of Theoretical Physics, University of Warsaw, ul. Hoz-dota 69, 00-681 Warsaw (Poland); CERN, CH-1211 Geneva 23 (Switzerland)

    2007-11-27

    The physics reach at future colliders is discussed, with focus on the Higgs sector. First we present the Standard Model and some results obtained at the existing high-energy hadron collider, Tevatron, together with the corresponding expectations for the Large Hadron Collider (LHC), which starts operating in 2008. Then we discuss important low energy measurements: the anomalous magnetic moment for muon and the leptonic B-decay together with b{yields}s{gamma}. Finally the potential of the planned e{sup +}e{sup -} International Linear Collider (ILC) and its possible option Photon Linear Collider (PLC), e{gamma} and {gamma}{gamma}, is shortly presented.

  20. Double Pair Production by Ultra High Energy Cosmic Ray Photons

    E-Print Network [OSTI]

    S. V. Demidov; O. E. Kalashev

    2008-12-22

    With use of CompHEP package we've made the detailed estimate of the influence of double e+e- pair production by photons (DPP) on the propagation of ultra high energy electromagnetic cascade. We show that in the models in which cosmic ray photons energy reaches few thousand EeV refined DPP analysis may lead to substantial difference in predicted photon spectrum compared to previous rough estimates.

  1. Double bevel construction of a diamond anvil

    DOE Patents [OSTI]

    Moss, W.C.

    1988-10-11

    A double or multiple bevel culet geometry is used on a diamond anvil in a high pressure cell apparatus to provide increased sample pressure and stability for a given force applied to the diamond tables. Double or multiple bevel culet geometries can also be used for sapphire or other hard crystal anvils. Pressures up to and above 5 Megabars can be reached. 8 figs.

  2. Approximating Human Reaching Volumes Using Inverse Kinematics

    E-Print Network [OSTI]

    Rodríguez, Inmaculada

    with virtual environments, and seated reach, which is important in ergonomics studies where the workplace evaluation assesses the reachability of all the workspace. Our approach is directed toward hand reaching

  3. Fact #864: March 16, 2015 Imports of Primary Energy have Declined Sharply Since the Peak Reached in 2007

    Broader source: Energy.gov [DOE]

    Primary energy imports have declined by about 34% since the peak reached in 2007. During this same period, exports of primary energy have more than doubled. The combination of decreasing imports...

  4. We Can Help You Reach Graduation!

    E-Print Network [OSTI]

    Doty, Sharon Lafferty

    #12;We Can Help You Reach Graduation! Seattle · Tacoma · Btrthelli #12;Summer Quarter Quick .................~...................................................... 85 UW Tacoma ..................................:.................................... 88 How to apply

  5. Limitations of extended reach drilling in deepwater 

    E-Print Network [OSTI]

    Akinfenwa, Akinwunmi Adebayo

    2000-01-01

    As the worldwide search for hydrocarbons continues into the deepwater of the oceans, drilling extended reach wells have helped to drain the fields in the most cost effective way, thus providing the oil and gas industry the cushion to cope...

  6. Research Data Management: Reaching Out to Faculty

    E-Print Network [OSTI]

    Tsang, Daniel C

    2013-01-01

    Research Data Management Reaching Out to Faculty Daniel C.C. Tsang 2013 ARL SpecKit 334: Research Data Managementpublications.arl.org/Research-Data-Management-Services-SPEC-

  7. On the use of the double floating probe method to infer the difference between the electron and the heavy particles temperatures in an atmospheric pressure, vortex-stabilized nitrogen plasma jet

    SciTech Connect (OSTI)

    Prevosto, L. Mancinelli, B. R.; Kelly, H.; Instituto de Física del Plasma , Departamento de Física, Facultad de Ciencias Exactas y Naturales Ciudad Universitaria Pab. I, 1428 Buenos Aires

    2014-05-15

    Sweeping double probe measurements in an atmospheric pressure direct current vortex-stabilized plasma jet are reported (plasma conditions: 100 A discharge current, N{sub 2} gas flow rate of 25 Nl/min, thoriated tungsten rod-type cathode, copper anode with 5 mm inner diameter). The interpretation of the double probe characteristic was based on a generalization of the standard double floating probe formulae for non-uniform plasmas coupled to a non-equilibrium plasma composition model. Perturbations caused by the current to the probe together with collisional and thermal processes inside the probe perturbed region were taken into account. Radial values of the average electron and heavy particle temperatures as well as the electron density were obtained. The calculation of the temperature values did not require any specific assumption about a temperature relationship between different particle species. An electron temperature of 10?900 ± 900 K, a heavy particle temperature of 9300 ± 900 K, and an electron density of about 3.5 × 10{sup 22} m{sup ?3} were found at the jet centre at 3.5 mm downstream from the torch exit. Large deviations from kinetic equilibrium were found toward the outer border of the plasma jet. These results showed good agreement with those previously reported by the authors by using a single probe technique. The calculations have shown that this method is particularly useful for studying spraying-type plasma torches operated at power levels of about 15 kW.

  8. Pumpdown assistance extends coiled tubing reach

    SciTech Connect (OSTI)

    Tailby, R.J. )

    1992-07-01

    One of the most challenging coiled tubing applications to emerge in the last few years is horizontal well maintenance. When wireline cannot be used, techniques that offer some of the same flexibility, availability and relatively low cost must be used. During this same period, however, drilling technology has also made huge strides in horizontal and extended-reach areas. Wells are now being drilled with horizontal lengths in excess of 6,000 ft and measured depths of more than 22,000 ft. This paper reports that although horizontal wells are definitely here to stay, many operators have had to reevaluate their positions after being confronted with the problem of recompleting these wells to eliminate excessive water or gas production. A full workover with workstring using either a drilling rig or snubbing unit can be expensive and may lead to lost production because of limited rig availability. Coiled tubing has successfully been used in most cases thus far, but it has length and horizontal reach limitations that drilling technology will soon overtake. Within the constraints of current technology and tube capabilities, coiled tubing does not have the buckling resistance or reel capacity to service today's longest horizontal and extended reach wells or those planned and foreseen in the future. Even if coiled tubing can reach TD, operations requiring downward force are severely restricted.

  9. The smallest refrigerators can reach maximal efficiency

    E-Print Network [OSTI]

    Paul Skrzypczyk; Nicolas Brunner; Noah Linden; Sandu Popescu

    2011-12-02

    We investigate whether size imposes a fundamental constraint on the efficiency of small thermal machines. We analyse in detail a model of a small self-contained refrigerator consisting of three qubits. We show analytically that this system can reach the Carnot efficiency, thus demonstrating that there exists no complementarity between size and efficiency.

  10. Reaching Wider South West Wales Partnership Strategy

    E-Print Network [OSTI]

    Martin, Ralph R.

    1 Reaching Wider South West Wales Partnership Strategy 2011-14 #12;2 `Poverty is when someone patterns, customs and activities.' Joseph Rowntree Foundation Monitoring poverty and social exclusion in Communities First areas of high relative poverty. It interlocks with higher education strategic approaches

  11. Sustainability Double Degree Double Degree Info

    E-Print Network [OSTI]

    Grünwald, Niklaus J.

    Sustainability Double Degree Double Degree Info: · 36 credits in B for graduation. Sustainability Core: Take each course below for a total of 17 -20 credits. Term/Grade Course _____ ____ *NR 350 (4) Sustainable

  12. Mobile Experience Sampling: Reaching the Parts of Facebook Other Methods Cannot Reach

    E-Print Network [OSTI]

    Henderson, Tristan

    Mobile Experience Sampling: Reaching the Parts of Facebook Other Methods Cannot Reach Fehmi Ben obtained from a 2-week experiment with 40 students sharing their location in real time on Facebook-world experiments. Measuring privacy concerns, however, during the actual usage of such experimental testbeds, may

  13. Development and Deployment of the Extended Reach Sluicing System (ERSS) for Retrieval of Hanford Single Shell Tank Waste. Draft

    SciTech Connect (OSTI)

    Bauer, Roger E.; Figley, Reed R.; Innes, A. G.

    2013-11-11

    A history of the evolution and the design development of Extended Reach Sluicer System (ERSS) is presented. Several challenges are described that had to be overcome to create a machine that went beyond the capabilities of prior generation sluicers to mobilize waste in Single Shell Tanks for pumping into Double Shell Tank receiver tanks. Off-the-shelf technology and traditional hydraulic fluid power systems were combined with the custom-engineered components to create the additional functionality of the ERSS, while still enabling it to fit within very tight entry envelope into the SST. Problems and challenges inevitably were encountered and overcome in ways that enhance the state of the art of fluid power applications in such constrained environments. Future enhancements to the ERSS design are explored for retrieval of tanks with different dimensions and internal obstacles.

  14. Spallation Neutron Source reaches megawatt power

    ScienceCinema (OSTI)

    Dr. William F. Brinkman

    2010-01-08

    The Department of Energy's Spallation Neutron Source (SNS), already the world's most powerful facility for pulsed neutron scattering science, is now the first pulsed spallation neutron source to break the one-megawatt barrier. "Advances in the materials sciences are fundamental to the development of clean and sustainable energy technologies. In reaching this milestone of operating power, the Spallation Neutron Source is providing scientists with an unmatched resource for unlocking the secrets of materials at the molecular level," said Dr. William F. Brinkman, Director of DOE's Office of Science.

  15. Reach and get capability in a computing environment

    DOE Patents [OSTI]

    Bouchard, Ann M. (Albuquerque, NM); Osbourn, Gordon C. (Albuquerque, NM)

    2012-06-05

    A reach and get technique includes invoking a reach command from a reach location within a computing environment. A user can then navigate to an object within the computing environment and invoke a get command on the object. In response to invoking the get command, the computing environment is automatically navigated back to the reach location and the object copied into the reach location.

  16. Creative problem solving at Rocky Reach

    SciTech Connect (OSTI)

    Bickford, B.M.; Garrison, D.H.

    1997-04-01

    Tainter gate inspection and thrust bearing cooling system problems at the 1287-MW Rocky Reach hydroelectric project on the Columbia River in Washington are described. Gate inspection was initiated in response to a failure of similar gates at Folsom Dam. The approach involved measuring the actual forces on the gates and comparing them to original model study parameters, rather than the traditional method of building a hydraulic model. Measurement and visual inspection was completed in one day and had no effect on migration flows. Two problems with the thrust bearing cooling system are described. First, whenever a generating unit was taken off line, cooling water continued circulating and lowered oil temperatures. The second problem involved silt buildup in flow measuring device tubes on the cooling water system. Modifications to correct cooling system problems and associated costs are outlined.

  17. Reaching 100% Renewable Energy, City of Aspen (Fact Sheet), NREL...

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

    REACHING 100% RENEWABLE ENERGY City of Aspen and the National Renewable Energy Laboratory develop and implement a strategy to cost-effectively reach a ground- breaking goal In...

  18. The Smart Grid Experience: Applying Results, Reaching Beyond...

    Office of Environmental Management (EM)

    Results, Reaching Beyond - Summary of Conference Proceedings (December 2014) The Smart Grid Experience: Applying Results, Reaching Beyond - Summary of Conference Proceedings...

  19. Milestone Reached: New Process Reduces Cost and Risk of Biofuel...

    Energy Savers [EERE]

    Milestone Reached: New Process Reduces Cost and Risk of Biofuel Production from Bio-Oil Upgrading Milestone Reached: New Process Reduces Cost and Risk of Biofuel Production from...

  20. Expanded "Green Button" Will Reach Federal Agencies and More...

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

    "Green Button" Will Reach Federal Agencies and More American Energy Consumers Expanded "Green Button" Will Reach Federal Agencies and More American Energy Consumers December 6,...

  1. Expanded "Green Button" Will Reach Federal Agencies and More...

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

    Expanded "Green Button" Will Reach Federal Agencies and More American Energy Consumers Expanded "Green Button" Will Reach Federal Agencies and More American Energy Consumers...

  2. San Acacia Reach San Acacia Dam to Escondida Bridge

    E-Print Network [OSTI]

    Julien, Pierre Y.

    San Acacia Reach San Acacia Dam to Escondida Bridge Hydraulic Modeling Analysis 1918-2006 Middle, hydraulic modeling analyses have been performed on the San Acacia reach to determine the changes by Reclamation on the San Acacia reach. The 11.6 mile long reach extends from the San Acacia Diversion dam (River

  3. Neutrinoless Double Beta Decay and Physics Beyond the Standard Model

    E-Print Network [OSTI]

    Frank F. Deppisch; Martin Hirsch; Heinrich Päs

    2012-08-03

    Neutrinoless double beta decay is the most powerful tool to probe not only for Majorana neutrino masses but for lepton number violating physics in general. We discuss relations between lepton number violation, double beta decay and neutrino mass, review a general Lorentz invariant parametrization of the double beta decay rate, highlight a number of different new physics models showing how different mechanisms can trigger double beta decay, and finally discuss possibilities to discriminate and test these models and mechanisms in complementary experiments.

  4. Comparison of Robot-Assisted Reaching to Free Reaching in Promoting Recovery

    E-Print Network [OSTI]

    Reinkensmeyer, David J.

    . To date, ten subjects have completed twenty-four therapy sessions over an eight-week period, randomized to either a robot exercise group (N = 6) or non-robotic exercise group (N = 4). For the robot exercise group, the ARM Guide mechanically assisted in reaching to a series of targets. For the non-robotic group

  5. Neutrinoless double beta decay experiments

    E-Print Network [OSTI]

    K. Zuber

    2006-10-04

    The study of neutrinoless double beta decay is of outmost importance for neutrino physics. It is considered to be the gold plated channel to probe the fundamental character of neutrinos and to determine the neutrino mass. From the experimental point about nine different isotopes are explored for the search. After a general introduction follows a short discussion on nuclear matrix element calculations and supportive measurements. The current experimental status of double beta searches is presented followed by a short discussion of the ideas and proposals for large scale experiments.

  6. Chromosome doubling method

    DOE Patents [OSTI]

    Kato, Akio

    2006-11-14

    The invention provides methods for chromosome doubling in plants. The technique overcomes the low yields of doubled progeny associated with the use of prior techniques for doubling chromosomes in plants such as grasses. The technique can be used in large scale applications and has been demonstrated to be highly effective in maize. Following treatment in accordance with the invention, plants remain amenable to self fertilization, thereby allowing the efficient isolation of doubled progeny plants.

  7. Reaching Site Closure for Groundwater under Multiple Regulatory Agencies

    SciTech Connect (OSTI)

    Glucksberg, N.; Shephard, Gene; Peters, Jay; Couture, B.

    2008-01-15

    Groundwater at the Connecticut Yankee Atomic Power Company (CYAPCO) Haddam Neck Plant (HNP) requires investigation of both radionuclides and chemical constituents in order to achieve closure. Cleanup criteria for groundwater are regulated both by federal and state agencies. These requirements vary in both numerical values as well as the duration of post remediation monitoring. The only consistent requirement is the development of a site conceptual model and an understanding of the hydrogeologic conditions that will govern contaminant transport and identify potential receptors. To successfully reach closure under each agency, it is paramount to understand the different requirements during the planning stages of the investigation. Therefore, the conceptual site model, groundwater transport mechanisms, and potential receptors must be defined. Once the hydrogeology is understood, a long term groundwater program can then be coordinated to meet each regulatory agency requirement to both terminate the NRC license and reach site closure under RCRA. Based on the different criteria, the CTDEP-LR (or RSR criteria) are not only bounding, but also requires the longest duration. As with most decommissioning efforts, regulatory attention is focused on the NRC, however, with the recent industry initiatives based on concern of tritium releases to groundwater at other plants, it is likely that the USEPA and state agencies may continue to drive site investigations. By recognizing these differences, data quality objectives can include all agency requirements, thus minimizing rework or duplicative efforts. CYAPCO intends to complete groundwater monitoring for the NRC and CTDEP-RD by July 2007. However, because shallow remediations are still being conducted, site closure under USEPA and CTDEP-LR is projected to be late 2011.

  8. A DOUBLE-PEAKED OUTBURST OF A 0535+26 OBSERVED WITH INTEGRAL, RXTE, AND SUZAKU

    SciTech Connect (OSTI)

    Caballero, I.; Barragan, L.; Wilms, J.; Kreykenbohm, I.; Ferrigno, C.; Klochkov, D.; Suchy, S.; Santangelo, A.; Staubert, R.; Zurita Heras, J. A.; Kretschmar, P.; Fuerst, F.; Rothschild, R.; Finger, M. H.; Camero-Arranz, A.; Makishima, K.; Enoto, T.; Iwakiri, W.; and others

    2013-02-20

    The Be/X-ray binary A 0535+26 showed a normal (type I) outburst in 2009 August. It is the fourth in a series of normal outbursts associated with the periastron, but is unusual because it presented a double-peaked light curve. The two peaks reached a flux of {approx}450 mCrab in the 15-50 keV range. We present results of the timing and spectral analysis of INTEGRAL, RXTE, and Suzaku observations of the outburst. The energy-dependent pulse profiles and their evolution during the outburst are studied. No significant differences with respect to other normal outbursts are observed. The centroid energy of the fundamental cyclotron line shows no significant variation during the outburst. A spectral hardening with increasing luminosity is observed. We conclude that the source is accreting in the sub-critical regime. We discuss possible explanations for the double-peaked outburst.

  9. Are trout populations affected by reach-scale stream slope?

    E-Print Network [OSTI]

    ). Reach-scale stream slope and the energy that it helps to gen- erate exert a dominant influenceAre trout populations affected by reach-scale stream slope? Daniel J. Isaak And Wayne A. Hubert Abstract: Reach-scale stream slope and the structure of associated physical habitats are thought to affect

  10. DRAFT San Acacia Reach San Acacia Dam to Escondida Bridge

    E-Print Network [OSTI]

    Julien, Pierre Y.

    DRAFT San Acacia Reach San Acacia Dam to Escondida Bridge Hydraulic Modeling Analysis 1918, hydraulic modeling analyses have been performed on the San Acacia reach to determine the changes by Reclamation on the San Acacia reach. The 11.6 mile long extends from the San Acacia Diversion dam (River Mile

  11. Reliability Estimation for Double Containment Piping

    SciTech Connect (OSTI)

    L. Cadwallader; T. Pinna

    2012-08-01

    Double walled or double containment piping is considered for use in the ITER international project and other next-generation fusion device designs to provide an extra barrier for tritium gas and other radioactive materials. The extra barrier improves confinement of these materials and enhances safety of the facility. This paper describes some of the design challenges in designing double containment piping systems. There is also a brief review of a few operating experiences of double walled piping used with hazardous chemicals in different industries. This paper recommends approaches for the reliability analyst to use to quantify leakage from a double containment piping system in conceptual and more advanced designs. The paper also cites quantitative data that can be used to support such reliability analyses.

  12. Scale evolution of double parton correlations

    E-Print Network [OSTI]

    Tomas Kasemets

    2014-11-17

    We review the effect of scale evolution on a number of different correlations in double parton scattering (DPS). The strength of the correlations generally decreases with the scale but at a rate which greatly varies between different types. Through studies of the evolution, an understanding of which correlations can be of experimental relevance in different processes and kinematical regions is obtained.

  13. Searches for neutrinoless double beta decay

    E-Print Network [OSTI]

    B. Schwingenheuer

    2012-01-24

    Neutrinoless double beta decay is a lepton number violating process whose observation would also establish that neutrinos are their own anti-particles. There are many experimental efforts with a variety of techniques. Some (EXO, Kamland-Zen, GERDA phase I and CANDLES) started take data in 2011 and EXO has reported the first measurement of the half life for the double beta decay with two neutrinos of $^{136}$Xe. The sensitivities of the different proposals are reviewed.

  14. Milestone Reached: New Process Reduces Cost and Risk of Biofuel...

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

    cellulosic ethanol. Addthis Related Articles Milestone Reached: New Process Reduces Cost and Risk of Biofuel Production from Bio-Oil Upgrading Refining Bio-Oil alongside Petroleum...

  15. Department of Energy's Paducah Site Reaches Million-Hour Safety...

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

    KY - The U.S. Department of Energy's Paducah Site has reached a million hours of safe work toward completing cleanup objectives to reduce environmental risk. The LATA...

  16. Rutgers University in Newark ACenturyofReachingHigher

    E-Print Network [OSTI]

    Neimark, Alexander V.

    of Reaching Higher #12;The beer brewery is gone, as are the stables and razor-blade factory. In their places

  17. Rehabilitation of HLB infected trees when they reach

    E-Print Network [OSTI]

    Ma, Lena

    Rehabilitation of HLB infected trees when they reach economically unsustainable production Bob, 2012 #12;Objective 1. Salvage and Rehabilitate HLB Trees to Avoid Replanting 2. Rebalance the Shoot

  18. Reaching Rural Communities: Videoconferencing in K-12 Dance Education

    E-Print Network [OSTI]

    Parrish, Mila Dr.

    2009-01-01

    the needs of rural communities and a promising alternativeReaching Rural Communities: Videoconferencing in K-12 danceresources not found in rural communities (Schwier & Balbar,

  19. Electromyographic Correlates of Learning an Internal Model of Reaching Movements

    E-Print Network [OSTI]

    Shadmehr, Reza

    Electromyographic Correlates of Learning an Internal Model of Reaching Movements Kurt A we have found electromyographic correlates of internal model formation. We recorded EMG from four

  20. Walking Is Not Like Reaching: Evidence from Periodic Mechanical Perturbations

    E-Print Network [OSTI]

    Ahn, Jooeun

    The control architecture underlying human reaching has been established, at least in broad outline. However, despite extensive research, the control architecture underlying human locomotion remains unclear. Some studies ...

  1. Minimal Doubling and Point Splitting

    SciTech Connect (OSTI)

    Creutz, M.

    2010-06-14

    Minimally-doubled chiral fermions have the unusual property of a single local field creating two fermionic species. Spreading the field over hypercubes allows construction of combinations that isolate specific modes. Combining these fields into bilinears produces meson fields of specific quantum numbers. Minimally-doubled fermion actions present the possibility of fast simulations while maintaining one exact chiral symmetry. They do, however, introduce some peculiar aspects. An explicit breaking of hyper-cubic symmetry allows additional counter-terms to appear in the renormalization. While a single field creates two different species, spreading this field over nearby sites allows isolation of specific states and the construction of physical meson operators. Finally, lattice artifacts break isospin and give two of the three pseudoscalar mesons an additional contribution to their mass. Depending on the sign of this mass splitting, one can either have a traditional Goldstone pseudoscalar meson or a parity breaking Aoki-like phase.

  2. Neutrinoless Double Beta Decay Experiments

    E-Print Network [OSTI]

    Alberto Garfagnini

    2014-08-11

    Neutrinoless double beta decay is the only process known so far able to test the neutrino intrinsic nature: its experimental observation would imply that the lepton number is violated by two units and prove that neutrinos have a Majorana mass components, being their own anti-particle. While several experiments searching for such a rare decay have been performed in the past, a new generation of experiments using different isotopes and techniques have recently released their results or are taking data and will provide new limits, should no signal be observed, in the next few years to come. The present contribution reviews the latest public results on double beta decay searches and gives an overview on the expected sensitivities of the experiments in construction which will be able to set stronger limits in the near future.

  3. The World Within Reach University at Albany Strategic Plan

    E-Print Network [OSTI]

    Alexandrova, Ivana

    The World Within Reach University at Albany Strategic Plan October, 2010 #12;2 | P a g e The World Within Reach University at Albany Strategic Plan Contents Introduction, Mission, and Values 3 Strategic Goals 5 Strategic Plan Summary 7 Strategic Planning Detail 21 Appendix Strategic Planning

  4. Optic Ataxia: From Balint's Syndrome to the Parietal Reach Region

    E-Print Network [OSTI]

    Andersen, Richard

    Neuron Review Optic Ataxia: From Balint's Syndrome to the Parietal Reach Region Richard A. Andersen@vis.caltech.edu http://dx.doi.org/10.1016/j.neuron.2014.02.025 Optic ataxia is a high-order deficit in reaching's syndrome that also includes attentional and gaze disorders. Aspects of optic ataxia are misreaching

  5. Neutrinoless double beta decay

    E-Print Network [OSTI]

    K. Zuber

    2012-01-23

    The physics potential of neutrinoless double beta decay is discussed. Furthermore, experimental considerations are presented as well as the current status of experiments. Finally an outlook towards the future, work on nuclear matrix elements and alternative processes is given.

  6. Double Beta Decay

    E-Print Network [OSTI]

    Steven R. Elliott; Petr Vogel

    2002-02-27

    The motivation, present status, and future plans of the search for the neutrinoless double beta decay are reviewed. It is argued that, motivated by the recent observations of neutrino oscillations, there is a reasonable hope that neutrinoless double beta decay corresponding to the neutrino mass scale suggested by oscillations, of about 50 meV, actually exists. The challenges to achieve the sensitivity corresponding to this mass scale, and plans to overcome them, are described.

  7. Professional education and training for photovoltaics: Reaching all the sectors

    SciTech Connect (OSTI)

    Larsen, C.; Fitzpatrick, S.; Shirley, L.

    1999-07-01

    This paper considers a critical component of the PV infrastructure--the many non-installation related professionals--and how the PV industry and advocates can reach out to educate and train these groups. These professionals include inspectors, builders, developers, architects, utility engineers, lenders, appraisers, and realtors. Each one of these professionals plays a different role through the life of a PV project, and although some professionals are more critical than others, each needs PV-related education. This paper addresses each of these professional groups and their relevance to expanding PV markets. Recommendations are then made for bringing these professional groups to a reasonable stage of familiarity with PV. The focus here is on the development of an infrastructure for PV, but many of the ideas and recommendations apply equally well to other solar and renewable technologies. This paper does not address the training needs for PV installers because several other organizations are now giving attention to this audience since the authors conducted their original study in mid-1998. Many of the recommendations developed in this paper are based on a survey of individuals in the solar field. A survey of over 400 professionals involved in solar energy was conducted by the NC Solar Center in August 1998. Questions addressed both public and professional education needs for the expansion of markets for PV.

  8. The time to reach pseudosteady-state in horizontal wells 

    E-Print Network [OSTI]

    Al-Kahtani, Abdulghafour

    1998-01-01

    Engineers need to estimate the expected productivity of horizontal wells. We need to know how long it takes to reach pseudosteady-state to accept that estimation. When all boundaries influence the pressure distribution in the drainage area...

  9. New Stream-Reach Hydropower Development (NSD) Fact Sheet

    SciTech Connect (OSTI)

    2014-04-25

    This fact sheet explores the more than 65 gigawatts (GW) of sustainable hydropower potential in U.S. stream-reaches, according to the hydropower resource assessment funded by DOE and executed by Oak Ridge National Laboratory.

  10. Wind Turbine Inspection Technology Reaches New Heights | GE Global...

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

    Home > Edison's Desk > Wind Turbine Inspection Technology Reaches New Heights Click to email this to a friend (Opens in new window) Share on Facebook (Opens in new window) Click to...

  11. Biomass Power Generation Market Capacity is Estimated to Reach...

    Open Energy Info (EERE)

    Biomass Power Generation Market Capacity is Estimated to Reach 122,331.6 MW by 2022 Home > Groups > Renewable Energy RFPs Wayne31jan's picture Submitted by Wayne31jan(150)...

  12. Floating Production Systems Market Is Expected To Reach USD 38...

    Open Energy Info (EERE)

    Production Systems Market Is Expected To Reach USD 38,752.7 Million Globally By 2019 Home > Groups > Future of Condition Monitoring for Wind Turbines Wayne31jan's picture...

  13. Molecular Engineering of Conjugated Polymers to Reach Higher...

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

    Engineering of Conjugated Polymers to Reach Higher Efficiency "Plastic" Solar Cells November 12, 2010 at 3pm36-428 Wei You University of North Carolina you.wei001 abstract: The...

  14. Neutrinoless double beta decay search with the NEMO 3 experiment

    E-Print Network [OSTI]

    Irina Nasteva; for the NEMO 3 Collaboration

    2008-10-03

    The NEMO 3 experiment searches for neutrinoless double beta decay and makes precision measurements of two-neutrino double beta decay in seven isotopes. The latest two-neutrino half-life results are presented, together with the limits on neutrinoless half-lives and the corresponding effective Majorana neutrino masses. Also given are the limits obtained on neutrinoless double beta decay mediated by Rp-violating SUSY, right-hand currents and different Majoron emission modes.

  15. Neutrinoless double beta decay search with the NEMO 3 experiment

    SciTech Connect (OSTI)

    Nasteva, Irina [Particle Physics Group, School of Physics and Astronomy, University of Manchester, Manchester, M13 9PL (United Kingdom)

    2008-11-23

    The NEMO 3 experiment searches for neutrinoless double beta decay and makes precision measurements of two-neutrino double beta decay in seven isotopes. The latest two-neutrino half-life results are presented, together with the limits on neutrinoless half-lives and the corresponding effective Majorana neutrino masses. Also given are the limits obtained on neutrinoless double beta decay mediated by R{sub p}-violating SUSY, right-hand currents and different Majoron emission modes.

  16. A classification of channel-reach morphology in mountain drainage basins synthesizes stream morphologies into seven distinct reach types

    E-Print Network [OSTI]

    Montgomery, David R.

    ABSTRACT A classification of channel-reach morphology in mountain drainage basins synthesizes channel condition and response potential in mountain drainage basins. Field investigations demonstrate mountain channels and their lowland counterparts (e.g., Surell, 1841; Dana, 1850; Shaler, 1891

  17. A matterless double slit

    E-Print Network [OSTI]

    B. King; A. Di Piazza; C. H. Keitel

    2013-01-29

    Double-slits provide incoming photons with a choice. Those that survive the passage have chosen from two possible paths which interfere to distribute them in a wave-like manner. Such wave-particle duality continues to be challenged and investigated in a broad range of disciplines with electrons, neutrons, helium atoms, C60 fullerenes, Bose-Einstein condensates and biological molecules. All variants have hitherto involved material constituents. We present a matterless double-slit scenario in which photons generated from virtual electron-positron pair annihilation in head-on collisions of a probe laser field with two ultra-intense laser beams form a double-slit interference pattern. Such electromagnetic fields are predicted to induce material-like behaviour in the vacuum, supporting elastic scattering between photons. Our double-slit scenario presents on the one hand a realisable method to observe photon-photon scattering, and demonstrates on the other, the possibility of both controlling light with light and non-locally investigating features of the quantum vacuum's structure.

  18. Double resonator cantilever accelerometer

    DOE Patents [OSTI]

    Koehler, D.R.

    1982-09-23

    A digital quartz accelerometer includes a pair of spaced double-ended tuning forks fastened at one end to a base and at the other end through a spacer mass. Transverse movement of the resonator members stresses one and compresses the other, providing a differential frequency output which is indicative of acceleration.

  19. Neutrinoless Double Beta Decay

    E-Print Network [OSTI]

    Heinrich Päs; Werner Rodejohann

    2015-07-01

    We review the potential to probe new physics with neutrinoless double beta decay $(A,Z) \\to (A,Z+2) + 2 e^-$. Both the standard long-range light neutrino mechanism as well as short-range mechanisms mediated by heavy particles are discussed. We also stress aspects of the connection to lepton number violation at colliders and the implications for baryogenesis.

  20. Neutrinoless Double Beta Decay

    E-Print Network [OSTI]

    Päs, Heinrich

    2015-01-01

    We review the potential to probe new physics with neutrinoless double beta decay $(A,Z) \\to (A,Z+2) + 2 e^-$. Both the standard long-range light neutrino mechanism as well as short-range mechanisms mediated by heavy particles are discussed. We also stress aspects of the connection to lepton number violation at colliders and the implications for baryogenesis.

  1. Full Quantum Theory of ${C_{60}}$ Double-slit Diffraction

    E-Print Network [OSTI]

    Xiang-Yao Wu; Ji Ma; Bo-Jun Zhang; Hong Li; Xiao-Jing Liu; Nuo Ba; Si-Qi Zhang; Jing Wang; He Dong; Xin-Guo Yin

    2013-05-10

    In this paper, we apply the full new method of quantum theory to study the double-slit diffraction of ${C_{60}}$ molecules. We calculate the double-slit wave functions of ${C_{60}}$ molecules by Schr\\"{o}dinger equation, and calculate the diffraction wave function behind the slits with the Feynman path integral quantum theory, and then give the relation between the diffraction intensity of double-slit and diffraction pattern position. We compare the calculation results with two different double-slit diffraction experiments. When the decoherence effects are considered, the calculation results are in good agreement with the two experimental data.

  2. The effect of fluid flow on coiled tubing reach

    SciTech Connect (OSTI)

    Bhalla, K.; Walton, I.C.

    1996-12-31

    A critical parameter to the success of many coiled tubing (CT) operations in highly deviated or horizontal wells is the depth penetration that can be attained before the CT buckles and locks up. Achieving a desired depth is always critical in CT operations and attaining an additional reach of a few hundred feet can be crucial. This paper addresses the effect of fluid flow in the CT and in the CT/wellbore annulus on the state of force and stress in the CT, and thereby predicts its effect on the reach attainable by the CT. The flow of fluid through the CT and annulus between the CT and borehole modifies the pressures and the effective force which governs the mechanical stability of the CT. The net force per unit length due to fluid flow in the coiled tubing and annulus between the coiled tubing casing/well is calculated in terms of the shear stress and its effect on the onset of buckling and lockup is determined. The model is then implemented in a full tubing forces calculation and the effect of flowing fluids and producing fluids on reach is analyzed. The new model is utilized in the design of commercial jobs. The exact analytic model shows that fluid flow inside the CT has zero impact on reach, that downward flow in the annulus has a favourable impact, and upward flow in the annulus reduces the maximum attainable reach. Using the full tubing forces model, a coiled tubing job can be designed taking into account the flow of a fluid with a specified rheology, density and flow rate. Thus the feasibility of attaining a given reach can be more accurately determined. Results are presented in the form of the surface weight for commercial wells and compared to field jobs.

  3. The COBRA Double Beta Decay Experiment

    SciTech Connect (OSTI)

    Dawson, J. V. [Department of Physics and Astronomy, University of Sussex, Brighton. BN1 9QH (United Kingdom)

    2007-03-28

    The progress of the COBRA neutrinoless double beta decay experiment is discussed. Potential backgrounds are described. Estimates on the contamination levels of 214Bi in the detectors have been made using previously acquired low background data. New crystals with a different passivation material show an improved background count rate of approximately one order of magnitude.

  4. A background free double beta decay experiment

    E-Print Network [OSTI]

    Ioannis Giomataris

    2010-12-20

    We present a new detection scheme for rejecting backgrounds in neutrino less double beta decay experiments. It relies on the detection of Cherenkov light emitted by electrons in the MeV region. The momentum threshold is tuned to reach a good discrimination between background and good events. We consider many detector concepts and a range of target materials. The most promising is a high-pressure 136Xe emitter for which the required energy threshold is easily adjusted. Combination of this concept and a high pressure Time Projection Chamber could provide an optimal solution. A simple and low cost effective solution is to use the Spherical Proportional Counter that provides two delayed signals from ionization and Cherenkov light. In solid-state double beta decay emitters, because of their higher density, the considered process is out of energy range. An alternative solution could be the development of double decay emitters with lower density by using for instance the aerogel technique. It is surprising that a technology used for particle identification in high-energy physics becomes a powerful tool for rejecting backgrounds in such low-energy experiments.

  5. WHY SEARCH FOR DOUBLE BETA DECAY?

    E-Print Network [OSTI]

    Kayser, B.

    2010-01-01

    the search for neutrinoless double beta decay may prove verySearching for neutrinoless double beta decay is the onlysensitivity of neutrinoless double beta decay. The potential

  6. Patterns of Arm Muscle Activation Involved in Octopus Reaching Movements

    E-Print Network [OSTI]

    Hochner, Binyamin

    Patterns of Arm Muscle Activation Involved in Octopus Reaching Movements Yoram Gutfreund,1 Tamar, Stazione Zoologica "A. Dohrn," Naples 80121, Italy The extreme flexibility of the octopus arm allows a basic invariant motor structure: a bend traveling from the base of the arm toward the tip (Gutfreund et

  7. continued on page 5-6 A Global Reach

    E-Print Network [OSTI]

    California at Berkeley, University of

    Fong Optometry and Health Sciences Library Physics-Astronomy Library Sheldon Margen Public Healthcontinued on page 5-6 A Global Reach LIBRARIAN JIM CHURCH CULTIVATES THE UNCONVENTIONAL THE LIBRARY of the LIBRARY | 2013- 14 "I tell people jokingly, Berkeley is all about mayhem. I like the crazy energy

  8. Recent Results in Neutrinoless Double Beta Decay

    E-Print Network [OSTI]

    Lisa J. Kaufman

    2013-05-14

    The search for neutrinoless double beta decay is a rich source for new physics. The observation of this decay will lead to understanding of the absolute mass scale of neutrinos, the Majorana nature of the neutrino (whether the neutrino is its own anti-particle), and lepton number violation. Double beta decay is being investigated around the world by several experiments using different candidate isotopes. There has been much progress made in experimental techniques recently such that achieving sensitivity to neutrino masses at 50 meV and below will be possible in the near future. A summary of recent results in neutrinoless double beta decay is discussed with a look toward the experimental goals for the future.

  9. Double Beta Decay Experiments

    SciTech Connect (OSTI)

    Nanal, Vandana [Dept. of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Mumbai 400 005 (India)

    2011-11-23

    At present, neutrinoless double beta decay is perhaps the only experiment that can tell us whether the neutrino is a Dirac or a Majorana particle. Given the significance of the 0{nu}{beta}{beta}, there is a widespread interest for these rare event studies employing a variety of novel techniques. This paper describes the current status of DBD experiments. The Indian effort for an underground NDBD experiment at the upcoming INO laboratory is also presented.

  10. for doubling solar panel

    E-Print Network [OSTI]

    An outline for doubling solar panel efficiency C o l o ra do S c ho o l of M i ne s Ma g a z i ne Take a look at a solar panel on a sunny Colorado day and, if you're like most people, you won't see physics professor and solar energy researcher, who admits to checking out his panels and their energy

  11. The Discovery reach of $CP$ violation in neutrino oscillation with non-standard interaction effects

    E-Print Network [OSTI]

    Zini Rahman; Arnab Dasgupta; Rathin Adhikari

    2015-03-11

    We have studied the $CP$ violation discovery reach in neutrino oscillation experiment with superbeam, neutrino factory and monoenergetic neutrino beam. For NSI satisfying model-dependent bound for shorter baselines (like CERN-Fr\\'ejus set-up ) there is insignificant effect of NSI on the the discovery reach of $CP$ violation due to $\\delta$. Particularly, for superbeam and neutrino factory we have also considered relatively longer baselines for which there could be significant NSI effects on $CP$ violation discovery reach for higher allowed values of NSI. For monoenergetic beam only shorter baselines are considered to study $CP$ violation with different nuclei as neutrino sources. Interestingly for non-standard interactions - $\\varepsilon_{e\\mu}$ and $\\varepsilon_{e\\tau}$ of neutrinos with matter during propagation in longer baselines in superbeam, there is possibility of better discovery reach of $CP$ violation than that with only Standard Model interactions of neutrinos with matter. For complex NSI we have shown the $CP$ violation discovery reach in the plane of Dirac phase $\\delta$ and NSI phase $\\phi_{ij}$. The $CP$ violation due to some values of $\\delta $ remain unobservable with present and near future experimental facilities in superbeam and neutrino factory . However, in presence of some ranges of off-diagonal NSI phase values there are some possibilities of discovering total $CP$ violation for any $\\delta_{CP}$ value at $5 \\sigma$ for neutrino factory. Our analysis indicates that for some values of NSI phases total $CP$ violation may not be at all observable for any values of $\\delta $. Using a neutrino beam from electron capture process for nuclei $^{110}_{50}$Sn and $^{152}$Yb, we have shown the discovery reach of $CP$ violation in neutrino oscillation experiment.

  12. Neutrinoless Double Beta Decay in Particle Physics

    E-Print Network [OSTI]

    Werner Rodejohann

    2010-11-22

    Neutrinoless double beta decay is a process of fundamental importance for particle physics. It can be mediated by light massive Majorana neutrinos (standard interpretation) or by something else (non-standard interpretations). We review its dependence on the neutrino parameters, its complementarity to other observables sensitive to neutrino mass, and emphasize its ability to distinguish different neutrino mass models. Then we discuss mechanisms different from light Majorana neutrino exchange, and show what can be learned from those and how they could be tested.

  13. PROGRAM REACHES DIVERSE NORTH CAROLINA COMMUNITY | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematicsEnergyInterested PartiesBuilding energy codes have a PRIVACY IMPACT ASSESSMENT:PROGRAM REACHES

  14. DISCOVERY OF THE TWO-NEUTRINO DOUBLE-BETA DECAY OF XENON-136 WITH EXO-200

    E-Print Network [OSTI]

    Gratta, Giorgio

    mass differences, not the absolute mass scale. Neutrinoless double-beta decay, a hypothetical nuclear, and is located deep underground in a New Mexico salt mine to evade cosmic rays. Neutrinoless double-beta decay to measure. Neutrinoless double-beta decay can be used to measure the neutrino mass--until recently believed

  15. Neutrinoless Double Beta Decay with SNO+

    E-Print Network [OSTI]

    J. Hartnell; for the SNO+ collaboration

    2012-01-30

    SNO+ will search for neutrinoless double beta decay by loading 780 tonnes of linear alkylbenzene liquid scintillator with O(tonne) of neodymium. Using natural Nd at 0.1% loading will provide 43.7 kg of 150Nd given its 5.6% abundance and allow the experiment to reach a sensitivity to the effective neutrino mass of 100-200 meV at 90% C.L in a 3 year run. The SNO+ detector has ultra low backgrounds with 7000 tonnes of water shielding and self-shielding of the scintillator. Distillation and several other purification techniques will be used with the aim of achieving Borexino levels of backgrounds. The experiment is fully funded and data taking with light-water will commence in 2012 with scintillator data following in 2013.

  16. Defining a controller architecture for the Long-Reach Manipulator

    SciTech Connect (OSTI)

    Ford, W.E.

    1994-06-01

    To draft a procurement specification for the Long-Reach Manipulator (LRM), the benefits and limitations of the various robotic control system architectures available need to be determined. This report identifies and describes the advantages and potential disadvantages of using an open control system versus a closed (or proprietary) system, focusing on integration of interfaces for sensors, end effectors, tooling, and operator interfaces. In addition, the various controls methodologies of several recent systems are described. Finally, the reasons behind the recommendation to procure an open control system are discussed.

  17. Energy Reduction Projects to Help Nissan Reach BBBP Goals 

    E-Print Network [OSTI]

    Rasmussen, B.

    2013-01-01

    Projects to Help Nissan Reach BBBP Goals Brett Rasmussen, PE, CEM Senior Energy Engineer Nissan North America May 23, 2013 ESL-IE-13-05-38 Proceedings of the Thrity-Fifth Industrial Energy Technology Conference New Orleans, LA. May 21-24, 2013... ? ? ? Smyrna, TN Decherd, TN Canton, MS NISSAN?S U.S. PLANTS 2 ESL-IE-13-05-38 Proceedings of the Thrity-Fifth Industrial Energy Technology Conference New Orleans, LA. May 21-24, 2013 Bill Kruger Signs the Save Energy Now Leader Pledge Dec 2nd 2009 ESL...

  18. Supercomputers Help a Catalyst Reach its Full Potential

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservationBio-Inspired Solar Fuel Production 1: Total systemsSuccessHelp a Catalyst Reach

  19. Berkeley Lab and NERSC Reach Out to Women in Computing

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room News PublicationsAudits & Inspections AuditsBarbara2.0.1BenBerkeley LabNERSC Reaches Out to

  20. Reaching the hip-hop generation: Final (symposium proceedings) report

    SciTech Connect (OSTI)

    Not Available

    1993-05-01

    The goal of this final (closing) report is to capture the flavor of the symposium held March 1 and 2, 1993 in New York City convened by Motivational Educational Entertainment, Inc. (MEE), a black-owned communications research, consulting, and video production company based in Philadelphia, Pennsylvania. The mission of MEE is to understand, reach, and positively affect inner-city youth. Traditional communication approaches from mainstream sources to at-risk youth often don`t account for the unique way youth communicate among themselves and how they relate to the media. This understanding, however, is crucial. To understand youth communication, the people who create and send both entertaining and educational messages to urban youth must be brought into the dialogue. The meeting in New York was intended to provide an important opportunity for senders to meet and evaluate the appropriateness and effectiveness of their messages. In addition, the MEE symposium provided a forum for the continuing public debate about what needs to be done to reach today`s urban teens. Included in this document is a description of symposium goals/objectives, symposium activities, the reaction to and analysis of the symposium, recommendations for future MEE courses of action, and an appendix containing copies of press articles.

  1. Neutrinoless double beta decay in seesaw models

    E-Print Network [OSTI]

    Mattias Blennow; Enrique Fernandez-Martinez; Jacobo Lopez-Pavon; Javier Menendez

    2014-05-12

    We study the general phenomenology of neutrinoless double beta decay in seesaw models. In particular, we focus on the dependence of the neutrinoless double beta decay rate on the mass of the extra states introduced to account for the Majorana masses of light neutrinos. For this purpose, we compute the nuclear matrix elements as functions of the mass of the mediating fermions and estimate the associated uncertainties. We then discuss what can be inferred on the seesaw model parameters in the different mass regimes and clarify how the contribution of the light neutrinos should always be taken into account when deriving bounds on the extra parameters. Conversely, the extra states can also have a significant impact, cancelling the Standard Model neutrino contribution for masses lighter than the nuclear scale and leading to vanishing neutrinoless double beta decay amplitudes even if neutrinos are Majorana particles. We also discuss how seesaw models could reconcile large rates of neutrinoless double beta decay with more stringent cosmological bounds on neutrino masses.

  2. Double Tracks revegetation and monitoring plan

    SciTech Connect (OSTI)

    NONE

    1997-07-01

    This document is a reclamation plan for short-term and long-term stabilization of land disturbed by activities associated with interim clean-up of radionuclide-contaminated surface soil at the Double Tracks site. This document has been prepared to provide general reclamation practices and procedures that will be followed during restoration of the cleanup site. Reclamation demonstration plots were established near the site in the fall of 1994 to evaluate the performance of several native species and to evaluate different irrigation strategies. Results of the study at Double Tracks, as well as the results from numerous studies conducted at other sites (Area 11 and Area 19 of the Nevada Test Site), have been summarized and incorporated into this final reclamation plan for the interim cleanup of the Double Tracks site, located northwest of the Nevada Test Site on the Nellis Air Force Range. Surface soils at Double Tracks were contaminated as a result of the detonation of a device containing plutonium and depleted uranium using chemical explosives. The total amount of Pu deposited on the site was between 980 and 1,600 grams and was scattered downwind south of the detonation site. Short-term stabilization consists of the application of a chemical soil stabilizer that is applied immediately following excavation of the contaminated soils to minimize Pu resuspension. Long-term stabilization is accomplished by the establishment of a permanent vegetation.

  3. Neutrinoless Double Beta Decay, the Inverted Hierarchy and Precision Determination of theta(12)

    E-Print Network [OSTI]

    Alexander Dueck; Werner Rodejohann; Kai Zuber

    2011-04-17

    Ruling out the inverted neutrino hierarchy with neutrinoless double beta decay experiments is possible if a limit on the effective mass below the minimal theoretically possible value is reached. We stress that this lower limit depends strongly on the value of the solar neutrino mixing angle: it introduces an uncertainty of a factor of 2 within its current 3 sigma range. If an experiment is not background-free, a factor of two in effective mass corresponds to a combined factor of 16 improvement for the experimental parameters running time, detector mass, background level and energy resolution. Therefore, a more precise determination of theta(12) is crucial for the interpretation of experimental results and the evaluation of the potential and requirements for future experiments. We give the required half-lifes to exclude (and touch) the inverted hierarchy regime for all double beta decay isotopes with a Q-value above 2 MeV. The nuclear matrix elements from 6 different groups and, if available, their errors are used and compared. We carefully put the calculations on equal footing in what regards various convention issues. We also use our compilation of matrix elements to give the reachable values of the effective mass for a given half-life value.

  4. Constraints on light neutrino parameters derived from the study of neutrinoless double beta decay

    E-Print Network [OSTI]

    Sabin Stoica; Andrei Neacsu

    2014-05-02

    The study of the neutrinoless double beta ($0 \\beta\\beta$) decay mode can provide us with important information on the neutrino properties, particularly on the electron neutrino absolute mass. In this work we revise the present constraints on the neutrino mass parameters derived from the $0 \\beta\\beta$ decay analysis of the experimentally interesting nuclei. We use the latest results for the phase space factors (PSFs) and nuclear matrix elements (NMEs), as well as for the experimental lifetimes limits. For the PSFs we use values computed with an improved method reported very recently. For the NMEs we use values chosen from literature on a case-by-case basis, taking advantage of the consensus reached by the community on several nuclear ingredients used in their calculation. Thus, we try to restrict the range of spread of the NME values calculated with di?erent methods and, hence, to reduce the uncertainty in deriving limits for the Majorana neutrino mass parameter. Our results may be useful to have an up-date image on the present neutrino mass sensitivities associated with $0 \\beta\\beta$ measurements for different isotopes and to better estimate the range of values of the neutrino masses that can be explored in the future double beta decay (DBD) experiments.

  5. Reaching the quantum limit of sensitivity in electron spin resonance

    E-Print Network [OSTI]

    A. Bienfait; J. J. Pla; Y. Kubo; M. Stern; X. Zhou; C. C. Lo; C. D. Weis; T. Schenkel; M. L. W. Thewalt; D. Vion; D. Esteve; B. Julsgaard; K. Moelmer; J. J. L. Morton; P. Bertet

    2015-07-24

    We report pulsed electron-spin resonance (ESR) measurements on an ensemble of Bismuth donors in Silicon cooled at 10mK in a dilution refrigerator. Using a Josephson parametric microwave amplifier combined with high-quality factor superconducting micro-resonators cooled at millikelvin temperatures, we improve the state-of-the-art sensitivity of inductive ESR detection by nearly 4 orders of magnitude. We demonstrate the detection of 1700 bismuth donor spins in silicon within a single Hahn echo with unit signal-to-noise (SNR) ratio, reduced to just 150 spins by averaging a single Carr-Purcell-Meiboom-Gill sequence. This unprecedented sensitivity reaches the limit set by quantum fluctuations of the electromagnetic field instead of thermal or technical noise, which constitutes a novel regime for magnetic resonance.

  6. Reach the Bottom Line of the Sbottom Search

    SciTech Connect (OSTI)

    Alvarez, Ezequiel; Bai, Yang

    2012-05-22

    We propose a new search strategy for directly-produced sbottoms at the LHC with a small mass splitting between the sbottom and its decayed stable neutralino. Our search strategy is based on boosting sbottoms through an energetic initial state radiation jet. In the final state, we require a large missing transverse energy and one or two b-jets besides the initial state radiation jet. We also define a few kinematic variables to further increase the discovery reach. For the case that the sbottom mainly decays into the bottom quark and the stable neutralino, we have found that even for a mass splitting as small as 10 GeV sbottoms with masses up to around 400 GeV can be excluded at the 95% confidence level with 20 inverse femtobarn data at the 8 TeV LHC.

  7. Neutrinoless Double Phys 135c Spring 2007

    E-Print Network [OSTI]

    Golwala, Sunil

    Neutrinoless Double Beta Decay Phys 135c Spring 2007 Michael Mendenhall #12;Theory Overview #12 beta decays #12;neutrinoless double beta decays n e- p beta decay e #12;neutrinoless double beta decays n e- p beta decay e n e- p n e- p double beta decay e e #12;neutrinoless double beta decays n e- p

  8. Band Tunneling through Double Barrier in Bilayer Graphene

    E-Print Network [OSTI]

    Hasan A. Alshehab; Hocine Bahlouli; Abderrahim El Mouhafid; Ahmed Jellal

    2014-01-20

    By taking into account the full four band energy spectrum, we calculate the transmission probability and conductance of electrons across symmetric and asymmetric double potential barrier with a confined interlayer potential difference in bilayer graphene. For energies less than the interlayer coupling \\gamma_{1}, E \\gamma_{1}, we obtain four possible ways for transmission resulting from the two propagating modes. We compute the associated transmission probabilities as well as their contribution to the conductance, study the effect of the double barrier geometry.

  9. NEMO 3 double beta decay experiment: latest results

    E-Print Network [OSTI]

    A. S. Barabash

    2008-07-17

    The double beta decay experiment NEMO~3 has been taking data since February 2003. The aim of this experiment is to search for neutrinoless decay and investigate two neutrino double beta decay in seven different enriched isotopes ($^{100}$Mo,$^{82}$Se, $^{48}$Ca, $^{96}$Zr, $^{116}$Cd, $^{130}$Te and $^{150}$Nd). After analysis of the data corresponding to 693 days, no evidence for $0\

  10. Simulation of Double-Pulse Laser Ablation

    SciTech Connect (OSTI)

    Povarnitsyn, Mikhail E.; Khishchenko, Konstantin V.; Levashov, Pavel R. [Joint Institute for High Temperatures of RAS, Izhorskaya 13 Bldg 2, Moscow, 125412 (Russian Federation); Itina, Tatian E. [Laboratoire Hubert Curien, UMR CNRS 5516, 18 rue Benoit Lauras, Bat. F, 42000, St-Etienne (France)

    2010-10-08

    We investigate the physical reasons of a strange decrease in the ablation depth observed in femtosecond double-pulse experiments with increasing delay between the pulses. Two ultrashort pulses of the same energy produce the crater which is less than that created by a single pulse. Hydrodynamic simulation shows that the ablation mechanism is suppressed when the delay between the pulses exceeds the electron-ion relaxation time. In this case, the interaction of the second laser pulse with the expanding target material leads to the formation of the second shock wave suppressing the rarefaction wave created by the first pulse. The modeling of the double-pulse ablation for different delays between pulses confirms this explanation.

  11. Turkey Marine Lubricants Market is Expected to Reach USD 177...

    Open Energy Info (EERE)

    are primarily categorized into seven different applications including engine oils, hydraulic oils, grease, turbine oils, gear oils, compressor oils and heat transfer fluids....

  12. The Majorana Neutrinoless Double-Beta Decay Experiment

    E-Print Network [OSTI]

    V. E. Guiseppe; for the Majorana Collaboration

    2008-11-15

    Neutrinoless double-beta decay searches play a major role in determining the nature of neutrinos, the existence of a lepton violating process, and the effective Majorana neutrino mass. The Majorana Collaboration proposes to assemble an array of HPGe detectors to search for neutrinoless double-beta decay in Ge-76. Our proposed method uses the well-established technique of searching for neutrinoless double-beta decay in high purity Ge-diode radiation detectors that play both roles of source and detector. The technique is augmented with recent improvements in signal processing and detector design, and advances in controlling intrinsic and external backgrounds. Initially, Majorana aims to construct a prototype module containing 60 kg of Ge detectors to demonstrate the potential of a future 1-tonne experiment. The design and potential reach of this prototype Demonstrator module will be presented. This paper will also discuss detector optimization and low-background requirements, such as material purity, background rejection, and identification of rare backgrounds required to reach the sensitivity goals of the Majorana experiment.

  13. Double acting bit holder

    DOE Patents [OSTI]

    Morrell, Roger J. (Blommington, MN); Larson, David A. (Minneapolis, MN); Ruzzi, Peter L. (Eagan, MN)

    1994-01-01

    A double acting bit holder that permits bits held in it to be resharpened during cutting action to increase energy efficiency by reducing the amount of small chips produced. The holder consist of: a stationary base portion capable of being fixed to a cutter head of an excavation machine and having an integral extension therefrom with a bore hole therethrough to accommodate a pin shaft; a movable portion coextensive with the base having a pin shaft integrally extending therefrom that is insertable in the bore hole of the base member to permit the moveable portion to rotate about the axis of the pin shaft; a recess in the movable portion of the holder to accommodate a shank of a bit; and a biased spring disposed in adjoining openings in the base and moveable portions of the holder to permit the moveable portion to pivot around the pin shaft during cutting action of a bit fixed in a turret to allow front, mid and back positions of the bit during cutting to lessen creation of small chip amounts and resharpen the bit during excavation use.

  14. Double Chooz: Latest results

    E-Print Network [OSTI]

    J. I. Crespo-Anadón; for the Double Chooz collaboration

    2014-12-11

    The latest results from the Double Chooz experiment on the neutrino mixing angle $\\theta_{13}$ are presented. A detector located at an average distance of 1050 m from the two reactor cores of the Chooz nuclear power plant has accumulated a live time of 467.90 days, corresponding to an exposure of 66.5 GW-ton-year (reactor power $\\times$ detector mass $\\times$ live time). A revised analysis has boosted the signal efficiency and reduced the backgrounds and systematic uncertainties compared to previous publications, paving the way for the two detector phase. The measured $\\sin^2 2\\theta_{13} = 0.090^{+0.032}_{-0.029}$ is extracted from a fit to the energy spectrum. A deviation from the prediction above a visible energy of 4 MeV is found, being consistent with an unaccounted reactor flux effect, which does not affect the $\\theta_{13}$ result. A consistent value of $\\theta_{13}$ is measured in a rate-only fit to the number of observed candidates as a function of the reactor power, confirming the robustness of the result.

  15. The Optimal Mix of TV and Online Ads to Maximize Reach

    E-Print Network [OSTI]

    Cortes, Corinna

    The Optimal Mix of TV and Online Ads to Maximize Reach Yuxue Jin, Georg M. Goerg, Nicolas Remy, Jim allocate budget between TV and online ads in order to maximize reach or maintain the same reach at a lower budget allocation between TV and online ads to maximize reach to the target demographics. We take

  16. Slug pellet spreading: the double-disc performances available with a single disc spreader

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Slug pellet spreading: the double-disc performances available with a single disc spreader D for slug pellets application. The principal aim of this paper is to show the chosen way to reach spreading pellets 1 Introduction In France, slugs are considered as a harmful destroyer for crops. Their activities

  17. Analysis of the Double Window in Saving Energy and Economical Efficiency in Nanjing in the Winter 

    E-Print Network [OSTI]

    Zhang, Y.; He, J.; Gao, S.

    2006-01-01

    steel window can save energy by 37.68% is reached. As part of the economical efficiency analysis, an investment payback period is analyzed using the methods of static state and dynamic state. The analysis shows that by using single frame-double plastic...

  18. Species Doubling and Chiral Lagrangians

    E-Print Network [OSTI]

    Michael Creutz; Michel Tytgat

    1996-05-15

    Coupling gauge fields to the chiral currents from an effective Lagrangian for pseudoscalar mesons naturally gives rise to a species doubling phenomenon similar to that seen with fermionic fields in lattice gauge theory.

  19. Energy levels of double triangular graphene quantum dots

    SciTech Connect (OSTI)

    Liang, F. X.; Jiang, Z. T. Zhang, H. Y.; Li, S.; Lv, Z. T.

    2014-09-28

    We investigate theoretically the energy levels of the coupled double triangular graphene quantum dots (GQDs) based on the tight-binding Hamiltonian model. The double GQDs including the ZZ-type, ZA-type, and AA-type GQDs with the two GQDs having the zigzag or armchair boundaries can be coupled together via different interdot connections, such as the direct coupling, the chains of benzene rings, and those of carbon atoms. It is shown that the energy spectrum of the coupled double GQDs is the amalgamation of those spectra of the corresponding two isolated GQDs with the modification triggered by the interdot connections. The interdot connection is inclined to lift up the degeneracies of the energy levels in different degree, and as the connection changes from the direct coupling to the long chains, the removal of energy degeneracies is suppressed in ZZ-type and AA-type double GQDs, which indicates that the two coupled GQDs are inclined to become decoupled. Then we consider the influences on the spectra of the coupled double GQDs induced by the electric fields applied on the GQDs or the connection, which manifests as the global spectrum redistribution or the local energy level shift. Finally, we study the symmetrical and asymmetrical energy spectra of the double GQDs caused by the substrates supporting the two GQDs, clearly demonstrating how the substrates affect the double GQDs' spectrum. This research elucidates the energy spectra of the coupled double GQDs, as well as the mechanics of manipulating them by the electric field and the substrates, which would be a significant reference for designing GQD-based devices.

  20. Neutrinoless double beta decay in four-neutrino models

    E-Print Network [OSTI]

    Anna Kalliomaki; Jukka Maalampi

    2000-03-29

    The most stringent constraint on the so-called effective electron neutrino mass from the present neutrinoless double beta decay experiments is |M_{ee}| < 0.2 eV, while the planned next generation experiment GENIUS is anticipated to reach a considerably more stringent limit |M_{ee}|< 0.001 eV. We investigate the constraints these bounds set on the neutrino masses and mixings of neutrinos in four-neutrino models where there exists a sterile neutrino along with the three ordinary neutrinos. We find that the GENIUS experiment would be sensitive to the electron neutrino masses down to the limit m_{\

  1. Search of Neutrinoless Double Beta Decay with the GERDA Experiment

    E-Print Network [OSTI]

    Giovanni Benato

    2015-09-25

    The Gerda experiment designed to search for the neutrinoless double beta decay in 76Ge has successfully completed the first data collection. No signal excess is found, and a lower limit on the half life of the process is set, with T1/2 > 2.1x10^25 yr (90% CL). After a review of the experimental setup and of the main Phase I results, the hardware upgrade for Gerda Phase II is described, and the physics reach of the new data collection is reported.

  2. Neutrinoless Double Beta Decay: Low Left-Right Symmetry Scale?

    E-Print Network [OSTI]

    Miha Nemevsek; Fabrizio Nesti; Goran Senjanovic; Vladimir Tello

    2011-12-20

    Experiments in progress may confirm a nonzero neutrinoless double beta decay rate in conflict with the cosmological upper limit on neutrino masses and thus require new physics beyond the Standard Model. A natural candidate is the Left-Right symmetric theory, which led originally to neutrino mass and the seesaw mechanism. In the absence of cancelations of large Dirac Yukawa couplings, we show how such a scenario would require a low scale of Left-Right symmetry breaking roughly below 10 TeV, tantalizingly close to the LHC reach.

  3. Search of Neutrinoless Double Beta Decay with the GERDA Experiment

    E-Print Network [OSTI]

    Benato, Giovanni

    2015-01-01

    The Gerda experiment designed to search for the neutrinoless double beta decay in 76Ge has successfully completed the first data collection. No signal excess is found, and a lower limit on the half life of the process is set, with T1/2 > 2.1x10^25 yr (90% CL). After a review of the experimental setup and of the main Phase I results, the hardware upgrade for Gerda Phase II is described, and the physics reach of the new data collection is reported.

  4. DOE and NASA Reach Cleanup Agreements with the State of California...

    Energy Savers [EERE]

    DOE and NASA Reach Cleanup Agreements with the State of California for the Santa Susana Field Laboratory DOE and NASA Reach Cleanup Agreements with the State of California for the...

  5. Texas-New Mexico Power Company - Residential, Hard-to-Reach,...

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

    Texas-New Mexico Power Company - Residential, Hard-to-Reach, and High-Performance New Homes Programs Texas-New Mexico Power Company - Residential, Hard-to-Reach, and...

  6. Predicting Neutrinoless Double Beta Decay

    E-Print Network [OSTI]

    M. Hirsch; Ernest Ma; J. W. F. Valle; A. Villanova del Moral

    2005-07-12

    We give predictions for the neutrinoless double beta decay rate in a simple variant of the A_4 family symmetry model. We show that there is a lower bound for the neutrinoless double beta decay amplitude even in the case of normal hierarchical neutrino masses, corresponding to an effective mass parameter |m_{ee}| >= 0.17 \\sqrt{\\Delta m^2_{ATM}}. This result holds both for the CP conserving and CP violating cases. In the latter case we show explicitly that the lower bound on |m_{ee}| is sensitive to the value of the Majorana phase. We conclude therefore that in our scheme, neutrinoless double beta decay may be accessible to the next generation of high sensitivity experiments.

  7. New Double Soft Emission Theorems

    E-Print Network [OSTI]

    Freddy Cachazo; Song He; Ellis Ye Yuan

    2015-03-16

    We study the behavior of the tree-level S-matrix of a variety of theories as two particles become soft. By analogy with the recently found subleading soft theorems for gravitons and gluons, we explore subleading terms in double soft emissions. We first consider double soft scalar emissions and find subleading terms that are controlled by the angular momentum operator acting on hard particles. The order of the subleading theorems depends on the presence or not of color structures. Next we obtain a compact formula for the leading term in a double soft photon emission. The theories studied are a special Galileon, DBI, Einstein-Maxwell-Scalar, NLSM and Yang-Mills-Scalar. We use the recently found CHY representation of these theories in order to give a simple proof of the leading order part of all these theorems

  8. Double stranded nucleic acid biochips

    DOE Patents [OSTI]

    Chernov, Boris; Golova, Julia

    2006-05-23

    This invention describes a new method of constructing double-stranded DNA (dsDNA) microarrays based on the use of pre-synthesized or natural DNA duplexes without a stem-loop structure. The complementary oligonucleotide chains are bonded together by a novel connector that includes a linker for immobilization on a matrix. A non-enzymatic method for synthesizing double-stranded nucleic acids with this novel connector enables the construction of inexpensive and robust dsDNA/dsRNA microarrays. DNA-DNA and DNA-protein interactions are investigated using the microarrays.

  9. Neutrinoless Double Beta Decay Constraints

    E-Print Network [OSTI]

    Hiroaki Sugiyama

    2003-07-25

    A brief overview is given of theoretical analyses with neutrinoless double beta decay experiments. Theoretical bounds on the ``observable'', _betabeta, are presented. By using experimental bounds on _betabeta, allowed regions are obtained on the m_l-cos{2theta_12} plane, where m_l stands for the lightest neutrino mass. It is shown that Majorana neutrinos can be excluded by combining possible results of future neutrinoless double beta decay and {}^3H beta decay experiments. A possibility to constrain one of two Majorana phases is discussed also.

  10. Constraining neutrinoless double beta decay

    E-Print Network [OSTI]

    L. Dorame; D. Meloni; S. Morisi; E. Peinado; J. W. F. Valle

    2011-11-23

    A class of discrete flavor-symmetry-based models predicts constrained neutrino mass matrix schemes that lead to specific neutrino mass sum-rules (MSR). We show how these theories may constrain the absolute scale of neutrino mass, leading in most of the cases to a lower bound on the neutrinoless double beta decay effective amplitude.

  11. Large Hadron Collider probe of supersymmetric neutrinoless double beta decay mechanism

    E-Print Network [OSTI]

    B. C. Allanach; C. H. Kom; H. Päs

    2009-02-26

    In the minimal supersymmetric extension to the Standard Model, a non-zero lepton number violating coupling lambda'_111 predicts both neutrinoless double beta decay and resonant single slepton production at the LHC. We show that, in this case, if neutrinoless double beta decay is discovered in the next generation of experiments, there exist good prospects to observe single slepton production at the LHC. Neutrinoless double beta decay could otherwise result from a different source (such as a non-zero Majorana neutrino mass). Resonant single slepton production at the LHC can therefore discriminate between the lambda'_111 neutrinoless double beta decay mechanism and others.

  12. Large Hadron Collider Probe of Supersymmetric Neutrinoless Double-Beta-Decay Mechanism

    SciTech Connect (OSTI)

    Allanach, B. C.; Kom, C. H.; Paes, H. [DAMTP, University of Cambridge, Wilberforce Road, Cambridge, CB3 0WA (United Kingdom); Cavendish Laboratory, J. J. Thomson Avenue, Cambridge CB3 0HE (United Kingdom); Fakultaet fuer Physik, Technische Universitaet Dortmund, D-44221, Dortmund (Germany)

    2009-08-28

    In the minimal supersymmetric extension to the standard model, a nonzero lepton number violating coupling {lambda}{sub 111}{sup '} predicts both neutrinoless double-beta-decay and resonant single slepton production at the LHC. We show that, in this case, if neutrinoless double beta decay is discovered in the next generation of experiments, there exist good prospects to observe single slepton production at the LHC. Neutrinoless double beta decay could otherwise result from a different source (such as a nonzero Majorana neutrino mass). Resonant single slepton production at the LHC can therefore discriminate between the {lambda}{sub 111}{sup '} neutrinoless double-beta-decay mechanism and others.

  13. Quasiparticle random phase approximation uncertainties and their correlations in the analysis of neutrinoless double beta decay

    E-Print Network [OSTI]

    Amand Faessler; G. L. Fogli; E. Lisi; V. Rodin; A. M. Rotunno; F. Simkovic

    2009-03-06

    The variances and covariances associated to the nuclear matrix elements (NME) of neutrinoless double beta decay are estimated within the quasiparticle random phase approximation (QRPA). It is shown that correlated NME uncertainties play an important role in the comparison of neutrinoless double beta decay rates for different nuclei, and that they are degenerate with the uncertainty in the reconstructed Majorana neutrino mass.

  14. Effects of New Gravitational Interactions on Neutrinoless Double Beta Decay

    E-Print Network [OSTI]

    H. V. Klapdor--Kleingrothaus; H. Päs; U. Sarkar

    2000-04-13

    It has recently been proposed that violations of Lorentz invariance or violations of the equivalence principle can be constrained from the non-observation of neutrinoless double beta decay. We generalize this analysis to all possible new gravitational interactions and discuss briefly the constraints for different cases.

  15. Spawning Habitat Studies of Hanford Reach Fall Chinook Salmon (Oncorhynchus tshawytscha), Final Report.

    SciTech Connect (OSTI)

    Geist, David R.; Arntzen, Evan V.; Chien, Yi-Ju

    2009-03-02

    The Pacific Northwest National Laboratory conducted this study for the Bonneville Power Administration (BPA) with funding provided through the Northwest Power and Conservation Council(a) and the BPA Fish and Wildlife Program. The study was conducted in the Hanford Reach of the Columbia River. The goal of study was to determine the physical habitat factors necessary to define the redd capacity of fall Chinook salmon that spawn in large mainstem rivers like the Hanford Reach and Snake River. The study was originally commissioned in FY 1994 and then recommissioned in FY 2000 through the Fish and Wildlife Program rolling review of the Columbia River Basin projects. The work described in this report covers the period from 1994 through 2004; however, the majority of the information comes from the last four years of the study (2000 through 2004). Results from the work conducted from 1994 to 2000 were covered in an earlier report. More than any other stock of Pacific salmon, fall Chinook salmon (Oncorhynchus tshawytscha) have suffered severe impacts from the hydroelectric development in the Columbia River Basin. Fall Chinook salmon rely heavily on mainstem habitats for all phases of their life cycle, and mainstem hydroelectric dams have inundated or blocked areas that were historically used for spawning and rearing. The natural flow pattern that existed in the historic period has been altered by the dams, which in turn have affected the physical and biological template upon which fall Chinook salmon depend upon for successful reproduction. Operation of the dams to produce power to meet short-term needs in electricity (termed power peaking) produces unnatural fluctuations in flow over a 24-hour cycle. These flow fluctuations alter the physical habitat and disrupt the cues that salmon use to select spawning sites, as well as strand fish in near-shore habitat that becomes dewatered. The quality of spawning gravels has been affected by dam construction, flood protection, and agricultural and industrial development. In some cases, the riverbed is armored such that it is more difficult for spawners to move, while in other cases the intrusion of fine sediment into spawning gravels has reduced water flow to sensitive eggs and young fry. Recovery of fall Chinook salmon populations may involve habitat restoration through such actions as dam removal and reservoir drawdown. In addition, habitat protection will be accomplished through set-asides of existing high-quality habitat. A key component to evaluating these actions is quantifying the salmon spawning habitat potential of a given river reach so that realistic recovery goals for salmon abundance can be developed. Quantifying salmon spawning habitat potential requires an understanding of the spawning behavior of Chinook salmon, as well as an understanding of the physical habitat where these fish spawn. Increasingly, fish biologists are recognizing that assessing the physical habitat of riverine systems where salmon spawn goes beyond measuring microhabitat like water depth, velocity, and substrate size. Geomorphic features of the river measured over a range of spatial scales set up the physical template upon which the microhabitat develops, and successful assessments of spawning habitat potential incorporate these geomorphic features. We had three primary objectives for this study. The first objective was to determine the relationship between physical habitats at different spatial scales and fall Chinook salmon spawning locations. The second objective was to estimate the fall Chinook salmon redd capacity for the Reach. The third objective was to suggest a protocol for determining preferable spawning reaches of fall Chinook salmon. To ensure that we collected physical data within habitat that was representative of the full range of potential spawning habitat, the study area was stratified based on geomorphic features of the river using a two-dimensional river channel index that classified the river cross section into one of four shapes based on channel symmetry, depth, and width. We found t

  16. What can we learn from neutrinoless double beta decay experiments?

    E-Print Network [OSTI]

    Bahcall, John N.

    2009-01-01

    Limits From Neutrinoless Double-Beta Decay (Rev. ),” ina next generation neutrinoless double beta decay search andPARTICLES? NO NEUTRINOLESS DOUBLE BETA DECAY AND INVERTED

  17. A Search for Neutrinoless Double Beta Decay of Te-130

    E-Print Network [OSTI]

    Bryant, Adam Douglas

    2010-01-01

    far unobserved, neutrinoless double beta decay is a possibleright for the neutrinoless double beta decay of 130 Te. Thisprocess, with neutrinoless double beta decay being the most

  18. Stream-reach Identification for New Run-of-River Hydropower Development through a Merit Matrix Based Geospatial Algorithm

    SciTech Connect (OSTI)

    Pasha, M. Fayzul K. [California State University, Fresno; Yeasmin, Dilruba [ORNL; Kao, Shih-Chieh [ORNL; Hadjerioua, Boualem [ORNL; Wei, Yaxing [ORNL; Smith, Brennan T [ORNL

    2014-01-01

    Even after a century of development, the total hydropower potential from undeveloped rivers is still considered to be abundant in the United States. However, unlike evaluating hydropower potential at existing hydropower plants or non-powered dams, locating a feasible new hydropower plant involves many unknowns, and hence the total undeveloped potential is harder to quantify. In light of the rapid development of multiple national geospatial datasets for topography, hydrology, and environmental characteristics, a merit matrix based geospatial algorithm is proposed to help identify possible hydropower stream-reaches for future development. These hydropower stream-reaches sections of natural streams with suitable head, flow, and slope for possible future development are identified and compared using three different scenarios. A case study was conducted in the Alabama-Coosa-Tallapoosa (ACT) and Apalachicola-Chattahoochee-Flint (ACF) hydrologic subregions. It was found that a merit matrix based algorithm, which is based on the product of hydraulic head, annual mean flow, and average channel slope, can help effectively identify stream-reaches with high power density and small surface inundation. The identified stream-reaches can then be efficiently evaluated for their potential environmental impact, land development cost, and other competing water usage in detailed feasibility studies . Given that the selected datasets are available nationally (at least within the conterminous US), the proposed methodology will have wide applicability across the country.

  19. Nuclear matrix elements for double beta decay

    E-Print Network [OSTI]

    Vadim Rodin

    2009-10-30

    The present status of calculations of the nuclear matrix elements for neutrinoless double beta decay is reviewed. A proposal which allows in principle to measure the neutrinoless double beta decay Fermi matrix element is briefly described.

  20. Double-{beta} decay Q value of {sup 150}Nd

    SciTech Connect (OSTI)

    Kolhinen, V. S.; Eronen, T.; Gorelov, D.; Hakala, J.; Jokinen, A.; Kankainen, A.; Moore, I. D.; Rissanen, J.; Saastamoinen, A.; Suhonen, J.; Aeystoe, J. [Department of Physics, P. O. Box 35 (YFL), FI-40014 University of Jyvaeskylae (Finland)

    2010-08-15

    The double-{beta} decay Q value of {sup 150}Nd was determined by using the JYFLTRAP Penning trap mass spectrometer. The measured mass difference between {sup 150}Nd and {sup 150}Sm is 3371.38(20) keV. This new value deviates by 3.7 keV from the previously adopted value of 3367.7(22) keV and is a factor of 10 more precise. Accurate knowledge of this Q value is important because {sup 150}Nd is a primary candidate to be used in the search for neutrinoless double-{beta} decay modes in several experiments.

  1. Spin projection with double hybrid density functional theory

    SciTech Connect (OSTI)

    Thompson, Lee M.; Hratchian, Hrant P.

    2014-07-21

    A spin projected double-hybrid density functional theory is presented that accounts for different scaling of opposite and same spin terms in the second order correction. This method is applied to three dissociation reactions which in the unprojected formalism exhibit significant spin contamination with higher spin states. This gives rise to a distorted potential surface and can lead to poor geometries and energies. The projected method presented is shown to improve the description of the potential over unprojected double hybrid density functional theory. Comparison is made with the reference states of the two double hybrid functionals considered here (B2PLYP and mPW2PLYP) in which the projected potential surface is degraded by an imbalance in the description of dynamic and static correlation.

  2. Double parton scattering at high energies

    E-Print Network [OSTI]

    Antoni Szczurek

    2015-04-24

    We discuss a few examples of rich newly developing field of double parton scattering. We start our presentation from production of two pairs of charm quark-antiquark and argue that it is the golden reaction to study the double parton scattering effects. In addition to the DPS we consider briefly also mechanism of single parton scattering and show that it gives much smaller contribution to the $c \\bar c c \\bar c$ final state. Next we discuss a perturbative parton-splitting mechanism which should be included in addition to the conventional DPS mechanism. We show that the presence of this mechanism unavoidably leads to collision energy and other kinematical variables dependence of so-called $\\sigma_{eff}$ parameter being extracted from different experiments. Next we briefly discuss production of four jets. We concentrate on estimation of the contribution of DPS for jets remote in rapidity. Understanding of this contribution is very important in the context of searches for BFKL effects known under the the name Mueller-Navelet jets. We discuss the situation in a more general context. Finally we briefly mention about DPS effects in production of $W^+ W^-$. Outlook closes the presentation.

  3. Overcoming Technical and Market Barriers for Distributed Wind Applications: Reaching the Mainstream; Preprint

    SciTech Connect (OSTI)

    Rhoads-Weaver, H.; Forsyth, T.

    2006-07-01

    This paper describes how the distributed wind industry must overcome hurdles including system costs and interconnection and installation restrictions to reach its mainstream market potential.

  4. Correlations and the neutrinoless double beta decay

    SciTech Connect (OSTI)

    Menendez, J.; Poves, A. [Departamento de Fisica Teorica, and IFT, UAM-CSIC, Universidad Autonoma de Madrid, 28049-Madrid (Spain); Caurier, E.; Nowacki, F. [IPHC, IN2P3-CNRS/Universite Louis Pasteur, 67037-Strasbourg (France)

    2009-11-09

    We explore the influence of the deformation on the nuclear matrix elements of the neutrinoless double beta decay (NME), concluding that the difference in deformation -or more generally on the amount of quadrupole correlations- between parent and grand daughter nuclei quenchs strongly the decay. We discuss how varies the nuclear matrix element of {sup 76}Ge decay when the wave functions of the two nuclei involved in the transition are constrained to reproduce the experimental occupancies. In the Interacting Shell Model description the value of the NME is enhanced about 15% compared to previous calculations, whereas in the QRPA the NME's are reduced by 20%-30%, thus, the discrepancies between both approaches diminish.

  5. Double beta decay and neutrino mass models

    E-Print Network [OSTI]

    Helo, J C; Ota, T; Santos, F A Pereira dos

    2015-01-01

    Neutrinoless double beta decay allows to constrain lepton number violating extensions of the standard model. If neutrinos are Majorana particles, the mass mechanism will always contribute to the decay rate, however, it is not a priori guaranteed to be the dominant contribution in all models. Here, we discuss whether the mass mechanism dominates or not from the theory point of view. We classify all possible (scalar-mediated) short-range contributions to the decay rate according to the loop level, at which the corresponding models will generate Majorana neutrino masses, and discuss the expected relative size of the different contributions to the decay rate in each class. We also work out the phenomenology of one concrete 2-loop model in which both, mass mechanism and short-range diagram, might lead to competitive contributions, in some detail.

  6. Measurement of sin² 2[theta]?? using delayed neutron capture on hydrogen in Double CHOOZ

    E-Print Network [OSTI]

    Terao, Kazuhiro

    2013-01-01

    Double CHOOZ is a reactor antineutrino experiment built to measure [theta]13. The experiment is designed to use two detectors at different baselines (400 m and 1 km) to precisely measure the disappearance of ve from the ...

  7. Inner-shell and double ionization potentials of aminophenol isomers.

    SciTech Connect (OSTI)

    Kryzhevoi, N. V.; Santra, R.; Cederbaum, L. S.

    2011-01-01

    A comprehensive study of single and double core ionization potentials of the aminophenol molecule is reported. The role of relaxation, correlation, relativistic, and basis set effects in these potentials is clarified. Special attention is paid to the isomer dependence of the single and double core ionization potentials. Some of them are also compared with the respective values of the phenol and aniline molecules. It is shown that the core level single ionization potentials of the para-, meta-, and ortho-aminophenol molecules differ only slightly from each other, rendering these structural isomers challenging to distinguish for conventional x-ray photoelectron spectroscopy. In contrast, the energy needed to remove two core electrons from different atoms depends noticeably on the mutual arrangement and even on the relative orientations of the hydroxyl and amine groups. Together with the electrostatic repulsion between the two core holes, relaxation effects accompanying double core ionization play a crucial role here. The pronounced sensitivity of the double ionization potentials, therefore, enables a spectroscopic characterization of the electronic structure of aminophenol isomers by means of x-ray two-photon photoelectron spectroscopy.

  8. The Incremental Reach and Cost Efficiency of Online Video Ads over TV Ads

    E-Print Network [OSTI]

    Cortes, Corinna

    The Incremental Reach and Cost Efficiency of Online Video Ads over TV Ads Yuxue Jin, Sheethal number of brand marketers are including video ads in their advertising campaigns. These advertisers would like to know the incremental reach and cost efficiency of their video and display ads compared

  9. Sensory transformations and the use of multiple reference frames for reach planning

    E-Print Network [OSTI]

    Sabes, Philip

    Sensory transformations and the use of multiple reference frames for reach planning Leah M M McGuire & Philip N Sabes The sensory signals that drive movement planning arrive in a variety of `reference frames the sensory signals available for reach planning were varied. These results challenge the widely held ideas

  10. Author's personal copy Profiling of late Tertiaryearly Quaternary surface in the lower reaches

    E-Print Network [OSTI]

    Rangarajan, Govindan

    Author's personal copy Profiling of late Tertiary­early Quaternary surface in the lower reaches of lower reaches of Narmada valley in a systematic way using the shallow seismic method, that records both horizontal and vertical components of the microtremor (ambient noise) caused by natural processes

  11. Probing New Physics Models of Neutrinoless Double Beta Decay with SuperNEMO

    E-Print Network [OSTI]

    R. Arnold; C. Augier; J. Baker; A. S. Barabash; A. Basharina-Freshville; M. Bongrand; V. Brudanin; A. J. Caffrey; S. Cebrián; A. Chapon; E. Chauveau; Th. Dafni; F. F. Deppisch; J. Diaz; D. Durand; V. Egorov; J. J. Evans; R. Flack; K-I. Fushima; I. García Irastorza; X. Garrido; H. Gómez; B. Guillon; A. Holin; K. Holy; J. J. Horkley; Ph. Hubert; C. Hugon; F. J. Iguaz; N. Ishihara; C. M. Jackson; S. Jullian; M. Kauer; O. Kochetov; S. I. Konovalov; V. Kovalenko; T. Lamhamdi; K. Lang; G. Lutter; G. Luzón; F. Mamedov; Ch. Marquet; F. Mauger; F. Monrabal; A. Nachab; I. Nasteva; I. Nemchenok; C. H. Nguyen; M. Nomachi; F. Nova; H. Ohsumi; R. B. Pahlka; F. Perrot; F. Piquemal; P. P. Povinec; B. Richards; J. S. Ricol; C. L. Riddle; A. Rodríguez; R. Saakyan; X. Sarazin; J. K. Sedgbeer; L. Serra; Yu. Shitov; L. Simard; F. Šimkovic; S. Söldner-Rembold; I. Štekl; C. S. Sutton; Y. Tamagawa; J. Thomas; V. Timkin; V. Tretyak; Vl. I. Tretyak; V. I. Umatov; I. A. Vanyushin; R. Vasiliev; V. Vasiliev; V. Vorobel; D. Waters; N. Yahlali; A. Žukauskas

    2010-11-23

    The possibility to probe new physics scenarios of light Majorana neutrino exchange and right-handed currents at the planned next generation neutrinoless double beta decay experiment SuperNEMO is discussed. Its ability to study different isotopes and track the outgoing electrons provides the means to discriminate different underlying mechanisms for the neutrinoless double beta decay by measuring the decay half-life and the electron angular and energy distributions.

  12. Background Suppression Using Pulse Shape Analysis with a BEGe Detector for Neutrinoless Double Beta Decay Search with GERDA

    SciTech Connect (OSTI)

    Budjas, Dusan; Schoenert, Stefan [Max-Planck-Institut fuer Kernphysik, Saupfercheckweg 1, 69117 Heidelberg (Germany); Chkvorets, Oleg [Max-Planck-Institut fuer Kernphysik, Saupfercheckweg 1, 69117 Heidelberg (Germany); Department of Physics, Laurentian University, Ramsey Lake Road, P3E 2C6 Sudbury, Ontario (Canada)

    2009-12-17

    A pulse shape analysis for distinguishing between double beta decay-like interactions and multiple-scattered photons was performed for the first time using a BEGe-type detector. This discrimination method is included in the research and development for the second phase of the GERDA experiment, since active background suppression techniques are necessary to reach sensitivity for the {sup 76}Ge neutrinoless double beta decay half life of >10{sup 26} years. A suppression of backgrounds in the energy region of interest around the {sup 76}Ge Q{sub {beta}}{sub {beta}} = 2039 keV is demonstrated, with (0.93{+-}0.08)% survival probability for events from {sup 60}Co, (21{+-}3)% for {sup 226}Ra, and (40{+-}2)% for {sup 228}Th. This performance is achieved with (89{+-}1)% acceptance of {sup 228}Th double escape events, which are analogous to double beta decay.

  13. Neutrinoless Double Beta Decay: Present and Future

    E-Print Network [OSTI]

    Oliviero Cremonesi

    2002-10-04

    Present status, and future plans for Double Beta Decay searches are reviewed. Given the recent observations of neutrino oscillations, a possibility to observe $\\beta\\beta(0\

  14. Review of double beta decay experiments

    E-Print Network [OSTI]

    A. S. Barabash

    2014-03-12

    The brief review of current experiments on search and studying of double beta decay processes is done. Best present limits on $\\langle m_{\

  15. Double perovskite catalysts for oxidative coupling

    DOE Patents [OSTI]

    Campbell, Kenneth D. (Charleston, WV)

    1991-01-01

    Alkali metal doped double perovskites containing manganese and at least one of cobalt, iron and nickel are useful in the oxidative coupling of alkane to higher hydrocarbons.

  16. Specific heats of quantum double-well systems

    E-Print Network [OSTI]

    Hideo Hasegawa

    2012-11-26

    Specific heats of quantum systems with symmetric and asymmetric double-well potentials have been calculated. In numerical calculations of their specific heats, we have adopted the combined method which takes into account not only eigenvalues of $\\epsilon_n$ for $0 \\leq n \\leq N_m$ obtained by the energy-matrix diagonalization but also their extrapolated ones for $N_m+1 \\leq n specific heats are shown to be rather different from counterparts of a harmonic oscillator. In particular, specific heats of symmetric double-well systems at very low temperatures have the Schottky-type anomaly, which is rooted to a small energy gap in low-lying two-level eigenstates induced by a tunneling through the potential barrier. The Schottky-type anomaly is removed when an asymmetry is introduced into the double-well potential. It has been pointed out that the specific-heat calculation of a double-well system reported by Feranchuk, Ulyanenkov and Kuz'min [Chem. Phys. 157, 61 (1991)] is misleading because the zeroth-order operator method they adopted neglects crucially important off-diagonal contributions.

  17. Neutrinoless double beta decay studied with configuration mixing methods

    E-Print Network [OSTI]

    Tomas R. Rodriguez; Gabriel Martinez-Pinedo

    2010-12-08

    We study neutrinoless double beta decay of several isotopes with state-of-the-art beyond self-consistent mean field methods to compute the nuclear matrix elements (NME). Generating coordinate method with particle number and angular momentum projection (GCM+PNAMP) is used for finding mother and granddaughter states and evaluating transition operators between different nuclei. We analyze explicitly the role of the deformation, pairing and configuration mixing in the evaluation of the NME.

  18. Recent advances in neutrinoless double beta decay search

    E-Print Network [OSTI]

    Lino Miramonti; Franco Reseghetti

    2004-11-09

    Even after the discovery of neutrino flavour oscillations, based on data from atmospheric, solar, reactor, and accelerator experiments, many characteristics of the neutrino remain unknown. Only the neutrino square-mass differences and the mixing angle values have been estimated, while the value of each mass eigenstate still hasn't. Its nature (massive Majorana or Dirac particle) is still escaping. Neutrinoless double beta decay ($0\

  19. Steering of a Bosonic Mode with a Double Quantum Dot

    E-Print Network [OSTI]

    T. Brandes; N. Lambert

    2003-02-13

    We investigate the transport and coherence properties of a double quantum dot coupled to a single damped boson mode. Our numerically results reveal how the properties of the boson distribution can be steered by altering parameters of the electronic system such as the energy difference between the dots. Quadrature amplitude variances and the Wigner function are employed to illustrate how the state of the boson mode can be controlled by a stationary electron current through the dots.

  20. DOE CHALLENGE HOME and PHIUS PARTNER TO MAKE IT EASIER TO REACH

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

    CHALLENGE HOME and PHIUS PARTNER TO MAKE IT EASIER TO REACH NEW LEVELS OF ZERO NET-ENERGY READY This partnership between DOE and PHIUS enhances coordination between voluntary peak...

  1. The role (relationship) of visual and motor imagery in estimating reach 

    E-Print Network [OSTI]

    Ammar, Diala Fouad

    2007-09-17

    The primary intent of this study was to explore fundamental questions about the role and relationship between motor (MI) and visual (VI) imagery within the context of estimating reach. Experiment 1 examined and compared ...

  2. Oil Shale Market is Estimated to Reach USD 7,400.70 Million by...

    Open Energy Info (EERE)

    Oil Shale Market is Estimated to Reach USD 7,400.70 Million by 2022 Home > Groups > Renewable Energy RFPs Wayne31jan's picture Submitted by Wayne31jan(150) Contributor 1 July, 2015...

  3. Low-Interest Rates Entice Philadelphians to Reach for the Stars...

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

    the Stars Low-Interest Rates Entice Philadelphians to Reach for the Stars For many Philadelphia area residents, getting a loan for home energy efficiency improvements is a no...

  4. Mechanisms of responsibility assignment during redundant reaching1 Alexandra Reichenbach1

    E-Print Network [OSTI]

    Diedrichsen, Jörn

    for a simplified kinematics and dynamic45 analysis (Bhushan and Shadmehr 1999). In natural, free movements, most1 Mechanisms of responsibility assignment during redundant reaching1 movements2 3 4 Alexandra

  5. Artificial Lift Systems Market is expected to reach USD 19,806...

    Open Energy Info (EERE)

    Artificial Lift Systems Market is expected to reach USD 19,806.8 Million by 2020 Home > Groups > Renewable Energy RFPs Wayne31jan's picture Submitted by Wayne31jan(150) Contributor...

  6. Oil Spill Management Market is Estimated to Reach USD 114,441...

    Open Energy Info (EERE)

    Oil Spill Management Market is Estimated to Reach USD 114,441.1 Million by 2020 Home > Groups > Renewable Energy RFPs Wayne31jan's picture Submitted by Wayne31jan(150) Contributor...

  7. Predicting neutrinoless double beta decay

    SciTech Connect (OSTI)

    Hirsch, M.; Villanova del Moral, A.; Valle, J.W.F. [AHEP Group, Instituto de Fisica Corpuscular - C.S.I.C./Universitat de Valencia, Edificio Institutos de Paterna, Apt 22085, E-46071 Valencia (Spain); Ma, Ernest [Physics Department, University of California, Riverside, California 92521 (United States); Institute for Particle Physics Phenomenology, University of Durham, Durham, DH1 3LE (United Kingdom)

    2005-11-01

    We give predictions for the neutrinoless double beta decay rate in a simple variant of the A{sub 4} family symmetry model. We show that there is a lower bound for the {beta}{beta}{sub 0{nu}} amplitude even in the case of normal hierarchical neutrino masses, corresponding to an effective mass parameter vertical bar m{sub ee} vertical bar {>=}0.17{radical}({delta}m{sub ATM}{sup 2}). This result holds both for the CP conserving and CP violating cases. In the latter case we show explicitly that the lower bound on vertical bar m{sub ee} vertical bar is sensitive to the value of the Majorana phase. We conclude therefore that in our scheme, {beta}{beta}{sub 0{nu}} may be accessible to the next generation of high sensitivity experiments.

  8. Double-Disk Dark Matter

    E-Print Network [OSTI]

    Fan, JiJi; Randall, Lisa; Reece, Matthew

    2013-01-01

    Based on observational tests and constraints on halo structure, dark matter is generally taken to be cold and essentially collisionless. On the other hand, given the large number of particles and forces in the visible world, a more complex dark sector could be a reasonable or even likely possibility. This hypothesis leads to testable consequences, perhaps portending the discovery of a rich hidden world neighboring our own. We consider a scenario that readily satisfies current bounds that we call Partially Interacting Dark Matter (PIDM). This scenario contains self-interacting dark matter, but it is not the dominant component. Even if PIDM contains only a fraction of the net dark matter density, comparable to the baryonic fraction, the subdominant component's interactions can lead to interesting and potentially observable consequences. Our primary focus will be the special case of Double-Disk Dark Matter (DDDM), in which self-interactions allow the dark matter to lose enough energy to lead to dynamics similar ...

  9. The tropical double description method

    E-Print Network [OSTI]

    Allamigeon, Xavier; Goubault, Eric

    2010-01-01

    We develop a tropical analogue of the classical double description method allowing one to compute an internal representation (in terms of vertices) of a polyhedron defined externally (by inequalities). The heart of the tropical algorithm is a characterization of the extreme points of a polyhedron in terms of a system of constraints which define it. We show that checking the extremality of a point reduces to checking whether there is only one minimal strongly connected component in an hypergraph. The latter problem can be solved in almost linear time, which allows us to eliminate quickly redundant generators. We report extensive tests (including benchmarks from an application to static analysis) showing that the method outperforms experimentally the previous ones by orders of magnitude. The present tools also lead to worst case bounds which improve the ones provided by previous methods.

  10. Double Integrals: GENERAL REGION The main difficulty in evaluating a double integral

    E-Print Network [OSTI]

    Knopf, Dan

    Double Integrals: GENERAL REGION The main difficulty in evaluating a double integral was being able to compute the single variable integrals that arose because the double integral could written as repeated single variable integrals and either choice of order of integration used. So we could always choose

  11. Double beta decay: experiments and theory review

    E-Print Network [OSTI]

    A. Nucciotti

    2007-07-28

    Neutrinoless double beta decay is one of the most powerful tools to set the neutrino mass absolute scale and establish whether the neutrino is a Majorana particle. After a summary of the neutrinoless double beta decay phenomenology, the present status of the experimental search for this rare decay is reported and the prospects for next generation experiments are reviewed.

  12. Neutrinoless double beta decay and neutrino physics

    E-Print Network [OSTI]

    Werner Rodejohann

    2012-08-20

    The connection of neutrino physics with neutrinoless double beta decay is reviewed. After presenting the current status of the PMNS matrix and the theoretical background of neutrino mass and lepton mixing, we will summarize the various implications of neutrino physics for double beta decay. The influence of light sterile neutrinos and other exotic modifications of the three neutrino picture is also discussed.

  13. Neutrinoless Double Beta Decay in Light of SNO Salt Data

    E-Print Network [OSTI]

    Murayama, Hitoshi

    2009-01-01

    Limits From Neutrinoless Double-Beta Decay (Rev. ),” incan also cause neutrinoless double-beta decay (see e.g. , [LBNL-53996 Neutrinoless Double Beta Decay in Light of SNO

  14. Neutrinoless Double Beta Decay in Heavy Deformed Nuclei

    E-Print Network [OSTI]

    Jorge G. Hirsch; O. Castaños; P. O. Hess

    1994-07-12

    The zero neutrino mode of the double beta decay in heavy deformed nuclei is investigated in the framework of the pseudo SU(3) model, which has provided an accurate description of collective nuclear structure and predicted half-lives for the two neutrino mode in good agreement with experiments. In the case of $^{238}U$ the calculated zero neutrino half-life is at least three orders of magnitude greater than the two neutrino one, giving strong support of the identification of the radiochemically determined half-life as being the two neutrino double beta decay. For $^{150}Nd$ the zero neutrino matrix elements are of the order of magnitude of, but lesser than, those evaluated using the QRPA. This result confirms that different nuclear models produce similar zero neutrino matrix elements, contrary to the two neutrino case. Using these pseudo SU(3) results and the upper limit for the neutrino mass we estimate the $\\beta\\beta_{0\

  15. Results of the double beta decay experiment NEMO-3

    SciTech Connect (OSTI)

    Tretyak, V. I. [Joint Institute for Nuclear Research, 6 Joliot Curie, Dubna (Russian Federation); Collaboration: NEMO-3 Collaboration

    2013-12-30

    The double beta decay experiment NEMO-3 has taken data from February 2003 to January 2011. The two-neutrino decay half lives were measured for seven different isotopes ({sup 100}Mo, {sup 82}Se, {sup 116}Cd, {sup 150}Nd, {sup 96}Zr, {sup 48}Ca and {sup 130}Te). No evidence for neutrinoless double beta decay is observed. The 0??? half-life limits are found to be T{sub 1/2}{sup 0?}({sup 100}Mo)>1.0×10{sup 24}yr(90%C.L.) and T{sub 1/2}{sup 0?}({sup 82}Se)>3.2×10{sup 23}yr(90%C.L.)

  16. Entanglement dynamics for the double Tavis-Cummings model

    E-Print Network [OSTI]

    Zhong-Xiao Man; Yun-Jie Xia; Nguyen Ba An

    2009-02-14

    A double Tavis-Cummings model (DTCM) is developed to simulate the entanglement dynamics of realistic quantum information processing where two entangled atom-pairs $AB$ and $CD$ are distributed in such a way that atoms $AC$ are embedded in a cavity $a$ while $BD$ are located in another remote cavity $b$. The evolutions of different types of initially shared entanglement of atoms are studied under various initial states of cavity fields. The results obtained in the DTCM are compared with that obtained in the double Jaynes-Cummings model (DJCM) [J. Phys. B \\textbf{40}, S45 (2007)] and an interaction strength theory is proposed to explain the parameter domain in which the so-called entanglement sudden death occurs for both the DTCM and DJCM.

  17. Double Wick rotating Green-Schwarz strings

    E-Print Network [OSTI]

    Gleb Arutyunov; Stijn J. van Tongeren

    2015-05-05

    Via an appropriate field redefinition of the fermions, we find a set of conditions under which light cone gauge fixed world sheet theories of strings on two different backgrounds are related by a double Wick rotation. These conditions take the form of a set of transformation laws for the background fields, complementing a set of transformation laws for the metric and B field we found previously with a set for the dilaton and RR fields, and are compatible with the supergravity equations of motion. Our results prove that at least to second order in fermions, the AdS_5 x S^5 mirror model which plays an important role in the field of integrability in AdS/CFT, represents a string on `mirror AdS_5 x S^5', the background that follows from our transformations. We discuss analogous solutions for AdS_3 x S^3 x T^4 and AdS_2 x S^2 x T^6. The main ingredient in our derivation is the light cone gauge fixed action for a string on an (almost) completely generic background, which we explicitly derive to second order in fermions.

  18. Resonance and Double Negative Behavior in Metamaterials

    E-Print Network [OSTI]

    Yue Chen; Robert P. Lipton

    2013-05-03

    A generic class of metamaterials is introduced and is shown to exhibit frequency dependent double negative effective properties. We develop a rigorous method for calculating the frequency intervals where either double negative or double positive effective properties appear and show how these intervals imply the existence of propagating Bloch waves inside sub-wavelength structures. The branches of the dispersion relation associated with Bloch modes are shown to be explicitly determined by the Dirichlet spectrum of the high dielectric phase and the generalized electrostatic spectra of the complement.

  19. Neutrinoless Double Beta Decay and Neutrino Masses

    E-Print Network [OSTI]

    Michael Duerr

    2012-06-04

    Neutrinoless double beta decay is a promising test for lepton number violating physics beyond the standard model of particle physics. There is a deep connection between this decay and the phenomenon of neutrino masses. In particular, we will discuss the relation between neutrinoless double beta decay and Majorana neutrino masses provided by the so-called Schechter--Valle theorem in a quantitative way. Furthermore, we will present an experimental cross check to discriminate neutrinoless double beta decay from unknown nuclear background using only one isotope, i.e., within one experiment.

  20. Development of double-decker pulse radiolysis

    SciTech Connect (OSTI)

    Kan, K.; Kondoh, T.; Yang, J.; Ogata, A.; Norizawa, K.; Yoshida, Y. [Institute of Scientific and Industrial Research, Osaka University, Osaka (Japan)

    2012-07-15

    Double-decker pulse radiolysis (DDPR), which utilizes double-decker electron beams, was investigated to develop a new pulse radiolysis with a high time resolution. The double-decker electron beams were generated by injecting two UV pulses into a photocathode radio-frequency gun. In the pulse radiolysis, one electron beam was used as a pump beam, and the other was converted to a probe pulse. Finally, as its first application, the DDPR was successfully used for observing solvated electrons in water, with a 10%-90% rise time of 8.6 ps.

  1. Double-reed exhaust valve engine

    DOE Patents [OSTI]

    Bennett, Charles L.

    2015-06-30

    An engine based on a reciprocating piston engine that extracts work from pressurized working fluid. The engine includes a double reed outlet valve for controlling the flow of low-pressure working fluid out of the engine. The double reed provides a stronger force resisting closure of the outlet valve than the force tending to open the outlet valve. The double reed valve enables engine operation at relatively higher torque and lower efficiency at low speed, with lower torque, but higher efficiency at high speed.

  2. Search for: "neutrinoless double beta decay" | DOE PAGES

    Office of Scientific and Technical Information (OSTI)

    neutrinoless double beta decay" Find + Advanced Search Advanced Search All Fields: "neutrinoless double beta decay" Title: Full Text: Bibliographic Data: Creator Author: Name...

  3. SciTech Connect: "neutrinoless double beta decay"

    Office of Scientific and Technical Information (OSTI)

    neutrinoless double beta decay" Find + Advanced Search Term Search Semantic Search Advanced Search All Fields: "neutrinoless double beta decay" Semantic Semantic Term Title:...

  4. Double-Disk Dark Matter

    E-Print Network [OSTI]

    JiJi Fan; Andrey Katz; Lisa Randall; Matthew Reece

    2013-07-31

    Based on observational constraints on large scale structure and halo structure, dark matter is generally taken to be cold and essentially collisionless. On the other hand, given the large number of particles and forces in the visible world, a more complex dark sector could be a reasonable or even likely possibility. This hypothesis leads to testable consequences, perhaps portending the discovery of a rich hidden world neighboring our own. We consider a scenario that readily satisfies current bounds that we call Partially Interacting Dark Matter (PIDM). This scenario contains self-interacting dark matter, but it is not the dominant component. Even if PIDM contains only a fraction of the net dark matter density, comparable to the baryonic fraction, the subdominant component's interactions can lead to interesting and potentially observable consequences. Our primary focus will be the special case of Double-Disk Dark Matter (DDDM), in which self-interactions allow the dark matter to lose enough energy to lead to dynamics similar to those in the baryonic sector. We explore a simple model in which DDDM can cool efficiently and form a disk within galaxies, and we evaluate some of the possible observational signatures. The most prominent signal of such a scenario could be an enhanced indirect detection signature with a distinctive spatial distribution. Even though subdominant, the enhanced density at the center of the galaxy and possibly throughout the plane of the galaxy can lead to large boost factors, and could even explain a signature as large as the 130 GeV Fermi line. Such scenarios also predict additional dark radiation degrees of freedom that could soon be detectable and would influence the interpretation of future data, such as that from Planck and from the Gaia satellite. We consider this to be the first step toward exploring a rich array of new possibilities for dark matter dynamics.

  5. Double layer capacitors : automotive applications and modeling

    E-Print Network [OSTI]

    New, David Allen, 1976-

    2004-01-01

    This thesis documents the work on the modeling of double layer capacitors (DLCs) and the validation of the modeling procedure. Several experiments were conducted to subject the device under test to a variety of ...

  6. Double logarithmic asymptotic behavior in quantum chromodynamics

    SciTech Connect (OSTI)

    Kirschner, R.

    1981-08-01

    The double logarithmic contributions to the quark-(anti)quark scattering and annihilation amplitudes are summed to all orders in quantum chromodynamics. The results are a generalization of the calculations of Gorshkov et al. in the case of quantum electrodynamics.

  7. Double bevel construction of a diamond anvil

    DOE Patents [OSTI]

    Moss, W.C.

    1987-02-06

    Use of double or multiple bevel culet geometry on a diamond anvil to provide increased sample pressure and stability for a given force applied to the diamond tables. 7 figs.

  8. CP Violation in Neutrinoless Double Beta Decay

    E-Print Network [OSTI]

    T. Fukuyama; K. Matsuda; H. Nishiura

    1997-08-19

    We argue three-flavour neutrino mixing. We consider the neutrinos as Majorana particles and see how the neutrinoless double beta decay constrains the neutrino mixing angles. Our formulation is widely valid and is applied to the neutrino oscillation experiment.

  9. Phenomenology of neutrinoless double beta decay

    E-Print Network [OSTI]

    Gómez-Cadenas, J J

    2015-01-01

    This paper reviews the current status and future outlook of neutrinoless double beta decay searches, which try to provide an answer to the fundamental question of whether neutrinos are Dirac or Majorana particles.

  10. Probing neutrinoless double beta decay with SNO+

    E-Print Network [OSTI]

    Evelina Arushanova; Ashley R. Back

    2015-05-01

    Probing neutrinoless double beta decay is one of the primary goals for SNO+, SNOLAB's multi-purpose neutrino detector. In order to achieve this goal the SNO detector has been adapted so that it can be filled with Te-loaded liquid scintillator. During the initial double beta phase the target loading is 0.3% natural Te, which equates to $\\sim790$ kg of double beta isotope. Estimating the sensitivity to neutrinoless double beta decay requires a well understood background model. For SNO+ this is provided by a comprehensive study considering all possible background contributions, whether they originate from within the liquid scintillator cocktail, the surrounding parts of the detector or other irreducible backgrounds. Given these considerations, for five years running in the initial phase, the expected sensitivity is $T_{1/2}^{0\

  11. Phenomenology of neutrinoless double beta decay

    E-Print Network [OSTI]

    J. J. Gómez-Cadenas; Justo Martín-Albo

    2015-02-25

    This paper reviews the current status and future outlook of neutrinoless double beta decay searches, which try to provide an answer to the fundamental question of whether neutrinos are Dirac or Majorana particles.

  12. Probing neutrinoless double beta decay with SNO+

    E-Print Network [OSTI]

    Arushanova, Evelina

    2015-01-01

    Probing neutrinoless double beta decay is one of the primary goals for SNO+, SNOLAB's multi-purpose neutrino detector. In order to achieve this goal the SNO detector has been adapted so that it can be filled with Te-loaded liquid scintillator. During the initial double beta phase the target loading is 0.3% natural Te, which equates to $\\sim790$ kg of double beta isotope. Estimating the sensitivity to neutrinoless double beta decay requires a well understood background model. For SNO+ this is provided by a comprehensive study considering all possible background contributions, whether they originate from within the liquid scintillator cocktail, the surrounding parts of the detector or other irreducible backgrounds. Given these considerations, for five years running in the initial phase, the expected sensitivity is $T_{1/2}^{0\

  13. Reach Zones Try this experiment: Place one of your arms out in

    E-Print Network [OSTI]

    , doc- ument stand, folders, staplers, books and other resources that you access regularly. The Tertiary, binders and office resources. Workplace Health and Wellness Monthly Issue Includes Cholesterol Reach Zones oil Olive oil contains antioxidants that can lower your "bad" (LDL) cholesterol but leave your "good

  14. Innovative Telemetry System Will Help Tap Hard-to-Reach Natural Gas Resources

    Broader source: Energy.gov [DOE]

    The commercialization of an innovative telemetry communications system developed through a U.S. Department of Energy research program will help U.S. producers tap previously hard-to-reach natural gas resources deep underground, resulting in access to additional supplies that will help enhance national energy security.

  15. For water's sake, Chicago researchers reach across the seas to Israel By Alex Rodriguez

    E-Print Network [OSTI]

    Sibener, Steven

    For water's sake, Chicago researchers reach across the seas to Israel By Alex Rodriguez Chicago by the desert sun. The clusters of farms and wineries in the Arava are a testament to Israel's acumen in water technology. One of the most parched places on Earth has found a way to beat water woes once so severe

  16. AMPHIBIANS AND REPTILES OF THE GREAT FALLS BYPASSED REACHES IN SOUTH CAROLINA

    E-Print Network [OSTI]

    Dorcas, Michael E.

    of the Catawba River situated only slightly north of the juncture of the Piedmont and Upper Coastal Plain of the amphibians and reptiles inhabiting the Great Falls Bypassed Reaches of the Catawba River in South Carolina salamanders, 7 turtles, 6 lizards, and 11 snakes. No species of amphibian or reptile considered rare

  17. Learned Dynamics of Reaching Movements Generalize From Dominant to Non-dominant Arm

    E-Print Network [OSTI]

    Donchin, Opher

    Learned Dynamics of Reaching Movements Generalize From Dominant to Non- dominant Arm Sarah E generalization from training at one arm position to another position. The generalization patterns suggested system. Here, we test the sensitivity of these elements to the other arm by quantifying inter-arm

  18. Reaching Out to See: Arm Position Can Attenuate Human Visual Loss

    E-Print Network [OSTI]

    Robertson, Lynn

    Reaching Out to See: Arm Position Can Attenuate Human Visual Loss Krista Schendel and Lynn C on or near the hands, arms, and face. These cells have now been found in frontal, parietal, and subcortical processing of visual stimuli placed near the hands and arms, we hypothesized that arm position may be capable

  19. Learned Dynamics of Reaching Movements Generalize From Dominant to Nondominant Arm

    E-Print Network [OSTI]

    Shadmehr, Reza

    Learned Dynamics of Reaching Movements Generalize From Dominant to Nondominant Arm SARAH E dominant to nondominant arm. J Neuro- physiol 89: 168­176, 2003. First published October 10, 2002; 10 generalization from training at one arm position to another position. The generalization patterns suggested

  20. On the Relationship Between Joint Angular Velocity and Motor Cortical Discharge During Reaching

    E-Print Network [OSTI]

    Moran, Daniel

    On the Relationship Between Joint Angular Velocity and Motor Cortical Discharge During Reaching G, and Andrew B. Schwartz. On the relationship between joint angular velocity and motor cortical discharge angular velocities. Hand velocity is considered a parameter of extrinsic space because it is measured

  1. An EUV Fresnel zoneplate mask-imaging microscope for lithography generations reaching 8 nm

    E-Print Network [OSTI]

    An EUV Fresnel zoneplate mask-imaging microscope for lithography generations reaching 8 nm Kenneth lithography design rules. The proposed microscope features an array of user-selectable Fresnel zoneplate-EUV, Fresnel zoneplate microscope, the AIT has been in the vanguard of high-resolution EUV mask imaging

  2. Interannual variation of reach specific migratory success for Sacramento River hatchery yearling late-fall run

    E-Print Network [OSTI]

    Klimley, A. Peter

    a multitude of habitats ­ the more natural run-riffle-pool structure of the upper river, a channelized lowerInterannual variation of reach specific migratory success for Sacramento River hatchery yearling late-fall run Chinook salmon (Oncorhynchus tshawytscha) and steelhead trout (Oncorhynchus mykiss

  3. Identifying eroding and depositional reaches of valley by analysis of suspended sediment transport

    E-Print Network [OSTI]

    Singer, Michael

    Identifying eroding and depositional reaches of valley by analysis of suspended sediment transport in the Sacramento River, California Michael Bliss Singer and Thomas Dunne Donald Bren School of Environmental Science and Management, University of California Santa Barbara, California, USA Abstract. Spatial patterns

  4. Ag land preservation has reached maturity. Just over 30 years ago,

    E-Print Network [OSTI]

    Handy, Susan L.

    cite the importance of preserving farmland as a long-term source of food, ill many metropolitanAg land preservation has reached maturity. #12;Just over 30 years ago, the first public purchase, on the eastern end of Long Island. Since then more than 8,000 acres of the county's farmland have been preserved

  5. Double shell tank waste analysis plan

    SciTech Connect (OSTI)

    Mulkey, C.H.; Jones, J.M.

    1994-12-15

    Waste analysis plan for the double shell tanks. SD-WM-EV-053 is Superseding SD-WM-EV-057.This document provides the plan for obtaining information needed for the safe waste handling and storage of waste in the Double Shell Tank Systems. In Particular it addresses analysis necessary to manage waste according to Washington Administrative Code 173-303 and Title 40, parts 264 and 265 of the Code of Federal Regulations.

  6. Neutrinoless double beta decay with scalar bilinears

    E-Print Network [OSTI]

    H. V. Klapdor-Kleingrothaus; U. Sarkar

    2002-11-18

    One possible probe to physics beyond the standard model is to look for scalar bilinears, which couple to two fermions of the standard model. We point out that the scalar bilinears allow new diagrams contributing to the neutrinoless double beta decay. The upper bound on the neutrinoless double beta decay lifetime would then give new constraints on the ratio of the masses of these scalars to their couplings to the fermions.

  7. Neutrinoless Double Beta Decay and CP Violation

    E-Print Network [OSTI]

    Patrick J. O'Donnell; Utpal Sarkar

    1993-05-27

    We study the relation between the Majorana neutrino mass matrices and the neutrinoless double beta decay when CP is not conserved. We give an explicit form of the decay rate in terms of a rephasing invariant quantity and demonstrate that in the presence of CP violation it is impossible to have vanishing neutrinoless double beta decay in the case of two neutrino generations (or when the third generation leptons do not mix with other leptons and hence decouple).

  8. Wavelength-doubling optical parametric oscillator

    DOE Patents [OSTI]

    Armstrong, Darrell J. (Albuquerque, NM); Smith, Arlee V. (Albuquerque, NM)

    2007-07-24

    A wavelength-doubling optical parametric oscillator (OPO) comprising a type II nonlinear optical medium for generating a pair of degenerate waves at twice a pump wavelength and a plurality of mirrors for rotating the polarization of one wave by 90 degrees to produce a wavelength-doubled beam with an increased output energy by coupling both of the degenerate waves out of the OPO cavity through the same output coupler following polarization rotation of one of the degenerate waves.

  9. Status and Distribution of Fishes in Tributaries of the Garrison Reach of the Missouri River, North Dakota

    E-Print Network [OSTI]

    Status and Distribution of Fishes in Tributaries of the Garrison Reach of the Missouri River, North in Tributaries of the Garrison Reach of the Missouri River, North Dakota Mc Lain S. Johnson December 2010 River of the Missouri River, known as the Garrison Reach, has several tributaries that may provide important riverine

  10. Exact nonlinear excitations in double-degenerate plasmas

    SciTech Connect (OSTI)

    Akbari-Moghanjoughi, M.

    2012-06-15

    In this work, we use the conventional hydrodynamics formalism and incorporate the Chew-Goldberger-Low double-adiabatic theory to evaluate the nonlinear electrostatic ion excitations in double-degenerate (electron spin-orbit degenerate) magnetized quantum plasmas. Based on the Sagdeev pseudopotential method, an exact general pseudopotential is calculated which leads to the allowed Mach-number range criteria for such localized density structures in an anisotropic magnetized plasma. We employ the criteria on the Mach-number range for diverse magnetized quantum plasma with different equations of state. It is remarked that various plasma fractional parameters such as the system dimensionality, ion-temperature, relativistic-degeneracy, Zeeman-energy, and plasma composition are involved in the stability of an obliquely propagating nonlinear ion-acoustic wave in a double-degenerate quantum plasma. Current study is most appropriate for nonlinear wave analysis in dense astrophysical magnetized plasma environments such as white-dwarfs and neutron-star crusts where the strong magnetic fields can be present.

  11. Ortho-positronium observation in the Double Chooz Experiment

    E-Print Network [OSTI]

    Y. Abe; J. C. dos Anjos; J. C. Barriere; E. Baussan; I. Bekman; M. Bergevin; T. J. C. Bezerra; L. Bezrukov; E. Blucher; C. Buck; J. Busenitz; A. Cabrera; E. Caden; L. Camilleri; R. Carr; M. Cerrada; P. -J. Chang; E. Chauveau; P. Chimenti; A. P. Collin; E. Conover; J. M. Conrad; J. I. Crespo-Anadon; K. Crum; A. S. Cucoanes; E. Damon; J. V. Dawson; J. Dhooghe; D. Dietrich; Z. Djurcic; M. Dracos; M. Elnimr; A. Etenko; M. Fallot; F. von Feilitzsch; J. Felde; S. M. Fernandes; V. Fischer; D. Franco; M. Franke; H. Furuta; I. Gil-Botella; L. Giot; M. Goger-Neff; L. F. G. Gonzalez; L. Goodenough; M. C. Goodman; C. Grant; N. Haag; T. Hara; J. Haser; M. Hofmann; G. A. Horton-Smith; A. Hourlier; M. Ishitsuka; J. Jochum; C. Jollet; F. Kaether; L. N. Kalousis; Y. Kamyshkov; D. M. Kaplan; T. Kawasaki; E. Kemp; H. de Kerret; D. Kryn; M. Kuze; T. Lachenmaier; C. E. Lane; T. Lasserre; A. Letourneau; D. Lhuillier; H. P. Lima Jr; M. Lindner; J. M. Lopez-Castano; J. M. LoSecco; B. Lubsandorzhiev; S. Lucht; J. Maeda; C. Mariani; J. Maricic; J. Martino; T. Matsubara; G. Mention; A. Meregaglia; T. Miletic; R. Milincic; A. Minotti; Y. Nagasaka; Y. Nikitenko; P. Novella; L. Oberauer; M. Obolensky; A. Onillon; A. Osborn; C. Palomares; I. M. Pepe; S. Perasso; P. Pfahler; A. Porta; G. Pronost; J. Reichenbacher; B. Reinhold; M. Rohling; R. Roncin; S. Roth; B. Rybolt; Y. Sakamoto; R. Santorelli; A. C. Schilithz; S. Schonert; S. Schoppmann; M. H. Shaevitz; R. Sharankova; S. Shimojima; D. Shrestha; V. Sibille; V. Sinev; M. Skorokhvatov; E. Smith; J. Spitz; A. Stahl; I. Stancu; L. F. F. Stokes; M. Strait; A. Stuken; F. Suekane; S. Sukhotin; T. Sumiyoshi; Y. Sun; R. Svoboda; K. Terao; A. Tonazzo; H. H. Trinh Thi; G. Valdiviesso; N. Vassilopoulos; C. Veyssiere; M. Vivier; S. Wagner; N. Walsh; H. Watanabe; C. Wiebusch; L. Winslow; M. Wurm; G. Yang; F. Yermia; V. Zimmer

    2014-10-07

    The Double Chooz experiment measures the neutrino mixing angle $\\theta_{13}$ by detecting reactor $\\bar{\

  12. Search for neutrinoless double-beta decay of Ge-76 with GERDA

    E-Print Network [OSTI]

    Karl-Tasso Knoepfle

    2008-10-17

    GERDA, the GERmanium Detector Array experiment, is a new double beta-decay experiment which is currently under construction in the INFN National Gran Sasso Laboratory (LNGS), Italy. It is implementing a new shielding concept by operating bare Ge diodes - enriched in Ge-76 - in high purity liquid argon supplemented by a water shield. The aim of GERDA is to verify or refute the recent claim of discovery, and, in a second phase, to achieve a two orders of magnitude lower background index than recent experiments. The paper discusses motivation, physics reach, design and status of construction of GERDA, and presents some R&D results.

  13. Structure and charging kinetics of electrical double layers at large electrode voltage

    SciTech Connect (OSTI)

    Cagle, Clint [Clemson University; Feng, Guang [Clemson University; Qiao, Rui [Clemson University; Huang, Jingsong [ORNL; Sumpter, Bobby G [ORNL; Meunier, Vincent [ORNL

    2009-01-01

    The structure and charging kinetics of electrical double layers (EDLs) at interfaces of NaCl solutions and planar electrodes are studied by molecular dynamics (MD) and Poisson Nernst Planck (PNP) simulations. Based on the MD results and prior experimental data, we show that counterion packing in planar EDLs does not reach the steric limit at electrode voltages below 1 V. In addition, we demonstrate that a PNP model, when complemented with a Stern model, can be effectively used to capture the overall charging kinetics. However, the PNP/Stern model can only give a qualitative description of the fine features of the EDL.

  14. Status and prospects of searches for neutrinoless double beta decay

    E-Print Network [OSTI]

    Bernhard Schwingenheuer

    2012-10-28

    The simultaneous beta decay of two neutrons in a nucleus without the emission of neutrinos (called neutrinoless double beta decay) is a lepton number violating process which is not allowed in the Standard Model of particle physics. More than a dozen experiments using different candidate isotopes and a variety of detection techniques are searching for this decay. Some (EXO-200, Kamland-Zen, GERDA) started to take data recently. EXO and Kamland-Zen have reported first limits of the half life $T_{1/2}^{0\

  15. Trends in radionuclide concentrations in Hanford Reach fish, 1982 through 1992

    SciTech Connect (OSTI)

    Poston, T.M.

    1994-06-01

    Environmental monitoring has been conducted at the US Department of Energy`s Hanford Site in southeast Washington State since 1945. Fish from the Hanford Reach of the Columbia River, which borders the Site, are monitored annually. The two objectives of this report were (1) to evaluate trends in the concentrations of radionuclides [e.g., {sup 90}Sr and {sup 137}Cs] in two species of Columbia River fish [smallmouth bass and mountain whitefish] sampled from the Hanford Reach from 1982 through 1992; and (2) to determine the impact of Hanford Site releases on these two species and carp and fall chinook salmon collected during this time frame. The evaluation found gradual reductions of {sup 137}Cs in bass muscle and {sup 90}Sr in bass and whitefish carcass from 1982 through 1992. Concentrations of {sup 90}Sr in bass and whitefish followed the pattern established by reported Hanford Site releases from 1982 through 1992 and was supported by significant regression analyses comparing annual releases to sample concentration. Because data for carp have been collected only since 1990, the data base was inadequate for determining trends. Moreover, fall chinook salmon were only sampled once in this 11-year period. Concentrations of {sup 90}Sr and {sup 137}Cs in fish samples collected from distant background locations exceeded concentrations in Hanford Reach fish. Estimates of the dose from consumption of Hanford Reach fish were less than 0.001 times the National Council on Radiation Protection and Measurements and the US Department of Energy guideline of 100 mrem/yr.

  16. Evaluation of Juvenile Fall Chinook Stranding on the Hanford Reach, 1997-1999 Interim Report.

    SciTech Connect (OSTI)

    Wagner, Paul; Nugent, John; Price, William

    1999-02-15

    Pilot work conducted in 1997 to aid the development of the study for the 1998 Evaluation of Juvenile Fall Chinook Stranding on The Hanford Reach. The objectives of the 1997 work were to: (1) identify juvenile chinook production and rearing areas..., (2) identify sampling sites and develop the statistical parameters necessary to complete the study, (3) develop a study plan..., (4) conduct field sampling activities...

  17. New Stream-Reach Hydropower Development Fact Sheet | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuelsof EnergyApril 2014Department of EnergyDepartmentPlanned inReach

  18. The excitonic effects in single and double-walled boron nitride nanotubes

    SciTech Connect (OSTI)

    Wang, Shudong; Li, Yunhai; Wang, Jinlan, E-mail: jlwang@seu.edu.cn [Department of Physics and Key Laboratory of MEMS of Ministry of Education, Southeast University, Nanjing 211189 (China); Yip, Joanne [Institute of Textiles and Clothing, Hong Kong Polytechnic University, Kowloon, Hong Kong (China)

    2014-06-28

    The electronic structures and excitonic optical properties of single- and double-walled armchair boron nitride nanotubes (BNNTs) [e.g., (5,5) and (10,10), and (5,5)@(10,10)] are investigated within many-body Green's function and Bethe-Salpeter equation formalism. The first absorption peak of the double-walled nanotube has almost no shift compared with the single-walled (5,5) tube due to the strong optical transition in the double-walled tube that occurs within the inner (5,5) one. Dark and semi-dark excitonic states are detected in the lower energy region, stemming from the charge transfer between inner and outer tubes in the double-walled structure. Most interestingly, the charge transfer makes the electron and the hole reside in different tubes. Moreover, the excited electrons in the double-walled BNNT are able to transfer from the outer tube to the inner one, opposite to that which has been observed in double-walled carbon nanotubes.

  19. Phenomenology of neutrinoless double beta decay

    E-Print Network [OSTI]

    M. Hirsch

    2006-09-15

    Neutrinoless double beta decay violates lepton number by two units, a positive observation therefore necessarily implies physics beyond the standard model. Here, three possible contributions to neutrinoless double beta decay are briefly reviewed: (a) The mass mechanism and its connection to neutrino oscillations; (b) Left-right symmetric models and the lower limit on the right-handed W boson mass; and (c) R-parity violating supersymmetry. In addition, the recently published ``extended black box'' theorem is briefly discussed. Combined with data from oscillation experiments this theorem provides proof that the neutrinoless double beta decay amplitude must receive a non-zero contribution from the mass mechanism, if neutrinos are indeed Majorana particles.

  20. Precision Muon Reconstruction in Double Chooz

    E-Print Network [OSTI]

    Double Chooz collaboration; Y. Abe; J. C. dos Anjos; J. C. Barriere; E. Baussan; I. Bekman; M. Bergevin; T. J. C. Bezerra; L. Bezrukov; E. Blucher; C. Buck; J. Busenitz; A. Cabrera; E. Caden; L. Camilleri; R. Carr; M. Cerrada; P. -J. Chang; E. Chauveau; P. Chimenti; A. P. Collin; E. Conover; J. M. Conrad; J. I. Crespo-Anadón; K. Crum; A. Cucoanes; E. Damon; J. V. Dawson; D. Dietrich; Z. Djurcic; M. Dracos; M. Elnimr; A. Etenko; M. Fallot; F. von Feilitzsch; J. Felde; S. M. Fernandes; V. Fischer; D. Franco; M. Franke; H. Furuta; I. Gil-Botella; L. Giot; M. Göger-Neff; L. F. G. Gonzalez; L. Goodenough; M. C. Goodman; C. Grant; N. Haag; T. Hara; J. Haser; M. Hofmann; G. A. Horton-Smith; A. Hourlier; M. Ishitsuka; J. Jochum; C. Jollet; F. Kaether; L. N. Kalousis; Y. Kamyshkov; D. M. Kaplan; T. Kawasaki; E. Kemp; H. de Kerret; D. Kryn; M. Kuze; T. Lachenmaier; C. E. Lane; T. Lasserre; A. Letourneau; D. Lhuillier; H. P. Lima Jr; M. Lindner; J. M. López-Casta no; J. M. LoSecco; B. Lubsandorzhiev; S. Lucht; J. Maeda; C. Mariani; J. Maricic; J. Martino; T. Matsubara; G. Mention; A. Meregaglia; T. Miletic; R. Milincic; A. Minotti; Y. Nagasaka; Y. Nikitenko; P. Novella; M. Obolensky; L. Oberauer; A. Onillon; A. Osborn; C. Palomares; I. M. Pepe; S. Perasso; P. Pfahler; A. Porta; G. Pronost; J. Reichenbacher; B. Reinhold; M. Röhling; R. Roncin; S. Roth; B. Rybolt; Y. Sakamoto; R. Santorelli; A. C. Schilithz; S. Schönert; S. Schoppmann; M. H. Shaevitz; R. Sharankova; S. Shimojima; V. Sibille; V. Sinev; M. Skorokhvatov; E. Smith; J. Spitz; A. Stahl; I. Stancu; L. F. F. Stokes; M. Strait; A. Stüken; F. Suekane; S. Sukhotin; T. Sumiyoshi; Y. Sun; R. Svoboda; K. Terao; A. Tonazzo; H. H. Trinh Thi; G. Valdiviesso; N. Vassilopoulos; C. Veyssiere; M. Vivier; S. Wagner; H. Watanabe; C. Wiebusch; L. Winslow; M. Wurm; G. Yang; F. Yermia; V. Zimmer

    2014-08-15

    We describe a muon track reconstruction algorithm for the reactor anti-neutrino experiment Double Chooz. The Double Chooz detector consists of two optically isolated volumes of liquid scintillator viewed by PMTs, and an Outer Veto above these made of crossed scintillator strips. Muons are reconstructed by their Outer Veto hit positions along with timing information from the other two detector volumes. All muons are fit under the hypothesis that they are through-going and ultrarelativistic. If the energy depositions suggest that the muon may have stopped, the reconstruction fits also for this hypothesis and chooses between the two via the relative goodness-of-fit. In the ideal case of a through-going muon intersecting the center of the detector, the resolution is ~40 mm in each transverse dimension. High quality muon reconstruction is an important tool for reducing the impact of the cosmogenic isotope background in Double Chooz.

  1. The double-beta decay: Theoretical challenges

    SciTech Connect (OSTI)

    Horoi, Mihai

    2012-11-20

    Neutrinoless double beta decay is a unique process that could reveal physics beyond the Standard Model of particle physics namely, if observed, it would prove that neutrinos are Majorana particles. In addition, it could provide information regarding the neutrino masses and their hierarchy, provided that reliable nuclear matrix elements can be obtained. The two neutrino double beta decay is an associate process that is allowed by the Standard Model, and it was observed for about ten nuclei. The present contribution gives a brief review of the theoretical challenges associated with these two process, emphasizing the reliable calculation of the associated nuclear matrix elements.

  2. On the neutrinoless double ?{sup +}/EC decays

    SciTech Connect (OSTI)

    Suhonen, Jouni

    2013-12-30

    The neutrinoless double positron-emission/electron-capture (0??{sup +}/EC) decays are studied for the magnitudes of the involved nuclear matrix elements (NMEs). Decays to the ground state, 0{sub gs}{sup +}, and excited 0{sup +} states are discussed. The participant many-body wave functions are evaluated in the framework of the quasiparticle random-phase approximation (QRPA). Effective, G-matrix-derived nuclear forces are used in realistic single-particle model spaces. The channels ?{sup +}?{sup +}, ?{sup +}EC, and the resonant neutrinoless double electron capture (R0?ECEC) are discussed.

  3. Tests of general relativity from timing the double pulsar

    E-Print Network [OSTI]

    M. Kramer; I. H. Stairs; R. N. Manchester; M. A. McLaughlin; A. G. Lyne; R. D. Ferdman; M. Burgay; D. R. Lorimer; A. Possenti; N. D'Amico; J. M. Sarkissian; G. B. Hobbs; J. E. Reynolds; P. C. C. Freire; F. Camilo

    2006-09-14

    The double pulsar system, PSR J0737-3039A/B, is unique in that both neutron stars are detectable as radio pulsars. This, combined with significantly higher mean orbital velocities and accelerations when compared to other binary pulsars, suggested that the system would become the best available testbed for general relativity and alternative theories of gravity in the strong-field regime. Here we report on precision timing observations taken over the 2.5 years since its discovery and present four independent strong-field tests of general relativity. Use of the theory-independent mass ratio of the two stars makes these tests uniquely different from earlier studies. By measuring relativistic corrections to the Keplerian description of the orbital motion, we find that the ``post-Keplerian'' parameter s agrees with the value predicted by Einstein's theory of general relativity within an uncertainty of 0.05%, the most precise test yet obtained. We also show that the transverse velocity of the system's center of mass is extremely small. Combined with the system's location near the Sun, this result suggests that future tests of gravitational theories with the double pulsar will supersede the best current Solar-system tests. It also implies that the second-born pulsar may have formed differently to the usually assumed core-collapse of a helium star.

  4. Search for Heavy Neutral MSSM Higgs Bosons with CMS: Reach and Higgs-Mass Precision

    E-Print Network [OSTI]

    S. Gennai; S. Heinemeyer; A. Kalinowski; R. Kinnunen; S. Lethi; A. Nikitenko; G. Weiglein

    2007-04-04

    The search for MSSM Higgs bosons will be an important goal at the LHC. We analyze the search reach of the CMS experiment for the heavy neutral MSSM Higgs bosons with an integrated luminosity of 30 or 60 fb^-1. This is done by combining the latest results for the CMS experimental sensitivities based on full simulation studies with state-of-the-art theoretical predictions of MSSM Higgs-boson properties. The results are interpreted in MSSM benchmark scenarios in terms of the parameters tan_beta and the Higgs-boson mass scale, M_A. We study the dependence of the 5 sigma discovery contours in the M_A-tan_beta plane on variations of the other supersymmetric parameters. The largest effects arise from a change in the higgsino mass parameter mu, which enters both via higher-order radiative corrections and via the kinematics of Higgs decays into supersymmetric particles. While the variation of $\\mu$ can shift the prospective discovery reach (and correspondingly the ``LHC wedge'' region) by about Delta tan_beta = 10, we find that the discovery reach is rather stable with respect to the impact of other supersymmetric parameters. Within the discovery region we analyze the accuracy with which the masses of the heavy neutral Higgs bosons can be determined. We find that an accuracy of 1-4% should be achievable, which could make it possible in favourable regions of the MSSM parameter space to experimentally resolve the signals of the two heavy MSSM Higgs bosons at the LHC.

  5. Reaching Social Media Goals on Facebook, Twitter | OpenEI Community

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to:EA EIS Report UrlNM-b < RAPID‎Wind FarmReFuel America Jump to:Reaching

  6. Robot-assisted reaching exercise promotes arm movement recovery in chronic hemiparetic stroke: a randomized controlled pilot study

    E-Print Network [OSTI]

    Kahn, Leonard E; Zygman, Michele L; Rymer, W Zev; Reinkensmeyer, David J

    2006-01-01

    AN, Kahn LE: Design of robot assistance for arm movementOpen Access Research Robot-assisted reaching exercisemovements more than the robot-assisted group. Conclusion:

  7. HANFORD DOUBLE SHELL TANK THERMAL AND SEISMIC PROJECT SEISMIC ANALYSIS OF HANFORD DOUBLE SHELL TANKS

    SciTech Connect (OSTI)

    MACKEY TC; RINKER MW; CARPENTER BG; HENDRIX C; ABATT FG

    2009-01-15

    M&D Professional Services, Inc. (M&D) is under subcontract to Pacific Northwest National Laboratories (PNNL) to perform seismic analysis of the Hanford Site Double-Shell Tanks (DSTs) in support of a project entitled Double-Shell Tank (DST) Integrity Project - DST Thermal and Seismic Analyses. The original scope of the project was to complete an up-to-date comprehensive analysis of record of the DST System at Hanford in support of Tri-Party Agreement Milestone M-48-14. The work described herein was performed in support of the seismic analysis of the DSTs. The thermal and operating loads analysis of the DSTs is documented in Rinker et al. (2004). Although Milestone M-48-14 has been met, Revision I is being issued to address external review comments with emphasis on changes in the modeling of anchor bolts connecting the concrete dome and the steel primary tank. The work statement provided to M&D (PNNL 2003) required that a nonlinear soil structure interaction (SSI) analysis be performed on the DSTs. The analysis is required to include the effects of sliding interfaces and fluid sloshing (fluid-structure interaction). SSI analysis has traditionally been treated by frequency domain computer codes such as SHAKE (Schnabel, et al. 1972) and SASSI (Lysmer et al. 1999a). Such frequency domain programs are limited to the analysis of linear systems. Because of the contact surfaces, the response of the DSTs to a seismic event is inherently nonlinear and consequently outside the range of applicability of the linear frequency domain programs. That is, the nonlinear response of the DSTs to seismic excitation requires the use of a time domain code. The capabilities and limitations of the commercial time domain codes ANSYS{reg_sign} and MSC Dytran{reg_sign} for performing seismic SSI analysis of the DSTs and the methodology required to perform the detailed seismic analysis of the DSTs has been addressed in Rinker et al (2006a). On the basis of the results reported in Rinker et al. (2006a), it is concluded that time-domain SSI analysis using ANSYS{reg_sign} is justified for predicting the global response of the DSTs. The most significant difference between the current revision (Revision 1) of this report and the original issue (Revision 0) is the treatment of the anchor bolts that tie the steel dome of the primary tank to the concrete tank dome.

  8. HANFORD DOUBLE SHELL TANK (DST) THERMAL & SEISMIC PROJECT SEISMIC ANALYSIS OF HANFORD DOUBLE SHELL TANKS

    SciTech Connect (OSTI)

    MACKEY, T.C.

    2006-03-17

    M&D Professional Services, Inc. (M&D) is under subcontract to Pacific Northwest National Laboratory (PNNL) to perform seismic analysis of the Hanford Site double-shell tanks (DSTs) in support of a project entitled ''Double-Shell Tank (DSV Integrity Project--DST Thermal and Seismic Analyses)''. The overall scope of the project is to complete an up-to-date comprehensive analysis of record of the DST system at Hanford in support of Tri-Party Agreement Milestone M-48-14, The work described herein was performed in support of the seismic analysis of the DSTs. The thermal and operating loads analysis of the DSTs is documented in Rinker et al. (2004). The work statement provided to M&D (PNNL 2003) required that the seismic analysis of the DSTs assess the impacts of potentially non-conservative assumptions in previous analyses and account for the additional soil mass due to the as-found soil density increase, the effects of material degradation, additional thermal profiles applied to the full structure including the soil-structure response with the footings, the non-rigid (low frequency) response of the tank roof, the asymmetric seismic-induced soil loading, the structural discontinuity between the concrete tank wall and the support footing and the sloshing of the tank waste. The seismic analysis considers the interaction of the tank with the surrounding soil and the effects of the primary tank contents. The DSTs and the surrounding soil are modeled as a system of finite elements. The depth and width of the soil incorporated into the analysis model are sufficient to obtain appropriately accurate analytical results. The analyses required to support the work statement differ from previous analysis of the DSTs in that the soil-structure interaction (SSI) model includes several (nonlinear) contact surfaces in the tank structure, and the contained waste must be modeled explicitly in order to capture the fluid-structure interaction behavior between the primary tank and contained waste.

  9. Double tracks test site characterization report

    SciTech Connect (OSTI)

    NONE

    1996-05-01

    This report presents the results of site characterization activities performed at the Double Tracks Test Site, located on Range 71 North, of the Nellis Air Force Range (NAFR) in southern Nevada. Site characterization activities included reviewing historical data from the Double Tracks experiment, previous site investigation efforts, and recent site characterization data. The most recent site characterization activities were conducted in support of an interim corrective action to remediate the Double Tracks Test Site to an acceptable risk to human health and the environment. Site characterization was performed using a phased approach. First, previously collected data and historical records sere compiled and reviewed. Generalized scopes of work were then prepared to fill known data gaps. Field activities were conducted and the collected data were then reviewed to determine whether data gaps were filled and whether other areas needed to be investigated. Additional field efforts were then conducted, as required, to adequately characterize the site. Characterization of the Double Tracks Test Site was conducted in accordance with the US Department of Energy`s (DOE) Streamlined Approach for Environmental Restoration (SAFER).

  10. Cretan Hieroglyphic Wool Units (LANA, double mina)

    E-Print Network [OSTI]

    Younger, John G.

    2005-01-01

    Minoan Hieroglyphic document CHIC *089, on analogy with Linear A and B wool documents, records the wool of a certain type of cloth as the equivalent in weight of 3 double minas, that is 1 wool unit (or the wool from 4 sheep).

  11. Double layer capacitor prospects look good

    SciTech Connect (OSTI)

    1995-07-01

    The Fourth International Seminar in Double Layer Capacitors and similar energy devices has been sponsored again by Dr. S.P. Wolsky and Dr. Nikola Marincic. The seminar was held in December 1994, at Deerfield Beach, FL. This report provides a brief description of information on supercapacitors.

  12. Search for Heavy Neutral MSSM Higgs Bosons with CMS: Reach and Higgs-Mass Precision

    E-Print Network [OSTI]

    Gennai, S; Kalinowski, A; Kinnunen, R; Lethi, S; Nikitenko, A; Weiglein, G

    2007-01-01

    The search for MSSM Higgs bosons will be an important goal at the LHC. We analyze the search reach of the CMS experiment for the heavy neutral MSSM Higgs bosons with an integrated luminosity of 30 or 60 fb^-1. This is done by combining the latest results for the CMS experimental sensitivities based on full simulation studies with state-of-the-art theoretical predictions of MSSM Higgs-boson properties. The results are interpreted in MSSM benchmark scenarios in terms of the parameters tan_beta and the Higgs-boson mass scale, M_A. We study the dependence of the 5 sigma discovery contours in the M_A-tan_beta plane on variations of the other supersymmetric parameters. The largest effects arise from a change in the higgsino mass parameter mu, which enters both via higher-order radiative corrections and via the kinematics of Higgs decays into supersymmetric particles. While the variation of $\\mu$ can shift the prospective discovery reach (and correspondingly the ``LHC wedge'' region) by about Delta tan_beta = 10, we...

  13. Novel Nuclear Structure Aspects of the Neutrinoless Double Beta Decay

    E-Print Network [OSTI]

    J. Menendez; A. Poves; E. Caurier; F. Nowacki

    2010-07-28

    We explore the influence of the deformation on the nuclear matrix elements of the neutrinoless double beta decay (NME), concluding that the difference in deformation -or more generally in the amount of quadrupole correlations- between parent and grand daughter nuclei quenches strongly the decay. We correlate these differences with the seniority structure of the nuclear wave functions. In this context, we examine the present discrepancies between the NME's obtained in the framework of the Interacting Shell Model and the Quasiparticle RPA. We surmise that part of the discrepancy can be due to the limitations of the spherical QRPA in treating nuclei which have strong quadrupole correlations. We surmise that the NME's in a basis of generalized seniority are approximately model independent, i. e. they are "universal".

  14. Rational design of hybrid dye-sensitized solar cells composed of double-layered photoanodes with

    E-Print Network [OSTI]

    Lin, Zhiqun

    Rational design of hybrid dye-sensitized solar cells composed of double-layered photoanodes,a Bailiang Xue,b Wei Liu,c Zhiqun Lina and Yulin Deng*bc A uniquely structured dye-sensitized solar cell photoanodes have complementary roles in absorbing solar light at different wavelengths. The power conversion

  15. Study of a double bubbler for material balance in liquids

    SciTech Connect (OSTI)

    Hugues Lambert

    2013-09-01

    The objective of this project was to determine the potential of a double bubbler to measure density and fluid level of the molten salt contained in an electrorefiner. Such in-situ real-time measurements can provide key information for material balances in the pyroprocessing of the nuclear spent fuel. This theoretical study showed this technique has a lot of promise. Four different experiments were designed and performed. The first three experiments studied the influence of a variety of factors such as depth difference between the two tubes, gas flow rate, the radius of the tubes and determining the best operating conditions. The last experiment purpose was to determine the precision and accuracy of the apparatus during specific conditions. The elected operating conditions for the characterization of the system were a difference of depth of 25 cm and a flow rate of 55 ml/min in each tube. The measured densities were between 1,000 g/l and 1,400g/l and the level between 34cm and 40 cm. The depth difference between the tubes is critical, the larger, the better. The experiments showed that the flow rate should be the same in each tube. The concordances with theoretical predictions were very good. The density precision was very satisfying (spread<0.1%) and the accuracy was about 1%. For the level determination, the precision was also very satisfying (spread<0.1%), but the accuracy was about 3%. However, those two biases could be corrected with calibration curves. In addition to the aqueous systems studied in the present work, future work will focus on examining the behavior of the double bubbler instrumentation in molten salt systems. The two main challenges which were identified in this work are the effect of the temperature and the variation of the superficial tension.

  16. INFLUENCE OF ROCKY REACH DAM AND THE TEMPERATURE OF THE OKANOGAN RIVER ON THE UPSTREAM MIGRATION OF SOCKEYE

    E-Print Network [OSTI]

    INFLUENCE OF ROCKY REACH DAM AND THE TEMPERATURE OF THE OKANOGAN RIVER ON THE UPSTREAM MIGRATION Reach Dam, constructed on the Columbia River 7 miles above Wenatchee, Wash.· in 1957-61, has not appreciably increased the time required for adult sockeye salmon (Oncorhynchus nerka) to mi~rate to Zosel Dam

  17. Diapycnal advection by double diffusion and turbulence in the ocean

    E-Print Network [OSTI]

    St. Laurent, Louis C

    1999-01-01

    Observations of diapycnal mixing rates are examined and related to diapycnal advection for both double-diffusive and turbulent regimes. The role of double-diffusive mixing at the site of the North Atlantic Tracer Release ...

  18. The effects of double-diffusion on a baroclinic vortex

    E-Print Network [OSTI]

    Smith, Wendy Marie

    1987-01-01

    Laboratory experiments were performed to study the combined effects of double-diffusion and rotation on an oceanic intrusion. Intrusions are driven across density-compensated fronts by the divergence of the double-diffusive ...

  19. National CHP Roadmap: Doubling Combined Heat and Power Capacity...

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

    CHP Roadmap: Doubling Combined Heat and Power Capacity in the United States by 2010, March 2001 National CHP Roadmap: Doubling Combined Heat and Power Capacity in the United States...

  20. Computer code for double beta decay QRPA based calculations

    E-Print Network [OSTI]

    Bertulani, Carlos A. - Department of Physics and Astronomy, Texas A&M University

    the experimental bound [11] on neutrinoless double beta decay (## 0# ). The only way out would be to have two

  1. Use of coiled tubing during the Wytch Farm extended-reach drilling project

    SciTech Connect (OSTI)

    Summers, T.; Larsen, H.A.; Redway, M.; Hill, G.

    1995-05-01

    The largest onshore oil field in western Europe is in an environmentally sensitive coastal area in southern England. Initial development of the field in the late 1970`s focused on accessing reserves underlying the onshore section of the reservoir. In 1989, various development options were screened to access the offshore section of the reservoir, containing {approx} 80 million bbl of recoverable oil. In 1991, the decision was made to access these reserves through extended-reach drilling (ERD) from an existing onshore wellsite. This development is currently under way, with 3 of 11 planned wells already drilled and producing. This paper describes the application of coiled tubing (CT) in the logging and completion phases of the ERD wells drilled to date. Conclusions are made as to the value of coiled tubing in ERD wells to minimize rig time and the current limits of technology.

  2. The use of coiled tubing during the Wytch Farm extended reach drilling project

    SciTech Connect (OSTI)

    Summers, T.; Larsen, H.A.; Redway, M.; Hill, G.

    1994-12-31

    The largest onshore oilfield in Western Europe is situated in an environmentally sensitive coastal area on the south coast of England. Initial development of the field in the late 1970`s focused on accessing reserves underlying the onshore section of the reservoir. In 1989, various development options were screened to access the offshore section of the reservoir, containing some 80 million barrels of recoverable oil. In 1991, the decision was made to access these reserves through extended reach drilling (ERD) from an existing onshore well-site. This development is currently underway, with three out of a planned eleven wells already drilled and producing. This paper will describe the application of Coiled Tubing in the logging and completion phases of the ERD wells drilled to date.

  3. Sensitivity of CUORE to Neutrinoless Double-Beta Decay

    E-Print Network [OSTI]

    Alessandria, F.

    2013-01-01

    of CUORE to Neutrinoless Double-Beta Decay b c,:L d e f F .s t results on neutrinoless double beta decay of T e w i t hthe study of neutrinoless double beta decay, J . C r y s t .

  4. The Majorana Neutrinoless Double-Beta Decay Experiment

    E-Print Network [OSTI]

    Washington at Seattle, University of - Department of Physics, Electroweak Interaction Research Group

    The Majorana Neutrinoless Double-Beta Decay Experiment Pre-conceptual Design Proposal November 22 Motivation for Neutrinoless Double-Beta Decay Experiments . . . . . . . . . 4 2.1.1 Community Guidance Neutrinoless Double-Beta Decay Results . . . . . . . . . . . . . . . . . . . . 12 2.5 Next

  5. Background reduction and sensitivity for germanium double beta decay experiments

    E-Print Network [OSTI]

    H. Gómez; S. Cebrián; J. Morales; J. A. Villar

    2007-08-29

    Germanium detectors have very good capabilities for the investigation of rare phenomena like the neutrinoless double beta decay. Rejection of the background entangling the expected signal is one primary goal in this kind of experiments. Here, the attainable background reduction in the energy region where the neutrinoless double beta decay signal of 76Ge is expected to appear has been evaluated for experiments using germanium detectors, taking into consideration different strategies like the granularity of the detector system, the segmentation of each individual germanium detector and the application of Pulse Shape Analysis techniques to discriminate signal from background events. Detection efficiency to the signal is affected by background rejection techniques, and therefore it has been estimated for each of the background rejection scenarios considered. Finally, conditions regarding crystal mass, radiopurity, exposure to cosmic rays, shielding and rejection capabilities are discussed with the aim to achieve a background level of 10-3 c keV-1 kg-1 y-1 in the region of interest, which would allow to explore neutrino effective masses around 40 meV.

  6. Double pulse Thomson scattering system at RTP

    SciTech Connect (OSTI)

    Beurskens, M.N.; Barth, C.J.; Chu, C.C.; Donne, A.J.; Herranz, J.A.; Lopes Cardozo, N.J.; van der Meiden, H.J.; Pijper, F.J. [FOM-Instituut voor Plasmafysica `Rijnhuizen`, Associatie Euratom-FOM, 3430 BE Nieuwegein (The Netherlands)] [FOM-Instituut voor Plasmafysica `Rijnhuizen`, Associatie Euratom-FOM, 3430 BE Nieuwegein (The Netherlands)

    1997-01-01

    In this article a double pulse multiposition Thomson scattering diagnostic, under construction at RTP, is discussed. Light from a double pulsed ruby laser (pulse separation: 10{endash}800 {mu}s, max. 2{times}12.5 J) is scattered by the free electrons of the tokamak plasma and relayed to a Littrow polychromator for spectral analysis. The spectrally resolved light is recorded by two ICCD detectors. Simulations show that the system sensitivity will be such that electron temperatures in the range of 100 eV{endash}7 keV can be determined with an accuracy as good as 2{percent}{endash}3{percent} for electron densities of 10{sup 20} m{sup {minus}3}, with a spatial resolution down to 2.6 mm. With this diagnostic the dynamics of small scale structures in the electron temperature profile will be studied. {copyright} {ital 1997 American Institute of Physics.}

  7. JUNO and Neutrinoless Double Beta Decay

    E-Print Network [OSTI]

    Shao-Feng Ge; Werner Rodejohann

    2015-07-20

    We study the impact of the precision determination of oscillation parameters in the JUNO experiment on half-life predictions for neutrinoless double beta decay. We show that the solar neutrino mixing angle can be measured by JUNO with below 1% uncertainty. This implies in particular that the minimal value of the effective mass in the inverted mass ordering will be known essentially without uncertainty. We demonstrate that this reduces the range of half-life predictions in order to test this value by a factor of two. The remaining uncertainty is caused by nuclear matrix elements. This has important consequences for future double beta decay experiments that aim at ruling out the inverted mass ordering or the Majorana nature of neutrinos.

  8. Fermion Doubling in Loop Quantum Gravity

    E-Print Network [OSTI]

    Jacob Barnett; Lee Smolin

    2015-07-05

    In this paper, we show that the Hamiltonian approach to loop quantum gravity has a fermion doubling problem. To obtain this result, we couple loop quantum gravity to a free massless scalar and a chiral fermion field, gauge fixing the many fingered time gauge invariance by interpreting the scalar field as a physical clock. We expand around a quantum gravity state based on a regular lattice and consider the limit where the bare cosmological constant is large but the fermonic excitations have energies low in Planck units. We then make the case for identifying the energy spectrum in this approximation with that of a model of lattice fermion theory which is known to double.

  9. Importance of neutrinoless double beta decay

    E-Print Network [OSTI]

    Utpal Sarkar

    2007-12-17

    A natural explanation for the smallness of the neutrino mass requires them to be Majorana particles violating lepton number by two units. Since lepton number violation can have several interesting consequences in particle physics and cosmology, it is of utmost importance to find out if there is lepton number violation in nature and what is its magnitude. The neutrinoless double beta decay experiment can answer these questions: if there is lepton number violation and if neutrinos are Majorana particles. In addition, the magnitude of neutrinoless double beta decay will constrain any other lepton number violating processes. This lepton number violation may also be relatd to the matter-antimatter asymmetry of the universe, dark matter and cosmological constant.

  10. JUNO and Neutrinoless Double Beta Decay

    E-Print Network [OSTI]

    Ge, Shao-Feng

    2015-01-01

    We study the impact of the precision determination of oscillation parameters in the JUNO experiment on half-life predictions for neutrinoless double beta decay. We show that the solar neutrino mixing angle can be measured by JUNO with below 1% uncertainty. This implies in particular that the minimal value of the effective mass in the inverted mass ordering will be known essentially without uncertainty. We demonstrate that this reduces the range of half-life predictions in order to test this value by a factor of two. The remaining uncertainty is caused by nuclear matrix elements. This has important consequences for future double beta decay experiments that aim at ruling out the inverted mass ordering or the Majorana nature of neutrinos.

  11. Recombination energy in double white dwarf formation

    E-Print Network [OSTI]

    Nandez, Jose L A; Lombardi, James C

    2015-01-01

    In this Letter we investigate the role of recombination energy during a common envelope event. We confirm that taking this energy into account helps to avoid the formation of the circumbinary envelope commonly found in previous studies. For the first time, we can model a complete common envelope event, with a clean compact double white dwarf binary system formed at the end. The resulting binary orbit is almost perfectly circular. In addition to considering recombination energy, we also show that between 1/4 and 1/2 of the released orbital energy is taken away by the ejected material. We apply this new method to the case of the double-white dwarf system WD 1101+364, and we find that the progenitor system at the start of the common envelope event consisted of a $\\sim1.5M_\\odot$ red giant star in a $\\sim 30$ day orbit with a white dwarf companion.

  12. Double Talk: Asturias's America in Cuculcán

    E-Print Network [OSTI]

    Unruh, Vicky

    1992-09-01

    Vicky Unruh, University of Kansas Double Talk: Asturias's America in Cuculcan^ M iguel Angel Asturias's Cuculcan, a dra- matic collage of color, sound, motion, and words, is his most overtly ethnographic play, and, as a product of his... vanguardist years, it is also the most radically experimental. Cuculcan did not appear in print until 1948,2 but Asturias de- scribed the work in progress in a 1932 journalis- tic essay, "Las posibilidades de un teatro americano."3 Although both Cuculcan...

  13. Double-clad nuclear fuel safety rod

    DOE Patents [OSTI]

    McCarthy, William H. (Los Altos, CA); Atcheson, Donald B. (Cupertino, CA); Vaidyanathan, Swaminathan (San Jose, CA)

    1984-01-01

    A device for shutting down a nuclear reactor during an undercooling or overpower event, whether or not the reactor's scram system operates properly. This is accomplished by double-clad fuel safety rods positioned at various locations throughout the reactor core, wherein melting of a secondary internal cladding of the rod allows the fuel column therein to shift from the reactor core to place the reactor in a subcritical condition.

  14. Neutrinoless Double Beta Decay and its "Inverse"

    E-Print Network [OSTI]

    Clemens A. Heusch; Peter Minkowski

    1996-11-18

    Recent considerations by these authors pointed out the attractive features which a search for the exchange of heavy Majorana neutrinos could have for solving the mass and the lepton number puzzles for all neutrinos, in TeV-level electron-electron scattering. In the present note, we show that, contrary to subsequently published arguments, non-observation of neutrinoless double beta decay has, to date, no bearing on the promise of this important task for future linear electron colliders.

  15. Tetraquark Production in Double Parton Scattering

    E-Print Network [OSTI]

    F. Carvalho; E. R. Cazaroto; V. P. Gonçalves; F. S. Navarra

    2015-11-23

    We develop a model to study tetraquark production in hadronic collisions. We focus on double parton scattering and formulate a version of the color evaporation model for the production of the $X(3872)$ and of the $T_{4c}$ tetraquark, a state composed by the $c \\bar{c} c \\bar{c}$ quarks. We find that the production cross section grows rapidly with the collision energy $\\sqrt{s}$ and make predictions for the forthcoming higher energy data of the LHC.

  16. Vibration of Generalized Double Well Oscillators

    E-Print Network [OSTI]

    Grzegorz Litak; Marek Borowiec; Arkadiusz Syta

    2006-10-20

    We have applied the Melnikov criterion to examine a global homoclinic bifurcation and transition to chaos in a case of a double well dynamical system with a nonlinear fractional damping term and external excitation. The usual double well Duffing potential having a negative square term and positive quartic term has been generalized to a double well potential with a negative square term and a positive one with an arbitrary real exponent $q > 2$. We have also used a fractional damping term with an arbitrary power $p$ applied to velocity which enables one to cover a wide range of realistic damping factors: from dry friction $p \\to 0$ to turbulent resistance phenomena $p=2$. Using perturbation methods we have found a critical forcing amplitude $\\mu_c$ above which the system may behave chaotically. Our results show that the vibrating system is less stable in transition to chaos for smaller $p$ satisfying an exponential scaling low. The critical amplitude $\\mu_c$ as an exponential function of $p$. The analytical results have been illustrated by numerical simulations using standard nonlinear tools such as Poincare maps and the maximal Lyapunov exponent. As usual for chosen system parameters we have identified a chaotic motion above the critical Melnikov amplitude $\\mu_c$.

  17. Double beta decays of {sup 106}Cd

    SciTech Connect (OSTI)

    Suhonen, Jouni [Department of Physics, P.O. Box 35 (YFL), FI-40014 University of Jyvaeskylae (Finland)

    2011-12-16

    The two-neutrino (2{nu}2{beta}) and neutrinoless (0{nu}2{beta}) double beta decays of {sup 106}Cd are studied for the transitions to the ground state 0{sub gs}{sup +} and 0{sup +} and 2{sup +} excited states in {sup 106}Pd by using realistic many-body wave functions calculated in the framework of the quasiparticle random-phase approximation. Effective, G-matrix-derived nuclear forces are used in realistic single-particle model spaces. All the possible channels, {beta}{sup +}{beta}{sup +}, {beta}{sup +}EC, and ECEC, are discussed for both the 2{nu}2{beta} and 0{nu}2{beta} decays. The associated half-lives are computed and particular attention is devoted to the study of the detectability of the resonant neutrinoless double electron capture (R0{nu}ECEC) process in {sup 106}Cd. The calculations of the present article constitute the thus far most complete and up-to-date investigation of the double-beta-decay properties of {sup 106}Cd.

  18. Using the Conceptual Site Model to Remediate Two Sites in New England and Reach License Termination and Site Reuse

    SciTech Connect (OSTI)

    Glucksberg, Nadia; Peters, Jay

    2008-01-15

    The Conceptual Site Model (CSM) is a powerful tool for understanding the link between contamination sources, cleanup objectives, and ultimate site reuse. The CSM describes the site setting, geology, hydrogeology, potential sources, release mechanisms and migration pathways of contaminants. The CSM is needed to understand the extent of contamination and how receptors may be exposed to both radiological and chemical constituents. A key component of the CSM that is often overlooked concerns how the regulatory requirements drive remediation and how each has to be integrated into the CSM to ensure that all stakeholder requirements are understood and addressed. This paper describes how the use of the CSM helped reach closure and reuse at two facilities in Connecticut that are pursuing termination of their Nuclear Regulatory Commission (NRC) license. The two facilities are the Combustion Engineering Site, located in Windsor, Connecticut, (CE Windsor Site) and the Connecticut Yankee Atomic Power Company, located in Haddam Neck, Connecticut (CYAPCO). The closure of each of these facilities is regulated by four agencies: - Nuclear Regulatory Commission (NRC) - which requires cleanup levels for radionuclides to be protective of public health; - US Environmental Protection Agency (USEPA) - which requires cleanup levels for chemicals to be protective of public health and the environment; - Connecticut Department of Environmental Protection (CTDEP) Bureau of Air Management, Radiation Division - which requires cleanup levels for radionuclides to be protective of public health; and - Connecticut Department of Environmental Protection (CTDEP) Bureau of Water Protection and Land Reuse - which requires cleanup levels for chemicals to be protective of public health and the environment. Some of the radionuclides at the CE Windsor Site are also regulated under the Formerly Utilized Site Remedial Action Program (FUSRAP) under the Army Corps of Engineers. The remainder of this paper presents the similarities and differences between the CSMs for these two sites and how each site used the CSM to reach closure. Although each of these site have unique histories and physical features, the CSM approach was used to understand the geology, hydrogeology, migration and exposure pathways, and regulatory requirements to successfully characterize and plan closure of the sites. A summary of how these attributes affected site closure is provided.

  19. Exploring the Neutrinoless Double Beta Decay in the Inverted Neutrino Hierarchy with Bolometric Detectors

    E-Print Network [OSTI]

    Artusa, D. R.

    2014-01-01

    Exploring the Neutrinoless Double Beta Decay in the InvertedC. Giunti, Neutrinoless double-beta decay. A brief review,el- ements for neutrinoless double-beta decay and double-

  20. Reaching Grid Parity Using BP Solar Crystalline Silicon Technology: A Systems Class Application

    SciTech Connect (OSTI)

    Cunningham, Daniel W; Wohlgemuth, John; Carlson, David E; Clark, Roger F; Gleaton, Mark; Posbic, John P; Zahler, James

    2010-12-06

    The primary target market for this program was the residential and commercial PV markets, drawing on BP Solar's premium product and service offerings, brand and marketing strength, and unique routes to market. These two markets were chosen because: (1) in 2005 they represented more than 50% of the overall US PV market; (2) they are the two markets that will likely meet grid parity first; and (3) they are the two market segments in which product development can lead to the added value necessary to generate market growth before reaching grid parity. Federal investment in this program resulted in substantial progress toward the DOE TPP target, providing significant advancements in the following areas: (1) Lower component costs particularly the modules and inverters. (2) Increased availability and lower cost of silicon feedstock. (3) Product specifically developed for residential and commercial applications. (4) Reducing the cost of installation through optimization of the products. (5) Increased value of electricity in mid-term to drive volume increases, via the green grid technology. (6) Large scale manufacture of PV products in the US, generating increased US employment in manufacturing and installation. To achieve these goals BP Solar assembled a team that included suppliers of critical materials, automated equipment developers/manufacturers, inverter and other BOS manufacturers, a utility company, and University research groups. The program addressed all aspects of the crystalline silicon PV business from raw materials (particularly silicon feedstock) through installation of the system on the customers site. By involving the material and equipment vendors, we ensured that supplies of silicon feedstock and other PV specific materials like encapsulation materials (EVA and cover glass) will be available in the quantities required to meet the DOE goals of 5 to 10 GW of installed US PV by 2015 and at the prices necessary for PV systems to reach grid parity in 2015. This final technical report highlights the accomplishments of the BP Solar technical team from 2006 to the end of the project in February 2010. All the main contributors and team members are recognized for this accomplishment and their endeavors are recorded in the twelve main tasks described here.

  1. Improved background rejection in neutrinoless double beta decay experiments using a magnetic field in a high pressure xenon TPC

    E-Print Network [OSTI]

    J. Renner; A. Cervera; J. A. Hernando; A. Imzaylov; F. Monrabal; J. Muñoz; D. Nygren; J. J. Gomez-Cadenas

    2015-09-06

    We demonstrate that the application of an external magnetic field could lead to an improved background rejection in neutrinoless double-beta (0nbb) decay experiments using a high pressure xenon (HPXe) TPC. HPXe chambers are capable of imaging electron tracks, a feature that enhances the separation between signal events (the two electrons emitted in the 0nbb decay of 136Xe) and background events, arising chiefly from single electrons of kinetic energy compatible with the end-point of the 0nbb decay (Qbb ). Applying an external magnetic field of sufficiently high intensity (in the range of 0.5-1 Tesla for operating pressures in the range of 5-15 atmospheres) causes the electrons to produce helical tracks. Assuming the tracks can be properly reconstructed, the sign (direction) of curvature can be determined at several points along these tracks, and such information can be used to separate signal (0nbb) events containing two electrons producing a track with two different directions of curvature from background (single-electron) events producing a track that should spiral in a single direction. Due to electron multiple scattering, this strategy is not perfectly efficient on an event-by-event basis, but a statistical estimator can be constructed which can be used to reject background events by one order of magnitude at a moderate cost (approx. 30%) in signal efficiency. Combining this estimator with the excellent energy resolution and topological signature identification characteristic of the HPXe TPC, it is possible to reach a background rate of less than one count per ton-year of exposure. Such a low background rate is an essential feature of the next generation of 0nbb experiments, aiming to fully explore the inverse hierarchy of neutrino masses.

  2. EVIDENCE FOR A MILKY WAY TIDAL STREAM REACHING BEYOND 100 kpc

    SciTech Connect (OSTI)

    Drake, A. J.; Djorgovski, S. G.; Graham, M. J.; Mahabal, A.; Donalek, C.; Williams, R. [California Institute of Technology, 1200 E. California Blvd., CA 91225 (United States); Catelan, M.; Torrealba, G. [Pontificia Universidad Catolica de Chile, Departamento de Astronomia y Astrofisica, Facultad de Fisica, Av. Vicuna Mackena 4860, 782-0436 Macul, Santiago (Chile); Prieto, J. L. [Department of Astronomy, Princeton University, 4 Ivy Lane, Princeton, NJ 08544 (United States); Larson, S.; Christensen, E.; Beshore, E. [Department of Planetary Sciences, University of Arizona, Lunar and Planetary Laboratory, 1629 E. University Blvd., Tucson AZ 85721 (United States)

    2013-03-10

    We present the analysis of 1207 RR Lyrae found in photometry taken by the Catalina Survey's Mount Lemmon telescope. By combining accurate distances for these stars with measurements for {approx}14,000 type-ab RR Lyrae from the Catalina Schmidt telescope, we reveal an extended association that reaches Galactocentric distances beyond 100 kpc and overlaps the Sagittarius stream system. This result confirms earlier evidence for the existence of an outer halo tidal stream resulting from a disrupted stellar system. By comparing the RR Lyrae source density with that expected based on halo models, we find the detection has {approx}8{sigma} significance. We investigate the distances, radial velocities, metallicities, and period-amplitude distribution of the RR Lyrae. We find that both radial velocities and distances are inconsistent with current models of the Sagittarius stream. We also find tentative evidence for a division in source metallicities for the most distant sources. Following prior analyses, we compare the locations and distances of the RR Lyrae with photometrically selected candidate horizontal branch stars and find supporting evidence that this structure spans at least 60 Degree-Sign of the sky. We investigate the prospects of an association between the stream and the unusual globular cluster NGC 2419.

  3. How to get to the Victory Room Cross the Bourke Street Pedestrian Bridge from Southern Cross Station until you reach

    E-Print Network [OSTI]

    Liley, David

    Cross Station until you reach Gate 2. Turn to your left, walk to Gate 9 and follow the signs. Take the lift to Level 1 and follow the signs to the Victory Room. By Taxi Direct the taxi to stop

  4. Neutrinoless Double Beta Decay in Type I+II Seesaw Models

    E-Print Network [OSTI]

    Debasish Borah; Arnab Dasgupta

    2015-09-06

    We study neutrinoless double beta decay in left-right symmetric extension of the standard model with type I and type II seesaw origin of neutrino masses. Due to the enhanced gauge symmetry as well as extended scalar sector, there are several new physics sources of neutrinoless double beta decay in this model. Ignoring the left-right gauge boson mixing and heavy-light neutrino mixing, we first compute the contributions to neutrinoless double beta decay for type I and type II dominant seesaw separately and compare with the standard light neutrino contributions. We then repeat the exercise by considering the presence of both type I and type II seesaw, having non-negligible contributions to light neutrino masses and show the difference in results from individual seesaw cases. Assuming the new gauge bosons and scalars to be around a TeV, we constrain different parameters of the model including both heavy and light neutrino masses from the requirement of keeping the neutrinoless double beta decay amplitude below the upper limit set by the GERDA experiment.

  5. Neutrinoless Double Beta Decay in Type I+II Seesaw Models

    E-Print Network [OSTI]

    Borah, Debasish

    2015-01-01

    We study neutrinoless double beta decay in left-right symmetric extension of the standard model with type I and type II seesaw origin of neutrino masses. Due to the enhanced gauge symmetry as well as extended scalar sector, there are several new physics sources of neutrinoless double beta decay in this model. Ignoring the left-right gauge boson mixing and heavy-light neutrino mixing, we first compute the contributions to neutrinoless double beta decay for type I and type II dominant seesaw separately and compare with the standard light neutrino contributions. We then repeat the exercise by considering the presence of both type I and type II seesaw, having non-negligible contributions to light neutrino masses and show the difference in results from individual seesaw cases. Assuming the new gauge bosons and scalars to be around a TeV, we constrain different parameters of the model including both heavy and light neutrino masses from the requirement of keeping the neutrinoless double beta decay amplitude below th...

  6. Optical double-slit particle measuring system

    DOE Patents [OSTI]

    Tichenor, D.A.; Wang, J.C.F.; Hencken, K.R.

    1982-03-25

    A method for in situ measurement of particle size is described. The size information is obtained by scanning an image of the particle across a double-slit mask and observing the transmitted light. This method is useful when the particle size of primary interest is 3..mu..m and larger. The technique is well suited to applications in which the particles are non-spherical and have unknown refractive index. It is particularly well suited to high temperature environments in which the particle incandescence provides the light source.

  7. Optical double-slit particle measuring system

    DOE Patents [OSTI]

    Hencken, Kenneth R. (Pleasanton, CA); Tichenor, Daniel A. (Freemont, CA); Wang, James C. F. (Livermore, CA)

    1984-01-01

    A method for in situ measurement of particle size is described. The size information is obtained by scanning an image of the particle across a double-slit mask and observing the transmitted light. This method is useful when the particle size of primary interest is 3 .mu.m and larger. The technique is well suited to applications in which the particles are non-spherical and have unknown refractive index. It is particularly well suited to high temperature environments in which the particle incandescence provides the light source.

  8. Neutrinoless double beta decay and QCD corrections

    E-Print Network [OSTI]

    Namit Mahajan

    2014-01-30

    We consider one loop QCD corrections and renormalization group running of the neutrinoless double beta decay amplitude focusing on the short-range part of the amplitude (without the light neutrino exchange) and find that these corrections can be sizeable. Depending on the operator under consideration, there can be moderate to large cancellations or significant enhancements. We discuss several specific examples in this context. Such large corrections will lead to significant shifts in the half-life estimates which currently are known to be plagued with the uncertainties due to nuclear physics inputs to the physical matrix elements.

  9. Neutrinoless double beta decay and neutrino masses

    SciTech Connect (OSTI)

    Duerr, Michael [Max-Planck-Institut fuer Kernphysik, Saupfercheckweg 1, 69117 Heidelberg (Germany)

    2012-07-27

    Neutrinoless double beta decay (0{nu}{beta}{beta}) is a promising test for lepton number violating physics beyond the standard model (SM) of particle physics. There is a deep connection between this decay and the phenomenon of neutrino masses. In particular, we will discuss the relation between 0{nu}{beta}{beta} and Majorana neutrino masses provided by the so-called Schechter-Valle theorem in a quantitative way. Furthermore, we will present an experimental cross check to discriminate 0{nu}{beta}{beta} from unknown nuclear background using only one isotope, i.e., within one experiment.

  10. NGC 4340: Double Bar + Fossil Nuclear Ring

    E-Print Network [OSTI]

    P. Erwin; J. C. Vega Beltran; J. E. Beckman

    2000-10-03

    NGC 4340 is a double-barred SB0 galaxy in the Virgo cluster (Wozniak et al. 1995). Here, we present evidence that this galaxy also posseses a luminous stellar nuclear ring of relatively old stars with little or no gas. The ring lies just outside the inner bar, at the probable inner inner Lindblad resonance (IILR) of the outer bar. Careful inspection of the isophotes and unsharp masks shows that the two bars are slightly misaligned, which suggests they may be independently rotating.

  11. Double acting stirling engine phase control

    SciTech Connect (OSTI)

    Berchowitz, David M.

    1983-01-01

    A mechanical device for effecting a phase change between the expansion and compression volumes of a double-acting Stirling engine uses helical elements which produce opposite rotation of a pair of crankpins when a control rod is moved, so the phase between two pairs of pistons is changed by +.psi. and the phase between the other two pairs of pistons is changed by -.psi.. The phase can change beyond .psi.=90.degree. at which regenerative braking and then reversal of engine rotation occurs.

  12. The double contact nature of TT Herculis

    SciTech Connect (OSTI)

    Terrell, Dirk; Nelson, Robert H. E-mail: bob.nelson@shaw.ca

    2014-03-01

    We present new radial velocities and photometry of the short-period Algol TT Herculis. Previous attempts to model the light curves of the system have met with limited success, primarily because of the lack of a reliable mass ratio. Our spectroscopic observations are the first to result in radial velocities for the secondary star, and thus provide a spectroscopic mass ratio. Simultaneous analysis of the radial velocities and new photometry shows that the system is a double contact binary, with a rapidly rotating primary that fills its limiting lobe.

  13. A Microscopic Double-Slit Experiment

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach HomeA Better Anode Design to Improve Lithium-Ion Batteries Print Lithium-ionAA Microscopic Double-Slit

  14. A Microscopic Double-Slit Experiment

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach HomeA Better Anode Design to Improve Lithium-Ion Batteries Print Lithium-ionAA Microscopic Double-SlitA

  15. A Microscopic Double-Slit Experiment

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach HomeA Better Anode Design to Improve Lithium-Ion Batteries Print Lithium-ionAA Microscopic Double-SlitAA

  16. A Microscopic Double-Slit Experiment

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach HomeA Better Anode Design to Improve Lithium-Ion Batteries Print Lithium-ionAA Microscopic Double-SlitAAA

  17. Double Coil Condenser Apparatus - Energy Innovation Portal

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would like submit theCovalentLaboratory |Sector Full reportTown2008DonaldEnergyDouble

  18. Reach of Environmental Influences on the Indistinguishability of Single Photons from Quantum Dots

    E-Print Network [OSTI]

    Huber, Tobias; Föger, Daniel; Solomon, Glenn; Weihs, Gregor

    2015-01-01

    In this letter, we present a detailed, all optical study of the influence of different excitation schemes on the indistinguishability of single photons from a single InAs quantum dot. For this study, we measure the Hong-Ou-Mandel interference of consecutive photons from the spontaneous emission of an InAs quantum dot state under various excitation schemes and different excitation conditions and give a comparison.

  19. Heavy-fermion instability in double-degenerate plasmas

    SciTech Connect (OSTI)

    Akbari-Moghanjoughi, M.

    2012-07-15

    In this work, we study the propagations of normal frequency modes for quantum hydrodynamic waves in the linear limit and introduce a new kind of instability in a double-degenerate plasma. Three different regimes, namely, low, intermediate, and high magnetic field strengths are considered which span the applicability of the work to a wide variety of environments. Distinct behavior is observed for different regimes, for instance, in the laboratory-scale field regime no frequency-mode instability occurs unlike those of intermediate and high magnetic-field strength regimes. It is also found that the instability of this kind is due to the heavy-fermions which appear below a critical effective-mass parameter ({mu}{sub cr}={radical}(3)) and that the responses of the two (lower and upper frequency) modes to fractional effective-mass change in different effective-mass parameter ranges (below and above the critical value) are quite opposite to each other. It is shown that the heavy-fermion instability due to extremely high magnetic field such as that encountered for a neutron-star crust can lead to confinement of stable propagations in both lower and upper frequency modes to the magnetic poles. Current study can have important implications for linear wave dynamics in both laboratory and astrophysical environments possessing high magnetic fields.

  20. Double Field Theory on Group Manifolds (Thesis)

    E-Print Network [OSTI]

    Hassler, Falk

    2015-01-01

    This thesis deals with Double Field Theory (DFT), an effective field theory capturing the low energy dynamics of closed strings on a torus. It renders T-duality on a torus manifest by adding $D$ winding coordinates in addition to the $D$ space time coordinates. An essential consistency constraint of the theory, the strong constraint, only allows for field configurations which depend on half of the coordinates of the arising doubled space. I derive DFT${}_\\mathrm{WZW}$, a generalization of the current formalism. It captures the low energy dynamics of a closed bosonic string propagating on a compact group manifold. Its classical action and the corresponding gauge transformations arise from Closed String Field Theory up to cubic order in the massless fields. These results are rewritten in terms of a generalized metric and extended to all orders in the fields. There is an explicit distinction between background and fluctuations. For the gauge algebra to close, the latter have to fulfill a modified strong constrai...

  1. Renormalization of a Lorentz invariant doubled worldsheet theory

    E-Print Network [OSTI]

    Nibbelink, Stefan Groot; Patalong, Peter

    2013-01-01

    Manifestly T-duality covariant worldsheet string models can be constructed by doubling the coordinate fields. We describe the underlying gauge symmetry of a recently proposed Lorentz invariant doubled worldsheet theory that makes half of the worldsheet degrees of freedom redundant. By shifting the Lagrange multiplier, that enforces the gauge fixing condition, the worldsheet action can be cast into various guises. We investigate the renormalization of this theory using a non-linear background/quantum split by employing a normal coordinate expansion adapted to the gauge-fixed theory. The propagator of the doubled coordinates contains a projection operator encoding that half of them do not propagate. We determine the doubled target space equations of motion by requiring one-loop Weyl invariance. Some of them are generalizations of the conventional sigma model beta-functions, while others seem to be novel to the doubled theory: In particular, a dilaton equation seems related to the strong constraint of double fie...

  2. New generation of double beta decay experiments: are there any limitations?

    E-Print Network [OSTI]

    A. S. Barabash

    2011-11-30

    New generation experiments on search for neutrinoless double beta decay with sensitivity to effective Majorana neutrino mass on the level $\\sim$ 3-5 meV is discussed. Possible restrictions at achievement of this purpose (possibility to produce big amount of enriched isotopes, possibility to reach very low background level, energy resolution and possible cost of experiments) are considered. It is shown that for realization of so ambitious project 10 tons (or more) of enriched isotope is required. Background index should be on the level $\\le$ 10$^{-5}-10^{-6}$ c/kg$\\cdot$ keV$\\cdot$ y. Besides, the energy resolution of the detector should be not worse than 1-2%. It is shown that $^{130}$TeO$_2$ low temperature bolometer looks as the most realistic candidate for such experiments. Under some conditions experiments with $^{76}$Ge, $^{100}$Mo and $^{136}$Xe can be realized too.

  3. A Segmented, Enriched N-type Germanium Detector for Neutrinoless Double Beta-Decay Experiments

    SciTech Connect (OSTI)

    Leviner, L.; Aalseth, Craig E.; Ahmed, M. W.; Avignone, F. T.; Back, Henning O.; Barabash, Alexander S.; Boswell, M.; De Braeckeleer, L.; Brudanin, V.; Chan, Yuen-Dat; Egorov, Viatcheslav; Elliott, Steven R.; Gehman, Victor M.; Hossbach, Todd W.; Kephart, Jeremy; Kidd, M. F.; Konovalov, S.; Lesko, Kevin; Li, Jingyi; Mei, Dongming; Mikhailov, S.; Miley, Harry S.; Radford, D. C.; Reeves, James H.; Sandukovsky, Viatcheslav; Umatov, Valdimir; Underwood, T. A.; Tornow, W.; Wu, Y. K.; Young, A.

    2014-01-21

    We present data characterizing the performance of the _rst segmented, N- type Ge detector, isotopically enriched to 85% 76Ge. This detector, based on the Ortec PT6x2 design and referred to as SEGA (Segmented, Enriched Germanium Assembly), was developed as a possible prototype for neutrinoless double beta-decay measurements by the Majorana collaboration. We present some of the general characteristics (including bias potential, efficiency, leakage current, and integral cross-talk) for this detector in its temporary cryostat. We also present an analysis of the resolution of the detector, and demonstrate that for all but two segments there is at least one channel that reaches the Majorana resolution goal below 4 keV FWHM at 2039 keV, and all channels are below 4.5 keV FWHM.

  4. Status of the CUORE and results from the CUORE-0 neutrinoless double beta decay experiments

    E-Print Network [OSTI]

    Sisti, M; Avignone, F T; Azzolini, O; Balata, M; Banks, T I; Bari, G; Beeman, J; Bellini, F; Bersani, A; Biassoni, M; Brofferio, C; Bucci, C; Cai, X Z; Camacho, A; Caminata, A; Canonica, L; Cao, X G; Capelli, S; Cappelli, L; Carbone, L; Cardani, L; Casali, N; Cassina, L; Chiesa, D; Chott, N; Clemenza, M; Copello, S; Cosmelli, C; Cremonesi, O; Creswick, R J; Cushman, J S; Dafinei, I; Dally, A; Datskov, V; Dell'Oro, S; Deninno, M; Di Domizio, S; di Vacri, M L; Drobizhev, A; Ejzak, L; Fang, D Q; Farach, H A; Faverzani, M; Fernandes, G; Ferri, E; Ferroni, F; Fiorini, E; Franceschi, M A; Freedman, S J; Fujikawa, B K; Giachero, A; Gironi, L; Giuliani, A; Gorla, P; Gotti, C; Gutierrez, T D; Haller, E E; Han, K; Heeger, K M; Hennings-Yeomans, R; Hickerson, K P; Huang, H Z; Kadel, R; Keppel, G; Kolomensky, Yu G; Li, Y L; Ligi, C; Lim, K E; Liu, X; Ma, Y G; Maiano, C; Maino, M; Martinez, M; Maruyama, R H; Mei, Y; Moggi, N; Morganti, S; Napolitano, T; Nastasi, M; Nisi, S; Nones, C; Norman, E B; Nucciotti, A; O'Donnell, T; Orio, F; Orlandi, D; Ouellet, J L; Pagliarone, C E; Pallavicini, M; Palmieri, V; Pattavina, L; Pavan, M; Pedretti, M; Pessina, G; Pettinacci, V; Piperno, G; Pira, C; Pirro, S; Pozzi, S; Previtali, E; Rosenfeld, C; Rusconi, C; Sala, E; Sangiorgio, S; Scielzo, N D; Smith, A R; Taffarello, L; Tenconi, M; Terranova, F; Tian, W D; Tomei, C; Trentalange, S; Ventura, G; Vignati, M; Wang, B S; Wang, H W; Wielgus, L; Wilson, J; Winslow, L A; Wise, T; Woodcraft, A; Zanotti, L; Zarra, C; Zhang, G Q; Zhu, B X; Zucchelli, S

    2015-01-01

    CUORE is a 741 kg array of TeO2 bolometers for the search of neutrinoless double beta decay of 130Te. The detector is being constructed at the Laboratori Nazionali del Gran Sasso, Italy, where it will start taking data in 2015. If the target background of 0.01 counts/keV/kg/y will be reached, in five years of data taking CUORE will have a 1 sigma half life sensitivity of 10E26 y. CUORE-0 is a smaller experiment constructed to test and demonstrate the performances expected for CUORE. The detector is a single tower of 52 CUORE-like bolometers that started taking data in spring 2013. The status and perspectives of CUORE will be discussed, and the first CUORE-0 data will be presented.

  5. Search for neutrinoless double beta decay with NEMO 3 experiment

    E-Print Network [OSTI]

    Zornitza Daraktchieva

    2009-01-18

    NEMO 3 experiment is designed to search for neutrinoless double beta decay. It is located in the Modane Underground Laboratory (LSM) and has been taking data since February 2003. The half- lives of two neutrino beta decay have been measured for seven isotopes. No evidence of neutrinoless double beta decay has been found. The limits on both the half-lives of the neutrinoless double beta decay and the corresponding Majorana effective masses are derived

  6. Neutrinoless Double Beta Decay in Supersymmetric Seesaw model

    E-Print Network [OSTI]

    Tai-Fu Feng; Xue-Qian Li; Yan-An Luo

    2002-09-26

    Inspired by the recent HEIDELBERG-MOSCOW double beta decay experiment, we discuss the neutrinoless double beta decay in the supersymmetric seesaw model. Our numerical analysis indicates that we can naturally explain the data of the observed neutrinoless double beta decay, as well as that of the solar and atmospheric neutrino experiments with at least one Majorana-like sneutrino of middle energy scale in the model.

  7. Radiochemical tracers as a mix diagnostic for the ignition double...

    Office of Scientific and Technical Information (OSTI)

    for the ignition double-shell capsule One of the most important challenges confronting laser-driven capsule implosion experiments will be a quantitative evaluation of the...

  8. Majorana Neutrino Masses from Neutrinoless Double Beta Decay and Cosmology

    E-Print Network [OSTI]

    V. Barger; K. Whisnant

    1999-04-08

    When three Majorana neutrinos describe the solar and atmospheric neutrino data via oscillations, a nonzero measurement of neutrinoless double beta ($0\

  9. Neutrinoless double beta decay can constrain neutrino dark matter

    E-Print Network [OSTI]

    V. Barger; S. L. Glashow; D. Marfatia; K. Whisnant

    2002-02-26

    We examine how constraints can be placed on the neutrino component of dark matter by an accurate measurement of neutrinoless double beta ($0\

  10. T-686: IBM Tivoli Integrated Portal Java Double Literal Denial...

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

    password) PLATFORM: Tivoli versions prior to 1.1.1.15. ABSTRACT: IBM Tivoli Integrated Portal Java Double Literal Denial of Service Vulnerability. reference LINKS: IBM ID: 1508061...

  11. 75 years of double beta decay: yesterday, today and tomorrow

    E-Print Network [OSTI]

    A. S. Barabash

    2011-01-24

    In this report I will briefly review the motivation and history of double beta decay search since the first consideration of two neutrino process (2$\\beta(2\

  12. DUF6 Project Doubles Production in 2013 | Department of Energy

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

    year 2013 goal by converting 13,679 metric tons of depleted uranium hexafluoride (DUF6), more than doubling production a year earlier. EM's Portsmouth Paducah Project Office...

  13. Neutron Interactions in the CUORE Neutrinoless Double Beta Decay...

    Office of Scientific and Technical Information (OSTI)

    Interactions in the CUORE Neutrinoless Double Beta Decay Experiment Dolinski, M J 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS;...

  14. The MAJORANA DEMONSTRATOR: A Search for Neutrinoless Double-beta...

    Office of Scientific and Technical Information (OSTI)

    Conference: The MAJORANA DEMONSTRATOR: A Search for Neutrinoless Double-beta Decay of Germanium-76 Citation Details In-Document Search Title: The MAJORANA DEMONSTRATOR: A Search...

  15. Systematics of quarkonium production at the LHC and double parton...

    Office of Scientific and Technical Information (OSTI)

    Systematics of quarkonium production at the LHC and double parton fragmentation Citation Details In-Document Search Title: Systematics of quarkonium production at the LHC and...

  16. Half-lives of Double $?^+$-decay with Two Neutrinos

    E-Print Network [OSTI]

    Yuejiao Ren; Zhongzhou Ren

    2015-01-07

    Nuclear double $\\beta ^-$-decays with two neutrinos were observed for many years and a systematic law describing the relation between their half-lives and decay energies was also proposed recently [Phys. Rev. C89, 064603 (2014)]. However, double $\\beta ^+$-decay ($\\beta ^+\\beta^+)$ with emission of both two positrons and two neutrinos has not been observed up to date. In this article, we perform a systematic analysis on the candidates of double $\\beta ^+$-decay, based on the 2012 nuclear mass table. Eight nuclei are found to be the good candidates for double $\\beta ^+$-decay and their half-lives are predicted according to the generalization of the systematic law to double $\\beta ^+$-decay. As far as we know, there is no theoretical result on double $\\beta ^+$-decay of nucleus $^{154}Dy$ and our result is the first prediction on this nucleus. This is also the first complete research on eight double $\\beta ^+$-decay candidates based on the available data of nuclear masses. It is expected that the calculated half-lives of double $\\beta ^+$-decay in this article will be useful for future experimental search of double $\\beta ^+$-decay.

  17. High-field double-pancake superconducting coils and a method of winding

    DOE Patents [OSTI]

    Materna, P.A.

    1984-01-31

    A double-pancake coil having first and second pancakes may comprise a plurality of conductor means, each conductor means having a different grade and having one or more conductors, wherein each pancake of said double-pancake coil is comprised of inner and outer turns; wherein said inner turns are comprised of at least one of said conductor means wound about an axis and nested within one another; wherein said outer turns are comprised of said inner conductor means and at least one other conductor means co-wound about said inner turns and nested within one another; wherein each of said conductor means is wound along said axis from said first pancake to said second pancake at a different turn.

  18. The nature of massive neutrinos and multiple mechanisms in neutrinoless double beta decay

    E-Print Network [OSTI]

    Aurora Meroni

    2015-10-19

    Determining the nature -Dirac or Majorana- of massive neutrinos is one of the most pressing and challenging problems in the field of neutrino physics. We discuss how one can possibly extract information on the couplings, if any, which might be involved in neutrinoless double beta-decay using a multi-isotope approach. We investigate as well the potential of combining data on the half-lives of nuclides which largely different Nuclear Matrix Elements such as $^{136}$Xe and of one or more of the four nuclei $^{76}$Ge, $^{82}$Se, $^{100}$Mo and $^{130}$Te, for discriminating between different pairs of non-interfering or interfering mechanisms of neutrinoless double beta-decay. The case studies do not extend to the evaluation of the theoretical uncertainties of the results, due to the nuclear matrix elements calculations and other causes.

  19. Double-regge exchange limit for the ?p? K?K?p reaction

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

    Shi, M.; Danilkin, I. V.; Fernández-Ramírez, C.; Mathieu, V.; Pennington, M. R.; Schott, D.; Szczepaniak, A. P.

    2015-02-01

    We apply the generalized Veneziano model (B? model) in the double-Regge exchange limit to the ?p?K?K?p reaction. Four different cases defined by the possible combinations of the signature factors of leading Regge exchanges ((K*,a?/f?), (K*,?/?), (K*?,a?/f?), and (K*?,?/?)) have been simulated through the Monte Carlo method. Suitable event candidates for the double-Regge exchange high-energy limit were selected employing Van Hove plots as a better alternative to kinematical cuts in the K?K?p Dalitz plot. In this way we predict and analyze the double-Regge contribution to the K?K?p Dalitz plot, which constitutes one of the major backgrounds in the search for strangeonia,more »hybrids and exotics using ?p?K?K?p reaction. We expect that data currently under analysis, and that to come in the future, will allow verification of the double-Regge behavior and a better assessment of this component of the amplitude.« less

  20. Detailed diagnosis of a double-shell collision under realistic implosion conditions

    SciTech Connect (OSTI)

    Kyrala, G.A.; Gunderson, M.A.; Delamater, N.D.; Haynes, D.A.; Wilson, D.C.; Guzik, J.A.; Klare, K.A. [Los Alamos National Laboratory, P.O. Box 1663, MS E-526, Los Alamos, New Mexico 87544 (United States)

    2006-05-15

    Double-shell implosions provide a noncryogenic path to inertial confinement fusion. In the double-shell target, the energy is absorbed in an outer shell that is accelerated inward and collides with an inner shell that implodes against the deuterium fuel. Symmetric collision of the shells requires that the shells be illuminated and built symmetrically. In reality, the targets are complicated and the construction is not symmetric, due to the seam that our current assembly method requires. Using the Omega laser [R. T. Boehly et al., Opt. Comm. 133, 495 (1997)], an illumination strategy was designed that uses 40 beams in an offset geometry, leaving 20 beams to perform radiography from two different directions. This places a significant nonsymmetric illumination challenge that may not exist in final targets shot on the National Ignition Facility. This paper presents a measurement of the time history of a collision of two shells in a double-shell capsule, briefly reviews the illumination geometry, gives the results of the measurements of the trajectory and symmetry of the outer and inner shells, shows the effect of a seam on the inner shell implosion, and compares the results with calculations. The measurement of such a collision in a spherical geometry is of great interest to the study of double-shell implosions as well as code validation.

  1. Double Regge exchange Limit for the ?p? K?K?p Reaction

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

    Shi, M. [Peking Univ., Beijing (China); Danilkin, I. V. [Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Fernández-Ramírez, C. [Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Mathieu, V. [Indiana Univ., IN (United States); Pennington, M. R. [Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Schott, D. [George Washington Univ., Washington, DC (United States); Szczepaniak, A. P. [Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

    2015-02-01

    We apply the generalized Veneziano model (B5 model) in the double-Regge exchange limit to the ?p?K+K?p reaction. Four different cases defined by the possible combinations of the signature factors of leading Regge exchanges ((K?,a2/f2), (K?,?/?), (K?2,a2/f2), and (K?2,?/?)) have been simulated through the Monte Carlo method. Suitable event candidates for the double-Regge exchange high-energy limit were selected employing \\textit{Van Hove} plots as a better alternative to kinematical cuts in the K+K?p Dalitz plot. In this way we predict and analyze the double-Regge contribution to the K+K?p Dalitz plot, which constitutes one of the major backgrounds in the search for strangeonia, hybrids and exotics using ?p?K+K?p reaction. We expect that data currently under analysis, and that to come in the future, will allow verification of the double-Regge behavior and a better assessment of this component of the amplitude.

  2. Double-Regge Exchange Limit for the $?p\\rightarrow K^+K^-p$ Reaction

    E-Print Network [OSTI]

    M. Shi; I. V. Danilkin; C. Fernández-Ramírez; V. Mathieu; M. R. Pennington; D. Schott; A. P. Szczepaniak

    2014-11-23

    We apply the generalized Veneziano model ($B_5$ model) in the double-Regge exchange limit to the $\\gamma p \\to K^+ K^- p$ reaction. Four different cases defined by the possible combinations of the signature factors of leading Regge exchanges (($K^*,a_2/f_2$), ($K^*,\\rho/\\omega$), ($K_2^*,a_2/f_2$), and ($K_2^*,\\rho/\\omega$)) have been simulated through the Monte Carlo method. Suitable event candidates for the double-Regge exchange high-energy limit were selected employing \\textit{Van Hove} plots as a better alternative to kinematical cuts in the $K^+ K^- p$ Dalitz plot. In this way we predict and analyze the double-Regge contribution to the $K^+ K^- p$ Dalitz plot, which constitutes one of the major backgrounds in the search for strangeonia, hybrids and exotics using $\\gamma p\\rightarrow K^+K^-p$ reaction. We expect that data currently under analysis, and that to come in the future, will allow verification of the double-Regge behavior and a better assessment of this component of the amplitude.

  3. Spawning and abundance of fall chinook salmon (Oncorhynchus tshawytscha) in the Hanford Reach of the Columbia River, 1948--1988

    SciTech Connect (OSTI)

    Dauble, D.D.; Watson, D.G.

    1990-03-01

    The Hanford Reach of the Columbia River provides the only major spawning habitat for the upriver bright (URB) race of fall chinook salmon in the mainstem Columbia River. Hanford Site biologists have conducted aerial surveys of spawning salmon in the Hanford Reach since 1948. This report summarizes data on fall chinook salmon spawning in the Hanford Reach and presents a discussion of factors that may affect population trends. Most data are limited to fisheries agency reports and other working documents. Fisheries management practices in the Columbia River system have changed rapidly over the last decade, particularly under requirements of the Pacific Northwest Power Planning and Conservation Act of 1980. New information has been generated and included in this report. 75 refs., 17 figs., 11 tabs.

  4. Double-difference waveform inversion: Feasibility and robustness study with pressure data

    E-Print Network [OSTI]

    Yang, Di

    Time-lapse seismic data are widely used to monitor reservoir changes. Qualitative comparisons between baseline and monitor data sets or image volumes provide information about fluid and pressure effects within the reservoir ...

  5. Flammable gas double shell tank expert elicitation presentations (Part A and Part B)

    SciTech Connect (OSTI)

    Bratzel, D.R.

    1998-04-17

    This document is a compilation of presentation packages and white papers for the Flammable Gas Double Shell Tank Expert Elicitation Workshop {number_sign}2. For each presentation given by the different authors, a separate section was developed. The purpose for issuing these workshop presentation packages and white papers as a supporting document is to provide traceability and a Quality Assurance record for future reference to these packages.

  6. Double-Slit Experiments with Microwave Billiards

    E-Print Network [OSTI]

    S. Bittner; B. Dietz; M. Miski-Oglu; P. Oria Iriarte; A. Richter; F. Schäfer

    2011-07-27

    Single and double-slit experiments are performed with two microwave billiards with the shapes of a rectangle, respectively, a quarter stadium. The classical dynamics of the former is regular, that of the latter is chaotic. Microwaves can leave the billiards via slits in the boundary, forming interference patterns on a screen. The aim is to determine the effect of the billiard dynamics on their structure. For this the development of a method for the construction of a directed wave packet by means of an array of multiple antennas was crucial. The interference patterns show a sensitive dependence not only on the billiard dynamics but also on the initial position and direction of the wave packet.

  7. Double Shell Tank (DST) Utilities Specification

    SciTech Connect (OSTI)

    SUSIENE, W.T.

    2000-04-27

    This specification establishes the performance requirements and provides the references to the requisite codes and standards to he applied during the design of the Double-Shell Tank (DST) Utilities Subsystems that support the first phase of waste feed delivery (WFD). The DST Utilities Subsystems provide electrical power, raw/potable water, and service/instrument air to the equipment and structures used to transfer low-activity waste (LAW) and high-level waste (HLW) to designated DST staging tanks. The DST Utilities Subsystems also support the equipment and structures used to deliver blended LAW and HLW feed from these staging tanks to the River Protection Project (RPP) Privatization Contractor facility where the waste will be immobilized. This specification is intended to be the basis for new projects/installations. This specification is not intended to retroactively affect previously established project design criteria without specific direction by the program.

  8. Double-rotor rotary engine and turbine

    SciTech Connect (OSTI)

    Lin, A.S.

    1990-04-03

    This patent describes a double-rotor engine. It comprises: a base; a housing rotatably mounted to the base and forming a radial cylinder; an output shaft rotatably mounted concentric with the housing and having an arm rigidly extending therefrom within the housing; a piston slidingly engaging the cylinder and forming a combustion chamber with the cylinder; means for admitting a fuel-air mixture into the cylinder; means for releasing combustion products from the cylinder following operation of the expanding means; turbine means operatively connected between the base and the housing, the turbine means providing a torque reaction against the housing in response to flow of the combustion products from the releasing means; and stop means on the shaft for limiting the relative movement between the shaft and the housing.

  9. Heterotic $?$'-corrections in Double Field Theory

    E-Print Network [OSTI]

    Oscar A. Bedoya; Diego Marques; Carmen Nunez

    2014-12-15

    We extend the generalized flux formulation of Double Field Theory to include all the first order bosonic contributions to the $\\alpha '$ expansion of the heterotic string low energy effective theory. The generalized tangent space and duality group are enhanced by $\\alpha'$ corrections, and the gauge symmetries are generated by the usual (gauged) generalized Lie derivative in the extended space. The generalized frame receives derivative corrections through the spin connection with torsion, which is incorporated as a new degree of freedom in the extended bein. We compute the generalized fluxes and find the Riemann curvature tensor with torsion as one of their components. All the four-derivative terms of the action, Bianchi identities and equations of motion are reproduced. Using this formalism, we obtain the first order $\\alpha'$ corrections to the heterotic Buscher rules. The relation of our results to alternative formulations in the literature is discussed and future research directions are outlined.

  10. Neutrinoless Double Beta Decay in Gauge Theories

    E-Print Network [OSTI]

    J. D. Vergados

    1999-07-12

    Neutrinoless double beta decay is a very important process both from the particle and nuclear physics point of view. Its observation will severely constrain the existing models and signal that the neutrinos are massive Majorana particles. From the elementary particle point of view it pops up in almost every model. In addition to the traditional mechanisms, like the neutrino mass, the admixture of right handed currents etc, it may occur due to the R-parity violating supersymmetric (SUSY) interactions. From the nuclear physics point of view it is challenging, because: 1) The relevant nuclei have complicated nuclear structure. 2) The energetically allowed transitions are exhaust a small part of all the strength. 3) One must cope with the short distance behavior of the transition operators, especially when the intermediate particles are heavy (eg in SUSY models). Thus novel effects, like the double beta decay of pions in flight between nucleons, have to be considered. 4) The intermediate momenta involved are about 100 MeV. Thus one has to take into account possible momentum dependent terms in the nucleon current. We find that, for the mass mechanism, such modifications of the nucleon current for light neutrinos reduce the nuclear matrix elements by about 25 per cent, almost regardless of the nuclear model. In the case of heavy neutrinos the effect is much larger and model dependent. Taking the above effects into account, the available nuclear matrix elements for the experimentally interesting nuclei A = 76, 82, 96, 100, 116, 128, 130, 136 and 150 and the experimental limits on the life times we have extracted new stringent limits on the average neutrino mass and on the R-parity violating coupling for various SUSY models.

  11. Smooth double critical state theory for type-II superconductors

    E-Print Network [OSTI]

    H. S. Ruiz; A. Bad\\'\\ia-Majós

    2010-05-30

    Several aspects of the general theory for the critical states of a vortex lattice and the magnetic flux dynamics in type-II superconductors are examined by a direct variational optimisation method and widespread physical principles. Our method allows to unify a number of conventional models describing the complex vortex configurations in the critical state regime. Special attention is given to the discussion of the relation between the flux-line cutting mechanism and the depinning threshold limitation. This is done by using a smooth double critical state concept which incorporates the so-called isotropic, elliptical, T and CT models as well-defined limits of our general treatment. Starting from different initial configurations for a superconducting slab in a 3D magnetic field, we show that the predictions of the theory range from the collapse to zero of transverse magnetic moments in the isotropic model, to nearly force free configurations in which paramagnetic values can arbitrarily increase with the applied field for magnetically anisotropic current voltage laws. Noteworthily, the differences between the several model predictions are minimal for the low applied field regime.

  12. Slow Rise and Partial Eruption of a Double-Decker Filament. I Observations and Interpretation

    E-Print Network [OSTI]

    Liu, Rui; TÖrÖk, Tibor; Liu, Chang; Titov, Viacheslav S; Lionello, Roberto; Linker, Jon A; Wang, Haimin

    2012-01-01

    We study an active-region dextral filament which was composed of two branches separated in height by about 13 Mm. This "double-decker" configuration sustained for days before the upper branch erupted with a GOES-class M1.0 flare on 2010 August 7. Analyzing this evolution, we obtain the following main results. 1) During hours before the eruption, filament threads within the lower branch were observed to intermittently brighten up, lift upward, and then merge with the upper branch. The merging process contributed magnetic flux and current to the upper branch, resulting in its quasi-static ascent. 2) This transfer might serve as the key mechanism for the upper branch to lose equilibrium by reaching the limiting flux that can be stably held down by the overlying field or by reaching the threshold of the torus instability. 3) The erupting branch first straightened from a reverse S shape that followed the polarity inversion line and then writhed into a forward S shape. This shows a transfer of left-handed helicity ...

  13. Double-nonlinear metamaterials Rongcao Yang1,2,a

    E-Print Network [OSTI]

    Double-nonlinear metamaterials Rongcao Yang1,2,a and Ilya V. Shadrivov1 1 Nonlinear Physics Centre 10 December 2010 We study a double-nonlinear metamaterial composed of a mixture of both nonlinear electric and nonlinear magnetic resonators. We predict multistable behavior in such metamaterial

  14. Countering Trusting Trust through Diverse Double-Compiling

    E-Print Network [OSTI]

    Sandhu, Ravi

    1 Countering Trusting Trust through Diverse Double-Compiling David A. Wheeler February 28, 2006 · Inadequate solutions & related work · Solution: Diverse double-compiling (DDC) ­ What it is ­ Why it works & broader implications 3 Trusting trust attack Compiler executable (malicious) Critical program (malicious

  15. Significant neutrinoless double beta decay with quasi-Dirac neutrinos

    E-Print Network [OSTI]

    Pei-Hong Gu

    2012-09-13

    A significant signal of neutrinoless double beta decay can be consistent with the existence of light quasi-Dirac neutrinos. To demonstrate this possibility, we consider a realistic model where the neutrino masses and the neutrinoless double beta decay can be simultaneously generated after a Peccei-Quinn symmetry breaking.

  16. Designing Truthful Spectrum Double Auctions with Local Markets

    E-Print Network [OSTI]

    Li, Baochun

    Designing Truthful Spectrum Double Auctions with Local Markets Wei Wang, Student Member, IEEE, Ben pieces in the market. We design a spectrum double auction that incorporates such locality in spectrum markets, while keeping the auction economically robust and computationally efficient. Our designs

  17. Maximal Matching for Double Auction Dengji Zhao1,2

    E-Print Network [OSTI]

    Zhang, Dongmo

    the problem of mechanism design for a double auc- tion market where multiple buyers and sellers buy and sell Design) platform, we show with experiments that the new matching method not only increases market price). Similar to the design of other market mechanisms, the main concerns of double auction design

  18. DoubleSpeed Safe Prime Generation David Naccache

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    prime generation is thus divided by two at the cost of generating primes of size k or k + 1 with equalDouble­Speed Safe Prime Generation David Naccache Gemplus Card International Applied Research method for doubling the speed of safe prime generation. The method is particularly suited to settings

  19. Double-Speed Safe Prime Generation David Naccache

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    at the cost of generating primes of size k or k + 1 with equal probability. The generation of RSA moduliDouble-Speed Safe Prime Generation David Naccache Gemplus Card International Applied Research method for doubling the speed of safe prime generation. The method is particularly suited to settings

  20. technology offer HPC/UHPC double wall elements

    E-Print Network [OSTI]

    Arnold, Anton

    buildings and towers like wind turbines, power plants or cooling towers. Fig. 1: UHPC double wall element to 20-45 mm in an easy and cost efficient way. Background Double wall elements are precast reinforced · Savings in material and weight · Savings in transport and crane costs · Dense structure of the precast

  1. Matched slow pulses using double electromagnetically induced transparency

    E-Print Network [OSTI]

    Lvovsky, Alexander

    Matched slow pulses using double electromagnetically induced transparency Andrew MacRae,* Geoff, 2008 We implement double electromagnetically induced transparency (DEIT) in rubidium vapor using Optical Society of America OCIS codes: 270.1670, 270.5585, 190.5530. Electromagnetically induced

  2. New Stream-reach Development (NSD): A Comprehensive Assessment of Hydropower Energy Potential in the United States Final Report

    SciTech Connect (OSTI)

    Kao, Shih-Chieh

    2014-04-25

    The U.S. Department of Energy (DOE) Water Power Program tasked Oak Ridge National Laboratory with evaluating the new stream-reach development (NSD) resource potential of more than 3 million U.S. streams in order to help individuals and organizations evaluate the feasibility of developing new hydropower sources in the United States.

  3. Influence of Headwater Streams on Downstream Reaches in Forested Lee H. MacDonald and Drew Coe

    E-Print Network [OSTI]

    MacDonald, Lee

    it difficult to rigorously link upstream inputs and anthropogenic activities to the condition of downstreamInfluence of Headwater Streams on Downstream Reaches in Forested Areas Lee H. MacDonald and Drew of the streamflow in downstream areas. Headwater streams also provide other important constituents to downstream

  4. Abstract. Learning to make reaching movements in force elds was used as a paradigm to explore the system

    E-Print Network [OSTI]

    Shadmehr, Reza

    to the surrounding electric ®eld and subtract it from the measured ®eld in order to estimate the external world found that control via a supra-spinal system that utilized an adaptive inverse model resulted found that as subjects learned to make reaching movements, adaptation rates for the forward and inverse

  5. Light Pollution and the City of "It is indeed a feeble light that reaches us from the starry

    E-Print Network [OSTI]

    Light Pollution and the City of Armagh "It is indeed a feeble light that reaches us from the starry is Light Pollution? Many of us have been dazzled at one time or another by an intense light source or shopping centre. These are but some of the adverse effects of `light pollution': the inadvertent

  6. Arm Position Constraints During Pointing and Reaching in 3-D Space C.C.A.M. GIELEN,1

    E-Print Network [OSTI]

    Gielen, C.C.A.M.

    Arm Position Constraints During Pointing and Reaching in 3-D Space C.C.A.M. GIELEN,1 E. J, and S.F.W. Neg- imposed. Even worse, torsion of the shoulder or eye may gers. Arm position constraints. J. Neurophysiol. 78: 660­673, 1997. Arm movements in to the rotations in the shoulder or the eye. 3

  7. Quanta FEG 200 *Always wear lint and powder free clean room gloves when reaching into the specimen

    E-Print Network [OSTI]

    Quanta FEG 200 *Always wear lint and powder free clean room gloves when reaching into the specimen. Lower the stage manually using the Z adjustments on the front door if necessary). e. Click the Pump and click the Pump button to pump to High Vacuum. To Start-up the System from Complete Shutdown 1) Push

  8. As corn-based biofuels reach their practical limits, advanced algae-based biofuels are poised to supply

    E-Print Network [OSTI]

    Reisslein, Martin

    SEMTE abstract As corn-based biofuels reach their practical limits, advanced algae-based biofuels of Energy, General Electric, Algenol Biofuels, and Southern Company. Currently a post-doctoral fellow working for Algenol Biofuels, Dr. Lively is expanding his expertise in gas and liquid separations

  9. How to Reach ISI Delhi While booking an auto or a taxi to ISI, mention two wellknown landmarks: Qutab Hotel

    E-Print Network [OSTI]

    Bandyopadhyay, Antar

    How to Reach ISI Delhi While booking an auto or a taxi to ISI, mention two wellknown landmarks: Qutab Hotel (ISI is about 300 meters away from the Qutab Hotel) or Katwaria Sarai (which is the locality where ISI belongs and is directly opposite to the Katwaria Sarai bus stop). For the exact location click

  10. GK-12 Math at Doolen Middle SchoolDavid Herzog My main goals were to learn how to reach a

    E-Print Network [OSTI]

    Lega, Joceline

    GK-12 Math at Doolen Middle SchoolDavid Herzog Goals My main goals were to learn how to reach a wider audience of math students, to have a better understanding of the educational sys- tem, and to enjoy interacting with a non-math crowd. Big Surprise For an expert in the field of math, I thought

  11. Could a 1755-Like Tsunami Reach the French Atlantic Coastline? Constraints from Twentieth Century Observations and Numerical Modeling

    E-Print Network [OSTI]

    Madariaga, Raúl

    Could a 1755-Like Tsunami Reach the French Atlantic Coastline? Constraints from Twentieth Century and R. MADARIAGA 3 Abstract--The tsunami generated by the 1 November, 1755 earthquake off the coast the French coastline, we conducted a study to search for signs of the tsunami in historical records from all

  12. CAUSE AND EXTENT OF THE EXTREME RADIO FLUX DENSITY REACHED BY THE SOLAR FLARE OF 2006 DECEMBER 06

    E-Print Network [OSTI]

    are the reports of widespread effects on Global Positioning System (GPS) receivers. The potential for such effectsCAUSE AND EXTENT OF THE EXTREME RADIO FLUX DENSITY REACHED BY THE SOLAR FLARE OF 2006 DECEMBER 06 Dale E. Gary Center for Solar-Terrestrial Research, Physics Department, New Jersey Institute

  13. Diffractive Double-Elastic Production of $?$' and $?_c$ in the $p p \\to p X p$ Reaction

    E-Print Network [OSTI]

    Antoni Szczurek

    2006-08-30

    I discuss double-diffractive (double-elastic) production of the $\\eta'$ and $\\eta_c$ mesons in the $pp \\to p X p$ reaction within the formalism of unintegrated gluon distribution functions (UGDF). The contribution of $\\gamma^* \\gamma^* \\to \\eta'$ fusion is estimated. The distributions in the Feynman $x_F$ (or rapidity), transferred four-momenta squared between initial and final protons ($t_1$, $t_2$) and azimuthal angle difference between outgoing protons ($\\Phi$) are calculated and discussed. The results are compared with the WA102 data. Predictions at higher energies are presented.

  14. Neutrinoless double-beta decay with three or four neutrino mixing

    E-Print Network [OSTI]

    C. Giunti

    1999-08-27

    Considering the scheme with mixing of three neutrinos and a mass hierarchy that can accommodate the results of solar and atmospheric neutrino experiments, it is shown that the results of solar neutrino experiments imply a lower bound for the effective Majorana mass in neutrinoless double-beta decay, under the natural assumptions that massive neutrinos are Majorana particles and there are no unlikely fine-tuned cancellations among the contributions of the different neutrino masses. Considering the four-neutrino schemes that can accommodate also the results of the LSND experiment, it is shown that only one of them is compatible with the results of neutrinoless double-beta decay experiments and with the measurement of the abundances of primordial elements produced in Big-Bang Nucleosynthesis. It is shown that in this scheme, under the assumptions that massive neutrinos are Majorana particles and there are no cancellations among the contributions of the different neutrino masses, the results of the LSND experiment imply a lower bound for the effective Majorana mass in neutrinoless double-beta decay.

  15. First results on neutrinoless double beta decay of Te-130 with the calorimetric cuoricino experiment

    E-Print Network [OSTI]

    2003-01-01

    Results on Neutrinoless Double Beta Decay of 130 Te with theEvidence for Neutrinoless Double Beta Decay” arXiv:hep-on “Evidence for neutrinoless double beta decay”- arXiv:hep-

  16. An Investigation and Characterization of Metal Foam Filled Double-Pipe Heat Exchangers

    E-Print Network [OSTI]

    Chen, Xi

    2014-01-01

    a metal foam filled double-pipe heat exchanger: a) Pressurein a metal foam filled double-pipe heat exchanger witha plain double-pipe heat exchanger: a) Total heat transfer

  17. Transmission spectra of a double-clad fibre structure under bending

    SciTech Connect (OSTI)

    Zlodeev, I V; Ivanov, Oleg V

    2013-06-30

    We have studied a fibre-optic structure whose operation relies on conversion of core and cladding modes that are coupled across the interface between two fibres differing in refractive index profile. The structure contains a section of an SM630 double-clad, small-core, single-mode fibre inserted between two SMF-28 standard fibres. We have measured the transmission spectrum of the structure when the SM630 fibre was bent and analysed the mode structure of the double-clad fibre and the origin of dips in its transmission spectrum. The resonance dips have been found to shift to longer wavelengths with increasing fibre curvature. We have evaluated the shift as a function of the length of the inserted fibre, its bend direction and the nature of the input fibre. (fiber optics)

  18. High Contrast Ramsey Fringes with Coherent-Population-Trapping Pulses in a Double Lambda Atomic System

    SciTech Connect (OSTI)

    Zanon, T.; Guerandel, S.; Clercq, E. de; Holleville, D.; Dimarcq, N.; Clairon, A. [SYRTE, Observatoire de Paris, 61 Avenue de l'Observatoire, 75014 Paris (France)

    2005-05-20

    We report the observation of Raman-Ramsey fringes using a double lambda scheme creating coherent population trapping in an atomic ensemble combined with pulsed optical radiations. The observation was made in a Cs vapor mixed with N{sub 2} buffer gas in a closed cell. The double lambda scheme is created with lin perpendicular lin polarized laser beams leading to higher contrast than the usual simple lambda scheme. The pulsed trapping technique leads to narrow fringe widths scaling as 1/(2T) with high contrasts which are no longer limited by the saturation effect. This technique operates in a different way from the classical Ramsey sequence: the signal is done by applying a long trapping pulse to prepare the atomic state superposition, and fringe detection is accomplished by optical transmission during a short second trapping pulse without any perturbation of the dark state.

  19. Ablation enhancement of silicon by ultrashort double-pulse laser ablation

    SciTech Connect (OSTI)

    Zhao, Xin; Shin, Yung C. [Center for Laser-Based Manufacturing, School of Mechanical Engineering, Purdue University, West Lafayette, Indiana 47907 (United States)

    2014-09-15

    In this study, the ultrashort double-pulse ablation of silicon is investigated. An atomistic simulation model is developed to analyze the underlying physics. It is revealed that the double-pulse ablation could significantly increase the ablation rate of silicon, compared with the single pulse ablation with the same total pulse energy, which is totally different from the case of metals. In the long pulse delay range (over 1?ps), the enhancement is caused by the metallic transition of melted silicon with the corresponding absorption efficiency. At ultrashort pulse delay (below 1?ps), the enhancement is due to the electron excitation by the first pulse. The enhancement only occurs at low and moderate laser fluence. The ablation is suppressed at high fluence due to the strong plasma shielding effect.

  20. Spin transport and spin polarization properties in double-stranded DNA

    SciTech Connect (OSTI)

    Simchi, Hamidreza; Esmaeilzadeh, Mahdi Mazidabadi, Hossein

    2013-11-21

    We study the spin-dependent electron transport through a double-stranded DNA (dsDNA) using the Bogoliubov-de Gennes equations and non-equilibrium Green's function method. We calculate the spin-dependent electron conductance and spin-polarization for different lengths, helix angles, twist angles of dsDNA, the environment-induced dephasing factors, and hopping integral. It is shown that the conductance decreases by increasing the length and dephasing factor. Also, we show that the spin-polarization depends on the helical symmetry and the length of DNA. It is shown that the double-stranded DNA can act as a perfect spin filter. Finally, we show that the sign of spin polarization can be inverted from +1 (?1) to ?1 (+1) for some values of hopping integral.

  1. Coronal electron confinement by double layers

    SciTech Connect (OSTI)

    Li, T. C.; Drake, J. F.; Swisdak, M.

    2013-12-01

    In observations of flare-heated electrons in the solar corona, a longstanding problem is the unexplained prolonged lifetime of the electrons compared to their transit time across the source. This suggests confinement. Recent particle-in-cell (PIC) simulations, which explored the transport of pre-accelerated hot electrons through ambient cold plasma, showed that the formation of a highly localized electrostatic potential drop, in the form of a double layer (DL), significantly inhibited the transport of hot electrons. The effectiveness of confinement by a DL is linked to the strength of the DL as defined by its potential drop. In this work, we investigate the scaling of the DL strength with the hot electron temperature by PIC simulations and find a linear scaling. We demonstrate that the strength is limited by the formation of parallel shocks. Based on this, we analytically determine the maximum DL strength, and also find a linear scaling with the hot electron temperature. The DL strength obtained from the analytic calculation is comparable to that from the simulations. At the maximum strength, the DL is capable of confining a significant fraction of hot electrons in the source.

  2. Double-duct liquid metal magnetohydrodynamic engine

    DOE Patents [OSTI]

    Haaland, Carsten M. (Oak Ridge, TN)

    1995-01-01

    An internal combustion, liquid metal (LM) magnetohydrodynamic (MHD) engine and an alternating current (AC) magnetohydrodynamic generator, are used in combination to provide useful AC electric energy output. The engine design has-four pistons and a double duct configuration, with each duct containing sodium potassium liquid metal confined between free pistons located at either end of the duct. The liquid metal is forced to flow back and forth in the duct by the movement of the pistons, which are alternatively driven by an internal combustion process. In the MHD generator, the two LM-MHD ducts pass in close proximity through a Hartmann duct with output transformer. AC power is produced by operating the engine with the liquid metal in the two generator ducts always flowing in counter directions. The amount of liquid metal maintained in the ducts may be varied. This provides a variable stroke length for the pistons. The engine/generator provides variable AC power at variable frequencies that correspond to the power demands of the vehicular propulsion. Also the engine should maintain nearly constant efficiency throughout the range of power usage. Automobiles and trucks could be powered by the invention, with no transmission or power converter devices being required.

  3. Double-duct liquid metal magnetohydrodynamic engine

    DOE Patents [OSTI]

    Haaland, Carsten M. (Oak Ridge, TN)

    1997-01-01

    An internal combustion, liquid metal (LM) magnetohydrodynamic (MHD) engine and an alternating current (AC) magnetohydrodynamic generator, are used in combination to provide useful AC electric energy output. The engine design has four pistons and a double duct configuration, with each duct containing sodium potassium liquid metal confined between free pistons located at either end of the duct. The liquid metal is forced to flow back and forth in the duct by the movement of the pistons, which are alternatively driven by an internal combustion process. In the MHD generator, the two LM-MHD ducts pass in close proximity through a Hartmann duct with output transformer. AC power is produced by operating the engine with the liquid metal in the two generator ducts always flowing in counter directions. The amount of liquid metal maintained in the ducts may be varied. This provides a variable stroke length for the pistons. The engine/generator provides variable AC power at variable frequencies that correspond to the power demands of the vehicular propulsion. Also the engine should maintain nearly constant efficiency throughout the range of power usage. Automobiles and trucks could be powered by the invention, with no transmission or power converter devices being required.

  4. Pionic contribution to neutrinoless double beta decay

    SciTech Connect (OSTI)

    Vergados, J. D. [Physics Department, University of Ioannina, Ioannina, GR 451 10 (Greece); Theory Division, CERN, Geneva (Switzerland); Faessler, Amand [Institute fuer Theoretische Physik, Universitaet Tuebingen (Germany); Toki, H. [RCNP, Osaka University, Osaka, 567-0047 (Japan)

    2010-02-01

    It is well known that neutrinoless double decay is going to play a crucial role in settling the neutrino properties, which cannot be extracted from the neutrino oscillation data. It is, in particular, expected to settle the absolute scale of neutrino mass and determine whether the neutrinos are Majorana particles, i.e. they coincide with their own antiparticles. In order to extract the average neutrino mass from the data, one must be able to estimate the contribution of all possible high mass intermediate particles. The latter, which occur in practically all extensions of the standard model, can, in principle, be differentiated from the usual mass term, if data from various targets are available. One, however, must first be able to reliably calculate the corresponding nuclear matrix elements. Such calculations are extremely difficult since the effective transition operators are very short ranged. For such operators processes like pionic contributions, which are usually negligible, turn out to be dominant. We study such an effect in a nonrelativistic quark model for the pion and the nucleon.

  5. Report: Global Share of Renewable Energy Could Double by 2030

    Broader source: Energy.gov [DOE]

    The global renewable energy share can reach and exceed 30% by 2030 at no extra cost, according to the International Renewable Energy Agency.

  6. Experimental research of double beta decay of atomic nuclei

    E-Print Network [OSTI]

    F. A. Danevich

    2011-12-26

    Results of several double beta decay experiments, performed with the help of low background crystal scintillators, are presented. In particular, the half-life value of the two-neutrino double beta decay of 116-Cd has been measured as 2.9 10^{19} yr, and the new half-life limit on the neutrinoless double beta decay of 116-Cd has been established as >1.7 10^{23} yr at 90%, which corresponds to a restriction on the neutrino mass <1.7 eV. New half-life bounds on the level of 10^{17}-10^{21} yr were set for double beta processes in 64-Zn, 70-Zn, 106-Cd, 108-Cd, 114-Cd, 136-Ce, 138-Ce, 142-Ce, 160-Gd, 180-W, and 186-W by using low-background CdWO4, GSO, and ZnWO4 crystal scintillators. The claim of discovery of the neutrinoless double beta decay of 76-Ge [Mod. Phys. Lett. A 16 (2001) 2409] was analyzed. The demands of the future high sensitivity double beta decay experiments, aiming to observe the neutrinoless double beta decay or to advance restrictions on the neutrino mass to < 0.01 eV, were considered. Requirements for their sensitivity and discovery potential were formulated. Two projects of double beta experiments with a sensitivity on the level of 10^{26}-10^{27} yr (CAMEO and CARVEL projects) were discussed. Scintillation properties and radioactive contamination of CaWO4, ZnWO4, CdWO4, PbWO4, GSO(Ce), CeF3, yttrium-aluminum garnet doped with neodymium (YAG:Nd) crystal scintillators were studied. Applicability of these scintillators to search for double beta decay was discussed.

  7. Restoration of Secondary Containment in Double Shell Tank (DST) Pits

    SciTech Connect (OSTI)

    SHEN, E.J.

    2000-10-05

    Cracks found in many of the double-shell tank (DST) pump and valve pits bring into question the ability of the pits to provide secondary containment and remain in compliance with State and Federal regulations. This study was commissioned to identify viable options for maintain/restoring secondary containment capability in these pits. The basis for this study is the decision analysis process which identifies the requirements to be met and the desired goals (decision criteria) that each option will be weighed against. A facilitated workshop was convened with individuals knowledgeable of Tank Farms Operations, engineering practices, and safety/environmental requirements. The outcome of this workshop was the validation or identification of the critical requirements, definition of the current problem, identification and weighting of the desired goals, baselining of the current repair methods, and identification of potential alternate solutions. The workshop was followed up with further investigations into the potential solutions that were identified in the workshop and through other efforts. These solutions are identified in the body of this report. Each of the potential solutions were screened against the list of requirements and only those meeting the requirements were considered viable options. To expand the field of viable options, hybrid concepts that combine the strongest features of different individual approaches were also examined. Several were identified. The decision analysis process then ranked each of the viable options against the weighted decision criteria, which resulted in a recommended solution. The recommended approach is based upon installing a sprayed on coating system.

  8. The classical double copy for Taub-NUT spacetime

    E-Print Network [OSTI]

    Luna, A; O'Connell, D; White, C D

    2015-01-01

    The double copy is a much-studied relationship between gauge theory and gravity amplitudes. Recently, this was generalised to an infinite family of classical solutions to Einstein's equations, namely stationary Kerr-Schild geometries. In this paper, we extend this to the Taub-NUT solution in gravity, which has a double Kerr-Schild form. The single copy of this solution is a dyon, whose electric and magnetic charges are related to the mass and NUT charge in the gravity theory. Finally, we find hints that the classical double copy extends to curved background geometries.

  9. Fabrication and Measurements of 500 MHz Double Spoke Cavity

    SciTech Connect (OSTI)

    Park, HyeKyoung; Hopper, Christopher S.; Delayen, Jean R.

    2014-12-01

    A 500 MHz ?0=1 double spoke cavity has been designed and optimized for a high velocity application such as a compact electron accelerator at the Center for Accelerator Science at Old Dominion University [1] and the fabrication was recently completed at Jefferson Lab. The geometry specific to the double spoke cavity required a variety of tooling and fixtures. Also a number of asymmetric weld joints were expected to make it difficult to maintain minimal geometric deviation from the design. This paper will report the fabrication procedure, resulting tolerance from the design, initial test results and the lessons learned from the first ?0=1 double spoke cavity fabrication.

  10. Matched Slow Pulses Using Double Electromagnetically Induced Transparency

    E-Print Network [OSTI]

    Andrew MacRae; Geoff Campbell; A. I. Lvovsky

    2008-09-29

    We implement double electromagnetically-induced transparency (double EIT) in rubidium vapor, using a tripod-shaped energy level scheme consisting of hyperfine and magnetic sublevels of the 5S1/2 to 5P1/2 transition. We show experimentally that through the use of double EIT one can control the contrast of transparency windows as well as group velocities of the two signal fields. In particular, the group velocities can be equalized, which holds promise to greatly enhance nonlinear optical interaction between these fields.

  11. Double, Double Toil and Trouble: Tungsten Burns and Helium Bubbles | U.S.

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would like submit theCovalentLaboratory |Sector FullDOE Office of Science (SC) Double,

  12. Reach Adaptation: What Determines Whether We Learn an Internal Model of the Tool or Adapt the Model of Our Arm?

    E-Print Network [OSTI]

    Shadmehr, Reza

    of Our Arm? JoAnn Kluzik,1,3,4 Jo¨rn Diedrichsen,5 Reza Shadmehr,2 and Amy J. Bastian1,3 1 Department learn an internal model of the tool or adapt the model of our arm? J Neurophysiol 100: 1455­1464, 2008 or of our own arm? We considered a well-studied adaptation task in which people made goal-directed reaching

  13. Sense and sensitivity of double beta decay experiments

    SciTech Connect (OSTI)

    Gómez-Cadenas, J.J.; Martín-Albo, J.; Sorel, M.; Ferrario, P.; Monrabal, F.; Muñoz, J. [Instituto de Física Corpuscular (IFIC), CSIC and Universidad de Valencia, Calle Catedrático José Beltrán 2, 46071 Valencia (Spain); Novella, P. [Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Avda. Complutense 22, 28040 Madrid (Spain); Poves, A., E-mail: gomez@mail.cern.ch, E-mail: justo.martin-albo@ific.uv.es, E-mail: sorel@ific.uv.es, E-mail: paola.ferrario@ific.uv.es, E-mail: francesc.monrabal@ific.uv.es, E-mail: jmunoz@ific.uv.es, E-mail: pau.novella@ciemat.es, E-mail: alfredo.poves@uam.es [Dpto. de de Física Teórica and IFT-UAM/CSIC, Universidad Autónoma de Madrid, Calle Nicolás Cabrera 13-15, 28049 Madrid (Spain)

    2011-06-01

    The search for neutrinoless double beta decay is a very active field in which the number of proposals for next-generation experiments has proliferated. In this paper we attempt to address both the sense and the sensitivity of such proposals. Sensitivity comes first, by means of proposing a simple and unambiguous statistical recipe to derive the sensitivity to a putative Majorana neutrino mass, m{sub ??}. In order to make sense of how the different experimental approaches compare, we apply this recipe to a selection of proposals, comparing the resulting sensitivities. We also propose a ''physics-motivated range'' (PMR) of the nuclear matrix elements as a unifying criterium between the different nuclear models. The expected performance of the proposals is parametrized in terms of only four numbers: energy resolution, background rate (per unit time, isotope mass and energy), detection efficiency, and ?? isotope mass. For each proposal, both a reference and an optimistic scenario for the experimental performance are studied. In the reference scenario we find that all the proposals will be able to partially explore the degenerate spectrum, without fully covering it, although four of them (KamLAND-Zen, CUORE, NEXT and EXO) will approach the 50 meV boundary. In the optimistic scenario, we find that CUORE and the xenon-based proposals (KamLAND-Zen, EXO and NEXT) will explore a significant fraction of the inverse hierarchy, with NEXT covering it almost fully. For the long term future, we argue that {sup 136}Xe-based experiments may provide the best case for a 1-ton scale experiment, given the potentially very low backgrounds achievable and the expected scalability to large isotope masses.

  14. EA-1136: Double Tracks Test Site, Nye County, Nevada

    Broader source: Energy.gov [DOE]

    This EA evaluates the environmental impacts of the proposal for the U.S. Department of Energy Nevada Operations Office to conduct environmental restoration operations at the Double Tracks test site...

  15. Electrochemical Double-Layer Capacitors Using Carbon Nanotube Electrode Structures

    E-Print Network [OSTI]

    Schindall, Joel E.

    The structure and behavior of the electrical double-layer capacitor (EDLC) are described. The use of activated carbon electrodes is discussed and the limitations on voltage and accessible surface area are presented. Metrics ...

  16. Double beta decay experiments: beginning of a new era

    E-Print Network [OSTI]

    A. S. Barabash

    2012-09-19

    The review of current experiments on search and studying of double beta decay processes is done. Results of the most sensitive experiments are discussed and values of modern limits on effective Majorana neutrino mass ($) are given. New results on two neutrino double beta decay are presented. The special attention is given to new current experiments with mass of studied isotopes more than 100 kg, EXO--200 and KamLAND--Zen. These experiments open a new era in research of double beta decay. In the second part of the review prospects of search for neutrinoless double beta decay in new experiments with sensitivity to $$ at the level of $\\sim 0.01-0.1$ eV are discussed. Parameters and characteristics of the most perspective projects (CUORE, GERDA, MAJORANA, SuperNEMO, EXO, KamLAND--Zen, SNO+) are given.

  17. Evaluation of short-day onion doubled haploid lines 

    E-Print Network [OSTI]

    Walker, Ryan Lee

    2009-05-15

    Molecular marker analysis of seven putative onion (Allium cepa) doubled haploid (DH) lines developed at Texas A&M University was conducted to verify genetic homozygosity. Analysis was also conducted on five equivalent ...

  18. Comment on "Evidence for Neutrinoless Double Beta Decay"

    E-Print Network [OSTI]

    C. E. Aalseth; F. T. Avignone III; A. Barabash; F. Boehm; R. L. Brodzinski; J. I. Collar; P. J. Doe; H. Ejiri; S. R. Elliott; E. Fiorini; R. J. Gaitskell; G. Gratta; R. Hazama; K. Kazkaz; G. S. King III; R. T. Kouzes; H. S. Miley; M. K. Moe; A. Morales; J. Morales; A. Piepke; R. G. H. Robertson; W. Tornow; P. Vogel; R. A. Warner; J. F. Wilkerson

    2002-05-22

    We comment on the recent claim for the experimental observation of neutrinoless double-beta decay. We discuss several limitations in the analysis provided in that paper and conclude that there is no basis for the presented claim.

  19. Predicting an ultraviolet-tetraherz double resonance spectrum of formaldehyde

    E-Print Network [OSTI]

    Fenn, Emily E. (Emily Elizabeth)

    2006-01-01

    In preparation for performing a triple resonance experiment to study the Rydberg states of calcium monofluoride (CaF), a double resonance spectrum of formaldehyde will be recorded. A dye laser will populate a level in ...

  20. Nebraska: Company More than Doubles Annual Sales and Employees...

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

    than doubled their employees from 119 to 269 since 2010. Leveraging its EERE-supported hydrogen storage tank development, Hexagon is now an active player in the natural gas...

  1. The gauge algebra of double field theory and Courant brackets

    E-Print Network [OSTI]

    Hull, Chris

    We investigate the symmetry algebra of the recently proposed field theory on a doubled torus that describes closed string modes on a torus with both momentum and winding. The gauge parameters are constrained fields on the ...

  2. Performance of a double pass solar air collector

    SciTech Connect (OSTI)

    Ramani, B.M.; Gupta, Akhilesh; Kumar, Ravi

    2010-11-15

    Double pass counter flow solar air collector with porous material in the second air passage is one of the important and attractive design improvement that has been proposed to improve the thermal performance. This paper presents theoretical and experimental analysis of double pass solar air collector with and without porous material. A mathematical model has been developed based on volumetric heat transfer coefficient. Effects of various parameters on the thermal performance and pressure drop characteristics have been discussed. Comparison of results reveals that the thermal efficiency of double pass solar air collector with porous absorbing material is 20-25% and 30-35% higher than that of double pass solar air collector without porous absorbing material and single pass collector respectively. (author)

  3. No-neutrino double beta decay: more than one neutrino

    SciTech Connect (OSTI)

    Rosen, S.P.

    1983-01-01

    Interference effects between light and heavy Majorana neutrinos in the amplitude for no-neutrino double beta decay are discussed. The effects include an upper bound on the heavy neutrino mass, and an A dependence for the effective mass extracted from double beta decay. Thus the search for the no-neutrino decay mode should be pursued in several nuclei, and particularly in Ca/sup 48/, where the effective mass may be quite large.

  4. Effect of nuclear deformation on double beta decay

    SciTech Connect (OSTI)

    Rodin, Vadim [Institute fuer Theoretische Physik der Universitaet Tuebingen, D-72076 Tuebingen (Germany)

    2009-11-09

    The existing ways of accounting for deformation in recent calculations of neutrinoless double beta decay matrix elements are discussed. From an analysis of relevant experimental data it is argued that only {sup 150}Nd reveals convincing evidences of strong static deformation, which should eventually be taken into account in QRPA calculations. A proposal which allows in principle to measure the neutrino less double beta decay Fermi matrix element is briefly described.

  5. Overconstrained estimates of neutrinoless double beta decay within the QRPA

    E-Print Network [OSTI]

    Amand Faessler; Gianluigi Fogli; Eligio Lisi; Vadim Rodin; Anna Maria Rotunno; Fedor Simkovic

    2008-05-29

    Estimates of nuclear matrix elements for neutrinoless double beta decay (0nu2beta) based on the quasiparticle random phase approximations (QRPA) are affected by theoretical uncertainties, which can be substantially reduced by fixing the unknown strength parameter g_pp of the residual particle-particle interaction through one experimental constraint - most notably through the two-neutrino double beta decay (2nu2beta) lifetime. However, it has been noted that the g_pp adjustment via 2\

  6. Deformed quantum double realization of the toric code and beyond

    E-Print Network [OSTI]

    Pramod Padmanabhan; Juan Pablo Ibieta Jimenez; Miguel Jorge Bernabé Ferreira; Paulo Teotonio-Sobrinho

    2015-12-10

    Quantum double models, such as the toric code, can be constructed from transfer matrices of lattice gauge theories with discrete gauge groups and parametrized by the center of the gauge group algebra and its dual. For general choices of these parameters the transfer matrix contains operators acting on links which can also be thought of as perturbations to the quantum double model driving it out of its topological phase and destroying the exact solvability of the quantum double model. We modify these transfer matrices with perturbations and extract exactly solvable models which remain in a quantum phase, thus nullifying the effect of the perturbation. The algebra of the modified vertex and plaquette operators now obey a deformed version of the quantum double algebra. The Abelian cases are shown to be in the quantum double phase whereas the non-Abelian phases are shown to be in a modified phase of the corresponding quantum double phase. These are illustrated with the groups $\\mathbb{Z}_n$ and $S_3$. The quantum phases are determined by studying the excitations of these systems namely their fusion rules and the statistics. We then go further to construct a transfer matrix which contains the other $\\mathbb{Z}_2$ phase namely the double semion phase. More generally for other discrete groups these transfer matrices contain the twisted quantum double models. These transfer matrices can be thought of as being obtained by introducing extra parameters into the transfer matrix of lattice gauge theories. These parameters are central elements belonging to the tensor products of the algebra and its dual and are associated to vertices and volumes of the three dimensional lattice. As in the case of the lattice gauge theories we construct the operators creating the excitations in this case and study their braiding and fusion properties.

  7. Neutrinoless Double Beta Decay with Negligible Neutrino Mass

    E-Print Network [OSTI]

    Biswajoy Brahmachari; Ernest Ma

    2002-02-27

    If the electron neutrino has an effective nonzero Majorana mass, then neutrinoless double beta decay will occur. However, the latter is possible also with a negligible neutrino mass. We show how this may happen in a simple model of scalar diquarks and dileptons. This possibility allows neutrino masses to be small and hierarchical, without conflicting with the possible experimental evidence of neutrinoless double beta decay.

  8. Possible background reductions in double beta decay experiments

    E-Print Network [OSTI]

    R. Arnold; C. Augier; J. Baker; A. Barabash; O. Bing; V. Brudanin; A. J. Caffrey; E. Caurier; K. Errahmane; A. -I. Etienvre; J. L. Guyonnet; F. Hubert; Ph. Hubert; C. Jollet; S. Jullian; O. Kochetov; V. Kovalenko; D. Lalanne; F. Leccia; C. Longuemare; Ch. Marquet; F. Mauger; H. W. Nicholson; H. Ohsumi; F. Piquemal; J-L. Reyss; X. Sarazin; Yu. Shitov; L. Simard; I. Stekl; J. Suhonen; C. S. Sutton; G. Szklarz; V. Timkin; V. Tretyak; V. Umatov; L. Vala; I. Vanyushin; V. Vasilyev; V. Vorobel; Ts. Vylov

    2003-02-19

    The background induced by radioactive impurities of $^{208}\\rm Tl$ and $^{214}\\rm Bi$ in the source of the double beta experiment NEMO-3 has been investigated. New methods of data analysis which decrease the background from the above mentioned contamination are identified. The techniques can also be applied to other double beta decay experiments capable of measuring independently the energies of the two electrons.

  9. What can we learn from neutrinoless double beta decay experiments?

    E-Print Network [OSTI]

    John N. Bahcall; Hitoshi Murayama; Carlos Pena-Garay

    2004-04-08

    We assess how well next generation neutrinoless double beta decay and normal neutrino beta decay experiments can answer four fundamental questions. 1) If neutrinoless double beta decay searches do not detect a signal, and if the spectrum is known to be inverted hierarchy, can we conclude that neutrinos are Dirac particles? 2) If neutrinoless double beta decay searches are negative and a next generation ordinary beta decay experiment detects the neutrino mass scale, can we conclude that neutrinos are Dirac particles? 3) If neutrinoless double beta decay is observed with a large neutrino mass element, what is the total mass in neutrinos? 4) If neutrinoless double beta decay is observed but next generation beta decay searches for a neutrino mass only set a mass upper limit, can we establish whether the mass hierarchy is normal or inverted? We base our answers on the expected performance of next generation neutrinoless double beta decay experiments and on simulations of the accuracy of calculations of nuclear matrix elements.

  10. Growth, steady-state, and time-resolved photoluminescence study of CdTe/MgCdTe double heterostructures on InSb substrates using molecular beam epitaxy

    SciTech Connect (OSTI)

    DiNezza, Michael J.; Liu, Shi; Kirk, Alexander P.; Zhang, Yong-Hang [Center for Photonics Innovation, Arizona State University, Tempe, Arizona 85287 (United States) [Center for Photonics Innovation, Arizona State University, Tempe, Arizona 85287 (United States); School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, Arizona 85287 (United States); Zhao, Xin-Hao [Center for Photonics Innovation, Arizona State University, Tempe, Arizona 85287 (United States) [Center for Photonics Innovation, Arizona State University, Tempe, Arizona 85287 (United States); School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, Arizona 85287 (United States)

    2013-11-04

    CdTe/MgCdTe double heterostructures (DHs) are grown on InSb substrates using molecular beam epitaxy and reveal strong photoluminescence with over double the intensity of a GaAs/AlGaAs DH with an identical layer structure design grown on GaAs. Time-resolved photoluminescence of the CdTe/MgCdTe DH gives a Shockley-Read-Hall recombination lifetime of 86 ns, which is more than one order of magnitude longer than that of typical polycrystalline CdTe films. These findings indicate that monocrystalline CdTe/MgCdTe DHs effectively reduce surface recombination, have limited nonradiative interface recombination, and are promising for solar cells that could reach power conversion efficiencies similar to that of GaAs.

  11. THE DOUBLE PULSAR: EVIDENCE FOR NEUTRON STAR FORMATION WITHOUT AN IRON CORE-COLLAPSE SUPERNOVA

    SciTech Connect (OSTI)

    Ferdman, R. D.; Kramer, M.; Stappers, B. W.; Lyne, A. G. [School of Physics and Astronomy, University of Manchester, Jodrell Bank Centre for Astrophysics, Alan Turing Building, Oxford Road, Manchester M13 9PL (United Kingdom)] [School of Physics and Astronomy, University of Manchester, Jodrell Bank Centre for Astrophysics, Alan Turing Building, Oxford Road, Manchester M13 9PL (United Kingdom); Stairs, I. H. [Department of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1 (Canada)] [Department of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1 (Canada); Breton, R. P. [School of Physics and Astronomy, University of Southampton, Highfield, Southampton SO17 1BJ (United Kingdom)] [School of Physics and Astronomy, University of Southampton, Highfield, Southampton SO17 1BJ (United Kingdom); McLaughlin, M. A. [Department of Physics, West Virginia University, Morgantown, WV 26505 (United States)] [Department of Physics, West Virginia University, Morgantown, WV 26505 (United States); Freire, P. C. C. [Max-Planck-Institut fuer Radioastronomie, Auf dem Huegel 69, D-53121 Bonn (Germany)] [Max-Planck-Institut fuer Radioastronomie, Auf dem Huegel 69, D-53121 Bonn (Germany); Possenti, A. [INAF-Osservatorio Astronomico di Cagliari, Loc. Poggio dei Pini, I-09012 Capoterra (Italy)] [INAF-Osservatorio Astronomico di Cagliari, Loc. Poggio dei Pini, I-09012 Capoterra (Italy); Kaspi, V. M. [Department of Physics, McGill University, Ernest Rutherford Physics Building, 3600 University Street, Montreal, QC H3A 2T8 (Canada)] [Department of Physics, McGill University, Ernest Rutherford Physics Building, 3600 University Street, Montreal, QC H3A 2T8 (Canada); Manchester, R. N., E-mail: ferdman@jb.man.ac.uk [CSIRO Astronomy and Space Science, Australia Telescope National Facility, Epping, NSW 1710 (Australia)

    2013-04-10

    The double pulsar system PSR J0737-3039A/B is a double neutron star binary, with a 2.4 hr orbital period, which has allowed measurement of relativistic orbital perturbations to high precision. The low mass of the second-formed neutron star, as well as the low system eccentricity and proper motion, point to a different evolutionary scenario compared to most other known double neutron star systems. We describe analysis of the pulse profile shape over 6 years of observations and present the resulting constraints on the system geometry. We find the recycled pulsar in this system, PSR J0737-3039A, to be a near-orthogonal rotator with an average separation between its spin and magnetic axes of 90 Degree-Sign {+-} 11 Degree-Sign {+-} 5 Degree-Sign . Furthermore, we find a mean 95% upper limit on the misalignment between its spin and orbital angular momentum axes of 3. Degree-Sign 2, assuming that the observed emission comes from both magnetic poles. This tight constraint lends credence to the idea that the supernova that formed the second pulsar was relatively symmetric, possibly involving electron capture onto an O-Ne-Mg core.

  12. On neutrinoless double beta decay in the minimal left-right symmetric model

    E-Print Network [OSTI]

    Wei-Chih Huang; J. Lopez-Pavon

    2014-04-14

    We analyze the general phenomenology of neutrinoless double beta decay in the minimal left-right symmetric model. We study under which conditions a New Physics dominated neutrinoless double beta decay signal can be expected in the future experiments. We show that the correlation among the different contributions to the process, which arises from the neutrino mass generation mechanism, can play a crucial role. We have found that, if no fine tuned cancellation is involved in the light active neutrino contribution, a New Physics signal can be expected mainly from the $W_R-W_R$ channel. An interesting exception is the $W_L-W_R$ channel which can give a dominant contribution to the process if the right-handed neutrino spectrum is hierarchical with $M_1\\lesssim$ MeV and $M_2,M_3\\gtrsim$ GeV. We also discuss if a New Physics signal in neutrinoless double beta decay experiments is compatible with the existence of a successful Dark Matter candidate in the left-right symmetric models. It turns out that, although it is not a generic feature of the theory, it is still possible to accommodate such a signal with a KeV sterile neutrino as Dark matter.

  13. New physics effects on neutrinoless double beta decay from right-handed current

    E-Print Network [OSTI]

    Shao-Feng Ge; Manfred Lindner; Sudhanwa Patra

    2015-08-28

    We study the impact of new physics contributions to neutrinoless double beta decay arising from right-handed current in comparison with the standard mechanism. If the light neutrinos obtain their masses from Type-II seesaw within left-right symmetric model, where the Type-I contribution is suppressed to negligible extent, the right-handed PMNS matrix is the same as its left-handed counterpart, making it highly predictable and can be tested at next-generation experiments. It is very attractive, especially with recent cosmological constraint favoring the normal hierarchy under which the neutrinoless double beta decay is too small to be observed unless new physics appears as indicated by the recent diboson excess observed at ATLAS. The relative contributions from left- and right-handed currents can be reconstructed with the ratio between lifetimes of two different isotopes as well as the ratio of nuclear matrix elements. In this way, the theoretical uncertainties in the calculation of nuclear matrix elements can be essentially avoided. We also discuss the interplay of neutrinoless double beta decay measurements with cosmology, beta decay, and neutrino oscillation.

  14. Short-range mechanisms of neutrinoless double beta decay at the LHC

    E-Print Network [OSTI]

    J. C. Helo; M. Hirsch; H. Päs; S. G. Kovalenko

    2013-07-18

    Lepton number violation (LNV) mediated by short range operators can manifest itself in both neutrinoless double beta decay and in processes with same sign dilepton final states at the LHC. We derive limits from existing LHC data at $\\sqrt{s}=8$ TeV and compare the discovery potential of the forthcoming $\\sqrt{s}=14$ TeV phase of the LHC with the sensitivity of current and future neutrinoless double beta decay experiments, assuming the short-range part of the decay amplitude dominates. We focus on the first of two possible topologies triggered by one fermion and two bosons in the intermediate state. In all cases, except for the pure leptoquark mechanism, the LHC will be more sensitive than neutrinoless double beta decay in the future. In addition, we propose to search for a charge asymmetry in the final state leptons and to use different invariant mass peaks as a possibility to discriminate the various possible mechanisms for LNV signals at the LHC.

  15. Empirical formulas for direct double ionization by bare ions: Z = - 1 to 92

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

    DuBois, R. D.; Santos, A. C. F.; Manson, S. T.

    2014-11-01

    Experimental cross sections and cross-section ratios reported in the literature for direct double ionization of the outer shells of helium, neon, and argon atoms resulting from bare ions ranging from protons to uranium and for antiprotons are analyzed in terms of a first- and second-order interference model originally proposed by McGuire [J. H. McGuire, Phys. Rev. Lett. 49, 1153 (1982)]. Empirical formulas for the various contributions to double ionization plus information about the phase difference between the first- and second-order mechanisms are extracted from the data. Projectile and target scalings are also extracted. Total cross sections and their ratios determined using these formulas and scalings are shown to be in very good agreement with experimental data for lower-Z projectiles and impact velocities larger than 1 a.u. For very-high-Z projectiles, the amount of double ionization is overestimated, probably due to saturation of probabilities that is not accounted for in scaling formulas.

  16. Empirical formulas for direct double ionization by bare ions: Z = - 1 to 92

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

    DuBois, R. D.; Santos, A. C. F.; Manson, S. T.

    2014-11-25

    Experimental cross sections and cross-section ratios reported in the literature for direct double ionization of the outer shells of helium, neon, and argon atoms resulting from bare ions ranging from protons to uranium and for antiprotons are analyzed in terms of a first- and second-order interference model originally proposed by McGuire [J. H. McGuire, Phys. Rev. Lett. 49, 1153 (1982)]. Empirical formulas for the various contributions to double ionization plus information about the phase difference between the first- and second-order mechanisms are extracted from the data. Projectile and target scalings are also extracted. Total cross sections and their ratios determinedmore »using these formulas and scalings are shown to be in very good agreement with experimental data for lower-Z projectiles and impact velocities larger than 1 a.u. For very-high-Z projectiles, the amount of double ionization is overestimated, probably due to saturation of probabilities that is not accounted for in scaling formulas.« less

  17. Inclusive Pion Double Charge Exchange in 4He at Intermediate Energies

    E-Print Network [OSTI]

    E. R. Kinney; J. L. Matthews; P. A. M. Gram; D. W. MacArthur; E. Piasetzky; G. A. Rebka, Jr.; D. A. Roberts

    2005-07-01

    A systematic experimental study of inclusive pion double charge exchange in 4He has been undertaken. The reaction 4He(pi+,pi-)4p was observed at incident energies 120, 150, 180, 240 and 270 MeV; the 4He(pi-,pi+)4n reaction was observed at incident energies 180 and 240 MeV. At each incident energy, the doubly differential cross section was measured at three to five outgoing pion laboratory angles between 25 deg and 130 deg. At each angle, cross sections were measured over the range of outgoing pion energies from 10 MeV up to the kinematic limit for the reaction in which the final state consists of the oppositely charged pion plus four free nucleons. The spectra of outgoing pions are strikingly different from those observed for the inclusive double charge exchange reaction in heavier nuclei, but resemble those observed in the (pi-,pi+) reaction in 3He. The forward-angle spectra in the 3He and 4He reactions exhibit a prominent peak at high outgoing pion energies. Interpretation of the peaks in 3He (4He) as a three- (four-)nucleon resonance is ruled out by kinematic analysis. The results of a calculation, wherein the double charge exchange reaction is assumed to proceed as two sequential single charge exchange interactions, suggest that the high-energy peak is naturally explained by this double scattering mechanism. Non-static treatment of the pi-N interactions and the inclusion of nuclear binding effects appear to be important in reproducing the shape of the energy spectra at forward angles.

  18. Microsoft Word - Agreement Reached

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass map shines light on77 PAGE OF PAGESpersonal informationAGENCYB Listing of2009Contact:

  19. Solving the Double Digestion Problem as a MixedInteger Linear Program \\Lambda

    E-Print Network [OSTI]

    Zhang, Yin

    Solving the Double Digestion Problem as a Mixed­Integer Linear Program \\Lambda Zhijun Wu y and Yin Zhang z August, 2001 Abstract. The double digestion problem for DNA restriction mapping is known­scale double digestion problems. Key Words. DNA sequencing, restriction mapping, double digestion, NP

  20. TOWARDS A PRECISION MEASUREMENT OF THE HALF LIFE OF NEUTRINOLESS DOUBLE BETA DECAY OF 136

    E-Print Network [OSTI]

    Gratta, Giorgio

    ). Even if debatable, a first hint came from the claimed observation of neutrinoless double beta decay

  1. SLOW RISE AND PARTIAL ERUPTION OF A DOUBLE-DECKER FILAMENT. I. OBSERVATIONS AND INTERPRETATION

    SciTech Connect (OSTI)

    Liu Rui; Kliem, Bernhard; Toeroek, Tibor; Titov, Viacheslav S.; Lionello, Roberto; Linker, Jon A.; Liu Chang; Wang Haimin

    2012-09-01

    We study an active-region dextral filament that was composed of two branches separated in height by about 13 Mm, as inferred from three-dimensional reconstruction by combining SDO and STEREO-B observations. This 'double-decker' configuration sustained for days before the upper branch erupted with a GOES-class M1.0 flare on 2010 August 7. Analyzing this evolution, we obtain the following main results. (1) During the hours before the eruption, filament threads within the lower branch were observed to intermittently brighten up, lift upward, and then merge with the upper branch. The merging process contributed magnetic flux and current to the upper branch, resulting in its quasi-static ascent. (2) This transfer might serve as the key mechanism for the upper branch to lose equilibrium by reaching the limiting flux that can be stably held down by the overlying field or by reaching the threshold of the torus instability. (3) The erupting branch first straightened from a reverse S shape that followed the polarity inversion line and then writhed into a forward S shape. This shows a transfer of left-handed helicity in a sequence of writhe-twist-writhe. The fact that the initial writhe is converted into the twist of the flux rope excludes the helical kink instability as the trigger process of the eruption, but supports the occurrence of the instability in the main phase, which is indeed indicated by the very strong writhing motion. (4) A hard X-ray sigmoid, likely of coronal origin, formed in the gap between the two original filament branches in the impulsive phase of the associated flare. This supports a model of transient sigmoids forming in the vertical flare current sheet. (5) Left-handed magnetic helicity is inferred for both branches of the dextral filament. (6) Two types of force-free magnetic configurations are compatible with the data, a double flux rope equilibrium and a single flux rope situated above a loop arcade.

  2. Axisymmetric oscillation modes of a double droplet system

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

    Ramalingam, Santhosh K.; Basaran, Osman A.

    2010-01-01

    A double droplet system (DDS) consists of a sessile and a pendant drop that are coupled through a liquid filled cylindrical hole in a plate of thickness d. For a small hole radius R, equilibrium shapes of both drops are sections of spheres. While DDSs have a number of applications in microfluidics, a DDS oscillating about its equilibrium state can be used as a fast focusing liquid lens. Here, a DDS consisting of an isothermal, incompressible Newtonian fluid of constant density p and constant viscosity u that is surrounded by a gas is excited by oscillating in time (a) the pressure in the gas surrounding either drop (pressure excitation), (b) the plate perpendicular to its plane (axial excitation), and (c) the hole radius (radial excitation). In contrast to previous works that assumed transient drop shapes are spherical, they are determined here by simulation and used to identify the natural modes of axisymmetric oscillations from resonances observed during frequency sweeps with DDSs for which the combined volume V of the two drops is less than (4/3)?R3. Pressure and axial excitations are found to have identical responses but axial and radial excitations are shown to excite different modes. These modes are compared to those exhibited by single pendant (sessile) drop systems. In particular, while a single pendant (sessile) drop has one additional oscillation mode compared to a free drop, a DDS is found to exhibit roughly twice as many oscillation modes as a pendant (sessile) drop. The effects of dimensionless volume V/R3, dimensionless plate thickness d/R, and Ohnesorge number Oh =?/??R? , where ? is the surface tension of the DDS-gas interface, on the resonance frequencies are also investigated.

  3. Axisymmetric oscillation modes of a double droplet system

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

    Ramalingam, Santhosh K.; Basaran, Osman A.

    2010-11-15

    A double droplet system (DDS) consists of a sessile and a pendant drop that are coupled through a liquid filled cylindrical hole in a plate of thickness d. For a small hole radius R, equilibrium shapes of both drops are sections of spheres. While DDSs have a number of applications in microfluidics, a DDS oscillating about its equilibrium state can be used as a fast focusing liquid lens. Here, a DDS consisting of an isothermal, incompressible Newtonian fluid of constant density p and constant viscosity u that is surrounded by a gas is excited by oscillating in time (a) themore »pressure in the gas surrounding either drop (pressure excitation), (b) the plate perpendicular to its plane (axial excitation), and (c) the hole radius (radial excitation). In contrast to previous works that assumed transient drop shapes are spherical, they are determined here by simulation and used to identify the natural modes of axisymmetric oscillations from resonances observed during frequency sweeps with DDSs for which the combined volume V of the two drops is less than (4/3)?R3. Pressure and axial excitations are found to have identical responses but axial and radial excitations are shown to excite different modes. These modes are compared to those exhibited by single pendant (sessile) drop systems. Specifically, while a single pendant (sessile) drop has one additional oscillation mode compared to a free drop, a DDS is found to exhibit roughly twice as many oscillation modes as a pendant (sessile) drop. The effects of dimensionless volume V/R3, dimensionless plate thickness d/R, and Ohnesorge number Oh =?/??R? , where ? is the surface tension of the DDS-gas interface, on the resonance frequencies are also investigated.« less

  4. Axisymmetric oscillation modes of a double droplet system

    SciTech Connect (OSTI)

    Ramalingam, Santhosh K.; Basaran, Osman A.

    2010-11-15

    A double droplet system (DDS) consists of a sessile and a pendant drop that are coupled through a liquid filled cylindrical hole in a plate of thickness d. For a small hole radius R, equilibrium shapes of both drops are sections of spheres. While DDSs have a number of applications in microfluidics, a DDS oscillating about its equilibrium state can be used as a fast focusing liquid lens. Here, a DDS consisting of an isothermal, incompressible Newtonian fluid of constant density p and constant viscosity u that is surrounded by a gas is excited by oscillating in time (a) the pressure in the gas surrounding either drop (pressure excitation), (b) the plate perpendicular to its plane (axial excitation), and (c) the hole radius (radial excitation). In contrast to previous works that assumed transient drop shapes are spherical, they are determined here by simulation and used to identify the natural modes of axisymmetric oscillations from resonances observed during frequency sweeps with DDSs for which the combined volume V of the two drops is less than (4/3)?R3. Pressure and axial excitations are found to have identical responses but axial and radial excitations are shown to excite different modes. These modes are compared to those exhibited by single pendant (sessile) drop systems. In particular, while a single pendant (sessile) drop has one additional oscillation mode compared to a free drop, a DDS is found to exhibit roughly twice as many oscillation modes as a pendant (sessile) drop. The effects of dimensionless volume V/R3, dimensionless plate thickness d/R, and Ohnesorge number Oh =?/??R? , where ? is the surface tension of the DDS-gas interface, on the resonance frequencies are also investigated.

  5. Average and recommended half-life values for two neutrino double beta decay: upgrade'05

    E-Print Network [OSTI]

    A. S. Barabash

    2006-02-17

    All existing ``positive'' results on two neutrino double beta decay in different nuclei were analyzed. Using the procedure recommended by the Particle Data Group, weighted average values for half-lives of $^{48}$Ca, $^{76}$Ge, $^{82}$Se, $^{96}$Zr, $^{100}$Mo, $^{100}$Mo - $^{100}$Ru ($0^+_1$), $^{116}$Cd, $^{150}$Nd, $^{150}$Nd - $^{150}$Sm ($0^+_1$) and $^{238}$U were obtained. Existing geochemical data were analyzed and recommended values for half-lives of $^{128}$Te, $^{130}$Te and $^{130}$Ba are proposed. We recommend the use of these results as presently the most precise and reliable values for half-lives.

  6. Average and recommended half-life values for two neutrino double beta decay: upgrade-09

    E-Print Network [OSTI]

    A. S. Barabash

    2009-08-28

    All existing ``positive'' results on two neutrino double beta decay in different nuclei were analyzed. Using the procedure recommended by the Particle Data Group, weighted average values for half-lives of $^{48}$Ca, $^{76}$Ge, $^{82}$Se, $^{96}$Zr, $^{100}$Mo, $^{100}$Mo - $^{100}$Ru ($0^+_1$), $^{116}$Cd, $^{130}$Te, $^{150}$Nd, $^{150}$Nd - $^{150}$Sm ($0^+_1$) and $^{238}$U were obtained. Existing geochemical data were analyzed and recommended values for half-lives of $^{128}$Te, $^{130}$Te and $^{130}$Ba are proposed. We recommend the use of these results as presently the most precise and reliable values for half-lives.

  7. Average (RECOMMENDED) Half-Life Values for Two Neutrino Double Beta Decay

    E-Print Network [OSTI]

    A. S. Barabash

    2002-03-01

    All existing "positive" results on two neutrino double beta decay in different nuclei were analyzed. Using procedure recommended by Particle Data Group weighted average values for half-lives of $^{48}$Ca, $^{76}$Ge, $^{82}$Se, $^{96}$Zr, $^{100}$Mo, $^{100}$Mo - $^{100}$Ru ($0^+_1$), $^{116}$Cd, $^{150}$Nd and $^{238}$U were obtained. Existing geochemical data were analyzed and recommended values for half-lives of $^{128}$Te and $^{130}$Te are proposed. We recommend to use these results as most precise and reliable values for half-lives at this moment.

  8. Heat flux characteristics in an atmospheric double arc argon plasma jet

    SciTech Connect (OSTI)

    Tu Xin; Yu Liang; Yan Jianhua; Cen Kefa; Cheron, Bruno

    2008-10-13

    In this study, the axial evolution of heat flux excited by a double arc argon plasma jet impinging on a flat plate is determined, while the nonstationary behavior of the heat flux is investigated by combined means of the fast Fourier transform, Wigner distribution, and short-time Fourier transform. Two frequency groups (<1 and 2-10 kHz) are identified in both the Fourier spectrum and the time-frequency distributions, which suggest that the nature of fluctuations in the heat flux is strongly associated with the dynamic behavior of the plasma arc and the engulfment of ambient air into different plasma jet regions.

  9. Probing the nuclide 180W for neutrinoless double-electron capture exploration

    E-Print Network [OSTI]

    C. Droese; K. Blaum; M. Block; S. Eliseev; F. Herfurth; E. Minaya Ramirez; Yu. N. Novikov; L. Schweikhard; V. M. Shabaev; I. I. Tupitsyn; S. Wycech; K. Zuber; N. A. Zubova

    2011-11-28

    The mass difference of the nuclides 180W and 180Hf has been measured with the Penning-trap mass spectrometer SHIPTRAP to investigate 180W as a possible candidate for the search for neutrinoless doubleelectron capture. The Q-value was measured to 143.20(27)keV. This value in combination with the calculations of the atomic electron wave functions and other parameters results in a half-life of the 0+ \\rightarrow 0+ ground-state to ground-state double-electron capture transition of approximately 5\\cdot10E27 years/^2.

  10. Possible experimental evidence for the presence of double octupole states in {sup 240}Pu

    SciTech Connect (OSTI)

    Pascu, S.; Spieker, M.; Bucurescu, D.; Faestermann, T.; Hertenberger, R.; Skalacki, S.; Weber, S.; Wirth, H. F.; Zamfir, N. V.; Zilges, A.

    2012-10-20

    Excited states in the {sup 240}Pu nucleus have been studied by means of the (p,t) reaction using the Q3D spectrometer and the focal plane detector from Munich. The comparison between experimental angular distributions and the DWBA calculations allowed the extraction of relative two-neutron transfer strengths. These observables may reveal important information about the structure of different states. The experimental two neutron strength for the 0{sup +}{sub 2} and 0{sup +}{sub 3} states is found in good agreement with the predictions of the IBA model, confirming the double octupole nature for the 0{sup +}{sub 2} state proposed in the previous studies.

  11. Bachelor programme European Studies Double Diploma 2014-2015 The third year (60 EC) of the Double Diploma Programme European Studies (old style)

    E-Print Network [OSTI]

    Twente, Universiteit

    1 Bachelor programme European Studies Double Diploma 2014-2015 The third year (60 EC) of the Double students who did their first two years at the University of Muenster and do their third year in 2014 arrangements For students of the old style double diploma programme who started their third year in Twente

  12. Dipole-Dipole coupled double Rydberg molecules

    E-Print Network [OSTI]

    Martin Kiffner; Hyunwook Park; Wenhui Li; Tom F. Gallagher

    2012-05-21

    We show that the dipole-dipole interaction between two Rydberg atoms can give rise to long range molecules. The binding potential arises from two states that converge to different separated atom asymptotes. These states interact weakly at large distances, but start to repel each other strongly as the van der Waals interaction turns into a resonant dipole-dipole interaction with decreasing separation between the atoms. This mechanism leads to the formation of an attractive well for one of the potentials. If the two separated atom asymptotes come from the small Stark splitting of an atomic Rydberg level, which lifts the Zeeman degeneracy, the depth of the well and the location of its minimum are controlled by the external electric field. We discuss two different geometries that result in a localized and a donut shaped potential, respectively.

  13. Can one measure nuclear matrix elements of neutrinoless double {beta} decay?

    SciTech Connect (OSTI)

    Rodin, Vadim; Faessler, Amand [Institute fuer Theoretische Physik der Universitaet Tuebingen, D-72076 Tuebingen (Germany)

    2009-10-15

    By making use of the isospin conservation by strong interaction, the Fermi 0{nu}{beta}{beta} nuclear matrix element M{sub F}{sup 0{nu}} is transformed to acquire the form of an energy-weighted double Fermi transition matrix element. This useful representation allows reconstruction of the total M{sub F}{sup 0{nu}} provided a small isospin-breaking Fermi matrix element between the isobaric analog state in the intermediate nucleus and the ground state of the daughter nucleus could be measured, e.g., by charge-exchange reactions. Such a measurement could set a scale for the 0{nu}{beta}{beta} nuclear matrix elements and help to discriminate between the different nuclear structure models in which calculated M{sub F}{sup 0{nu}} may differ by as much as a factor of 5 (that translates to about 20% difference in the total M{sup 0{nu}})

  14. Proton form factor ratio, {mu}{sub p}G{sub E}{sup P}/G{sub M}{sup P} from double spin asymmetry

    SciTech Connect (OSTI)

    Habarakada Liyanage, Anusha Pushpakumari

    2013-08-01

    The form factors are fundamental properties of the nucleon representing the effect of its structure on its response to electromagnetic probes such as electrons. They are functions of the four-momentum transfer squared Q{sup 2} between the electron and the proton. This thesis reports the results of a new measurement of the ratio of the electric and magnetic form factors of the proton up to Q{sup 2} = 5.66 (GeV/c){sup 2} using the double spin asymmetry with a polarized beam and target. Experiment E07-003 (SANE, Spin Asymmetries of the Nucleon Experiment) was carried out in Hall C at Jefferson Lab in 2009 to study the proton spin structure functions with a dynamically polarized ammonia target and longitudinally polarized electron beam. By detecting elastically scattered protons in the High-Momentum Spectrometer (HMS) in coincidence with the electrons in the Big Electron Telescope Array (BETA), elastic measurements were carried out in parallel. The elastic double spin asymmetry allows one to extract the proton electric to magnetic form factor ratio G{sup p}{sub E}/G{sup p}{sub M} at high-momentum transfer, Q{sup 2} = 5.66 (GeV/c){sup 2}. In addition to the coincidence data, inclusively scattered electrons from the polarized ammonia target were detected by HMS, which allows to measure the beam-target asymmetry in the elastic region with the target spin nearly perpendicular to the momentum transfer, and to extract G{sup p}{sub E}/G{sup p}{sub M} at low Q{sup 2} = 2.06 (GeV/c){sup 2}. This alternative measurement of G{sup p}{sub E}/G{sup p}{sub M} has verified and confirmed the dramatic discrepancy at high Q{sup 2} between the Rosenbluth and the recoil-polarization-transfer iv method with a different measurement technique and systematic uncertainties uncorrelated to those of the recoil-polarization measurements. The measurement of the form factor ratio at Q{sup 2} = 2.06 (GeV/c){sup 2} has been determined as {mu}{sub p}G{sup p}{sub E}/G{sup p}{sub M} = 0.605{+-}0.178{sub stat}{+-}0.033{sub sys} which is in agreement with an earlier measurement with the polarized target technique at similar kinematics. The measurement of the form factor ratio at Q{sup 2} = 5.66 (GeV/c){sup 2} has been determined as {mu}{sub p}G{sup p}{sub E}/G{sup p}{sub M} = 0.672 {+-} 0.362{sub stat} which represents the highest Q{sup 2} reach with the double spin asymmetry to date.

  15. Mechanical seal having a double-tier mating ring

    DOE Patents [OSTI]

    Khonsari, Michael M.; Somanchi, Anoop K.

    2005-09-13

    An apparatus and method to enhance the overall performance of mechanical seals in one of the following ways: by reducing seal face wear, by reducing the contact surface temperature, or by increasing the life span of mechanical seals. The apparatus is a mechanical seal (e.g., single mechanical seals, double mechanical seals, tandem mechanical seals, bellows, pusher mechanical seals, and all types of rotating and reciprocating machines) comprising a rotating ring and a double-tier mating ring. In a preferred embodiment, the double-tier mating ring comprises a first and a second stationary ring that together form an agitation-inducing, guided flow channel to allow for the removal of heat generated at the seal face of the mating ring by channeling a coolant entering the mating ring to a position adjacent to and in close proximity with the interior surface area of the seal face of the mating ring.

  16. The Spacetime of Double Field Theory: Review, Remarks, and Outlook

    E-Print Network [OSTI]

    Olaf Hohm; Dieter Lust; Barton Zwiebach

    2014-10-30

    We review double field theory (DFT) with emphasis on the doubled spacetime and its generalized coordinate transformations, which unify diffeomorphisms and b-field gauge transformations. We illustrate how the composition of generalized coordinate transformations fails to associate. Moreover, in dimensional reduction, the O(d,d) T-duality transformations of fields can be obtained as generalized diffeomorphisms. Restricted to a half-dimensional subspace, DFT includes `generalized geometry', but is more general in that local patches of the doubled space may be glued together with generalized coordinate transformations. Indeed, we show that for certain T-fold backgrounds with non-geometric fluxes, there are generalized coordinate transformations that induce, as gauge symmetries of DFT, the requisite O(d,d;Z) monodromy transformations. Finally we review recent results on the \\alpha' extension of DFT which, reduced to the half-dimensional subspace, yields intriguing modifications of the basic structures of generalized geometry.

  17. Exchange bias in Fe/Cr double superlattices.

    SciTech Connect (OSTI)

    Jiang, J. S.; Felcher, G. P.; Inomata, A.; Goyette, R.; Nelson, C.; Bader, S. D.

    1999-11-30

    Utilizing the oscillatory interlayer exchange coupling in Fe/Cr superlattices, we have constructed ''double superlattice'' structures where a ferromagnetic (F) and an antiferromagnetic (AF) Fe/Cr superlattice are coupled through a Cr spacer. The minor hysteresis loops in the magnetization are shifted from zero field, i.e., the F superlattice is exchange biased by the AF one. The double superlattices are sputter-deposited with (211) epitaxy and possess uniaxial in-plane magnetic anisotropy. The magnitude of the bias field is satisfactorily described by the classic formula for collinear spin structures. The coherent structure and insensitivity to atomic-scale roughness makes it possible to determine the spin distribution by polarized neutron reflectivity, which confirms that the spin structure is collinear. The magnetic reversal behavior of the double superlattices suggests that a realistic model of exchange bias needs to address the process of nucleating local reverse domains.

  18. Searching for Double Beta Decay with the Enriched Xenon Observatory

    SciTech Connect (OSTI)

    Hall, C.; /SLAC

    2007-03-16

    The Enriched Xenon Observatory (EXO) Collaboration is building a series of experiments to search for the neutrinoless double beta decay of {sup 136}Xe. The first experiment, known as EXO-200, will utilize 200 kg of xenon enriched to 80% in the isotope of interest, making it the largest double beta decay experiment to date by one order of magnitude. This experiment is rapidly being constructed, and will begin data taking in 2007. The EXO collaboration is also developing a technique to identify on an event-by-event basis the daughter barium ion of the double beta decay. If successful, this method would eliminate all conventional radioactive backgrounds to the decay, resulting in an ideal experiment. We summarize here the current status of EXO-200 construction and the barium tag R&D program.

  19. Q value of the 100Mo Double-Beta Decay

    E-Print Network [OSTI]

    S. Rahaman; V. -V. Elomaa; T. Eronen; J. Hakala; A. Jokinen; J. Julin; A. Kankainen; A. Saastamoinen; J. Suhonen; C. Weber; J. Äystö

    2007-12-20

    Penning trap measurements using mixed beams of 100Mo - 100Ru and 76Ge - 76Se have been utilized to determine the double-beta decay Q-values of 100Mo and 76Ge with uncertainties less than 200 eV. The value for 76Ge, 2039.04(16) keV is in agreement with the published SMILETRAP value. The new value for 100Mo, 3034.40(17) keV is 30 times more precise than the previous literature value, sufficient for the ongoing neutrinoless double-beta decay searches in 100Mo. Moreover, the precise Q-value is used to calculate the phase-space integrals and the experimental nuclear matrix element of double-beta decay.

  20. Heavy Sterile Neutrinos and Neutrinoless Double Beta Decay

    E-Print Network [OSTI]

    Manimala Mitra; Goran Senjanovic; Francesco Vissani

    2012-05-17

    Sterile neutrinos of mass up to a few tens of TeV can saturate the present experimental bound of neutrinoless double beta decay process. Due to the updated nuclear matrix elements, the bound on mass and mixing angle is now improved by one order of magnitude. We have performed a detailed analysis of neutrinoless double beta decay for the minimal Type I seesaw scenario. We have shown that in spite of the naive expectation that the light neutrinos give the dominant contribution, sterile neutrinos can saturate the present experimental bound of neutrinoless double beta decay process. However, in order to be consistent with radiative stability of light neutrino masses, the mass scale of sterile neutrinos should be less than 10 GeV.

  1. Short-range correlations and neutrinoless double beta decay

    E-Print Network [OSTI]

    M. Kortelainen; O. Civitarese; J. Suhonen; J. Toivanen

    2007-01-18

    In this work we report on the effects of short-range correlations upon the matrix elements of neutrinoless double beta decay. We focus on the calculation of the matrix elements of the neutrino-mass mode of neutrinoless double beta decays of 48Ca and 76Ge. The nuclear-structure components of the calculation, that is the participant nuclear wave functions, have been calculated in the shell-model scheme for 48Ca and in the proton-neutron quasiparticle random-phase approximation (pnQRPA) scheme for 76Ge. We compare the traditional approach of using the Jastrow correlation function with the more complete scheme of the unitary correlation operator method (UCOM). Our results indicate that the Jastrow method vastly exaggerates the effects of short-range correlations on the neutrinoless double beta decay nuclear matrix elements.

  2. A prototype silicon double quantum dot with dispersive microwave readout

    SciTech Connect (OSTI)

    Schmidt, A. R. Henry, E.; Namaan, O.; Siddiqi, I.; Lo, C. C.; Wang, Y.-T.; Bokor, J.; Yablonovitch, E.; Li, H.; Greenman, L.; Whaley, K. B.; Schenkel, T.

    2014-07-28

    We present a unique design and fabrication process for a lateral, gate-confined double quantum dot in an accumulation mode metal-oxide-semiconductor (MOS) structure coupled to an integrated microwave resonator. All electrostatic gates for the double quantum dot are contained in a single metal layer, and use of the MOS structure allows for control of the location of the two-dimensional electron gas via the location of the accumulation gates. Numerical simulations of the electrostatic confinement potential are performed along with an estimate of the coupling of the double quantum dot to the microwave resonator. Prototype devices are fabricated and characterized by transport measurements of electron confinement and reflectometry measurements of the microwave resonator.

  3. Double-Kasner Spacetime: Peculiar Velocities and Cosmic Jets

    E-Print Network [OSTI]

    C. Chicone; B. Mashhoon; K. Rosquist

    2011-06-20

    In dynamic spacetimes in which asymmetric gravitational collapse/expansion is taking place, the timelike geodesic equation appears to exhibit an interesting property: Relative to the collapsing configuration, free test particles undergo gravitational "acceleration" and form a double-jet configuration parallel to the axis of collapse. We illustrate this aspect of peculiar motion in simple spatially homogeneous cosmological models such as the Kasner spacetime. To estimate the effect of spatial inhomogeneities on cosmic jets, timelike geodesics in the Ricci-flat double-Kasner spacetime are studied in detail. While spatial inhomogeneities can significantly modify the structure of cosmic jets, we find that under favorable conditions the double-jet pattern can initially persist over a finite period of time for sufficiently small inhomogeneities.

  4. The difference between “equivalent” and “not different

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

    Anderson-Cook, Christine M.; Borror, Connie M.

    2015-10-27

    Often, experimenters wish to establish that populations of units can be considered equivalent to each other, in order to leverage improved knowledge about one population for characterizing the new population, or to establish the comparability of items. Equivalence tests have existed for many years, but their use in industry seems to have been largely restricted to biomedical applications, such as for assessing the equivalence of two drugs or protocols. We present the fundamentals of equivalence tests, compare them to traditional two-sample and ANOVA tests that are better suited to establishing differences in populations, and propose the use of a graphicalmore »summary to compare p-values across different thresholds of practically important differences.« less

  5. Electronic structures and ferromagnetism of SnO{sub 2} (rutile) doped with double-impurities: First-principles calculations

    SciTech Connect (OSTI)

    Fakhim Lamrani, A.; Belaiche, M.; Benyoussef, A.; and others

    2014-01-07

    The electronic and magnetic properties of double-impurities-doped SnO{sub 2} (rutile) are explored using first-principles calculations within the generalized gradient approximation to examine their potential use as spintronic system. Calculations are performed for double impurities (M1 and M2) from M1?=?Cr, and M2?=?Mn, and Re. The origins of ferromagnetism are shown to be different in the two cases. For Sn{sub 1-2x}Cr{sub x}Mn{sub x}O2, the hybridization between Cr-3d and O-2p results in Cr becoming ferromagnetic with a magnetic moment of about 5.0 ?{sub B} per supercell. The Cr-and Mn-doped SnO{sub 2} system exhibits half-metallic ferromagnetism. The strong ferromagnetic couplings between local magnetic moments can be attributed to p-d hybridization. In contrast, in (Cr, Re) codoped TiO{sub 2}, the local magnetic moments of the impurities and their oxidation states agree with the charge transfer between Cr and Re, which would lead to the ferromagnetic through the double-exchange mechanism in transition metal oxides. Since there are two possible couplings between the impurities, we studied both configurations (ferromagnetic and antiferromagnetic (AF)) for double-impurities-doped SnO{sub 2}. Our calculations show that a ferromagnetic alignment of the spins is energetically always more stable than simple AF arrangements, which makes these materials possible candidates for spin injection in spintronic devices.

  6. Commutation Relations for Double Tensors of Two Equivalent D Electrons

    E-Print Network [OSTI]

    Chin-Sheng Wu

    2007-07-07

    We apply the Clebsch-Gordan and Racah coefficients to calculate the double tensors for two equivalent d electrons. We also obtain the commutation relations for these double tensors and choose certain quantum numbers, which produce a subgroup. From the root vectors of the commutation relations, we identify them with Lie algebra B2. Once we have the correct Lie algebra, it is feasible to use the Wigner-Eckart theorem to find matrix elements for transition states among atomic spectra or nuclear shell models.

  7. Consistency test of neutrinoless double beta decay with one isotope

    E-Print Network [OSTI]

    Michael Duerr; Manfred Lindner; Kai Zuber

    2011-11-17

    We discuss a consistency test which makes it possible to discriminate unknown nuclear background lines from neutrinoless double beta decay with only one isotope. By considering both the transition to the ground state and to the first excited $0^+$ state, a sufficiently large detector can reveal if neutrinoless double beta decay or some other nuclear physics process is at work. Such a detector could therefore simultaneously provide a consistency test for a certain range of Majorana masses and be sensitive to lower values of the effective Majorana mass.

  8. Empirical Survey of Neutrinoless Double Beta Decay Matrix Elements

    E-Print Network [OSTI]

    R. G. H. Robertson

    2013-01-07

    Neutrinoless double beta decay has been the subject of intensive theoretical work as it represents the only practical approach to discovering whether neutrinos are Majorana particles or not, and whether lepton number is a conserved quantum number. Available calculations of matrix elements and phase-space factors are reviewed from the perspective of a future large-scale experimental search for neutrinoless double beta decay. Somewhat unexpectedly, a uniform inverse correlation between phase space and the square of the nuclear matrix element emerges. As a consequence, no isotope is either favored or disfavored; all have qualitatively the same decay rate per unit mass for any given value of the Majorana mass.

  9. Consistency test of neutrinoless double beta decay with one isotope

    SciTech Connect (OSTI)

    Duerr, Michael; Lindner, Manfred [Max-Planck-Institut fuer Kernphysik, Postfach 10 39 80, 69029 Heidelberg (Germany); Zuber, Kai [Technical University Dresden, Institut fuer Kern- und Teilchenphysik, 01069 Dresden (Germany)

    2011-11-01

    We discuss a consistency test which makes it possible to discriminate unknown nuclear background lines from neutrinoless double beta decay with only one isotope. By considering both the transition to the ground state and to the first excited 0{sup +} state, a sufficiently large detector can reveal if neutrinoless double beta decay or some other nuclear physics process is at work. Such a detector could therefore simultaneously provide a consistency test for a certain range of Majorana masses and be sensitive to lower values of the effective Majorana mass .

  10. Quantum theory of light double-slit diffraction

    E-Print Network [OSTI]

    Xiang-Yao Wu; Hong Li; Bo-Jun Zhang; Ji Ma; Xiao-Jing Liu; Nuo Ba; He Dong; Si-Qi Zhang; Jing Wang; Yi-Heng Wu; Xin-Guo Yin

    2013-05-10

    In this paper, we study the light double-slit diffraction experiment with quantum theory approach. Firstly, we calculate the light wave function in slits by quantum theory of photon. Secondly, we calculate the diffraction wave function with Kirchhoff's law. Thirdly, we give the diffraction intensity of light double-slit diffraction, which is proportional to the square of diffraction wave function. Finally, we compare calculation result of quantum theory and classical electromagnetic theory with the experimental data. We find the quantum calculate result is accordance with the experiment data, and the classical calculation result with certain deviation. So, the quantum theory is more accurately approach for studying light diffraction.

  11. Period doubling, information entropy, and estimates for Feigenbaum's constants

    E-Print Network [OSTI]

    Reginald D. Smith

    2013-08-03

    The relationship between period doubling bifurcations and Feigenbaum's constants has been studied for nearly 40 years and this relationship has helped uncover many fundamental aspects of universal scaling across multiple nonlinear dynamical systems. This paper will combine information entropy with symbolic dynamics to demonstrate how period doubling can be defined using these tools alone. In addition, the technique allows us to uncover some unexpected, simple estimates for Feigenbaum's constants which relate them to log 2 and the golden ratio, phi, as well as to each other.

  12. Double K-shell photoionization of atomic beryllium

    SciTech Connect (OSTI)

    Yip, F. L. [Departamento de Quimica, Modulo 13, Universidad Autonoma de Madrid, E-28049 Madrid (Spain); Martin, F. [Departamento de Quimica, Modulo 13, Universidad Autonoma de Madrid, E-28049 Madrid (Spain); Instituto Madrilen (tilde sign)o de Estudios Avanzados en Nanociencia, Cantoblanco, E-28049 Madrid (Spain); McCurdy, C. W. [Department of Chemistry, University of California, Davis, California 95616 (United States); Lawrence Berkeley National Laboratory, Chemical Sciences, and Ultrafast X-ray Science Laboratory, Berkeley, California 94720 (United States); Rescigno, T. N. [Lawrence Berkeley National Laboratory, Chemical Sciences, and Ultrafast X-ray Science Laboratory, Berkeley, California 94720 (United States)

    2011-11-15

    Double photoionization of the core 1s electrons in atomic beryllium is theoretically studied using a hybrid approach that combines orbital and grid-based representations of the Hamiltonian. The {sup 1} S ground state and {sup 1} P final state contain a double occupancy of the 2s valence shell in all configurations used to represent the correlated wave function. Triply differential cross sections are evaluated, with particular attention focused on a comparison of the effects of scattering the ejected electrons through the spherically symmetric valence shell with similar cross sections for helium, representing a purely two-electron target with an analogous initial-state configuration.

  13. New generation of double beta decay experiments: are there any limitations?

    SciTech Connect (OSTI)

    Barabash, A. S. [Institute of Theoretical and Experimental Physics, B. Cheremushkinskaya 25, 117259 Moscow (Russian Federation)

    2011-12-16

    New generation of experiments to search for neutrinoless double beta decay with sensitivity to effective Majorana neutrino mass on the level of {approx}3-5 meV is discussed. Possible restrictions in achievement of this sensitivity such as: possibility to produce large amount of enriched isotopes, possibility to reach of a very low level of background, energy resolution and possible cost of experiments are considered. It is shown that for realization of so ambitious project 10 tons (or more) of enriched isotope is required. Background index should be on the level {<=}10{sup -5}-10{sup -6} c/kg{center_dot}keV{center_dot}y. In addition, the energy resolution of the detector should be no worse than 1-2%. It is shown that {sup 130}TeO{sub 2} low temperature bolometer could be the most realistic candidate for such an experiment. Under certain conditions experiments with {sup 76}Ge, {sup 100}Mo and {sup 136}Xe can be realized too.

  14. Searching for Neutrinoless Double-Beta Decay of130Te with CUORE

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

    Artusa, D. R.; Avignone, F. T.; Azzolini, O.; Balata, M.; Banks, T. I.; Bari, G.; Beeman, J.; Bellini, F.; Bersani, A.; Biassoni, M.; et al

    2015-01-01

    Neutrinoless double-beta (0???) decay is a hypothesized lepton-number-violating process that offers the only known means of asserting the possible Majorana nature of neutrino mass. The Cryogenic Underground Observatory for Rare Events (CUORE) is an upcoming experiment designed to search for 0???decay of130Te using an array of 988 TeO2crystal bolometers operated at 10?mK. The detector will contain 206?kg of130Te and have an average energy resolution of 5?keV; the projected 0???decay half-life sensitivity after five years of livetime is 1.6?×?1026?y at 1?(9.5?×?1025?y at the 90% confidence level), which corresponds to an upper limit on the effective Majorana massmore »in the range 40–100?meV (50–130?meV). In this paper, we review the experimental techniques used in CUORE as well as its current status and anticipated physics reach.« less

  15. Searching for Neutrinoless Double-Beta Decay of 130 Te with CUORE

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

    Artusa, D. R.; Avignone, F. T.; Azzolini, O.; Balata, M.; Banks, T. I.; Bari, G.; Beeman, J.; Bellini, F.; Bersani, A.; Biassoni, M.; et al

    2015-01-01

    Neutrinoless double-beta (0 ? ? ? ) decay is a hypothesized lepton-number-violating process that offers the only known means of asserting the possible Majorana nature of neutrino mass. The Cryogenic Underground Observatory for Rare Events (CUORE) is an upcoming experiment designed to search for 0 ? ? ? decay of 130 Te using an array of 988 TeO 2 crystal bolometers operated at 10?mK. The detector will contain 206?kg of 130 Te and have an average energy resolution of 5?keV; the projected 0 ? ? ? decay half-life sensitivity aftermore »five years of livetime is 1.6?×?10 26 ?y at 1 ? (9.5?×?10 25 ?y at the 90% confidence level), which corresponds to an upper limit on the effective Majorana mass in the range 40–100?meV (50–130?meV). In this paper, we review the experimental techniques used in CUORE as well as its current status and anticipated physics reach. « less

  16. Testing the Bimodal/Schizophrenic Neutrino Hypothesis in Neutrinoless Double Beta Decay and Neutrino Telescopes

    E-Print Network [OSTI]

    James Barry; Rabindra N. Mohapatra; Werner Rodejohann

    2011-06-27

    The standard assumption is that all three neutrino mass states are either Dirac or Majorana. However, it was recently suggested by Allaverdi, Dutta and one of the authors (R.N.M.) that mixed, or bimodal, flavor neutrino scenarios are conceivable and are consistent with all known observations (these were called "schizophrenic" in the ADM paper). In that case each individual mass eigenstate can be either Dirac or Majorana, so that the flavor eigenstates are "large" admixtures of both. An example of this "bimodal" situation is to consider one mass state as a Dirac particle (with a sterile partner), while the other two are of Majorana type. Since only Majorana particles contribute to neutrinoless double beta decay, the usual dependence of this observable on the neutrino mass is modified within this scenario. We study this in detail and, in particular, generalize the idea for all possible bimodal combinations. Inevitably, radiative corrections will induce a pseudo-Dirac nature to the Dirac states at the one-loop level, and the effects of the pseudo-Dirac mass splitting will show up in the flavor ratios of neutrinos from distant cosmological sources. Comparison of the effective mass in neutrinoless double beta decay as well as flavor ratios at neutrino telescopes, for different pseudo-Dirac cases and with their usual phenomenology, can distinguish the different bimodal possibilities.

  17. Fragility of ferromagnetic double exchange interactions and pressure tuning of magnetism in 3d–5d double perovskite Sr?FeOsO?

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

    Veiga, L. S. I.; Fabbris, G.; van Veenendaal, M.; Souza-Neto, N. M.; Feng, H. L.; Yamaura, K.; Haskel, D.

    2015-06-01

    The ability to tune exchange (magnetic) interactions between 3d transition metals in perovskite structures has proven to be a powerful route to discovery of novel properties. Here we demonstrate that the introduction of 3d-5d exchange pathways in double perovskites enables additional tunability, a result of the large spatial extent of 5d wave functions. Using x-ray probes of magnetism and structure at high pressure, we show that compression of Sr?FeOsO? drives an unexpected continuous change in the sign of Fe-Os exchange interactions and a transition from antiferromagnetic to ferrimagnetic order. We analyze the relevant electron-electron interactions, shedding light into fundamental differences with the more thoroughly studied 3d-3d systems.

  18. Computer code for double beta decay QRPA based calculations

    SciTech Connect (OSTI)

    Barbero, C. A.; Mariano, A.; Krmpoti?, F.; Samana, A. R.; Ferreira, V. dos Santos; Bertulani, C. A.

    2014-11-11

    The computer code developed by our group some years ago for the evaluation of nuclear matrix elements, within the QRPA and PQRPA nuclear structure models, involved in neutrino-nucleus reactions, muon capture and ?{sup ±} processes, is extended to include also the nuclear double beta decay.

  19. Neutrinoless double beta decay mediated by the neutrino magnetic moment

    E-Print Network [OSTI]

    Marek Gó?d?; Wies?aw A. Kami?ski

    2014-11-07

    We present a new channel of the neutrinoless double beta decay. In this scenario neutrinos not only oscillate inside the nucleus but also interact with an external non-uniform magnetic field. We assume that the field rotates about the direction of motion of the neutrino and show, that for a certain speed of rotation the half-life of the $0\

  20. DOUBLE DUCTED FAN (DDF) Cengiz Camci and Ali Akturk

    E-Print Network [OSTI]

    Camci, Cengiz

    DOUBLE DUCTED FAN (DDF) By Cengiz Camci and Ali Akturk A technology description document a novel ducted fan inlet flow conditioning concept that will significantly improve the performance" and many other ducted fan based systems. The new concept that will significantly reduce the inlet lip

  1. Double Shell Tank AY-102 Radioactive Waste Leak Investigation

    SciTech Connect (OSTI)

    Washenfelder, Dennis J.

    2014-04-10

    PowerPoint. The objectives of this presentation are to: Describe Effort to Determine Whether Tank AY-102 Leaked; Review Probable Causes of the Tank AY-102 Leak; and, Discuss Influence of Leak on Hanford’s Double-Shell Tank Integrity Program.

  2. Tunneling of Graphene Massive Dirac Fermions through a Double Barrier

    E-Print Network [OSTI]

    Hocine Bahlouli; El Bouazzaoui Choubabi; Ahmed Jellal; Miloud Mekkaoui

    2011-10-04

    We study the tunneling of Dirac fermions in graphene through a double barrier potential allowing the carriers to have an effective mass inside the barrier as generated by a lattice miss-match with the boron nitride substrate. The consequences of this gap opening on the transmission are investigated. The realization of resonant tunneling conditions is also analyzed.

  3. Mixer pump test plan for double shell tank AZ-101

    SciTech Connect (OSTI)

    STAEHR, T.W.

    1999-05-12

    Mixer pump systems have been chosen as the method for retrieval of tank wastes contained in double shell tanks at Hanford. This document describes the plan for testing and demonstrating the ability of two 300 hp mixer pumps to mobilize waste in tank AZ-101. The mixer pumps, equipment and instrumentation to monitor the test were installed by Project W-151.

  4. Contributors xix DOUBLE-NEGATIVE (DNG) METAMATERIALS 1

    E-Print Network [OSTI]

    CONTENTS Preface xv Contributors xix PART I DOUBLE-NEGATIVE (DNG) METAMATERIALS 1 SECTION I THREE-DIMENSIONAL VOLUMETRIC DNG METAMATERIALS 3 CHAPTER 1 INTRODUCTION, HISTORY, AND SELECTED TOPICS IN FUNDAMENTAL THEORIES OF METAMATERIALS 5 Richard W. Ziolkowski and Nader Engheta 1.1 Introduction 5 1.2 Wave Parameters in DNG Media 9 1

  5. Double Beta Decay and the Absolute Neutrino Mass Scale

    E-Print Network [OSTI]

    Carlo Giunti

    2003-08-20

    After a short review of the current status of three-neutrino mixing, the implications for the values of neutrino masses are discussed. The bounds on the absolute scale of neutrino masses from Tritium beta-decay and cosmological data are reviewed. Finally, we discuss the implications of three-neutrino mixing for neutrinoless double-beta decay.

  6. Bound states in a hyperbolic asymmetric double-well

    SciTech Connect (OSTI)

    Hartmann, R. R.

    2014-01-15

    We report a new class of hyperbolic asymmetric double-well whose bound state wavefunctions can be expressed in terms of confluent Heun functions. An analytic procedure is used to obtain the energy eigenvalues and the criterion for the potential to support bound states is discussed.

  7. Neutrinoless Double Beta Decay with R-parity Violation

    E-Print Network [OSTI]

    Yosuke Uehara

    2002-06-26

    We consider recently observed neutrinoless double beta decay in the context of the minimal supersymmetric standard model with R-parity violating couplings lambda^{'}. We observe that most of the current experimental bounds on the R-parity violating couplings do not exclude the possibility that the neutrinoless double beta decay is caused by R-parity violation. But if we consider K-bar{K} oscillation, we observe that we have to make the R-parity violating couplings generation-dependent to accomodate with the observed neutrinoless double beta decay. And furthermore, we need some mechanism to cancel the contribution to K-bar{K} mixing from a large R-parity violating coupling. We realized this cancellation by assuming that the first- and the second- generation of quark sector do not couple with the first-generation lepton sector by R-parity violating couplings except the term W=lambda_{111}^{'} L_{1} Q_{1} D_{1}^{c}, which is responsible for the observed neutrinoless double beta decay.

  8. Double beta decay to the excited states: experimental review

    E-Print Network [OSTI]

    A. S. Barabash

    2007-10-11

    A brief review on double beta decay to excited states of daughter nuclei is given. The ECEC(ov) transision to the excited states are discussed in association with a possible enhancement of the decay rate by several orders of magnitude.

  9. EA-1905: Double Eagle Water System, Carlsbad, New Mexico

    Broader source: Energy.gov [DOE]

    This EA, prepared by the U.S. Department of the Interior’s Bureau of Land Management Carlsbad Field Office and adopted by DOE, evaluates the expansion and upgrade of the City of Carlsbad’s Double Eagle Water System.

  10. Dynamic fluctuation phenomena in double membrane films E. I. Kats*)

    E-Print Network [OSTI]

    Lebedev, Vladimir

    1 is satisfied where g T/ , T is the temperature, and is the bending modulus . The corresponding fluctuations of the membrane lead to the logarithmic renormalization of the bending modulus , which . In this paper we will examine the dynamic properties of such double membrane films. The main peculiarity

  11. Scaling factor inconsistencies in neutrinoless double beta decay

    SciTech Connect (OSTI)

    Cowell, S. [Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

    2006-02-15

    The modern theory of neutrinoless double beta decay includes a scaling factor that has often been treated inconsistently in the literature. The nuclear contribution to the decay half-life can be suppressed by 15%-20% when scaling factors are mismatched. Correspondingly, is overestimated.

  12. Majorana neutrino masses and the neutrinoless double-beta decay

    SciTech Connect (OSTI)

    Faessler, A. [University of Tuebingen, Institute of Theoretical Physics (Germany)], E-mail: amand.faessler@uni-tuebingen.de

    2006-12-15

    Neutrinoless double-beta decay is forbidden in the Standard Model of electroweak and strong interaction but allowed in most Grand Unified Theories (GUTs). Only if the neutrino is a Majorana particle (identical with its antiparticle) and if it has a mass is neutrinoless double-beta decay allowed. Apart from one claim that the neutrinoless double-beta decay in {sup 76}Ge is measured, one has only upper limits for this transition probability. But even the upper limits allow one to give upper limits for the electron Majorana neutrino mass and upper limits for parameters of GUTs and the minimal R-parity-violating supersymmetric model. One further can give lower limits for the vector boson mediating mainly the right-handed weak interaction and the heavy mainly right-handed Majorana neutrino in left-right symmetric GUTs. For that, one has to assume that the specific mechanism is the leading one for neutrinoless double-beta decay and one has to be able to calculate reliably the corresponding nuclear matrix elements. In the present work, one discusses the accuracy of the present status of calculating of the nuclear matrix elements and the corresponding limits of GUTs and supersymmetric parameters.

  13. Neutrinoless Double Beta Decay and {nu}-Mass Determination

    SciTech Connect (OSTI)

    Pedretti, M. [Universita dell Insubria, Via Vallegio 11, 22100 Como (Italy)

    2005-10-12

    The search for Neutrinoless Double Beta Decay could improve our knowledge on neutrino properties. After a brief discussion on the implications of the observation of this rare process, I will introduce the experimental approaches and review the prospects of the search for this nuclear transition.

  14. Neutrinoless double-{beta} decay: Status and future

    SciTech Connect (OSTI)

    Bilenky, S. M. [Joint Institute for Nuclear Research (Russian Federation)], E-mail: bilenky@he.sissa.it

    2006-12-15

    A brief summary of the status of neutrino masses, mixing, and oscillations is presented. Neutrinoless double {beta} decay is considered. Predictions for the effective Majorana mass are reviewed. A possible test of the calculations of nuclear matrix elements of the 0{nu}{beta}{beta} decay is proposed.

  15. New Advances in Neutrinoless Double Beta Decay Matrix Elements

    SciTech Connect (OSTI)

    Munoz, Jose Barea [Instituto de Estructura de la Materia, C.S.I.C. Unidad Asociada al Departamento de Fisica Atomica, Molecular y Nuclear, Facultad de Fisica, Universidad de Sevilla, Apartado 1065, 41080 Sevilla (Spain)

    2010-08-04

    We present the matrix elements necessary to evaluate the half-life of some neutrinoless double beta decay candidates in the framework of the microscopic interacting boson model (IBM). We compare our results with those from other models and extract some simple features of the calculations.

  16. Conditions for detecting CP violation via neutrinoless double beta decay

    E-Print Network [OSTI]

    Alicja Joniec; Marek Zralek

    2005-12-30

    Neutrinoless double beta decay data together with information on the absolute neutrino masses obtained from the future KATRIN experiment and/or astrophysical measurements give a chance to find CP violation in the lepton sector with Majorana neutrinos. We derive and discuss necessary conditions which make discovery of such CP violation possible for the future neutrino oscillation and mass measurements data.

  17. Neutrinoless double beta decay in the microscopic interacting boson model

    SciTech Connect (OSTI)

    Iachello, F. [Center for Theoretical Physics, Sloane Physics Laboratory Yale University New Haven, CT 06520-8120 (United States)

    2009-11-09

    The results of a calculation of the nuclear matrix elements for neutrinoless double beta decay in the closure approximation in several nuclei within the framework of the microscopic interacting boson model (IBM-2) are presented and compared with those calculated in the shell model (SM) and quasiparticle random phase approximation (QRPA)

  18. Scaling Factor Inconsistencies in Neutrinoless Double Beta Decay

    E-Print Network [OSTI]

    S. Cowell

    2005-12-05

    The modern theory of neutrinoless double beta decay includes a scaling factor that has often been treated inconsistently in the literature. The nuclear contribution to the decay half life can be suppressed by 15-20% when scaling factors are mismatched. Correspondingly, $$ is overestimated.

  19. Conditions for detecting CP violation via neutrinoless double beta decay

    SciTech Connect (OSTI)

    Joniec, A.; Zralek, M. [Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice (Poland)

    2006-02-01

    Neutrinoless double beta decay data, together with information on the absolute neutrino masses obtained from the future KATRIN experiment and/or astrophysical measurements, provide a chance to find CP violation in the lepton sector with Majorana neutrinos. We derive and discuss necessary conditions which make discovery of such CP violation possible for the future neutrino oscillation and mass measurements data.

  20. First experiment with the double solenoid RIBRAS system

    SciTech Connect (OSTI)

    Lichtenthaeler, R.; Condori, R. Pampa; Lepine-Szily, A.; Pires, K. C. C.; Morais, M. C.; Leistenschneider, E.; Scarduelli, V. B.; Gasques, L. R.; Faria, P. N. de; Mendes, D. R. Jr.; Shorto, J. M. B.

    2013-05-06

    A description of the double solenoid system (RIBRAS) operating since 2004 in one of the beam lines of the Pelletron Laboratory of the Institute of Physics of the University of Sao Paulo is presented. The recent installation of the secondary scattering chamber after the second solenoid is reported and the first experiment in RIBRAS using both solenoids is described.

  1. Neutrinoless double beta decay mediated by the neutrino magnetic moment

    E-Print Network [OSTI]

    Gó?d?, Marek

    2014-01-01

    We present a new channel of the neutrinoless double beta decay. In this scenario neutrinos not only oscillate inside the nucleus but also interact with an external non-uniform magnetic field. We assume that the field rotates about the direction of motion of the neutrino and show, that for a certain speed of rotation the half-life of the $0\

  2. Resumming double logarithms in the QCD evolution of color dipoles

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

    Iancu, E.; Madrigal, J.D.; Mueller, A.H.; Soyez, G.; Triantafyllopoulos, D.N.

    2015-05-01

    The higher-order perturbative corrections, beyond leading logarithmic accuracy, to the BFKL evolution in QCD at high energy are well known to suffer from a severe lack-of-convergence problem, due to radiative corrections enhanced by double collinear logarithms. Via an explicit calculation of Feynman graphs in light cone (time-ordered) perturbation theory, we show that the corrections enhanced by double logarithms (either energy-collinear, or double collinear) are associated with soft gluon emissions which are strictly ordered in lifetime. These corrections can be resummed to all orders by solving an evolution equation which is non-local in rapidity. This equation can be equivalently rewritten inmore »local form, but with modified kernel and initial conditions, which resum double collinear logs to all orders. We extend this resummation to the next-to-leading order BFKL and BK equations. The first numerical studies of the collinearly-improved BK equation demonstrate the essential role of the resummation in both stabilizing and slowing down the evolution.« less

  3. G8 Hokkaido-Toyako Summit Double Jeopardy

    E-Print Network [OSTI]

    Sadoulet, Elisabeth

    G8 Hokkaido-Toyako Summit Double Jeopardy: Responding to High Food and Fuel Prices July 2, 2008 World Bank #12;SUGGESTED ACTION ITEMS ON FOOD PRICES FOR CONSIDERATION BY THE G8 A New Deal for Global-fuels in the G8 countries: 7. Agree on action in the US and Europe to ease subsidies, mandates and tariffs on bio

  4. Generator Coordinate Method framework for Double Beta Decay

    E-Print Network [OSTI]

    Andrzej Bobyk; Wies?aw A. Kami?ski

    2014-11-10

    We propose a consistent prescription for the derivation of the particle number and angular momentum projected QRPA (PQRPA) equation in the Generator Coordinate Method (GCM) framework for calculation of NME's of double-beta decay of axially deformed nuclei. We derive closed formulae for the calculation of excitation energies and wave functions of the intermediate nucleus.

  5. Coherent control of atomic spin currents in a double well

    E-Print Network [OSTI]

    Chu, Shih-I; Ng, H. T.

    2012-02-27

    We propose a method for controlling the atomic currents of a two-component Bose-Einstein condensate in a double well by applying an external field to the atoms in one of the potential wells. We study the ground-state properties of the system...

  6. Chemical Shielding Tensors for a Silicon-Carbon Double Bond

    E-Print Network [OSTI]

    Apeloig, Yitzhak

    Chemical Shielding Tensors for a Silicon-Carbon Double Bond Jarrod J. Buffy, Robert West,*, Michael of NMR chemical shielding tensors (CST) have been important in aiding the understanding of the nature shielding tensors have been reported and interpreted for compounds containing SidSi,1 PdP,2 SndSn,3 Cd

  7. Jet schemes of rational double point singularities Hussein MOURTADA

    E-Print Network [OSTI]

    Jet schemes of rational double point singularities Hussein MOURTADA September 30, 2012 Abstract We prove that for m N, m big enough, the number of irreducble components of the schemes of m-jets centered of the jet schemes of an E6 singularity to its "minimal" embedded resolutions of singularities. 1

  8. Jet schemes of rational double point singularities Hussein Mourtada

    E-Print Network [OSTI]

    Bodin, Arnaud

    Jet schemes of rational double point singularities Hussein Mourtada Abstract. We prove that for m N, m big enough, the number of irreducible compo- nents of the schemes of m-jets centered at a point on the minimal reso- lution of the singularity. We also relate some irreducible components of the jet schemes

  9. Nuclear Matrix Elements for Double-Beta Decay

    E-Print Network [OSTI]

    Engel, Jonathan

    2015-01-01

    Recent progress in nuclear-structure theory has been dramatic. I describe recent and future applications of ab initio calculations and the generator coordinate method to double-beta decay. I also briefly discuss the old and vexing problem of the renormalization of the weak nuclear axial-vector coupling constant "in medium" and plans to resolve it.

  10. Pd/Ni-WO3 anodic double layer gasochromic device

    DOE Patents [OSTI]

    Lee, Se-Hee; Tracy, C. Edwin; Pitts, J. Roland; Liu, Ping

    2004-04-20

    An anodic double layer gasochromic sensor structure for optical detection of hydrogen in improved response time and with improved optical absorption real time constants, comprising: a glass substrate; a tungsten-doped nickel oxide layer coated on the glass substrate; and a palladium layer coated on the tungsten-doped nickel oxide layer.

  11. Cation ordering and effect of biaxial strain in double perovskite CsRbCaZnCl6

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

    Pilania, G.; Uberuaga, B. P.

    2015-03-19

    Here, we investigate the electronic structure, energetics of cation ordering, and effect of biaxial strain on double perovskite CsRbCaZnCl6 using first-principles calculations based on density functional theory. The two constituents (i.e., CsCaCl3 and RbZnCl3) forming the double perovskite exhibit a stark contrast. While CsCaCl3 is known to exist in a cubic perovskite structure and does not show any epitaxial strain induced phase transitions within an experimentally accessible range of compressive strains, RbZnCl3 is thermodynamically unstable in the perovskite phase and exhibits ultra-sensitive response at small epitaxial strains if constrained in the perovskite phase. We show that combining the two compositionsmore »in a double perovskite structure not only improves overall stability but also the strain-polarization coupling of the material. Our calculations predict a ground state with P4/nmm space group for the double perovskite, where A-site cations (i.e., Cs and Rb) are layer-ordered and B-site cations (i.e., Ca and Zn) prefer a rocksalt type ordering. The electronic structure and bandgap in this system are shown to be quite sensitive to the B-site cation ordering and is minimally affected by the ordering of A-site cations. We find that at experimentally accessible compressive strains CsRbCaZnCl6 can be phase transformed from its paraelectric ground state to an antiferroelectric state, where Zn atoms contribute predominantly to the polarization. Furthermore, both energy difference and activation barrier for a transformation between this antiferroelectric state and the corresponding ferroelectric configuration are predicted to be small. As a result, the computational approach presented here opens a new pathway towards a rational design of novel double perovskites with improved strain response and functionalities.« less

  12. Industrial mixing techniques for Hanford double-shell tanks

    SciTech Connect (OSTI)

    Daymo, E.A.

    1997-09-01

    Jet mixer pumps are currently the baseline technology for sludge mobilization and mixing in one-million gallon double-shell tanks at the Hanford and Savannah River Sites. Improvements to the baseline jet mixer pump technology are sought because jet mixer pumps have moving parts that may fail or require maintenance. Moreover, jet mixers are relatively expensive, they heat the waste, and, in some cases, may not mobilize enough of the sludge. This report documents a thorough literature search for commercially available applicable mixing technologies that could be used for double-shell tank sludge mobilization and mixing. Textbooks, research articles, conference proceedings, mixing experts, and the Thomas Register were consulted to identify applicable technologies. While there are many commercial methods that could be used to mobilize sludge or mix the contents of a one-million gallon tank, few will work given the geometrical constraints (e.g., the mixer must fit through a 1.07-m-diameter riser) or the tank waste properties (e.g., the sludge has such a high yield stress that it generally does not flow under its own weight). Pulsed fluid jets and submersible Flygt mixers have already been identified at Hanford and Savannah River Sites for double-shell tank mixing applications. While these mixing technologies may not be applicable for double-shell tanks that have a thick sludge layer at the bottom (since too many of these mixers would need to be installed to mobilize most of the sludge), they may have applications in tanks that do not have a settled solids layer. Retrieval projects at Hanford and other U.S. Department of Energy sites are currently evaluating the effectiveness of these mixing techniques for tank waste applications. The literature search did not reveal any previously unknown technologies that should be considered for sludge mobilization and mixing in one-million gallon double-shell tanks.

  13. The Neutrinoless Double Beta Decay, Physics beyond the Standard Model and the Neutrino Mass

    E-Print Network [OSTI]

    Amand Faessler

    2012-03-16

    The Neutrinoless double beta Decay allows to determine the effectice Majorana electron neutrino mass. For this the following conditions have to be satisfied: (i) The neutrino must be a Majorana particle, i. e. identical to the antiparticle. (ii) The half life has to be measured. (iii)The transition matrix element must be reliably calculated. (iv) The leading mechanism must be the light Majorana neutrino exchange. The present contribution studies the accuracy with which one can calculate by different methods: (1) Quasi-Particle Random Phase Approach (QRPA), (2) the Shell Model (SM), (3) the (before the variation) angular momentum projected Hartree-Fock-Bogoliubov method (PHFB)and the (4) Interacting Boson Approach (IBA). In the second part we investigate how to determine experimentally the leading mechanism for the Neutrinoless Double Beta Decay. Is it (a) the light Majorana neutrino exchange as one assumes to determine the effective Majorana neutrino mass, ist it the heavy left (b) or right handed (c) Majorana neutrino exchange allowed by left-right symmetric Grand Unified Theories (GUT's). Is it a mechanism due to Supersymmetry e.g. with gluino exchange and R-parity and lepton number violating terms. At the end we assume, that Klapdor et al. have indeed measured the Neutrinoless Double Beta Decay(, although contested,)and that the light Majorana neutrino exchange is the leading mechanism. With our matrix elements we obtain then an effective Majorana neutrino mass of: = 0.24 [eV], exp (pm) 0.02; theor. (pm) 0.01 [eV

  14. Driving equitable demand : early lessons from the BetterBuildings Program to access 'hard-to-reach' communities for energy efficiency building improvements

    E-Print Network [OSTI]

    Crauderueff, Robert (Robert Joseph)

    2011-01-01

    Increasing the energy efficiency of low- to moderate-income and minority-occupied households could significantly reduce energy consumption in the United States. Strategies to access these 'hard to reach' households, however, ...

  15. Hanford Reaches Recovery Act Goal for Waste Cleanup Ahead of Schedule- Workers Shipped 1,800 Cubic Meters for Treatment and Disposal

    Broader source: Energy.gov [DOE]

    RICHLAND, Wash. – Today, the Department of Energy Hanford Site announced it reached a cleanup goal more than two months ahead of schedule at the Hanford Site in southeast Washington State.

  16. *Always wear lint and powder free clean room gloves when reaching into the specimen chamber to reduce leaving oils, dust, or other contaminants inside the chamber.

    E-Print Network [OSTI]

    SX-100 *Always wear lint and powder free clean room gloves when reaching into the specimen chamber (off) on the small on/off box behind the monitors. 6) Wait 30 minutes to cool down the diffusion pump

  17. Self-Assembly of DNA Double-Double Crossover Complexes into High-Density, Doubly Connected, Planar Structures

    E-Print Network [OSTI]

    Brun, Yuriy

    consisting of two DNA double helices connected by two reciprocal exchanges (crossovers). In 1998, Winfree et connected by a total of six reciprocal exchanges. We use DDX complexes to self-assemble high-density, doubly reciprocal exchanges connecting each pair of adjacent helices. Figure 1b shows how the complexes might tile

  18. Double Auctions, Ex-Post Participation Constraints, and the Hold-Up Problem

    E-Print Network [OSTI]

    Troger, Thomas

    2002-01-01

    Double Auctions, Ex-Post Participation Constraints, and theFirstly, we demonstrate how ex-post negotiations via doubleSecondly, we show that ex-post participation constraints

  19. Galois theory and a new homotopy double groupoid of a map of ...

    E-Print Network [OSTI]

    functor I = 1 : C !X from the category C to the category X = Grpd of (small) ... Since the internal groupoids in Grpd are the same as double groupoids, it is a double.

  20. Search for Neutrinoless Double-Beta Decay in 136Xe with EXO-200...

    Office of Scientific and Technical Information (OSTI)

    Neutrinoless Double-Beta Decay in 136Xe with EXO-200 Citation Details In-Document Search Title: Search for Neutrinoless Double-Beta Decay in 136Xe with EXO-200 Authors: Auger, M. ;...

  1. Market Power and Efficiency in a Computational Electricity Market With Discriminatory Double-Auction Pricing

    E-Print Network [OSTI]

    Tesfatsion, Leigh

    electricity market operating in the short run under systematically varied concentration and capacity1 Market Power and Efficiency in a Computational Electricity Market With Discriminatory Double market, restructuring, repeated double auction, market power, efficiency, concentration, capacity

  2. A measurement of the 2 neutrino double beta decay rate of Te-130 in the CUORICINO experiment

    E-Print Network [OSTI]

    Kogler, Laura

    2012-01-01

    1.2.2 Neutrinoless double beta decay . . . . . 1.2.3 NuclearEvidence for Neutrinoless Double Beta Decay, Mod. Phys.on ’Evidence for Neutrinoless Double Beta Decay’, Mod. Phys.

  3. A measurement of the 2 neutrino double beta decay rate of 130Te in the CUORICINO experiment

    E-Print Network [OSTI]

    Kogler, Laura Katherine

    2011-01-01

    1.2.2 Neutrinoless double beta decay . . . . . 1.2.3 NuclearEvidence for Neutrinoless Double Beta Decay, Mod. Phys.on ’Evidence for Neutrinoless Double Beta Decay’, Mod. Phys.

  4. Measurement of $?_{13}$ in Double Chooz using neutron captures on hydrogen with novel background rejection techniques

    E-Print Network [OSTI]

    Double Chooz Collaboration; Y. Abe; T. Abrahão; H. Almazan; C. Alt; J. C. dos Anjos; J. C. Barriere; E. Baussan; I. Bekman; M. Bergevin; T. J. C. Bezerra; L. Bezrukov; E. Blucher; T. Brugière; C. Buck; J. Busenitz; A. Cabrera; L. Camilleri; R. Carr; M. Cerrada; E. Chauveau; P. Chimenti; A. P. Collin; J. M. Conrad; J. I. Crespo-Anadón; K. Crum; A. S. Cucoanes; E. Damon; J. V. Dawson; J. Dhooghe; D. Dietrich; Z. Djurcic; M. Dracos; A. Etenko; M. Fallot; F. von Feilitzsch; J. Felde; S. M. Fernandes; V. Fischer; D. Franco; M. Franke; H. Furuta; I. Gil-Botella; L. Giot; M. Göger-Neff; H. Gomez; L. F. G. Gonzalez; L. Goodenough; M. C. Goodman; N. Haag; T. Hara; J. Haser; D. Hellwig; M. Hofmann; G. A. Horton-Smith; A. Hourlier; M. Ishitsuka; J. Jochum; C. Jollet; F. Kaether; L. N. Kalousis; Y. Kamyshkov; M. Kaneda; D. M. Kaplan; T. Kawasaki; E. Kemp; H. de Kerret; D. Kryn; M. Kuze; T. Lachenmaier; C. E. Lane; T. Lasserre; A. Letourneau; D. Lhuillier; H. P. Lima Jr; M. Lindner; J. M. López-Castaño; J. M. LoSecco; B. Lubsandorzhiev; S. Lucht; J. Maeda; C. Mariani; J. Maricic; J. Martino; T. Matsubara; G. Mention; A. Meregaglia; T. Miletic; R. Milincic; A. Minotti; Y. Nagasaka; D. Navas-Nicolás; P. Novella; L. Oberauer; M. Obolensky; A. Onillon; A. Osborn; C. Palomares; I. M. Pepe; S. Perasso; A. Porta; G. Pronost; J. Reichenbacher; B. Reinhold; M. Röhling; R. Roncin; B. Rybolt; Y. Sakamoto; R. Santorelli; A. C. Schilithz; S. Schönert; S. Schoppmann; M. H. Shaevitz; R. Sharankova; D. Shrestha; V. Sibille; V. Sinev; M. Skorokhvatov; E. Smith; M. Soiron; J. Spitz; A. Stahl; I. Stancu; L. F. F. Stokes; M. Strait; F. Suekane; S. Sukhotin; T. Sumiyoshi; Y. Sun; R. Svoboda; K. Terao; A. Tonazzo; H. H. Trinh Thi; G. Valdiviesso; N. Vassilopoulos; C. Veyssiere; M. Vivier; S. Wagner; N. Walsh; H. Watanabe; C. Wiebusch; M. Wurm; G. Yang; F. Yermia; V. Zimmer

    2015-10-29

    The Double Chooz collaboration presents a measurement of the neutrino mixing angle $\\theta_{13}$ using reactor $\\overline{\

  5. Double, Rydberg and charge transfer excitations from pairing matrix fluctuation and particle-particle random phase approximation

    SciTech Connect (OSTI)

    Yang, Yang [Department of Chemistry, Duke University, Durham, North Carolina 27708 (United States)] [Department of Chemistry, Duke University, Durham, North Carolina 27708 (United States); Aggelen, Helen van [Department of Chemistry, Duke University, Durham, North Carolina 27708 (United States) [Department of Chemistry, Duke University, Durham, North Carolina 27708 (United States); Department of Inorganic and Physical Chemistry, Ghent University, 9000 Ghent (Belgium); Yang, Weitao, E-mail: weitao.yang@duke.edu [Department of Chemistry and Department of Physics, Duke University, Durham, North Carolina 27708 (United States)] [Department of Chemistry and Department of Physics, Duke University, Durham, North Carolina 27708 (United States)

    2013-12-14

    Double, Rydberg, and charge transfer (CT) excitations have been great challenges for time-dependent density functional theory (TDDFT). Starting from an (N ± 2)-electron single-determinant reference, we investigate excitations for the N-electron system through the pairing matrix fluctuation, which contains information on two-electron addition/removal processes. We adopt the particle-particle random phase approximation (pp-RPA) and the particle-particle Tamm-Dancoff approximation (pp-TDA) to approximate the pairing matrix fluctuation and then determine excitation energies by the differences of two-electron addition/removal energies. This approach captures all types of interesting excitations: single and double excitations are described accurately, Rydberg excitations are in good agreement with experimental data and CT excitations display correct 1/R dependence. Furthermore, the pp-RPA and the pp-TDA have a computational cost similar to TDDFT and consequently are promising for practical calculations.

  6. Surface plasmon dispersion engineering via double-metallic AU/AG layers for nitride light-emitting diodes

    DOE Patents [OSTI]

    Tansu, Nelson; Zhao, Hongping; Zhang, Jing; Liu, Guangyu

    2014-04-01

    A double-metallic deposition process is used whereby adjacent layers of different metals are deposited on a substrate. The surface plasmon frequency of a base layer of a first metal is tuned by the surface plasmon frequency of a second layer of a second metal formed thereon. The amount of tuning is dependent upon the thickness of the metallic layers, and thus tuning can be achieved by varying the thicknesses of one or both of the metallic layers. In a preferred embodiment directed to enhanced LED technology in the green spectrum regime, a double-metallic Au/Ag layer comprising a base layer of gold (Au) followed by a second layer of silver (Ag) formed thereon is deposited on top of InGaN/GaN quantum wells (QWs) on a sapphire/GaN substrate.

  7. Multi-isotope degeneracy of neutrinoless double beta decay mechanisms in the quasi-particle random phase approximation

    E-Print Network [OSTI]

    Amand Faessler; G. L. Fogli; E. Lisi; A. M. Rotunno; F. Simkovic

    2011-06-22

    We calculate nuclear matrix elements (NME) of neutrinoless double beta decay in four different candidate nuclei (Ge-76, Se-82, Mo-100, Te-130) within the quasiparticle random phase approximation (QRPA) and its uncertainties. We assume (up to) four coexisting mechanisms for neutrinoless double beta decay, mediated by light Majorana neutrino exchange, heavy Majorana neutrino exchange, R-parity breaking supersymmetry, and squark-neutrino, interfering either constructively or destructively with each other. We find that, unfortunately, current NME uncertainties appear to prevent a robust determination of the relative contribution of each mechanism to the decay amplitude, even assuming accurate measurements of decay lifetimes. The near-degeneracy of the decay mechanisms is analyzed with simple algebraic techniques, which do not involve assumptions about the statistical distribution of errors. We discuss implications of such degeneracy on prospective searches for absolute neutrino masses.

  8. A PRELIMINARY STUDY OF DOUBLE-SIDED ARC WELDING PROCESS IN SHIP STRUCTURE MANUFACTURING

    E-Print Network [OSTI]

    Zhang, YuMing

    A PRELIMINARY STUDY OF DOUBLE-SIDED ARC WELDING PROCESS IN SHIP STRUCTURE MANUFACTURING Yu Meeting, August 21-22, 2002 #12;Objective o Determine the feasibility of double-sided arc welding process in butt welding of DH-36 plates #12;Background: Process o Double-sided arc welding (DSAW): a novel arc

  9. SOLVING LARGE DOUBLE DIGESTION PROBLEMS FOR DNA RESTRICTION MAPPING BY USING

    E-Print Network [OSTI]

    SOLVING LARGE DOUBLE DIGESTION PROBLEMS FOR DNA RESTRICTION MAPPING BY USING BRANCH;Solving Large Double Digestion Problems for DNA Restriction Mapping by Using Branch-and-Bound Integer.S.A. Abstract. The double digestion problem for DNA restriction mapping has been proved to be NP

  10. Physica E 34 (2006) 488492 Molecular states in a one-electron double quantum dot

    E-Print Network [OSTI]

    Ludwig-Maximilians-Universität, München

    2006-01-01

    2006 Abstract The transport spectrum of a strongly tunnel-coupled one-electron double quantum dot.20.Jc Keywords: Double quantum dot; Single electron tunneling; Delocalization; Molecular states of electrons trapped in a double quantum dot (DQD) down to N ¼ 1 [4­7]. Here, we study the transport spectrum

  11. Efficient Double-Precision Cosine Generation Derek Nowrouzezahrai Brian Decker William Bishop

    E-Print Network [OSTI]

    Toronto, University of

    Efficient Double-Precision Cosine Generation Derek Nowrouzezahrai Brian Decker William Bishop the CORDIC algorithm and its many variants for double-precision floating point cal- culations. A hardware on the CORDIC algorithm offer single-precision results. This paper proposes an imple- mentation of a double

  12. Double beta decay, Majorana neutrinos, and neutrino mass Frank T. Avignone III*

    E-Print Network [OSTI]

    Engel, Jonathan

    The theoretical and experimental issues relevant to neutrinoless double beta decay are reviewed. The impact more sensitive, even the nonobservation of neutrinoless double beta decay will be useful Acknowledgments 513 References 514 I. INTRODUCTION Neutrinoless double beta decay 0 is a very slow lepton

  13. SEARCH FOR NEUTRINOLESS DOUBLE BETA DECAY WITH THE NEMO-3 DETECTOR : FIRST RESULTS

    E-Print Network [OSTI]

    Boyer, Edmond

    1 SEARCH FOR NEUTRINOLESS DOUBLE BETA DECAY WITH THE NEMO-3 DETECTOR : FIRST RESULTS D. LALANNE to searching for neutrinoless double beta decay (0). The expected performance of the detector has been, no evidence for neutrinoless double beta decay (0) was found from ~7 kg of 100 Mo and ~1 kg of 82 Se

  14. What can we learn from neutrinoless double beta decay experiments? John N. Bahcall,* Hitoshi Murayama,

    E-Print Network [OSTI]

    Bahcall, John

    What can we learn from neutrinoless double beta decay experiments? John N. Bahcall,* Hitoshi-generation neutrinoless double beta decay and normal neutrino beta decay experi- ments can answer four fundamental questions. 1 If neutrinoless double beta decay searches do not detect a signal, and if the spectrum is known

  15. An Evolutionary Game-Theoretic Comparison of Two Double-Auction Market Designs

    E-Print Network [OSTI]

    McBurney, Peter

    An Evolutionary Game-Theoretic Comparison of Two Double-Auction Market Designs Steve Phelps1]. However, in other practical scenarios, especially when it comes to analyzing and designing double. In this paper we describe an analysis of two double auction markets-- the clearing house auction

  16. An evolutionary game-theoretic comparison of two double-auction market designs

    E-Print Network [OSTI]

    Parsons, Simon

    An evolutionary game-theoretic comparison of two double-auction market designs Steve Phelps½, Simon to analyzing and designing double-sided markets, such as exchanges, there are still a number of problems. In this paper we describe an analysis of two double auction markets-- the clearing house auction

  17. Counterion-only electrical double layer: A constrained entropy approach Wuge H. Briscoea)

    E-Print Network [OSTI]

    Attard, Phil

    Counterion-only electrical double layer: A constrained entropy approach Wuge H. Briscoea) Physical medium, it reveals that the electrical double-layer repulsion is weak and long-ranged. Asymptotically.1063/1.1500359 INTRODUCTION The electrical double-layer interaction between charged solid surfaces immersed in a liquid

  18. Alpha Backgrounds and Their Implications for Neutrinoless Double-Beta Decay Experiments Using HPGe Detectors

    E-Print Network [OSTI]

    Washington at Seattle, University of - Department of Physics, Electroweak Interaction Research Group

    Alpha Backgrounds and Their Implications for Neutrinoless Double-Beta Decay Experiments Using HPGe and Their Implications for Neutrinoless Double-Beta Decay Experiments Using HPGe Detectors Robert A. Johnson Chair of the Supervisory Committee: Professor John F. Wilkerson Physics The observation of neutrinoless double-beta decay

  19. Uncertainties in Nuclear Matrix Elements for Neutrinoless Double-Beta Decay

    E-Print Network [OSTI]

    Engel, Jonathan

    Uncertainties in Nuclear Matrix Elements for Neutrinoless Double-Beta Decay Jonathan Engel Abstract. I briefly review calculations of the matrix elements governing neutrinoless double-beta decay;Uncertainties in Nuclear Matrix Elements for Neutrinoless Double-Beta Decay 2 in reducing theoretical error

  20. Mechanism Design for Double Auctions with Temporal Constraints Dengji Zhao1,2

    E-Print Network [OSTI]

    Zhang, Dongmo

    found that the market clearing problem under this extension can be transformed into a weighted bi an extended double auction model where market clearing is restricted by tem- poral constraints. It is found to the design and analysis of dy- namic double auctions and futures markets. 1 Introduction A double auction

  1. IS THE NON OBSERVATION OF NEUTRINOLESS DOUBLE BETA DECAY A QUESTION OF SENSITIVITY?

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 IS THE NON OBSERVATION OF NEUTRINOLESS DOUBLE BETA DECAY A QUESTION OF SENSITIVITY? TSAN UNG CHAN Grenoble Cedex FRANCE The hypothetical neutrinoless double beta decay is possible only if the neutrino. This contradiction would lead to conclude that neutrinoless double beta decay could not take place in nature

  2. The Free Energy of an Electrical Double Layer DEREK Y. C. CHAN AND D. JOHN MITCHELL

    E-Print Network [OSTI]

    Chan, Derek Y C

    The Free Energy of an Electrical Double Layer DEREK Y. C. CHAN AND D. JOHN MITCHELL Department energy of an electrical double layer is derived using thermodynamic considerations together for the surface free energy of an electrical double layer. The result is applicable to a very gen- eral class

  3. Characterization of a plasma produced by pulsed arc using an electrostatic double probe

    SciTech Connect (OSTI)

    Garcia, L.A.; Pulzara, A.O.; Devia, A.; Restrepo, E.

    2005-05-01

    In this work the determination of plasma parameters of a pulsed-arc discharge by using an electrostatic double probe is presented. The system to generate the plasma is composed mainly of a reaction chamber, where the electrodes of different materials (Ti, Zr, Al) were placed in order to identify the variation of the plasma parameters when the cathode material is changed. An automatic system has been implemented for acquiring data starting from the bias of a double electrostatic probe. This system allowed registering complete curves of current-voltage in relatively short times ({approx_equal}30 ms). The electron density n{sub e} and electron temperature T{sub e} can be extracted from the I-V characteristic curves obtained. The advantage of this technique is its facility to provide the whole quantity of 'in situ' information, which can be compared with the theoretical results using numeric methods for the I-V curves simulation. By means of a suitable fit this allowed the determination of the plasma parameters. The values obtained for T{sub e} were in the order of 1 eV and for n{sub e} of about 10{sup 13} cm{sup -3}. A significant variation for n{sub e} was not found.

  4. New physics effects on neutrinoless double beta decay from right-handed current

    E-Print Network [OSTI]

    Ge, Shao-Feng; Patra, Sudhanwa

    2015-01-01

    We study the impact of new physics contributions to neutrinoless double beta decay arising from right-handed current in comparison with the standard mechanism. If the light neutrinos obtain their masses from Type-II seesaw within left-right symmetric model, where the Type-I contribution is suppressed to negligible extent, the right-handed PMNS matrix is the same as its left-handed counterpart, making it highly predictable and can be tested at next-generation experiments. It is very attractive, especially with recent cosmological constraint favoring the normal hierarchy under which the neutrinoless double beta decay is too small to be observed unless new physics appears as indicated by the recent diboson excess observed at ATLAS. The relative contributions from left- and right-handed currents can be reconstructed with the ratio between lifetimes of two different isotopes as well as the ratio of nuclear matrix elements. In this way, the theoretical uncertainties in the calculation of nuclear matrix elements can...

  5. Transport Properties through Double Barrier Structure in Graphene

    E-Print Network [OSTI]

    Ahmed Jellal; El Bouazzaoui Choubabi; Hocine Bahlouli; Abdullah Aljaafari

    2012-02-12

    The mode-dependent transmission of relativistic ballistic massless Dirac fermion through a graphene based double barrier structure is being investigated for various barrier parameters. We compare our results with already published work and point out the relevance of these findings to a systematic study of the transport properties in double barrier structures. An interesting situation arises when we set the potential in the leads to zero, then our 2D problem reduces effectively to a 1D massive Dirac equation with an effective mass proportional to the quantized wave number along the transverse direction. Furthermore we have shown that the minimal conductivity and maximal Fano factor remain insensitive to the ratio between the two potentials V_2/V_1=\\alpha.

  6. Transmissions in Graphene through Double Barriers and Periodic Potential

    E-Print Network [OSTI]

    Miloud Mekkaoui; El Bouâzzaoui Choubabi; Ahmed Jellal; Hocine Bahlouli

    2015-03-04

    Transmission of Dirac fermions through a chip of graphene under the effect of magnetic field and a time vibrating double barrier with frequency $w$ is investigated. Quantum interference within the oscillating barrier has an important effect on quasi-particles tunneling. A combination of both a time dependent potential and a magnetic field generate physical states whose energy is double quantified by the pair of integers $(n, l)$ with high degeneracy. The large number of modes that exist in the energy spectrum presents a colossal difficulty in numerical computations. Thus we were obliged to make a truncation and limit ourselves to the central $(n = 0)$ and two adjacent side band ($n=\\pm 1$).

  7. Double $J/?$ production in central diffractive processes at the LHC

    E-Print Network [OSTI]

    C. Brenner Mariotto; V. P. Goncalves

    2015-05-11

    In this paper we study the double $J/\\psi$ production in central diffractive processes considering the Resolved Pomeron model. Based on the nonrelativistic QCD (NRQCD) factorization formalism for the quarkonium production mechanism we estimate the rapidity and transverse momentum dependence of the cross section for the double $J/\\psi$ production in diffractive processes at LHC energies. The contributions of the color-singlet and color-octet channels are estimated and predictions for the total cross sections in the kinematical regions of the LHC experiments are also presented. Our results demonstrate that the contribution of central diffractive processes is not negligible and that its study can be useful to test the Resolved Pomeron model.

  8. Double Higgs mechanisms, supermassive stable particles and the vacuum energy

    E-Print Network [OSTI]

    Osvaldo P. Santillán; Luciano Gabbanelli

    2015-08-05

    In the present work it is shown that some specific double Higgs like mechanisms may have interesting cosmological applications. A hidden scenario which cast long lived super heavy particles together with an extremely light particle $a$ with mass $m_a\\sim 10^{-32}-10^{-33}$eV is presented. The potential energy of this particle models the vacuum energy density of the universe $\\rho_c\\simeq 10^{-47}\\;\\hbox{GeV}^4$. The construction of such scenario is non trivial since the presence of light particles may spoil the stability of the heavy particles. However, double Higgs mechanisms may be helpful for overcoming this problem. The hidden sector we propose include fermions with masses near the neutrino mass $m_\

  9. Origin of superstructures in (double) perovskite thin films

    SciTech Connect (OSTI)

    Shabadi, V. Major, M.; Komissinskiy, P.; Vafaee, M.; Radetinac, A.; Baghaie Yazdi, M.; Donner, W.; Alff, L.

    2014-09-21

    We have investigated the origin of superstructure peaks as observed by X-ray diffraction of multiferroic Bi(Fe{sub 0.5}Cr{sub 0.5})O{sub 3} thin films grown by pulsed laser deposition on single crystal SrTiO{sub 3} substrates. The photon energy dependence of the contrast between the atomic scattering factors of Fe and Cr is used to rule out a chemically ordered double perovskite Bi{sub 2}FeCrO{sub 6} (BFCO). Structural calculations suggest that the experimentally observed superstructure occurs due to unequal cation displacements along the pseudo-cubic [111] direction that mimic the unit cell of the chemically ordered compound. This result helps to clarify discrepancies in the correlations of structural and magnetic order reported for Bi{sub 2}FeCrO{sub 6}. The observation of a superstructure in itself is not a sufficient proof of chemical order in double perovskites.

  10. Double Beta Decay, Majorana Neutrinos, and Neutrino Mass

    E-Print Network [OSTI]

    Frank T. Avignone III; Steven R. Elliott; Jonathan Engel

    2007-11-26

    The theoretical and experimental issues relevant to neutrinoless double-beta decay are reviewed. The impact that a direct observation of this exotic process would have on elementary particle physics, nuclear physics, astrophysics and cosmology is profound. Now that neutrinos are known to have mass and experiments are becoming more sensitive, even the non-observation of neutrinoless double-beta decay will be useful. If the process is actually observed, we will immediately learn much about the neutrino. The status and discovery potential of proposed experiments are reviewed in this context, with significant emphasis on proposals favored by recent panel reviews. The importance of and challenges in the calculation of nuclear matrix elements that govern the decay are considered in detail. The increasing sensitivity of experiments and improvements in nuclear theory make the future exciting for this field at the interface of nuclear and particle physics.

  11. Double beta decay, Majorana neutrinos, and neutrino mass

    SciTech Connect (OSTI)

    Avignone, Frank T. III; Elliott, Steven R.; Engel, Jonathan [Department of Physics and Astronomy, University of South Carolina, Columbia, South Carolina 29208 (United States); Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27599-3255 (United States)

    2008-04-15

    The theoretical and experimental issues relevant to neutrinoless double beta decay are reviewed. The impact that a direct observation of this exotic process would have on elementary particle physics, nuclear physics, astrophysics, and cosmology is profound. Now that neutrinos are known to have mass and experiments are becoming more sensitive, even the nonobservation of neutrinoless double beta decay will be useful. If the process is actually observed, we will immediately learn much about the neutrino. The status and discovery potential of proposed experiments are reviewed in this context, with significant emphasis on proposals favored by recent panel reviews. The importance of and challenges in the calculation of nuclear matrix elements that govern the decay are considered in detail. The increasing sensitivity of experiments and improvements in nuclear theory make the future exciting for this field at the interface of nuclear and particle physics.

  12. The Search for Neutrinoless Double Beta Decay in CUORE

    E-Print Network [OSTI]

    L. M. Ejzak; for the CUORE Collaboration

    2009-10-15

    Understanding the nature of neutrino masses will require physics beyond the long-standing Standard Model of particle physics. Neutrinoless double beta decay experiments like the Cryogenic Underground Observatory for Rare Events (CUORE) are uniquely suited for probing the remaining mysteries of neutrino mass, particularly the question of the neutrino's Majorana nature. CUORE will be a next-generation experiment at the Laboratori Nazionali del Gran Sasso in Italy; it will consist of an array of 988 TeO2 detector crystals operated at ~10 mK, following the bolometric technique established by the Cuoricino experiment. It will look for the energy signal produced by the theoretically-predicted neutrinoless double beta decay in Te-130, and therefore reliable energy calibration of the detector is crucial to the experiment's success. We will present the most recent results from Cuoricino and discuss the current status of the CUORE project, with a particular emphasis on the development of the calibration system.

  13. Complementarity of Neutrinoless Double Beta Decay and Cosmology

    SciTech Connect (OSTI)

    Dodelson, Scott; Lykken, Joseph

    2014-03-20

    Neutrinoless double beta decay experiments constrain one combination of neutrino parameters, while cosmic surveys constrain another. This complementarity opens up an exciting range of possibilities. If neutrinos are Majorana particles, and the neutrino masses follow an inverted hierarchy, then the upcoming sets of both experiments will detect signals. The combined constraints will pin down not only the neutrino masses but also constrain one of the Majorana phases. If the hierarchy is normal, then a beta decay detection with the upcoming generation of experiments is unlikely, but cosmic surveys could constrain the sum of the masses to be relatively heavy, thereby producing a lower bound for the neutrinoless double beta decay rate, and therefore an argument for a next generation beta decay experiment. In this case as well, a combination of the phases will be constrained.

  14. Neutrinoless double {beta}-decay and neutrino mass hierarchies

    SciTech Connect (OSTI)

    Bilenky, S. M. [Scuola Internazionale Superiore di Studi Avanzati, I-34014 Trieste (Italy); Faessler, Amand; Gutsche, Thomas; Simkovic, Fedor [Institute fuer Theoretische Physik der Universitaet Tuebingen, D-72076 Tuebingen (Germany)

    2005-09-01

    In the framework of the seesaw mechanism the normal hierarchy is favorable for the neutrino mass spectrum. For this spectrum we present a detailed calculation of the half-lives of neutrinoless double {beta}-decay for several nuclei of experimental interest. The half-lives are evaluated by considering the most comprehensive nuclear matrix elements, which were obtained within the renormalized quasiparticle random phase approximation by the Bratislava-Caltech-Tuebingen group. The dependence of the half-lives on sin{sup 2}{theta}{sub 13} and the lightest neutrino mass is studied. We present also the results of the calculations of the half-lives of neutrinoless double {beta}-decay in the case of the inverted hierarchy of neutrino masses.

  15. Extra dimensions and neutrinoless double beta decay experiments

    SciTech Connect (OSTI)

    Gozdz, Marek; Kaminski, Wieslaw A.; Faessler, Amand [Theoretical Physics Department, Maria Curie-Sklodowska University, Lublin (Poland); Institute fuer Theoretische Physik, Universitaet Tuebingen, Auf der Morgenstelle 14, D-72076 Tuebingen (Germany)

    2005-05-01

    The neutrinoless double beta decay is one of the few phenomena, belonging to the nonstandard physics, which is extensively being sought for in experiments. In the present paper the link between the half-life of the neutrinoless double beta decay and theories with large extra dimensions is explored. The use of the sensitivities of currently planned 0{nu}2{beta} experiments: DAMA, CANDLES, COBRA, DCBA, CAMEO, GENIUS, GEM, MAJORANA, MOON, CUORE, EXO, and XMASS, gives the possibility for a nondirect 'experimental' verification of various extra dimensional scenarios. We discuss also the results of the Heidelberg-Moscow Collaboration. The calculations are based on the Majorana neutrino mass generation mechanism in the Arkani-Hamed-Dimopoulos-Dvali model.

  16. Symmetry causes a huge conductance peak in double quantum dots

    E-Print Network [OSTI]

    Robert S. Whitney; P. Marconcini; M. Macucci

    2009-02-18

    We predict a huge interference effect contributing to the conductance through large ultra-clean quantum dots of chaotic shape. When a double-dot structure is made such that the dots are the mirror-image of each other, constructive interference can make a tunnel barrier located on the symmetry axis effectively transparent. We show (via theoretical analysis and numerical simulation) that this effect can be orders of magnitude larger than the well-known universal conductance fluctuations and weak-localization (both less than a conductance quantum). A small magnetic field destroys the effect, massively reducing the double-dot conductance; thus a magnetic field detector is obtained, with a similar sensitivity to a SQUID, but requiring no superconductors.

  17. A short review of some double-parton scattering processes

    E-Print Network [OSTI]

    Szczurek, Antoni

    2015-01-01

    A few examples of quickly developing field of double parton scattering are discussed. We present arguments that the production of two pairs of charm quark-antiquark is the golden reaction to study the double parton scattering effects. We discuss briefly also mechanism of single parton scattering and show that it gives much smaller contribution to the $c \\bar c c \\bar c$ final state. In this context we discuss also the contribution of perturbative parton-splitting mechanism which should also be added to the conventional DPS mechanism. The presence of the letter leads to collision energy and other kinematical variables dependence of so-called $\\sigma_{eff}$. We briefly discuss production of four jets. We concentrate on estimation of the contribution of DPS for jets widely separated in rapidity. Finally we briefly mention about DPS effects in production of $W^+ W^-$.

  18. A short review of some double-parton scattering processes

    E-Print Network [OSTI]

    Antoni Szczurek

    2015-05-19

    A few examples of quickly developing field of double parton scattering are discussed. We present arguments that the production of two pairs of charm quark-antiquark is the golden reaction to study the double parton scattering effects. We discuss briefly also mechanism of single parton scattering and show that it gives much smaller contribution to the $c \\bar c c \\bar c$ final state. In this context we discuss also the contribution of perturbative parton-splitting mechanism which should also be added to the conventional DPS mechanism. The presence of the letter leads to collision energy and other kinematical variables dependence of so-called $\\sigma_{eff}$. We briefly discuss production of four jets. We concentrate on estimation of the contribution of DPS for jets widely separated in rapidity. Finally we briefly mention about DPS effects in production of $W^+ W^-$.

  19. Cascade of torus doubling bifurcations in a detuned laser

    SciTech Connect (OSTI)

    Krents, A A [S.P. Korolev Samara State Aerospace University, Samara (Russian Federation); Molevich, N E [Samara Branch of the P.N. Lebedev Physical Institute, Russian Academy of Sciences, Samara (Russian Federation)

    2009-08-31

    By using a simplified system of Maxwell-Bloch equations (with the adiabatically excluded polarisation of the medium), we studied the processes proceeding in the cross section of a light wave propagating in a wide-aperture laser emitting at the frequency detuned from the transition-line centre. It is shown that in the model under study the passage to the chaotic regime during a change in the wave propagation velocity across the aperture occurs via the doubling bifurcations of an ergodic two-dimensional torus. The spectrum of Lyapunov exponents is found and it is established that at bifurcation points a structurally unstable three-dimensional torus is produced, which gives rise to a stable doubled ergodic torus. (nonlinear optical phenomena)

  20. Electrical-assisted double side incremental forming and processes thereof

    SciTech Connect (OSTI)

    Roth, John; Cao, Jian

    2014-06-03

    A process for forming a sheet metal component using an electric current passing through the component is provided. The process can include providing a double side incremental forming machine, the machine operable to perform a plurality of double side incremental deformations on the sheet metal component and also apply an electric direct current to the sheet metal component during at least part of the forming. The direct current can be applied before or after the forming has started and/or be terminated before or after the forming has stopped. The direct current can be applied to any portion of the sheet metal. The electrical assistance can reduce the magnitude of force required to produce a given amount of deformation, increase the amount of deformation exhibited before failure and/or reduce any springback typically exhibited by the sheet metal component.