Sample records for tesla superconducting dipole

  1. CERN 6 Tesla superconducting persistent dipole/Filming an experiment/Synchrotron radiation from protons

    E-Print Network [OSTI]

    1979-01-01T23:59:59.000Z

    CERN 6 Tesla superconducting persistent dipole/Filming an experiment/Synchrotron radiation from protons

  2. EIGHT-TESLA SYNCHROTRON DIPOLES -- DESIGN ALTERNATIVES

    E-Print Network [OSTI]

    Gilbert, W.S.

    2011-01-01T23:59:59.000Z

    14, 1979 LBL -8410 EIGHT-TESLA SYNCHROTRON DIPOLES -- DESIGNprivately owned rights. EIGHT-TESLA SYNCHROTRON DIPOLES --bending magnets in the 4 to 5 tesla field range have been,

  3. A 6.4 TESLA DIPOLE MAGNET FOR THE SSC

    E-Print Network [OSTI]

    Taylor, C.E.

    2010-01-01T23:59:59.000Z

    Engineering, Volume 31 A 6.4 TESLA DIPOLE MAGNET FOR THE SSCR. SCANLAN SSC-MAG A 6.4 TESLA DIPOLE MAGiET FOR THE SSC* C.increa.ing up to . 28 tesla . - The resultins systematic

  4. Performance analysis of HD1: a 16 Tesla Nb3Sn dipole Magnet

    E-Print Network [OSTI]

    Mattafirri, S.

    2009-01-01T23:59:59.000Z

    Analysis of HD1: A 16 Tesla Nb 3 Sn Dipole Magnet S.of HD1b, an Upgraded 16 Tesla Nb 3 Sn Dipole Magnet”, This

  5. Test Results for HD1, a 16 Tesla Nb3Sn Dipole Magnet

    E-Print Network [OSTI]

    Lietzke, A.F.

    2011-01-01T23:59:59.000Z

    Design and Fabrication ofa 16 Tesla Nb 3 Sn Dipole Magnet",Test Results for HD 1, a 16 Tesla Nb 3 Sn Dipole Magnet A.F.and bore fields above 16 Tesla. II. MAGNET FEATURES AND TEST

  6. HD1: Design and Fabrication of a 16 Tesla Nb3Sn Dipole Magnet

    E-Print Network [OSTI]

    Hafalia, A.R.

    2011-01-01T23:59:59.000Z

    and Fabrication of a 16 Tesla Nb 3 Sn Dipole Magnet A .R.ge nerating fields above 16 Tesla in practical acceleratordesign fields above 10 Tesla. In a series of magnet tests,

  7. Achievement of 35 MV/m in the Superconducting Nine-Cell Cavities for TESLA 1

    E-Print Network [OSTI]

    Achievement of 35 MV/m in the Superconducting Nine-Cell Cavities for TESLA 1 L. Lilje2 , D. Kostin Electronvolt Superconducting Linear Accelerator TESLA is the only linear electron-positron collider project reliably achieved in the cavities of the TESLA Test Facility (TTF) accelerator. The upgrade of TESLA to 800

  8. Fabrication and Test Results of a Nb3Sn Superconducting Racetrack Dipole Magnet

    SciTech Connect (OSTI)

    Chow, K.; Dietderich, D.R.; Gourlay, S.A.; Gupta, R.; Harnden, W.; Lietzke, A. F.; McInturff, A.D.; Millos, G.A.; Morrison, L.; Morrison, M.; Scanlan, R.M.

    2000-02-06T23:59:59.000Z

    A 'proof-of-principle' Nb{sub 3}Sn superconducting dual-bore dipole magnet was built from racetrack coils, as a first step in a program to develop an economical, 15 Tesla, accelerator-quality magnet. The mechanical design and magnet fabrication procedures are discussed. No training was required to achieve temperature-dependent plateau currents, despite several thermal cycles that involved partial magnet disassembly and substantial pre-load variations. Subsequent magnets are expected to approach 15 Tesla with substantially improved conductor.

  9. A test of a 2 Tesla superconducting transmission line magnet system

    SciTech Connect (OSTI)

    Piekarz, Henryk; Carcagno, Ruben; Claypool, Brad; Foster, George W.; Hays, Steven L.; Huang, Yuenian; Kashikhin, Vladimir; Malamud, Ernest; Mazur, Peter O.; Nehring,; Oleck, Andrew; Rabehl, Roger; Schlabach, Phil; Sylvester, Cosmore; Velev, Gueorgui; Volk, James; /Fermilab; Wake, Masayoshi; /KEK, Tsukuba

    2005-09-01T23:59:59.000Z

    Superconducting transmission line magnet test system for an injector accelerator of a staged VLHC proton-proton colliding beam accelerator has been built and operated at Fermilab. The 1.5 m long, twin-aperture, combined function dipole magnet of 2 Tesla field is excited by a single turn 100 kA transmission line superconductor. The 100 kA dc current is generated using dc-dc switching converters powered by a bulk 240 kW supply. A pair of horizontally placed conventional leads facilitates transfer of this current to the magnet transmission line superconductor operating at liquid helium temperature. Fabrication of magnet components and magnet assembly work are described. The magnet test system and its operation are presented, and the performance is summarized.

  10. Test Results for HD1, a 16 Tesla Nb3Sn Dipole Magnet

    SciTech Connect (OSTI)

    Lietzke, A.F.; Bartlett, S.; Bish, P.; Caspi, S.; Chiesa, L.; Dietderich, D.; Ferracin, P.; Gourlay, S.A.; Goli, M.; Hafalia, R.R.; Higley, H.; Hannaford, R.; Lau, W.; Liggens, N.; Mattafirri, S.; McInturff, A.; Nyman, M.; Sabbi, G.; Scanlan, R.; Swanson, J.

    2003-10-01T23:59:59.000Z

    The Superconducting Magnet Group at Lawrence Berkeley National Laboratory has been developing the technology for using brittle superconductor in high-field accelerator magnets. HD1, the latest in a series of magnets, contains two, double-layer Nb{sub 3}Sn flat racetrack coils. This single-bore dipole configuration, using the highest performance conductor available, was designed and assembled for a 16 tesla conductor/structure/pre-stress proof-of-principle. With the combination of brittle conductor and high Lorentz stress, considerable care was taken to predict the magnet's mechanical responses to pre-stress, cool-down, and excitation. Subsequent cold testing satisfied expectations: Training started at 13.6 T, 83% of 'short-sample', achieved 90% in 10 quenches, and reached its peak bore field (16 T) after 19 quenches. The average plateau, {approx}92% of 'short-sample', appeared to be limited by 'stick-slip' conductor motions, consistent with the 16.2 T conductor 'lift-off' pre-stress that was chosen for this first test. Some lessons learned and some implications for future conductor and magnet technology development are presented and discussed.

  11. Test Results of HD1b, an upgraded 16 Tesla Nb3Sn DipoleMagnet

    SciTech Connect (OSTI)

    Lietzke, A.F.; Bartlett, S.E.; Bish, P.; Caspi, S.; Dietderich,D.; Ferracin, P.; Gourlay, S.; Hafalia, A.R.; Hannaford, C.R.; Higley,H.; Lau, W.; Liggins, N.; Mattafirri, S.; Nyman, M.; Sabbi, G.; Scanlan,R.; Swanson, J.

    2005-04-16T23:59:59.000Z

    The Superconducting Magnet Group at Lawrence Berkeley National Laboratory has been developing high-field, brittle-superconductor, accelerator magnet technology, in which the conductor's support system can significantly impact conductor performance (as well as magnet training). A recent H-dipole coil test (HD1) achieved a peak bore-field of 16 Tesla, using two, flat-racetrack, double-layer Nb{sub 3}Sn coils. However, its 4.5 K training was slow, with an erratic plateau at {approx}92% of its un-degraded ''short-sample'' expectation ({approx}16.6 T). Quench-origins correlated with regions where low conductor pre-stress had been expected (3-D FEM predictions and variations in 300 K coil-size). The coils were re-assembled with minor coil-support changes and re-tested as ''HD1b'', with a 185 MPa average pre-stress (30 MPa higher than HD1, with a 15-20 MPa pole-turn margin expected at 17 T). Training started higher (15.1 T), and quickly reached a stable, negligibly higher plateau at 16 T. After a thermal cycle, training started at 15.4 T, but peaked at 15.8 T, on the third attempt, before degrading to a 15.7 T plateau. The temperature dependence of this plateau was explored in a sub-atmospheric LHe bath to 3.0 K. Magnet performance data for both thermal cycles is presented and discussed, along with issues for future high-field accelerator magnet development.

  12. Design study of 15-Tesla RHQT Nb3Al block type dipole magnet

    SciTech Connect (OSTI)

    Yamada, R.; Ambrosio, G.; Barzi, E.; Kashikin, V.; Kikuchi, A.; Novitski, I.; Takeuchi, T.; Wake, M.; Zlobin, A.; /Fermilab /NIMC, Tsukuba /KEK, Tsukuba

    2005-09-01T23:59:59.000Z

    The design study of the block type 15-Tesla RHQT Nb{sub 3}Al dipole magnet, and its merits over Nb{sub 3}Sn magnets are presented. The copper stabilized RHQT Nb{sub 3}Al strand is now becoming commercially available for the application to the accelerator magnets. A 1 mm diameter RHQT Nb{sub 3}Al strand with filament size about 50 {mu}, non-copper Jc about 1000 A/mm{sup 2} at 15 Tesla at 4.2K, copper ratio of 50%, can now be produced over several hundred meters. The stress and strain characteristics of the Nb{sub 3}Al strand are superior to the Nb{sub 3}Sn strand. Another advantage is that it can tolerate a longitudinal strain up to 0.55%. The RHQT Nb{sub 3}Al Rutherford cable will have less chance of contamination of the stabilizer, compared to Nb{sub 3}Sn cable. These characteristics of the RHQT Nb{sub 3}Al will be beneficial for designing and producing 15-Tesla dipole magnets. An example 15-Tesla magnet cross section, utilizing the RHQT Nb{sub 3}Sn strand is presented. A systematic investigation on RHQT Nb{sub 3}Al strands, its Rutherford cables, and building a small racetrack magnet for cable testing are proposed.

  13. SRF 020128-01/TESLA Report 2002-01 The optimal shape of cells of a superconducting accelerating section

    E-Print Network [OSTI]

    1 SRF 020128-01/TESLA Report 2002-01 The optimal shape of cells of a superconducting accelerating.S.A. Abstract The shape of TESLA accelerating structure can be improved to decrease maximal surface magnetic. For the TESLA accelerating cavity, as reported in [1], these values are: 0.2max =accEE , 6.42max =accEH Oe

  14. 6. 4 Tesla dipole magnet for the SSC

    SciTech Connect (OSTI)

    Taylor, C.E.; Caspi, S.; Gilbert, W.; Meuser, R.; Mirk, K.; Peters, C.; Scanlan, R.; Dahl, P.; Cottingham, J.; Hassenzahl, W.

    1985-05-01T23:59:59.000Z

    A design is presented for a dipole magnet suitable for the proposed SSC facility. Test results are given for model magnets of this design 1 m long and 4.5 m long. Flattened wedge-shaped cables (''keystoned'') are used in a graded, two-layer ''cos theta'' configuration with three wedges to provide sufficient field uniformity and mechanical rigidity. Stainless steel collars 15 mm wide, fastened with rectangular keys, provide structural support, and there is a ''cold'' iron flux return. The outer-layer cable has 30 strands of 0.0255 in. dia NbTi multifilamentary wire with Cu/S.C. = 1.8, and the inner has 23 strands of .0318 in. dia wire with Cu/S.C. = 1.3. Performance data is given including training behavior, winding stresses, collar deformation, and field uniformity.

  15. THE TECHNOLOGY OF SUPERCONDUCTING ACCELERATOR DIPOLES

    E-Print Network [OSTI]

    Hassenzahl, W.V.

    2010-01-01T23:59:59.000Z

    properties of practical superconductors,2 2. their sta-winding from the superconductive to the resistive state. *I. II. III. IV. V. Superconducting Materials Conductor Matri

  16. Cryogenics for a 5 Tesla Superconducting Solenoid with Large Aperture at DESY

    SciTech Connect (OSTI)

    Gadwinkel, E.; Lierl, H.; Notz, D.; Schaffran, J.; Schoeneburg, B. [Deutsches Elektronen-Synchrotron, DESY, Hamburg, 22607 (Germany); Herzog, H. [Deutsches Elektronen-Synchrotron, DESY, Hamburg, 22607 (Germany); Linde Kryotechnik A.G., plant operation section at DESY, Pfungen, 8422 (Switzerland)

    2004-06-23T23:59:59.000Z

    A large aperture superconducting solenoid-magnet with fields up to 5.25 Tesla is being set up as high field test facility at DESY. It is used to measure prototype time projection chambers foreseen as detectors for a future high energy physics collider experiment. The new cryogenic supply of this magnet within the existing HERA cryogenic helium system is described. The cryogenic control, operation and results are outlined.

  17. Trapped field internal dipole superconducting motor generator

    DOE Patents [OSTI]

    Hull, John R. (Downers Grove, IL)

    2001-01-01T23:59:59.000Z

    A motor generator including a high temperature superconductor rotor and an internally disposed coil assembly. The motor generator superconductor rotor is constructed of a plurality of superconductor elements magnetized to produce a dipole field. The coil assembly can be either a conventional conductor or a high temperature superconductor. The superconductor rotor elements include a magnetization direction and c-axis for the crystals of the elements and which is oriented along the magnetization direction.

  18. Ris-R-1578(EN) Design of MgB2 superconducting dipole

    E-Print Network [OSTI]

    Risű-R-1578(EN) Design of MgB2 superconducting dipole magnet for particle beam transport-C. Grivel1 and N.H. Andersen1 Title: Design of MgB2 superconducting dipole magnet for particle beam. 2000 char.): A comprehensive analysis of the innovation potential of superconductivity at Risű

  19. SUPERCONDUCTING RF-DIPOLE DEFLECTING AND CRABBING CAVITIES

    SciTech Connect (OSTI)

    Delayen, Jean [ODU, JLAB; De Silva, Paygalage Subashini [ODU, JLAB

    2013-09-01T23:59:59.000Z

    Recent interests in designing compact deflecting and crabbing structures for future accelerators and colliders have initiated the development of novel rf structures. The superconducting rf-dipole cavity is one of the first compact designs with attractive properties such as higher gradients, higher shunt impedance, the absence of lower order modes and widely separated higher order modes. Two rf-dipole designs of 400 MHz and 499 MHz have been designed, fabricated and tested as proof-of-principle designs of compact deflecting and crabbing cavities for the LHC high luminosity upgrade and Jefferson Lab 12 GeV upgrade. The first rf tests have been performed on the rf-dipole geometries at 4.2 K and 2.0 K in a vertical test assembly with excellent results. The cavities have achieved high gradients with high intrinsic quality factors, and multipacting levels were easily processed.

  20. Structural analysis of superconducting dipole prototype for HIAF

    E-Print Network [OSTI]

    Zhang, Xiaoying; Ni, Dongsheng; Chen, Yuquan; Wu, Wei; Ma, Lizhen

    2015-01-01T23:59:59.000Z

    The High Intensity Heavy-Ion Accelerator Facility is a new project in the Institute of Modern Physics. The dipole magnets of all rings are conceived as fast cycled superconducting magnet with high magnetic field and large gap, the warm iron and superconducting coil structure (superferric) is adopted. The reasonable structure design of coil and cryostat is very important for reliable operation. Based on the finite element software ANSYS, the mechanical analysis of electromagnetic stress, the thermal stress in the cooling down and the stress in the pumping are showed in detail. According to the analysis result, the supporter structure is the key problem of coil system. With reasonable support's structure design, the stress and the deformation of coil structure can be reduced effectively, which ensure the stable operation of superconducting coil system.

  1. HD1: Design and Fabrication of a 16 Tesla Nb3Sn DipoleMagnet

    SciTech Connect (OSTI)

    Hafalia, A.R.; Bartlett, S.E.; Capsi, S.; Chiesa, L.; Dietderich,D.R.; Ferracin, P.; Goli, M.; Gourlay, S.A.; Hannaford, C.R.; Highley,H.; Lietzke, A.F.; Liggins, N.; Mattafirri, S.; McInturff, A.D.; Nyman,M.; Sabbi, G.L.; Scanlan, R.M.; Swanson, J.

    2003-11-10T23:59:59.000Z

    The Lawrence Berkeley National Laboratory (LBNL) Superconducting Magnet Group has completed the design, fabrication and test of HD1, a 16 T block-coil dipole magnet. State of the art Nb{sub 3}Sn conductor was wound in double-layer racetrack coils and supported by an iron yoke and a tensioned aluminum shell. In order to prevent conductor movement under magnetic forces up to the design field, a coil pre-stress of 150 MPa was required. To achieve this level without damaging the brittle conductor, the target stress was generated during cool-down to 4.2 K by exploiting the thermal contraction differentials between yoke and shell. Accurate control of the shell tension during assembly was obtained using pressurized bladders and interference load keys. An integrated 3D CAD model was used to optimize magnetic and mechanical design and analysis.

  2. Performance analysis of HD1: a 16 Tesla Nb3Sn dipole Magnet

    SciTech Connect (OSTI)

    Mattafirri, S.; Bartlett, S.E.; Bish, P.A.; Caspi, S.; Dietderich, D.R.; Ferracin, P.; Gourlay, S.A.; Hannaford, C.R.; Hafalia, A.R.; Lau, W.G.; Lietzke, A.F.; McInturff, A.D.; Nyman, M.; Sabbi, G.L.; Scanlan, R.M.

    2005-06-01T23:59:59.000Z

    The Superconducting Magnet Group at Lawrence Berkeley National Laboratory (LBNL) has been developing technology for high field accelerator magnets from brittle conductors. HD1 is a single bore block dipole magnet using two, double-layer Nb{sub 3}Sn flat racetrack coils. The magnet was tested in October 2003 and reached a bore peak field of 16 T (94.5% of short sample). The average quench current plateau appeared to be limited by 'stick slip' conductor motions. Diagnostics recorded quench origins and preload distributions. Cumulative deformation of the mechanical structure has been observed. Quench velocity in different field regions has been measured and compared with model predictions. The results obtained during the HD1 test are presented and discussed.

  3. Presented at the Applied Superconductivity Conference, Houston, TX August 4-9, 2002 1 Superconducting Magnets for the `International

    E-Print Network [OSTI]

    Ohta, Shigemi

    ) · the High Energy Storage Ring (HESR) Index Terms--Antiproton beams, fast-ramped superconduct- ing to develop dipole magnets with maximum fields of 2 and 4 Tesla and dipole ramp rates of 4 T/s and 1 T). This magnet has been operated at 4 T/s up to a field of 2 Tesla. Reduced losses and im- proved magnetic field

  4. FEB 19, 2001 TESLA-2001-17

    E-Print Network [OSTI]

    ­i­ FEB 19, 2001 TESLA-2001-17 CONCEPTUAL DESIGN FOR THE FINAL FOCUS QUADRUPOLE MAGNETS FOR TESLA A a preliminary design of the superconducting final focusing quadrupole magnets for TESLA and all their associated Electron volts Superconducting Linear Accelerator (TESLA) is an electron/positron linear collider

  5. FEB 19, 2001 TESLA-2001-17

    E-Print Network [OSTI]

    ­i­ FEB 19, 2001 TESLA-2001-17 CONCEPTUAL DESIGN FOR THE FINAL FOCUS QUADRUPOLE MAGNETS FOR TESLA A a preliminary design of the superconducting final focusing quadrupole magnets for TESLA and all their associated The Tera Electron volts Superconducting Linear Accelerator (TESLA) is an electron/positron linear collider

  6. Test of a 1.8 Tesla, 400 Hz Dipole for a Muon Synchrotron

    E-Print Network [OSTI]

    D. J. Summers; L. M. Cremaldi; T. L. Hart; L. P. Perera; M. Reep; H. Witte; S. Hansen; M. L. Lopes; J. Reidy, Jr.

    2012-07-28T23:59:59.000Z

    A 1.8 T dipole magnet using thin grain oriented silicon steel laminations has been constructed as a prototype for a muon synchrotron ramping at 400 Hz. Following the practice in large 3 phase transformers and our own Opera-2d simulations, joints are mitred to take advantage of the magnetic properties of the steel which are much better in the direction in which the steel was rolled. Measurements with a Hysteresigraph 5500 and Epstein frame show a high magnetic permeability which minimizes stored energy in the yoke allowing the magnet to ramp quickly with modest voltage. Coercivity is low which minimizes hysteresis losses. A power supply with a fast Insulated Gate Bipolar Transistor (IGBT) switch and a capacitor was constructed. Coils are wound with 12 gauge copper wire. Thin wire and laminations minimize eddy current losses. The magnetic field was measured with a peak sensing Hall probe.

  7. Test of a 1.8 Tesla, 400 Hz Dipole for a Muon Synchrotron

    SciTech Connect (OSTI)

    Summers, D.J.; Cremaldi, L.M.; Hart, T.L.; Perera, L.P.; Reep, M.; /Mississippi U.; Witte, H.; /Brookhaven; Hansen, S.; Lopes, M.L.; /Fermilab; Reidy Jr., J.; /Oxford High School

    2012-05-01T23:59:59.000Z

    A 1.8 T dipole magnet using thin grain oriented silicon steel laminations has been constructed as a prototype for a muon synchrotron ramping at 400 Hz. Following the practice in large 3 phase transformers and our own Opera-2d simulations, joints are mitred to take advantage of the magnetic properties of the steel which are much better in the direction in which the steel was rolled. Measurements with a Hysteresigraph 5500 and Epstein frame show a high magnetic permeability which minimizes stored energy in the yoke allowing the magnet to ramp quickly with modest voltage. Coercivity is low which minimizes hysteresis losses. A power supply with a fast Insulated Gate Bipolar Transistor (IGBT) switch and a capacitor was constructed. Coils are wound with 12 gauge copper wire. Thin wire and laminations minimize eddy current losses. The magnetic field was measured with a peak sensing Hall probe.

  8. HD1: Design and Fabrication of a 16 Tesla Nb3Sn Dipole Magnet

    SciTech Connect (OSTI)

    Hafalia, A.R.; Barlett, S.E.; Caspi, S.; Chiesa, L.; Dietderich, D.R.; Ferracin, P.; Goli, M.; Gourlay, S.A.; Hannaford, C.R.; Higley, H.; Lietzke, A.F.; Liggins, N.; Mattafirri, S.; McInturff, A.D.; Myman, M.; Sabbi, G.L.; Scanlan, R.M.; Swanson, J.

    2003-10-01T23:59:59.000Z

    The Lawrence Berkeley National Laboratory (LBNL) Supcrconducting Magnet Group has completed the design, fabrication and tcst of HD1, a 16 T block-coil dipole magnet. State of the art Nb{sub 3}Sn conductor was wound in double-layer racetrack coils and supported by an iron yoke and a tensioned aluminum shell. In order to prevent conductor movement under magnetic forces up to the design field, a coil prestress of 150 MPa was required. To achieve this level without damaging the brittle conductor, the target stress was generated during cool-down to 4.2 K by exploiting the thermal contraction differentials between yoke and shell. Accurate control of the shell tension during assembly was obtained using pressurized bladders and interference load keys. An integrated 3D CAD model was used to optimize magnetic and mechanical design and analysis.

  9. Interaction between an electric charge and a magnetic dipole of any kind (permanent, para- or dia- magnetic or superconducting)

    E-Print Network [OSTI]

    Coïsson, R

    2015-01-01T23:59:59.000Z

    The interaction between point charge and magnetic dipole is usually considered only for the case of a rigid ferromagnetic dipole (constant-current): here the analysis of force, momentum and energy (including the energy provided by the internal current generator) is generalised to any magnetic dipole behaviour: rigid, paramagnetic, diamagnetic or superconducting (perfectly diamagnetic).

  10. Fabrication and Test Results of a Prototype, Nb3Sn Superconducting Racetrack Dipole Magnet

    SciTech Connect (OSTI)

    Gourlay, S. A.; Chow, K.; Dietderich, D.R.; Gupta, R.; Hannaford, R.; Harnden, W.; Lietzke, A.; McInturff, A.D.; Millos, G.A.; Morrison, L.; Morrison, M.; Scanlan, R.M.

    1998-09-01T23:59:59.000Z

    A prototype, Nb{sub 3}Sn superconducting magnet, utilizing a racetrack coil design has been built and tested. This magnet represents the first step in a recently implemented program to develop a high field, accelerator quality magnet. This magnet was constructed with coils wound from conductor developed for the ITER project, limiting the magnet to a field of 6-7 Tesla. Subsequent magnets in the program will utilize improved conductor, culminating in a magnet design capable of producing fields approaching 15 Tesla. The simple geometry is more suitable for the use of brittle superconductors necessary to eventually reach high field levels. In addition, fewer and simpler parts are used in fabricating these coils compared with the more conventional cosine theta cross section coils. The general fabrication steps, mechanical design and quench performance are discussed.

  11. The TESLA Detector

    E-Print Network [OSTI]

    Klaus Moenig

    2001-11-05T23:59:59.000Z

    For the superconducting linear collider TESLA a multi purpose detector has been designed. This detector is optimised for the important physics processes expected at a next generation linear collider up to around 1 TeV and is designed for the specific environment of a superconducting collider.

  12. Status of the TESLA Test Facility Linac H. Weise, for the TESLA Collaboration

    E-Print Network [OSTI]

    Status of the TESLA Test Facility Linac H. Weise, for the TESLA Collaboration Deutsches Elektronen-Synchrotron DESY D-22603 Hamburg, Germany Abstract The TTF linac, a major effort of the TESLA Test Facility, is now GeV collider is the usage of superconducting (s.c.) accelerating structures. The international TESLA

  13. PERFORMANCE OF THE TESLA TEST FACILITY LINAC for the TESLA Collaboration

    E-Print Network [OSTI]

    PERFORMANCE OF THE TESLA TEST FACILITY LINAC P. Castro for the TESLA Collaboration Abstract In order to test the performance of a superconducting linac, the TESLA Collaboration has built and operated for the TESLA design. Results of recent running periods will be summarized in this paper. 1 INTRODUCTION

  14. TESLA Report 2003-28 TESLA cavity modeling and digital implementation

    E-Print Network [OSTI]

    TESLA Report 2003-28 TESLA cavity modeling and digital implementation with FPGA technology solution, Warsaw University of Technology Stefan Simrock TESLA, DESY, Hamburg ABSTRACT The cavity resonator modeling for the TESLA - TeV­Energy Superconducting Linear Accelerator project is initially introduced

  15. Proposal for the Award of a Contract for the Supply, Installation and Commissioning of Three Hydraulic Presses for the Assembly and Welding of the LHC Superconducting Dipole Magnets

    E-Print Network [OSTI]

    1998-01-01T23:59:59.000Z

    Proposal for the Award of a Contract for the Supply, Installation and Commissioning of Three Hydraulic Presses for the Assembly and Welding of the LHC Superconducting Dipole Magnets

  16. Proposal for the Award of a Contract for the Supply, Installation and Commissioning of a Hydraulic Press for Collaring the LHC Superconducting Dipole Magnets

    E-Print Network [OSTI]

    1996-01-01T23:59:59.000Z

    Proposal for the Award of a Contract for the Supply, Installation and Commissioning of a Hydraulic Press for Collaring the LHC Superconducting Dipole Magnets

  17. Proposal for the Award of a Contract for the Supply, Installation and Commissioning of a Hydraulic Press for Collaring the LHC Superconducting Dipole Coils

    E-Print Network [OSTI]

    1997-01-01T23:59:59.000Z

    Proposal for the Award of a Contract for the Supply, Installation and Commissioning of a Hydraulic Press for Collaring the LHC Superconducting Dipole Coils

  18. Conceptual design of a 2 tesla superconducting solenoid for the Fermilab D{O} detector upgrade

    SciTech Connect (OSTI)

    Brzezniak, J.; Fast, R.W.; Krempetz, K.

    1994-05-01T23:59:59.000Z

    This paper presents a conceptual design of a superconducting solenoid to be part of a proposed upgrade for the D0 detector. This detector was completed in 1992, and has been taking data since then. The Fermilab Tevatron had scheduled a series of luminosity enhancements prior to the startup of this detector. In response to this accelerator upgrade, efforts have been underway to design upgrades for D0 to take advantage of the new luminosity, and improvements in detector technology. This magnet is conceived as part of the new central tracking system for D0, providing a radiation-hard high-precision magnetic tracking system with excellent electron identification.

  19. Design, Fabrication, and Test of a Superconducting Dipole Magnet Based on Tilted Solenoids

    SciTech Connect (OSTI)

    Caspi, S.; Dietderich, D. R.; Ferracin, P.; Finney, N. R.; Fuery, M. J.; Gourlay, S. A.; Hafalia, A. R.

    2007-06-01T23:59:59.000Z

    It can be shown that, by superposing two solenoid-like thin windings that are oppositely skewed (tilted) with respect to the bore axis, the combined current density on the surface is 'cos-theta' like and the resulting magnetic field in the bore is a pure dipole. As a proof of principle, such a magnet was designed, built and tested as part of a summer undergraduate intern project. The measured field in the 25mm bore, 4 single strand layers using NbTi superconductor, exceeded 1 T. The simplicity of this high field quality design, void of typical wedges end-spacers and coil assembly, is especially suitable for insert-coils using High Temperature Superconducting wire as well as for low cost superconducting accelerator magnets for High Energy Physics. Details of the design, construction and test are reported.

  20. Structural performance of the first SSC (Superconducting Super Collider) Design B dipole magnet

    SciTech Connect (OSTI)

    Nicol, T.H.

    1989-09-01T23:59:59.000Z

    The first Design B Superconducting Super Collider (SSC) dipole magnet has been successfully tested. This magnet was heavily instrumented with temperature and strain gage sensors in order to evaluate its adherence to design constraints and design calculations. The instrumentation and associated data acquisition system allowed monitoring of the magnet during cooldown, warmup, and quench testing. This paper will focus on the results obtained from structural measurements on the suspension system during normal and rapid cooldowns and during quench studies at full magnet current. 4 refs., 9 figs.

  1. Design development for the 50mm Superconducting Super Collider dipole cryostat

    SciTech Connect (OSTI)

    Nicol, T.H.

    1991-03-01T23:59:59.000Z

    The cryostat of a Superconducting Super Collider (SSC) dipole magnet consists of all magnet components except the magnet assembly itself. It serves to support the magnet accurately and reliably within the vacuum vessel, provide all required cryogenic piping, and to insulate the cold mass from heat radiated and conducted from the environment. It must function reliably during storage, shipping and handling, normal magnet operation, quenches, and seismic excitations, and must be manufacturable at low cost. The major components of the cryostat are the vacuum vessel, thermal shields, multilayer insulation system, cryogenic piping, interconnections, and suspension system. The overall design of a cryostat for superconducting accelerator magnets requires consideration of fluid flow, proper selection of materials for their thermal and structural performance at both ambient and operating temperature, and knowledge of the environment to which the magnets will be subjected over the course their expected operating life. This paper describes the design of the current 50mm SSC collider dipole cryostat and includes discussions on the structural and thermal considerations involved in the development of each of the major systems. Where appropriate, comparisons will be made with the 40mm cryostat. 7 refs., 5 figs., 4 tabs.

  2. Cold RF test and associated mechanical features correlation of a TESLA-style 9-cell superconducting niobium cavity built in China

    SciTech Connect (OSTI)

    Dai, Jing; Quan, Sheng-Wen; Zhang, Bao-Cheng; Lin, Lin; Hao, Jian-Kui; Zhu, Feng; Xu, Wen-Can; He, Fei-Si; Jin, Song; Wang, Fang; Liu, Ke-Xin; Geng, R L

    2012-02-01T23:59:59.000Z

    The RF performance of a 1.3 GHz 9-cell superconducting niobium cavity was evaluated at cryogenic temperatures following surface processing by using the standard ILC-style recipe. The cavity is a TESLA-style 9-cell superconducting niobium cavity, with complete end group components including a higher order mode coupler, built in China for practical applications. An accelerating gradient of 28.6 MV/m was achieved at an unloaded quality factor of 4 x 10{sup 9}. The morphological property of mechanical features on the RF surface of this cavity was characterized through optical inspection. Correlation between the observed mechanical features and the RF performance of the cavity is attempted.

  3. Cryogenic Test of a 750 MHz Superconducting RF Dipole Crabbing Cavity

    SciTech Connect (OSTI)

    Castilla, Alejandro [ODU; Delayen, Jean R. [ODU, JLAB; Park, HyeKyoung [JLAB

    2014-07-01T23:59:59.000Z

    A superconducting rf dipole cavity has been designed to address the challenges of a high repetition rate (750 MHz), high current for both electron/ion species (0.5/3 A per bunch), and large crossing angle (50 mrad) at the interaction points (IPs) crabbing system for the Medium Energy Electron-Ion Collider (MEIC) proposed by Jefferson Lab. The cavity prototype built at Niowave, Inc. has been tested at the Jefferson Lab facilities. In this work we present a detailed analysis of the prototype cavity performance at 4 K and 2 K, corroborating the absence of hard multipacting barriers that could limit the desired transverse fields, along with the surface resistance (Rs) temperature dependency.

  4. Accelerator Quality HTS Dipole Magnet Demonstrator Designs for the EuCARD-2, 5 Tesla 40 mm Clear Aperture Magnet

    E-Print Network [OSTI]

    Kirby, GA; Ballarino, A; Bottura, L; Chouika, N; Clement, S; Datskov, V; Fajardo, L; Fleiter, J; Gauthier, R; Gentini, L; Lambert, L; Lopes, M; Perez, JC; de Rijk, G; Rijllart, A; Rossi, L; ten Kate, H; Durante, M; Fazilleau, P; Lorin, C; Härö, E; Stenvall, A; Caspi, S; Marchevsky, M; Goldacker, W; Kario, A

    2015-01-01T23:59:59.000Z

    Future high-energy accelerators will need very high magnetic fields in the range of 20 T. The EuCARD-2 work-package-10 is a collaborative push to take HTS materials into an accelerator quality demonstrator magnet. The demonstrator will produce 5 T standalone and between 17 T and 20 T, when inserted into the 100 mm aperture of Fresca-2 high field out-sert magnet. The HTS magnet will demonstrate the field strength and field quality that can be achieved. An effective quench detection and protection system will have to be developed to operate with the HTS superconducting materials. This paper presents a ReBCO magnet design using multi strand Roebel cable that develops a stand-alone field of 5 T in a 40 mm clear aperture and discusses the challenges associated with good field quality using this type of material. A selection of magnet designs is presented as result of a first phase of development.

  5. Accelerator Quality HTS Dipole Magnet Demonstrator designs for the EuCARD-2, 5 Tesla 40 mm Clear Aperture Magnet

    E-Print Network [OSTI]

    Kirby, G; Ballarino, A; Bottura, L; Chouika, N; Clement, S; Datskov, V; Fajardo, L; Fleiter, J; Gauthier, R; Lambert, L; Lopes, M; Perez, J; DeRijk, G; Rijllart, A; Rossi, L; Ten Kate, H; Durante, M; Fazilleau, P; Lorin, C; Haro, E; Stenvall, A; Caspi, S; Marchevsky, M; Goldacker, W; Kario, A

    2014-01-01T23:59:59.000Z

    Future high-energy accelerators will need very high magnetic fields in the range of 20 T. The EuCARD-2 work-package-10 is a collaborative push to take HTS materials into an accelerator quality demonstrator magnet. The demonstrator will produce 5 T standalone and between 17 T and 20 T, when inserted into the 100 mm aperture of Fresca-2 high field out-sert magnet. The HTS magnet will demonstrate the field strength and field quality that can be achieved. An effective quench detection and protection system will have to be developed to operate with the HTS superconducting materials. This paper presents a ReBCO magnet design using multi strand Roebel cable that develops a stand-alone field of 5 T in a 40 mm clear aperture and discusses the challenges associated with good field quality using this type of material. A selection of magnet designs is presented as result of a first phase of development.

  6. Field quality measurements of a 2-Tesla transmission line magnet

    SciTech Connect (OSTI)

    Velev, G.V.; Foster, W.; Kashikhin, V.; Mazur, P.; Oleck, A.; Piekarz, H.; Schlabach, P.; Sylvester, C.; /Fermilab; Wake, M.; /KEK, Tsukuba

    2005-09-01T23:59:59.000Z

    A prototype 2-Tesla superconducting transmission line magnet for future hadron colliders was designed, built and tested at Fermilab. The 1.5 m long, combined-function gradient-dipole magnet has a vertical pole aperture of 20 mm. To measure the magnetic field quality in such a small magnet aperture, a specialized rotating coil of 15.2 mm diameter, 0.69 m long was fabricated. Using this probe, a program of magnetic field quality measurements was successfully performed. Results of the measurements are presented and discussed.

  7. DESIGN OF A 10-T SUPERCONDUCTING DIPOLE MAGNET USING NIOBIUM-TIN CONDUCTOR

    E-Print Network [OSTI]

    Taylor, C.

    2011-01-01T23:59:59.000Z

    DIPOLE HAGNET USING NIOBIUM-TIN CONOOCTOR' C. Taylor, R.DIPOLE MAGNET USING NIOBIUM-TIN CONDUCTOR C. Taylor, R.slid tooling for the niobium- tin magnet .sre on halld, and

  8. PERFORMANCE STATUS OF THE RF-GUN BASED INJECTOR OF THE TESLA TEST FACILITY LINAC

    E-Print Network [OSTI]

    PERFORMANCE STATUS OF THE RF-GUN BASED INJECTOR OF THE TESLA TEST FACILITY LINAC S. SchreiberÂŁ for the TESLA Collaboration, DESY, 22603 Hamburg, Germany Abstract The TESLA Test Facility Linac (TTFL) at DESY uses two modules with 8 TESLA superconducting accelerat- ing structures each to accelerate an electron

  9. THE CRYOGENIC SYSTEM OF TESLA S. Wolff, DESY, Notkestr. 85, 22607 Hamburg, Germany

    E-Print Network [OSTI]

    THE CRYOGENIC SYSTEM OF TESLA S. Wolff, DESY, Notkestr. 85, 22607 Hamburg, Germany for the TESLA collaboration Abstract TESLA, a 33 km long 500 GeV centre-of-mass energy superconducting linear collider The 33 km long e+ e- linear collider TESLA (Tera eV Energy Superconductiong Linear Accelerator) with 500

  10. TESLA Report 1998-28 TESLA Report 1998-28

    E-Print Network [OSTI]

    TESLA Report 1998-28 #12;TESLA Report 1998-28 #12;TESLA Report 1998-28TESLA Report 1998-28TESLA Report 1998-28 Page 3 TESLA Report 1998-28 Page 1 #12;TESLA Report 1998-28TESLA Report 1998-28TESLA Report 1998-28 Page 4 TESLA Report 1998-28 Page 2 #12;TESLA Report 1998-28TESLA Report 1998-28TESLA

  11. TESLA Report 1997-22 TESLA Report 1997-22

    E-Print Network [OSTI]

    TESLA Report 1997-22 #12;TESLA Report 1997-22 #12;TESLA Report 1997-22 #12;TESLA Report 1997-22 #12;TESLA Report 1997-22 #12;TESLA Report 1997-22 #12;TESLA Report 1997-22 #12;TESLA Report 1997-22 #12;TESLA Report 1997-22 #12;TESLA Report 1997-22 #12;TESLA Report 1997-22 #12;TESLA Report 1997-22 #12

  12. Dipole-Induced Vortex Ratchets in Superconducting Films with Arrays of Micromagnets C. C. de Souza Silva,1,2,* A. V. Silhanek,1

    E-Print Network [OSTI]

    Moshchalkov, Victor V.

    Dipole-Induced Vortex Ratchets in Superconducting Films with Arrays of Micromagnets C. C. de Souza. By carrying out transport measurements with ac drive, we observed experimentally a recently predicted ratchet on the phenomenon known as ratchet effect [8]. As recently proposed by Carneiro [9], a different way to create

  13. Use of an elliptical aperture to control saturation in closely-coupled, cold iron, superconducting dipole magnets

    SciTech Connect (OSTI)

    Morgan, G.

    1985-01-01T23:59:59.000Z

    The high fields permitted by superconducting windings result in saturation of closely-coupled iron in dipole and quadrupole beam transport magnets. Coupland suggested using a triangular cutout at the poles to reduce the change in the sextupole (b/sub 2/) term due to saturation. The use of an elliptical aperture in a close-coupled dipole for the Relativistic Heavy Ion Collider (RHIC) has been studied using the BNL computer program MDP (a version of GFUN). The ellipse aspect ratio was varied while holding the horizontal (minor) radius constant. The proper aspect ratio gives no shift in b/sub 2/ sue to saturation, and a reduction in the b/sub 4/ shift. A modification of the ellipse also reduces b/sub 4/. The elliptical aperture introduces a large b/sub 2/ term at low field which must be compensated for by the coil design. A practical coil design which does this for the RHIC magnet is presented. 5 refs., 2 figs., 3 tabs.

  14. A Proposal for a TESLA Accelerator Module Test Facility W.D.Moeller, B.Petersen, B.Sparr

    E-Print Network [OSTI]

    1 A Proposal for a TESLA Accelerator Module Test Facility W.D.Moeller, B.Petersen, B.Sparr Deutsches Elektronen Synchrotron TESLA Report No. 2001-08 Abstract The Tera-eV Energy Superconducting Linear Accelerator (TESLA), a 32 km long superconducting linear electron/positron collider of 500 GeV (upgradeable

  15. Studies of time dependence of fields in TEVATRON superconducting dipole magnets

    SciTech Connect (OSTI)

    Hanft, R.W.; Brown, B.C.; Herrup, D.A.; Lamm, M.J.; McInturff, A.D.; Syphers, M.J.

    1988-08-22T23:59:59.000Z

    The time variation in the magnetic field of a model Tevatron dipole magnet at constant excitation current has been studied. Variations in symmetry allowed harmonic components over long time ranges show a log t behavior indicative of ''flux creep.'' Both short time range and long time range behavior depend in a detailed way on the excitation history. Similar effects are seen in the remnant fields present in full-scale Tevatron dipoles following current ramping. Both magnitudes and time dependences are observed to depend on details for the ramps, such as ramp rate, flattop duration, and number of ramps. In a few magnets, variations are also seen in symmetry unallowed harmonics. 9 refs., 10 figs.

  16. Experimental evaluation of vertically versus horizontally split yokes for SSC (Superconducting Super Collider) dipole magnets

    SciTech Connect (OSTI)

    Strait, J.; Coulter, K.; Jaffery, T.; Kerby, J.; Koska, W.; Lamm, M.J.

    1990-05-03T23:59:59.000Z

    The yoke in SSC dipole magnets provides mechanical support to the collared coil as well as serving as a magnetic element. The yoke and skin are used to increase the coil prestress and reduce collar deflections under excitation. Yokes split on the vertical or horizontal mid-plane offer different advantages in meeting these objectives. To evaluate the relative merits of the two configuration a 1.8 m model dipole was assembled and tested first with horizontally split and then with vertically split yoke laminations. The magnet was extensively instrumented to measure azimuthal and axial stresses in the coil and the cold mass skin resulting from cooldown and excitation. Mechanical behavior of this magnet with each configuration is compared with that of other long and short models and with calculations. 13 refs., 5 figs.

  17. Stress Management as an Enabling Technology for High-Field Superconducting Dipole Magnets

    E-Print Network [OSTI]

    Holik, Eddie Frank

    2014-06-03T23:59:59.000Z

    consistently challenged my understanding and drove me to be a better scientist. v NOMENCLATURE A15 Intermetallic superconducting compounds with A3B chemical formula AC Alternating Current AFRD Accelerator and Fusion Research Division of LBNL ARL... Research Program lbf Pounds of Force LBNL Lawrence Berkeley National Lab LCZ Inductance Capacitance Impedance LE Lead End LHC Large Hadron Collider LN2 Liquid Nitrogen MIG Metal Inert Gas MJR Modified Jelly Roll MOAG Mother Of All Grounds...

  18. OPERATIONAL EXPERIENCE WITH THE TEST FACILITIES FOR TESLA H. Weise, DESY, Hamburg, Germany

    E-Print Network [OSTI]

    OPERATIONAL EXPERIENCE WITH THE TEST FACILITIES FOR TESLA H. Weise, DESY, Hamburg, Germany Abstract The TESLA superconducting electron-positron linear collider with an integrated X-ray laser laboratory government in matters of science. In preparation of this, the TESLA Test Facility was set up at DESY. More

  19. FIRST EXPERIMENTS WITH THE RF GUN BASED INJECTOR FOR THE TESLA TEST FACILITY LINAC

    E-Print Network [OSTI]

    FIRST EXPERIMENTS WITH THE RF GUN BASED INJECTOR FOR THE TESLA TEST FACILITY LINAC S. Schreiber for the TESLA Collaboration, DESY, 22603 Hamburg, Germany Abstract During 1997 and 1998 a first accelerator module was tested successfully at the TESLA Test Facility Linac (TTFL) at DESY. Eight superconducting

  20. TESLA Report 2005-20 8-Channel, FPGA based, DSP Integrated

    E-Print Network [OSTI]

    TESLA Report 2005-20 8-Channel, FPGA based, DSP Integrated Cavity Simulator & Controller for VUV superconducting, narrowband niobium cavity, originally considered for the TTF and TESLA in DESY, Hamburg (now of the LLRF control system for the TESLA Test Facility (now associated with the VUV FEL machine). The device

  1. TESLA Polarimeters

    E-Print Network [OSTI]

    V. Gharibyan; N. Meyners; K. P. Schuler

    2003-10-22T23:59:59.000Z

    We describe a study of high-energy Compton beam polarimeters for the future e+e- linear collider machine TESLA. A segment of the beam delivery system has been identified, which is aligned with the e+e- collision axis and which has a suitable configuration for high-quality beam polarization measurements. The laser envisaged for the polarimeter is similar to an existing facility at DESY. It delivers very short pulses in the 10 ps, 10-100uJ regime and operates with a pattern that matches the pulse and bunch structure of TESLA. This will permit very fast and accurate measurements and an expeditious tune-up of the spin manipulators at the low-energy end of the linac. Electron detection in the multi-event regime will be the principle operating mode of the polarimeter. Other possible operating modes include photon detection and single-event detection for calibration purposes. We expect an overall precision of dP/P=0.5% for the measurement of the beam polarization.

  2. Edison vs. Tesla

    SciTech Connect (OSTI)

    Hogan, Kathleen; Wallace, Hal; Ivestor, Rob

    2013-11-20T23:59:59.000Z

    As Edison vs. Tesla week heats up at the Energy Department, we are exploring the rivalry between Thomas Edison and Nikola Tesla and how their work is still impacting the way we use energy today. Whether you're on Team Tesla or Team Edison, both inventors were key players in creating things like batteries, power plants and wireless technologies -- all innovations we still use today. And as we move toward a clean energy future, energy efficient lighting, like LED bulbs, and more efficient electric motors not only help us save money on electricity costs but help combat climate change. For this, Tesla and Edison both deserve our recognition.

  3. Edison vs. Tesla

    ScienceCinema (OSTI)

    Hogan, Kathleen; Wallace, Hal; Ivestor, Rob

    2014-01-07T23:59:59.000Z

    As Edison vs. Tesla week heats up at the Energy Department, we are exploring the rivalry between Thomas Edison and Nikola Tesla and how their work is still impacting the way we use energy today. Whether you're on Team Tesla or Team Edison, both inventors were key players in creating things like batteries, power plants and wireless technologies -- all innovations we still use today. And as we move toward a clean energy future, energy efficient lighting, like LED bulbs, and more efficient electric motors not only help us save money on electricity costs but help combat climate change. For this, Tesla and Edison both deserve our recognition.

  4. TESLA-Report 1993-33 TESLA-Report 1993-33

    E-Print Network [OSTI]

    #12;TESLA-Report 1993-33 #12;TESLA-Report 1993-33 #12;TESLA-Report 1993-33 #12;TESLA-Report 1993-33 #12;TESLA-Report 1993-33 #12;TESLA-Report 1993-33 #12;TESLA-Report 1993-33 #12;TESLA-Report 1993-33 #12;TESLA-Report 1993-33 #12;TESLA-Report 1993-33 #12;TESLA-Report 1993-33 #12;TESLA-Report 1993

  5. TESLA-Report 2002-07 TESLA-Report 2002-07

    E-Print Network [OSTI]

    #12;#12;#12;#12;TESLA-Report 2002-07 #12;TESLA-Report 2002-07 #12;TESLA-Report 2002-07 #12;TESLA-Report 2002-07 #12;TESLA-Report 2002-07 #12;TESLA-Report 2002-07 #12;TESLA-Report 2002-07 #12;TESLA-Report 2002-07 #12;TESLA-Report 2002-07 #12;TESLA-Report 2002-07 #12;TESLA-Report 2002-07 #12;TESLA

  6. TESLA-Report 1995-11 TESLA-Report 1995-11

    E-Print Network [OSTI]

    #12;TESLA-Report 1995-11 #12;TESLA-Report 1995-11 #12;TESLA-Report 1995-11 #12;TESLA-Report 1995-11 #12;TESLA-Report 1995-11 #12;TESLA-Report 1995-11 #12;TESLA-Report 1995-11 #12;TESLA-Report 1995-11 #12;TESLA-Report 1995-11 #12;TESLA-Report 1995-11 #12;TESLA-Report 1995-11 #12;TESLA-Report 1995

  7. Physics at TESLA

    E-Print Network [OSTI]

    Grahame A. Blair

    2001-04-25T23:59:59.000Z

    The physics at a 500-800 GeV electron positron linear collider, TESLA, is reviewed. The machine parameters that impact directly on the physics are discussed and a few key performance goals for a detector at TESLA are given. Emphasis is placed on precision measurements in the Higgs and top sectors and on extrapolation to high energy scales in the supersymmetric scenario.

  8. TESLA Report 2003-32 FPGA based TESLA cavity SIMCON

    E-Print Network [OSTI]

    TESLA Report 2003-32 FPGA based TESLA cavity SIMCON DOOCS server design, implementation of the laboratory solution of the FPGA based TESLA cavity simulator and controller (SIMCON) is presented. The major is a first description of the working DOOCS server for the FPGA based TESLA cavity SIMCON (which is a part

  9. Measuring and shimming the magnetic field of a 4 Tesla MRI magnet

    E-Print Network [OSTI]

    Kyriazis, Georgios

    1993-01-01T23:59:59.000Z

    The Biomedical Magnetic Resonance Laboratory (BMRL) of the University of Illinois at Urbana-Champaign (UIUC) has ordered from the Texas Accelerator Center (TAC) a superconducting, self-shielded, solenoidal magnet with a maximum field of 4 Tesla...

  10. TESLA FEL-Report 1996-10 TESLA FEL-Report 1996-10

    E-Print Network [OSTI]

    #12;TESLA FEL-Report 1996-10 #12;TESLA FEL-Report 1996-10 #12;TESLA FEL-Report 1996-10 #12;TESLA FEL-Report 1996-10 #12;TESLA FEL-Report 1996-10 #12;TESLA FEL-Report 1996-10 #12;TESLA FEL-Report 1996-10 #12;TESLA FEL-Report 1996-10 #12;TESLA FEL-Report 1996-10 #12;TESLA FEL-Report 1996-10 #12;TESLA FEL

  11. TESLA FEL-Report 1996-13 TESLA FEL-Report 1996-13

    E-Print Network [OSTI]

    TESLA FEL-Report 1996-13 #12;TESLA FEL-Report 1996-13 #12;TESLA FEL-Report 1996-13 #12;TESLA FEL-Report 1996-13 #12;TESLA FEL-Report 1996-13 #12;TESLA FEL-Report 1996-13 #12;TESLA FEL-Report 1996-13 #12;TESLA FEL-Report 1996-13 #12;TESLA FEL-Report 1996-13 #12;TESLA FEL-Report 1996-13 #12;TESLA FEL

  12. TESLA FEL-Report 2000-02 TESLA FEL-Report 2000-02

    E-Print Network [OSTI]

    TESLA FEL-Report 2000-02 #12;TESLA FEL-Report 2000-02 #12;TESLA FEL-Report 2000-02 #12;TESLA FEL-Report 2000-02 #12;TESLA FEL-Report 2000-02 #12;TESLA FEL-Report 2000-02 #12;TESLA FEL-Report 2000-02 #12;TESLA FEL-Report 2000-02 #12;TESLA FEL-Report 2000-02 #12;TESLA FEL-Report 2000-02 #12;TESLA FEL

  13. TESLA FEL-Report 1999-03 TESLA FEL-Report 1999-03

    E-Print Network [OSTI]

    TESLA FEL-Report 1999-03 #12;TESLA FEL-Report 1999-03 #12;TESLA FEL-Report 1999-03 #12;TESLA FEL-Report 1999-03 #12;TESLA FEL-Report 1999-03 #12;TESLA FEL-Report 1999-03 #12;TESLA FEL-Report 1999-03 #12;TESLA FEL-Report 1999-03 #12;TESLA FEL-Report 1999-03 #12;TESLA FEL-Report 1999-03 #12;TESLA FEL

  14. TESLA FEL-Report 1995-02 TESLA FEL-Report 1995-02

    E-Print Network [OSTI]

    TESLA FEL-Report 1995-02 #12;TESLA FEL-Report 1995-02 #12;TESLA FEL-Report 1995-02 #12;TESLA FEL-Report 1995-02 #12;TESLA FEL-Report 1995-02 #12;TESLA FEL-Report 1995-02 #12;TESLA FEL-Report 1995-02 #12;TESLA FEL-Report 1995-02 #12;TESLA FEL-Report 1995-02 #12;TESLA FEL-Report 1995-02 #12;TESLA FEL

  15. TESLA FEL Report 1996-07 TESLA FEL Report 1996-07

    E-Print Network [OSTI]

    TESLA FEL Report 1996-07 #12;TESLA FEL Report 1996-07 #12;TESLA FEL Report 1996-07 #12;TESLA FEL Report 1996-07 #12;TESLA FEL Report 1996-07 #12;TESLA FEL Report 1996-07 #12;TESLA FEL Report 1996-07 #12;TESLA FEL Report 1996-07 #12;TESLA FEL Report 1996-07 #12;TESLA FEL Report 1996-07 #12;TESLA FEL Report

  16. TESLA FEL Report 1996-06 TESLA FEL Report 1996-06

    E-Print Network [OSTI]

    TESLA FEL Report 1996-06 #12;TESLA FEL Report 1996-06 #12;TESLA FEL Report 1996-06 #12;TESLA FEL Report 1996-06 #12;TESLA FEL Report 1996-06 #12;TESLA FEL Report 1996-06 #12;TESLA FEL Report 1996-06 #12;TESLA FEL Report 1996-06 #12;TESLA FEL Report 1996-06 #12;TESLA FEL Report 1996-06 #12;TESLA FEL Report

  17. TESLA FEL-Report 1995-04 TESLA FEL-Report 1995-04

    E-Print Network [OSTI]

    #12;TESLA FEL-Report 1995-04 #12;TESLA FEL-Report 1995-04 #12;TESLA FEL-Report 1995-04 #12;TESLA FEL-Report 1995-04 #12;TESLA FEL-Report 1995-04 #12;TESLA FEL-Report 1995-04 #12;TESLA FEL-Report 1995-04 #12;TESLA FEL-Report 1995-04 #12;TESLA FEL-Report 1995-04 #12;TESLA FEL-Report 1995-04 #12;TESLA FEL

  18. TESLA FEL-Report 1996-16 TESLA FEL-Report 1996-16

    E-Print Network [OSTI]

    #12;TESLA FEL-Report 1996-16 #12;TESLA FEL-Report 1996-16 #12;TESLA FEL-Report 1996-16 #12;TESLA FEL-Report 1996-16 #12;TESLA FEL-Report 1996-16 #12;TESLA FEL-Report 1996-16 #12;TESLA FEL-Report 1996-16 #12;TESLA FEL-Report 1996-16 #12;TESLA FEL-Report 1996-16 #12;TESLA FEL-Report 1996-16 #12;TESLA FEL

  19. TESLA FEL-Report 1997-02 TESLA FEL-Report 1997-02

    E-Print Network [OSTI]

    TESLA FEL-Report 1997-02 #12;TESLA FEL-Report 1997-02 #12;TESLA FEL-Report 1997-02 #12;TESLA FEL-Report 1997-02 #12;TESLA FEL-Report 1997-02 #12;TESLA FEL-Report 1997-02 #12;TESLA FEL-Report 1997-02 #12;TESLA FEL-Report 1997-02 #12;TESLA FEL-Report 1997-02 #12;TESLA FEL-Report 1997-02 #12;TESLA FEL

  20. A Superconducting Bending Magnet System for a Compact Synchrotron Light Source

    E-Print Network [OSTI]

    Green, M.A.

    2011-01-01T23:59:59.000Z

    Garren, "Optimization of Superconducting Bending Magnets foral, "Development of a Superconducting Compact Storage Ringsdesigns M. A Green, "Superconducting Dipole Magnets for

  1. Study on the multi-pass, multi-bunch beam breakup for 9-cell TESLA cavities in ERL

    E-Print Network [OSTI]

    Chen, Si; Li, Yong-Ming; Feng, Li-Wen; Zhu, Feng; Quan, Sheng-Wen; Liu, Ke-Xin; Chen, Jia-Er

    2013-01-01T23:59:59.000Z

    Generally, Energy Recovery Linac (ERL) needs special designed high current superconducting RF cavities. In this paper, the threshold current of BBU for compact ERL facilities with 9-cell Tesla type cavities are investigated. The results show that it is feasible to adopt 9-cell Tesla cavity for compact ERL test facilities with just a few cavities and beam current around tens mA.

  2. TESLA-Report 1994-11 TESLA-Report 1994-11

    E-Print Network [OSTI]

    TESLA-Report 1994-11 #12;TESLA-Report 1994-11 #12;TESLA-Report 1994-11 #12;TESLA-Report 1994-11 #12;TESLA-Report 1994-11 #12;TESLA-Report 1994-11 #12;TESLA-Report 1994-11 #12;TESLA-Report 1994-11 #12;TESLA-Report 1994-11 #12;TESLA-Report 1994-11 #12;TESLA-Report 1994-11 #12;TESLA-Report 1994-11 #12

  3. TESLA-Report 1994-31 TESLA-Report 1994-31

    E-Print Network [OSTI]

    TESLA-Report 1994-31 #12;TESLA-Report 1994-31 #12;TESLA-Report 1994-31 #12;TESLA-Report 1994-31 #12;TESLA-Report 1994-31 #12;TESLA-Report 1994-31 #12;TESLA-Report 1994-31 #12;TESLA-Report 1994-31 #12;TESLA-Report 1994-31 #12;TESLA-Report 1994-31 #12;TESLA-Report 1994-31 #12;TESLA-Report 1994-31 #12

  4. TESLA-Report 1999-18 TESLA-Report 1999-18

    E-Print Network [OSTI]

    TESLA-Report 1999-18 #12;TESLA-Report 1999-18 #12;TESLA-Report 1999-18 #12;TESLA-Report 1999-18 #12;TESLA-Report 1999-18 #12;TESLA-Report 1999-18 #12;TESLA-Report 1999-18 #12;TESLA-Report 1999-18 #12;TESLA-Report 1999-18 #12;TESLA-Report 1999-18 #12;TESLA-Report 1999-18 #12;TESLA-Report 1999-18 #12

  5. TESLA-Report 1996-12 TESLA-Report 1996-12

    E-Print Network [OSTI]

    TESLA-Report 1996-12 #12;TESLA-Report 1996-12 #12;TESLA-Report 1996-12 #12;TESLA-Report 1996-12 #12;TESLA-Report 1996-12 #12;TESLA-Report 1996-12 #12;TESLA-Report 1996-12 #12;TESLA-Report 1996-12 #12;TESLA-Report 1996-12 #12;TESLA-Report 1996-12 #12;TESLA-Report 1996-12 #12;TESLA-Report 1996-12 #12

  6. TESLA-Report 1994-24 TESLA-Report 1994-24

    E-Print Network [OSTI]

    TESLA-Report 1994-24 #12;TESLA-Report 1994-24 #12;TESLA-Report 1994-24 #12;TESLA-Report 1994-24 #12;TESLA-Report 1994-24 #12;TESLA-Report 1994-24 #12;TESLA-Report 1994-24 #12;TESLA-Report 1994-24 #12;TESLA-Report 1994-24 #12;TESLA-Report 1994-24 #12;TESLA-Report 1994-24 #12;TESLA-Report 1994-24 #12

  7. TESLA-Report 1993-39 TESLA-Report 1993-39

    E-Print Network [OSTI]

    TESLA-Report 1993-39 #12;TESLA-Report 1993-39 #12;TESLA-Report 1993-39 #12;TESLA-Report 1993-39 #12;TESLA-Report 1993-39 #12;TESLA-Report 1993-39 #12;TESLA-Report 1993-39 #12;TESLA-Report 1993-39 #12;TESLA-Report 1993-39 #12;TESLA-Report 1993-39 #12;TESLA-Report 1993-39 #12;TESLA-Report 1993-39 #12

  8. TESLA-Report 1994-17 TESLA-Report 1994-17

    E-Print Network [OSTI]

    TESLA-Report 1994-17 #12;TESLA-Report 1994-17 #12;TESLA-Report 1994-17 #12;TESLA-Report 1994-17 #12;TESLA-Report 1994-17 #12;TESLA-Report 1994-17 #12;TESLA-Report 1994-17 #12;TESLA-Report 1994-17 #12;TESLA-Report 1994-17 #12;TESLA-Report 1994-17 #12;TESLA-Report 1994-17 #12;TESLA-Report 1994-17 #12

  9. TESLA FEL-Report 1999-04 TESLA FEL-Report 1999-07

    E-Print Network [OSTI]

    TESLA FEL-Report 1999-04 TESLA FEL-Report 1999-07 #12;TESLA FEL-Report 1999-04 TESLA FEL-Report 1999-07 #12;TESLA FEL-Report 1999-04 TESLA FEL-Report 1999-07 #12;TESLA FEL-Report 1999-04 TESLA FEL-Report 1999-07 #12;TESLA FEL-Report 1999-04 TESLA FEL-Report 1999-07 #12;TESLA FEL-Report 1999-04 TESLA FEL

  10. Report on the TESLA Engineering Study/Review

    SciTech Connect (OSTI)

    Cornuelle, John C.

    2002-08-30T23:59:59.000Z

    In March, 2001, the TESLA Collaboration published its Technical Design Report (TDR, see references and links in Appendix), the first sentence of which stated ''...TESLA (TeV-Energy Superconducting Linear Collider) (will be) a superconducting electron-positron collider of initially 500 GeV total energy, extendable to 800 GeV, and an integrated X-ray laser laboratory.'' The TDR included cost and manpower estimates for a 500 GeV e{sup +}e{sup -} collider (250 on 250 GeV) based on superconducting RF cavity technology. This was submitted as a proposal to the German government. The government asked the German Science Council to evaluate this proposal. The recommendation from this body is anticipated to be available by November 2002. The government has indicated that it will react on this recommendation by mid-2003. In June 2001, Steve Holmes, Fermilab's Associate Director for Accelerators, commissioned Helen Edwards and Peter Garbincius to organize a study of the TESLA Technical Design Report and the associated cost and manpower estimates. Since the elements and methodology used in producing the TESLA cost estimate were somewhat different from those used in preparing similar estimates for projects within the U.S., it is important to understand the similarities, differences, and equivalences between the TESLA estimate and U.S. cost estimates. In particular, the project cost estimate includes only purchased equipment, materials, and services, but not manpower from DESY or other TESLA collaborating institutions, which is listed separately. It does not include the R&D on the TESLA Test Facility (TTF) nor the costs of preparing the TDR nor the costs of performing the conceptual studies so far. The manpower for the pre-operations commissioning program (up to beam) is included in the estimate, but not the electrical power or liquid Nitrogen (for initial cooldown of the cryogenics plant). There is no inclusion of any contingency or management reserve. If the U.S. were to become involved with the TESLA project, either as a collaborator for an LC in Germany, or as host country for TESLA in the U.S., it is important to begin to understand the scope and technical details of the project, what R&D still needs to be done, and how the U.S. can contribute. The charge for this study is included in the Appendix to this report.

  11. Photon collider at TESLA

    E-Print Network [OSTI]

    Valery Telnov

    2001-03-06T23:59:59.000Z

    High energy photon colliders (gamma-gamma, gamma-electron) based on backward Compton scattering of laser light is a very natural addition to e+e- linear colliders. In this report we consider this option for the TESLA project. Recent study has shown that the horizontal emittance in the TESLA damping ring can be further decreased by a factor of four. In this case the gamma-gamma luminosity luminosity in the high energy part of spectrum can reach (1/3)L_{e+e-}. Typical cross sections of interesting processes in gamma-gamma collisions are higher than those in e+e- collisions by about one order of magnitude, so the number of events in gamma-gamma collisions will be more than that in e+e- collisions. Photon colliders can, certainly, give additional information and they are the best for the study of many phenomena. The main question is now the technical feasibility. The key new element in photon colliders is a very powerful laser system. An external optical cavity is a promising approach for the TESLA project. A free electron laser is another option. However, a more straightforward solution is ``an optical storage ring (optical trap)'' with diode pumped solid state laser injector which is today technically feasible. This paper briefly reviews the status of a photon collider based at TESLA, its possible parameters and existing problems.

  12. TESLA Linear-Collider Projekt Abbildung 134: Das hydrogeologische Profil entlang der TESLA-Trasse. Der TESLA-

    E-Print Network [OSTI]

    TESLA Linear-Collider Projekt Abbildung 134: Das hydrogeologische Profil entlang der TESLA-Trasse. Der TESLA- Tunnel liegt in wasserdurchlÀssigen und -undurchlÀssigen Schichten. Die wasserdurch gesÀttigt. 230 #12;TESLA Linear-Collider Projekt Voruntersuchungen zum TESLA Linear-Collider Projekt Ein

  13. SASE FEL at the TESLA Facility, Phase 2 The TESLA Test Facility FEL team

    E-Print Network [OSTI]

    SASE FEL at the TESLA Facility, Phase 2 The TESLA Test Facility FEL team June 2002, TESLA-FEL 2002-01 #12;SASE FEL at the TESLA Facility, Phase 2 Abstract The last description of the TESLA Test Facility FEL has been written in 1995 (TESLA- FEL report 95-03). Since then, many changes have developed

  14. arc dipole magnets: Topics by E-print Network

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

    R&D on a fast cycled superconducting dipole magnet (FCM) of interest for the upgrade plan of the LHC accelerator complex. The FCM dipole prototype being built has a number of...

  15. Theory and Performance of Tesla Turbines

    E-Print Network [OSTI]

    Romanin, Vincent D.

    2012-01-01T23:59:59.000Z

    through a Tesla turbine microchannel . . . . . . . . . . .1.2 History of the Tesla Turbine 1.3 BackgroundCFD) Solution of Flow Through a Tesla Turbine 4.1 Summary of

  16. Tesla Motors | Department of Energy

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

    465 million loan arrangement with Tesla Motors, Inc. to produce specially designed, all-electric plug-in vehicles; and to develop a manufacturing facility to produce battery...

  17. TESLA-Report 1999-05 TESLA-Report 1999-05

    E-Print Network [OSTI]

    TESLA-Report 1999-05 1 of 38 #12;TESLA-Report 1999-05 2 of 38 #12;TESLA-Report 1999-05 3 of 38 #12;TESLA-Report 1999-05 4 of 38 #12;TESLA-Report 1999-05 5 of 38 #12;TESLA-Report 1999-05 6 of 38 #12;TESLA-Report 1999-05 7 of 38 #12;TESLA-Report 1999-05 8 of 38 #12;TESLA-Report 1999-05 9 of 38 #12;TESLA-Report 1999

  18. Superconducting Magnet Division

    E-Print Network [OSTI]

    Gupta, Ramesh

    Superconducting Magnet Division Permanent Magnet Designs with Large Variations in Field Strength the residual field of the magnetized bricks by concentrating flux lines at the iron pole. Low Field Design Medium Field Design Superconducting Magnet Division Dipole and Quadrupole Magnets for RHIC e

  19. Capacitive Stress Transducers in Model Dipole Magnets

    E-Print Network [OSTI]

    Benson, Christopher P.

    2010-07-14T23:59:59.000Z

    Capacitive stress transducers are used to measure mechanical stresses in the windings of superconducting dipole magnets. These transducers consist of a bonded laminate composed of alternating foils of stainless steel and a high-strength polymer...

  20. TESLA-LNF TECHNICAL NOTE Divisione Acceleratori

    E-Print Network [OSTI]

    TESLA-LNF TECHNICAL NOTE _____________ Divisione Acceleratori Frascati, November 20, 2003 Note: TESLA Report 2003-26 TESLA DAMPING RING: INJECTION/EXTRACTION SCHEMES WITH RF DEFLECTORS D. Alesini, S/extraction schemes in the Damping Ring of TESLA using RF deflectors. We illustrate different possible solutions using

  1. Tesla TechFair Call for Proposals

    E-Print Network [OSTI]

    are celebrating Nikola Tesla, in conjunction with Tesla in New York, an opera by filmmaker Jim Jarmusch & composer | 4:00-6:00 PM | Spanos Auditorium/Great Hall, Thayer | Free Discover how Nikola Tesla's inventionsTesla TechFair Call for Proposals Thayer School of Engineering and the Hopkins Center

  2. Superconductive imaging surface magnetometer

    DOE Patents [OSTI]

    Overton, Jr., William C. (Los Alamos, NM); van Hulsteyn, David B. (Santa Fe, NM); Flynn, Edward R. (Los Alamos, NM)

    1991-01-01T23:59:59.000Z

    An improved pick-up coil system for use with Superconducting Quantum Interference Device gradiometers and magnetometers involving the use of superconducting plates near conventional pick-up coil arrangements to provide imaging of nearby dipole sources and to deflect environmental magnetic noise away from the pick-up coils. This allows the practice of gradiometry and magnetometry in magnetically unshielded environments. One embodiment uses a hemispherically shaped superconducting plate with interior pick-up coils, allowing brain wave measurements to be made on human patients. another embodiment using flat superconducting plates could be used in non-destructive evaluation of materials.

  3. TESLA 2004-14 Test Measurements of a new TESLA Cavity

    E-Print Network [OSTI]

    TESLA 2004-14 Test Measurements of a new TESLA Cavity Beam Position Monitor at the ELBE Linac V Abstract A new type of a cavity BPM proposed for beam position determination along the TESLA linac to TESLA would fulfil the demands for precise bunch-to-bunch position determination. Possible improvements

  4. 26 July 2000 TESLA Report 2000-13 Compensation of Solenoid Effects at the TESLA

    E-Print Network [OSTI]

    26 July 2000 TESLA Report 2000-13 Compensation of Solenoid Effects at the TESLA Interaction Point at the TESLA interaction point is 5 nm. The long solenoid encompassing the detector introduces coupling effects along the beam line. This is a concern for a linear collider such as TESLA, where the vertical beam size

  5. LCDETxxxxxxx Improved TESLA Optics and Beam Induced

    E-Print Network [OSTI]

    LC­DET­xxxx­xxx Improved TESLA Optics and Beam Induced Backgrounds Update Karsten BË?uĂ?er, DESY and Olivier Napoly, CEA/Saclay LCWS 2002, Jeju, Korea Abstract A new tesla optics with l*=5m is under development. An update is given on the simulation of the beam induced backgrounds in the TESLA detector. 1

  6. TESLA'S VISION OF THE WIRELESS GLOBAL COMMUNICATIONS

    E-Print Network [OSTI]

    Trajkovic, Ljiljana

    to align with the electric field. The Inventions, Researches and Writings of Nikola Tesla #12;March 12TESLA'S VISION OF THE WIRELESS GLOBAL COMMUNICATIONS Ljiljana Trajkovi Communication Networks;March 12, 2004 Kwantlen College Ljiljana Trajkovic, Simon Fraser University 2 Road map Tesla in 1890's

  7. TESLA'S VISION OF THE WIRELESS GLOBAL COMMUNICATIONS

    E-Print Network [OSTI]

    Trajkovic, Ljiljana

    of Nikola Tesla #12;January 17, 2005 UBC Ljiljana Trajkovic, Simon Fraser University 9 Wireless patentsTESLA'S VISION OF THE WIRELESS GLOBAL COMMUNICATIONS Ljiljana Trajkovi Communication Networks;January 17, 2005 UBC Ljiljana Trajkovic, Simon Fraser University 2 Road map Tesla in 1890's First wireless

  8. HIGH POWER COUPLER FOR THE TESLA SUPERSTRUCTURE , J. T. Susta, G. Cheng, AMAC International Inc., Newport News, VA 23606, U.S.A.

    E-Print Network [OSTI]

    Boyer, Edmond

    accelerators are built with superconducting cavities operating at cryogenic temperatures, and the probability TESLA cylindrical ceramic windows, uses two planar disc windows separated by a vacuum space failure allowing the inrush of atmospheric air into the superconducting cavities could potentially degrade

  9. RHQT Nb3Al 15-Tesla magnet design study

    SciTech Connect (OSTI)

    Yamada, R.; Ambrosio, G.; Barzi, E.; Kashikin, V.; Kikuchi, A.; Novitski, I.; Takeuchi, T.; Wake, M.; Zlobin, A.; /Fermilab /NIMC, Tsukuba /KEK, Tsukuba

    2005-09-01T23:59:59.000Z

    Feasibility study of 15-Tesla dipole magnets wound with a new copper stabilized RHQT Nb{sub 3}Al Rutherford cable is presented. A new practical long copper stabilized RHQT Nb{sub 3}Al strand is presented, which is being developed and manufactured at the National Institute of Material Science (NIMS) in Japan. It has achieved a non-copper J{sub c} of 1000A/mm{sup 2} at 15 Tesla at 4.2K, with a copper over non-copper ratio of 1.04, and a filament size less than 50 microns. For this design study a short Rutherford cable with 28 Nb{sub 3}Al strands of 1 mm diameter will be fabricated late this year. The cosine theta magnet cross section is designed using ROXIE, and the stress and strain in the coil is estimated and studied with the characteristics of the Nb{sub 3}Al strand. The advantages and disadvantages of the Nb{sub 3}Al cable are compared with the prevailing Nb{sub 3}Sn cable from the point of view of stress-strain, J{sub c}, and possible degradation of stabilizer due to cabling. The Nb{sub 3}Al coil of the magnet, which will be made by wind and react method, has to be heat treated at 800 degree C for 10 hours. As preparation for the 15 Tesla magnet, a series of tests on strand and Rutherford cables are considered.

  10. Cold- and Beam Test of the First Prototypes of the Superstructure for the TESLA Collider

    SciTech Connect (OSTI)

    Baboi, Nicoleta

    2003-08-08T23:59:59.000Z

    After three years of preparation, two superstructures, each made of two superconducting 7-cell weakly coupled subunits, have been installed in the TESLA Test Facility linac (TTF) for the cold- and beam-test. The energy stability, the HOMs damping, the frequency and the field adjustment methods were tested. The measured results confirmed expectation on the superstructure performance and proved that alternative layout for the 800 GeV upgrade of the TESLA collider, as it was proposed in TDR, is feasible. We report on the test and give here an overview of its results which are commented in more detail elsewhere in these Proceedings.

  11. The TESLA Time Projection Chamber

    E-Print Network [OSTI]

    Nabil Ghodbane

    2002-12-12T23:59:59.000Z

    A large Time Projection Chamber is proposed as part of the tracking system for a detector at the TESLA electron positron linear collider. Different ongoing R&D studies are reviewed, stressing progress made on a new type readout technique based on Micro-Pattern Gas Detectors.

  12. Superconducting Magnet Division

    E-Print Network [OSTI]

    Ohta, Shigemi

    Superconducting Magnet Division MAGNETIC DESIGN OF E-LENS SOLENOID AND CORRECTOR SYSTEM FOR RHIC* R.6 A gun collectors gun Combined Horizontal and Vertical Corrector Design Both types of dipole correctors. Gupta, M. Anerella, W. Fischer, G. Ganetis, X. Gu, A. Ghosh, A. Jain, P. Kovach, A. Marone, S. Plate, A

  13. TESLA-FEL Report 2005-06 DIGITAL LOW LEVEL RF CONTROL SYSTEM FOR THE DESY TTF

    E-Print Network [OSTI]

    TESLA-FEL Report 2005-06 DIGITAL LOW LEVEL RF CONTROL SYSTEM FOR THE DESY TTF VUV-FEL LINAC Valeri Electron Laser (VUV-FEL) Linac each klystron supplies RF power to up to 32 cavities. The superconducting. The VUV-FEL Linac RF control system employs a completely digital feedback system to provide flexibility

  14. Design considerations of a power supply system for fast cycling superconducting accelerator magnets of 2 Tesla b-field generated by a conductor of 100 kA current

    SciTech Connect (OSTI)

    Hays, Steve; Piekarz, Henryk; Pfeffer, Howie; Claypool, Brad; /Fermilab

    2007-06-01T23:59:59.000Z

    Recently proposed fast cycling accelerators for proton drivers (SF-SPS, CERN and SF-MR, SF-BOOSTER, FNAL) neutrino sources require development of new magnet technology. In support of this magnet development a power supply system will need to be developed that can support the high current and high rate of power swing required by the fast cycling (1 sec rise and fall in the SF-MR, 5Hz in Booster). This paper will outline a design concept for a +/- 2000 V and 100,000 A fast ramping power supply system. This power supply design is in support of a 6.44 km magnet system at 0.020 H and 330 m 5 Hz, 0.00534 H superconducting loads. The design description will include the layout and plan for extending the present FNAL Main Injector style ramping power supply to the higher currents needed for this operation. This will also include the design for a harmonic filter and power factor corrector that will be needed to control the large power swings caused by the fast cycle time. A conceptual design for the current regulation system and control will also be outlined. The power circuit design will include the bridge, filter and transformer plan based on existing designs.

  15. LCPHSM200060TESLA 29th December 2000

    E-Print Network [OSTI]

    LC­PHSM­2000­60­TESLA 29th December 2000 Measurement of the Differential Luminosity using Bhabha events in the Forward­Tracking region at TESLA K. Mšonig DESY­Zeuthen Abstract For most analyses at an e at TESLA is studied. #12; 1 Introduction One of the few unpleasant features of an e + e \\Gamma ­linear

  16. TESLA Technical Design Report Executive Summary

    E-Print Network [OSTI]

    TESLA Technical Design Report PART I Executive Summary March 2001 Editors: F.Richard, J.R.Schneider, D.Trines, A.Wagner #12;#12;Dedicated to the memory of BjÞrn H. Wiik (1937-1999) #12;#12;TESLA ­ A Summary This report describes the scientific aims and potential as well as the technical de- sign of TESLA

  17. 1 of 5 Copyright 2007 Tesla Motors Updated: December 19, 2007 The Tesla Roadster Battery System

    E-Print Network [OSTI]

    Laughlin, Robert B.

    (otherwise known as the ESS, or Energy Storage System) with a particular focus on the multiple safety systems1 of 5 Copyright © 2007 Tesla Motors Updated: December 19, 2007 The Tesla Roadster Battery System Tesla Motors August 16, 2006 By Gene Berdichevsky, Kurt Kelty, JB Straubel and Erik Toomre Summary

  18. SSC collider dipole magnet end mechanical design

    SciTech Connect (OSTI)

    Delchamps, S.W.; Bossert, R.C.; Carson, J.; Ewald, K.; Fulton, H.; Kerby, J.; Koska, W.; Strait, J.; Wake, S.M. (Fermi National Accelerator Lab., Batavia, IL (USA)); Leung, K.K. (Superconducting Super Collider Lab., Dallas, TX (USA))

    1991-05-01T23:59:59.000Z

    This paper describes the mechanical design of the ends of Superconducting Super Collider dipole magnets to be constructed and tested at Fermilab. Coil end clamps, end yoke configuration, and end plate design are discussed. Loading of the end plate by axial Lorentz forces is discussed. Relevant data from 40 mm and 50 mm aperture model dipole magnets built and tested at Fermilab are presented. In particular, the apparent influence of end clamp design on the quench behavior of model SSC dipoles is described. 8 refs., 3 figs.

  19. A modified post damping ring bunch compressor beamline for the TESLA linear collider

    SciTech Connect (OSTI)

    Philippe R.-G. Piot; Winfried Decking

    2004-03-23T23:59:59.000Z

    We propose a modified bunch compressor beamline, downstream of the damping ring, for the TESLA linear collider. This modified beamline uses a third harmonic radio-frequency section based on the 3.9 GHz superconducting cavity under development at Fermilab. In our design the beam deceleration is about {approx}50 MeV instead of {approx}450 MeV in the original design proposed.

  20. Thomas Edison vs. Nikola Tesla | Department of Energy

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

    Thomas Edison vs. Nikola Tesla Thomas Edison vs. Nikola Tesla Addthis Duration 46:00 Topic Alternative Fuel Vehicles Renewables Smart Grid Transmission Innovation...

  1. VIDEO: Who Was the Better Inventor, Tesla or Edison?

    Broader source: Energy.gov [DOE]

    “Who was the better inventor, Edison or Tesla, and why?” In our new video, we explore the famous rivalry between Thomas Edison and Nikola Tesla.

  2. Conventional wire scanners for TESLA K. Wittenburg

    E-Print Network [OSTI]

    in the undulator section. The heat load of the wires is calculated in the following for the TESLA parameters to the high heat load. At some locations in TESLA both beam diameters are larger than a few microns. The heat load defines the wire scanner parameters, mainly the scanning speed, and other limitations

  3. SUPERCONDUCTING DEVICES

    E-Print Network [OSTI]

    Clarke, John

    2014-01-01T23:59:59.000Z

    on all aspects of superconducting devices. IEEE Trans.on all aspects vf superconducting devices. The IBM JournalJ. Matisoo, The Superconducting Computer," Scientific

  4. Tesla Motors | Open Energy Information

    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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit with formSoutheasternInformation Tengchong CountyTerniEnergiaTersusTesla

  5. The Levitated Dipole Experiment: Experiment and Theory

    E-Print Network [OSTI]

    along- the-field-line losses disappear (all losses become cross-field) and near- stationary density losses and LDX exhibits a dramatic peaking of density (and pressure). Fluctuations of density - Technical Capability Routine operation of superconducting dipole. Up to 3 hr float time ECRF heating: 17 k

  6. Multi-Level TESLA: Broadcast Authentication for Distributed Sensor Networks

    E-Print Network [OSTI]

    Ning, Peng

    Multi-Level ”TESLA: Broadcast Authentication for Distributed Sensor Networks DONGGANG LIU and PENG named multi-level ”TESLA based on ”TESLA, a broadcast authentication protocol whose scalability is limited by its unicast-based initial parameter distribution. Multi-level ”TESLA satisfies several nice

  7. Hydrodynamic Tesla Wheel Flume for Model and Prototype Testing

    E-Print Network [OSTI]

    Wood, Stephen L.

    The Tesla turbine, U.S. Patent 1,061,206 -- May 6, 1913 was invented by Nikola Tesla as a means to extractHydrodynamic Tesla Wheel Flume for Model and Prototype Testing Spencer Jenkins, Chris Scott, Jacob Engineering department at Florida Institute of Technology (Florida Tech) has developed a Hydrodynamic Tesla

  8. Fig. 1. Schematic of LDX device showing three superconducting

    E-Print Network [OSTI]

    1 Fig. 1. Schematic of LDX device showing three superconducting magnets and the plasma@psfc.mit.edu Abstract: We report the first production of high beta plasma confined by a laboratory superconducting-field superconducting dipole magnet, termed the "floating coil" was supported by three thin support rods. In this mode

  9. A superconducting dipole magnet for laser spectroscopy 

    E-Print Network [OSTI]

    Wagenhauser, Kenneth Edward

    1990-01-01T23:59:59.000Z

    consists of two halves, each with 36 layers of wire, each layer containing 14 coils, for a total of 100S turns. Each layer is independently coiled, and either soldeted or cold-welded to the next layer. The resistance of these joints is expected... to be on the order of 10 9 and 10 7 ohms, respectively 9 The coils are mounted in a laminated iron cladding which, in addition to providing structural stability, dramatically reduces the field outside of the core by promoting flux return. 10 A welded stainless...

  10. A superconducting dipole magnet for laser spectroscopy

    E-Print Network [OSTI]

    Wagenhauser, Kenneth Edward

    1990-01-01T23:59:59.000Z

    while heated, and later reached 5 x 10-7 torr with the cryostat cooled and liquid helium in the helium vessel. Initial static testing of the vacuum vessel showed a leak of 0. 2 microns per hour, which suggests the use of a turbopump to maintain... specifications. . . . . . . . . . . . . Mass of system components. . Calibration of the liquid helium level sensor. . . . . . . . . . . . . . . . . . . . . Enthalpies of cryostat components. . Estimates of heat input. Heat input test results. Measured...

  11. SUPERCONDUCTING DEVICES

    E-Print Network [OSTI]

    Clarke, John

    2014-01-01T23:59:59.000Z

    communications. References Superconductor Applications: ~on all aspects of superconducting devices. IEEE Trans.on all aspects vf superconducting devices. The IBM Journal

  12. THE FUTURE OF THE WIRELESS ART by Nikola Tesla

    E-Print Network [OSTI]

    Cetiner, Bedri A.

    THE FUTURE OF THE WIRELESS ART by Nikola Tesla WIRELESS TELEGRAPHY & TELEPHONY By Walter W. Massie & Charles R. Underhill, 1908, pp. 67-71. Mr. Nikola Tesla, in a recent interview by the authors

  13. 15 T And Beyond - Dipoles and Quadrupoles

    SciTech Connect (OSTI)

    Sabbi, GianLuca

    2008-05-19T23:59:59.000Z

    Starting with the invention of the cyclotron by Lawrence, accelerator-based experiments have been the primary source of new discoveries in particle physics. In order to progress toward higher energy and luminosity, higher field magnets are required. R&D programs are underway to take advantage of new developments in superconducting materials, achieve better efficiency and simplify magnet fabrication while preserving accelerator-class field quality. A review of recent progress on high field dipole and quadrupole magnets is presented.

  14. Superconducting magnet

    DOE Patents [OSTI]

    Satti, John A. (Naperville, IL)

    1980-01-01T23:59:59.000Z

    A superconducting magnet designed to produce magnetic flux densities of the order of 4 to 5 Webers per square meter is constructed by first forming a cable of a plurality of matrixed superconductor wires with each wire of the plurality insulated from each other one. The cable is shaped into a rectangular cross-section and is wound with tape in an open spiral to create cooling channels. Coils are wound in a calculated pattern in saddle shapes to produce desired fields, such as dipoles, quadrupoles, and the like. Wedges are inserted between adjacent cables as needed to maintain substantially radial placement of the long dimensions of cross sections of the cables. After winding, individual strands in each of the cables are brought out to terminals and are interconnected to place all of the strands in series and to maximize the propagation of a quench by alternating conduction from an inner layer to an outer layer and from top half to bottom half as often as possible. Individual layers are separated from others by spiraled aluminum spacers to facilitate cooling. The wound coil is wrapped with an epoxy tape that is cured by heat and then machined to an interference fit with an outer aluminum pipe which is then affixed securely to the assembled coil by heating it to make a shrink fit. In an alternate embodiment, one wire of the cable is made of copper or the like to be heated externally to propagate a quench.

  15. LCM2003045 Improved TESLA Optics and Beam Induced

    E-Print Network [OSTI]

    LC­M­2003­045 Improved TESLA Optics and Beam Induced Backgrounds Update Karsten BË?uĂ?er, DESY and Olivier Napoly, CEA/Saclay LCWS 2002, Jeju, Korea Abstract A new tesla optics with l*=5m is under development. An update is given on the simulation of the beam induced backgrounds in the TESLA detector. 1

  16. Luminosity Stability Issues for the TESLA Beam Delivery System (BDS)

    E-Print Network [OSTI]

    Luminosity Stability Issues for the TESLA Beam Delivery System (BDS) Nicholas Walker1 (DESY, Germany) Andrzej Wolski2 (Daresbury Laboratory, UK) TESLA 2000-22 October 17, 2000 1 Introduction Given of ground motion and vibration in linear colliders both for TESLA and NLC/JLC (see for example [1

  17. Beam Dynamics Study for TESLA with the Integrated FEL

    E-Print Network [OSTI]

    Beam Dynamics Study for TESLA with the Integrated FEL V.M. Tsakanov Yerevan Physics Institute : : : : : : : : : : : : : : : : : : : : : : : 7 2.3 Conclusion 1 : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 10 3 The TESLA high based trajectory correction : : : : : : : : : : : : 22 5 Summary 25 1 #12;. 1 Introduction In the TESLA

  18. TESLA Technical Design Report Editors: R.Klanner

    E-Print Network [OSTI]

    TESLA Technical Design Report PART VI Appendices March 2001 Editors: R.Klanner Chapter 1: V.Rith #12;#12;Introduction VI-i Introduction These appendices to the TESLA Technical Design Report (TDR) describe four addi- tional particle-physics projects, which can be carried out at the TESLA e+ e- -collider

  19. TESLA Report 2005-08 Hamburg 28.02.2005

    E-Print Network [OSTI]

    TESLA Report 2005-08 Hamburg 28.02.2005 First Generation of Optical Fiber Phase Reference Distribution System for TESLA Krzysztof Czubaa , Frank Eintsb , Matthias Felberb , Janusz Dobrowolskia , Stefan describes the design of a phase stable Fiber Optic (FO) link for the TESLA technology based projects

  20. Determination of beam energy at TESLA using radiative return events

    E-Print Network [OSTI]

    Determination of beam energy at TESLA using radiative return events ARND HINZE DESY Zeuthen at TESLA. It was suggested to use this method to cross check and calibrate the magnet spectrometer used for measurement of the beam energy at TESLA. A preliminary assessment of the statistical and systematic errors

  1. TESLA Report 2006-04 DESY Thesis 2006-000

    E-Print Network [OSTI]

    TESLA Report 2006-04 DESY Thesis 2006-000 WARSAW UNIVERSITY OF TECHNOLOGY Faculty of Electronics and Informational Technologies Institute of Electronic Systems ELHEP Laboratory DESY TESLA LLRF Team Jerzy Stefan Zieliski Synchronic, optical transmission data link integrated with FPGA circuits (for TESLA LLRF control

  2. Multicore Platforms for Scientific Computing: Cell BE and NVIDIA Tesla

    E-Print Network [OSTI]

    Acacio, Manuel

    Multicore Platforms for Scientific Computing: Cell BE and NVIDIA Tesla J. FernÂŽandez, M.E. Acacio Tesla computing solutions. The former is a re- cent heterogeneous chip-multiprocessor (CMP) architecture, multicore, Cell BE, NVIDIA Tesla, CUDA 1 Introduction Nowadays, multicore architectures are omnipresent

  3. TESLA 2002-10 CBP Tech Note-268

    E-Print Network [OSTI]

    LCC-0108 TESLA 2002-10 CBP Tech Note-268 Comparison of Emittance Tuning Simulations in the NLC and TESLA Damping Rings A. Wolski LBNL W. Decking DESY November 11th , 2002 Abstract Vertical emittance is a critical issue for future linear collider damping rings. Both NLC and TESLA specify vertical emittance

  4. TESLA POLARIMETERS V.GHARIBYAN, N. MEYNERS, K. P. SCH

    E-Print Network [OSTI]

    TESLA POLARIMETERS V.GHARIBYAN, N. MEYNERS, K. P. SCH  ULER DESY, Deutsches Elektronen Synchrotron + e linear collider machine TESLA. A segment of the beam delivery system has been identi#12;ed, which the pulse and bunch structure of TESLA. This will permit very fast and ac- curate measurements

  5. Analyse de l'architecture GPU Tesla Sylvain Collange

    E-Print Network [OSTI]

    Boyer, Edmond

    Analyse de l'architecture GPU Tesla Sylvain Collange DALI, ELIAUS, UniversitÂŽe de Perpignan sylvain comprise. Nous prÂŽesentons ici une description du fonctionnement de l'architecture Tesla de NVIDIA et de;2 Tesla Nous nous pencherons dans cet article sur l'architecture des GPU NVIDIA dÂŽebutÂŽee avec le G80 (Ge

  6. TESLA: A Formally Defined Event Specification Language Gianpaolo Cugola

    E-Print Network [OSTI]

    Cugola, Gianpaolo

    TESLA: A Formally Defined Event Specification Language Gianpaolo Cugola Dip. di Elettronica e to clearly state how the system should behave. Moving from these premises, we present TESLA, a complex event specification language. Each TESLA rule considers incoming data items as notifi- cations of events and defines

  7. George Gollin, Investigation of TESLA Damping Ring Kickers using the A0 Photoinjector Beam 1 Investigation of TESLA Damping

    E-Print Network [OSTI]

    Gollin, George

    George Gollin, Investigation of TESLA Damping Ring Kickers using the A0 Photoinjector Beam 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . .. .. . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . .. . . .. .. . . . .. . . . .. . . . . . . .. .. . . . . . . IPhysicsP Illinois Investigation of TESLA Damping Ring Kickers using the A0 Photoinjector Beam George, Investigation of TESLA Damping Ring Kickers using the A0 Photoinjector Beam 2

  8. First Thoughts on Commissioning of the TESLA Compiled by P. Castro for the TESLA commissioning study group.

    E-Print Network [OSTI]

    First Thoughts on Commissioning of the TESLA Collider Compiled by P. Castro for the TESLA commissioning study group. September 6, 2002 Abstract The TESLA collider[1] is a large scale project, the stage of test of its various parts and the commissioning of the whole facility requires a considerable

  9. Final Report: Levitated Dipole Experiment

    SciTech Connect (OSTI)

    Kesner, Jay [Massachusetts Institute of Technology; Mauel, Michael [Columbia University

    2013-03-10T23:59:59.000Z

    Since the very first experiments with the LDX, research progress was rapid and significant. Initial experiments were conducted with the high-field superconducting coil suspended by three thin rods. These experiments produced long-pulse, quasi-steady-state microwave discharges, lasting more than 10 s, having peak beta values of 20% [Garnier et al., Physics of Plasmas, 13 (2006) 056111]. High- beta, near steady-state discharges have been maintained in LDX for more than 20 seconds, and this capability made LDX the longest pulse fusion confinement experiment operating in the U.S. fusion program. A significant measure of progress in the LDX research program was the routine investigation of plasma confinement with a magnetically-levitated dipole and the resulting observations of confinement improvement. In both supported and levitated configurations, detailed measurements were made of discharge evolution, plasma dynamics and instability, and the roles of gas fueling, microwave power deposition profiles, and plasma boundary shape. High-temperature plasma was created by multi frequency electron cyclotron resonance heating at 2.45 GHz, 6.4 GHz, 10.5 GHz and 28 GHz allowing control of heating profiles. Depending upon neutral fueling rates, the LDX discharges contain a fraction of energetic electrons, with mean energies above 50 keV. Depending on whether or not the superconducting dipole was levitated or supported, the peak thermal electron temperature was estimated to exceed 500 eV and peak densities to approach 1e18 m?3. We have found that levitation causes a strong inwards density pinch [Boxer et al., Nature Physics, 6 (2010) 207] and we have observed the central plasma density increase dramatically indicating a significant improvement in the confinement of a thermal plasma species.

  10. Dipole-Dipole coupled double Rydberg molecules

    E-Print Network [OSTI]

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

    2012-05-21T23:59:59.000Z

    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.

  11. Superconductive wire

    DOE Patents [OSTI]

    Korzekwa, David A. (Los Alamos, NM); Bingert, John F. (Jemez Springs, NM); Peterson, Dean E. (Los Alamos, NM); Sheinberg, Haskell (Santa Fe, NM)

    1995-01-01T23:59:59.000Z

    A superconductive article is made by inserting a rigid mandrel into an internal cavity of a first metallic tube, said tube having an interior surface and an exterior surface, said interior surface defining the interior cavity, forming a layer of a superconductive material or superconductive precursor upon the exterior surface of said first metallic tube, machining the layer of superconductive material or superconductive precursor to a predetermined diameter to form an intermediate article configured for insertion into a second metallic tube having an interior diameter corresponding to the predetermined diameter, inserting the machined intermediate article into a second metallic tube having an internal diameter corresponding to the predetermined diameter of the intermediate article to form a composite intermediate article, reducing or ironing the composite intermediate article to a predetermined cross-sectional diameter, and sintering the reduced or ironed composite intermediate article at temperatures and for time sufficient for the superconductive material or superconductive precursor to exhibit superconductivity.

  12. Electron Scattering with Polarized Targets at TESLA

    E-Print Network [OSTI]

    The TESLA-N Study Group; :; M. Anselmino; E. C. Aschenauer; S. Belostotski; W. Bialowons; J. Bluemlein; V. Braun; R. Brinkmann; M. Dueren; F. Ellinghaus; K. Goeke; St. Goertz; A. Gute; J. Harmsen; D. v. Harrach; R. Jakob; E. M. Kabuss; R. Kaiser; V. Korotkov; P. Kroll; E. Leader; B. Lehmann-Dronke; L. Mankiewicz; A. Meier; W. Meyer; N. Meyners; D. Mueller; P. J. Mulders; W. -D. Nowak; L. Niedermeier; K. Oganessyan; P. V. Pobilitsa; M. V. Polyakov; G. Reicherz; K. Rith; D. Ryckbosch; A. Schaefer; K. Sinram; G. v. d. Steenhoven; E. Steffens; J. Steijger; C. Weiss

    2000-11-24T23:59:59.000Z

    Measurements of polarized electron-nucleon scattering can be realized at the TESLA linear collider facility with projected luminosities that are about two orders of magnitude higher than those expected of other experiments at comparable energies. Longitudinally polarized electrons, accelerated as a small fraction of the total current in the e+ arm of TESLA, can be directed onto a solid state target that may be either longitudinally or transversely polarized. A large variety of polarized parton distribution and fragmentation functions can be determined with unprecedented accuracy, many of them for the first time. A main goal of the experiment is the precise measurement of the x- and Q^2-dependence of the experimentally totally unknown quark transversity distributions that will complete the information on the nucleon's quark spin structure as relevant for high energy processes. Comparing their Q^2-evolution to that of the corresponding helicity distributions constitutes an important precision test of the predictive power of QCD in the spin sector. Measuring transversity distributions and tensor charges allows access to the hitherto unmeasured chirally odd operators in QCD which are of great importance to understand the role of chiral symmetry. The possibilities of using unpolarized targets and of experiments with a real photon beam turn TESLA-N into a versatile next-generation facility at the intersection of particle and nuclear physics.

  13. Superconducting wire and cable for RHIC

    SciTech Connect (OSTI)

    Garber, M.; Ghosh, A.K.; Greene, A.; McChesney, D.; Morgillo, A.; Shah, R. [Brookhaven National Lab., Upton, NY (United States); DelRe, S.; Epstein, G.; Hong, S.; Lichtenwalner, J. [Oxford Superconducting Technology, Carteret, NJ (United States)] [and others

    1994-06-01T23:59:59.000Z

    The superconducting dipole and quadrupole magnets in the RHIC accelerator ring are to be fabricated from 30-strand superconducting cable. The RHIC wire has a diameter of 0.65 mm, copper-to-superconductor ratio of 2.25, filament diameter of 6 {mu}m and high critical current density. Primary emphasis during manufacturing has been on uniformity of materials, processes and performance. Near final results are presented on a production program which has extended over two years. Measured parameters are described which are important for design of superconducting accelerator magnets.

  14. High gain proportional rf control stability at TESLA cavities Elmar Vogel

    E-Print Network [OSTI]

    High gain proportional rf control stability at TESLA cavities Elmar Vogel Deutsches Elektronen) based on TESLA technology. Additional control loops improve the field regulation by treating repetitive loops is desirable for the strong suppression of nonpredictive and nonrepetitive disturbances. TESLA

  15. High-resolution 7-Tesla fMRI of Human Hippocampal Subfields during Associative Learning.

    E-Print Network [OSTI]

    2014-01-01T23:59:59.000Z

    fMRI in the Human Brain at 7 Tesla: Combining Reduced Field-High-resolution 7-Tesla fMRI of Human Hippocampal Subfieldsrobustly using FMRI at 7 tesla. Journal of Neuroimaging, 23(

  16. Contributions to the LCWS99, Sitges, April 1999 TESLA Report 1999-20 Contributions to the LCWS99, Sitges, April 1999 TESLA Report 1999-20

    E-Print Network [OSTI]

    Contributions to the LCWS99, Sitges, April 1999 TESLA Report 1999-20 #12;Contributions to the LCWS99, Sitges, April 1999 TESLA Report 1999-20 #12;Contributions to the LCWS99, Sitges, April 1999 TESLA Report 1999-20 #12;Contributions to the LCWS99, Sitges, April 1999 TESLA Report 1999-20 #12;Contributions

  17. 21 Tesla mass spectrometry magnet arrives at EMSL | EMSL

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

    and biological materials are one step closer to using EMSL's new 21 Tesla Fourier Transform Ion Cyclotron Resonance Mass Spectrometer. The magnet, a critical piece of...

  18. Polarized Electron-Nucleon Scattering at The TESLA-N Study-Group

    E-Print Network [OSTI]

    DESY TESLA-N Polarized Electron-Nucleon Scattering at TESLA The TESLA-N Study-Group http://www.ifh.de/hermes/future | THE BASIC IDEA | A Polarized Fixed-Target Experiment at TESLA Basic Idea: Use one arm of the TESLA collider 0 0 1 1 01 (north arm) Magnet TESLA Main Linac TESLA­N 250 GeV Electrons Separation Building

  19. Pediatric cardiovascular interventional devices: effect on CMR images at 1.5 and 3 Tesla

    E-Print Network [OSTI]

    Khan, Sarah N; Rapacchi, Stanislas; Levi, Daniel S; Finn, J

    2013-01-01T23:59:59.000Z

    on CMR images at 1.5 and 3 Tesla. Journal of Cardiovascularon CMR images at 1.5 and 3 Tesla Sarah N Khan 1* , Stanislas

  20. Dipole-Dipole Resistivity At Blue Mountain Geothermal Area (Ross...

    Open Energy Info (EERE)

    GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Dipole-Dipole Resistivity At Blue Mountain Geothermal Area (Ross, Et Al., 1999) Exploration Activity Details Location...

  1. Dipole-Dipole Resistivity At Blue Mountain Geothermal Area (Fairbank...

    Open Energy Info (EERE)

    Fairbank Engineering Ltd, 2003) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Dipole-Dipole Resistivity At Blue Mountain Geothermal Area...

  2. Superconducting Cable

    DOE Patents [OSTI]

    Hughey, Raburn L. (Franklin, GA); Sinha, Uday K. (Carrollton, GA); Reece, David S. (Carrollton, GA); Muller, Albert C. (Eidson, TN)

    2005-07-22T23:59:59.000Z

    In order to provide a flexible oxide superconducting cable which is reduced in AC loss, tape-shaped superconducting wires covered with a stabilizing metal are wound on a flexible former. The superconducting wires are preferably laid on the former at a bending strain of not more than 0.2%. In laying on the former, a number of tape-shaped superconducting wires are laid on a core member in a side-by-side manner, to form a first layer. A prescribed number of tape-shaped superconducting wires are laid on top of the first layer in a side-by-side manner, to form a second layer. The former may be made of a metal, plastic, reinforced plastic, polymer, or a composite and provides flexibility to the superconducting wires and the cable formed therewith.

  3. Superconducting Cable

    DOE Patents [OSTI]

    Hughey, Raburn L. (Franklin, GA); Sinha, Uday K. (Carrollton, GA); Reece, David S. (Carrollton, GA); Muller, Albert C. (Eidson, TN)

    2005-03-08T23:59:59.000Z

    In order to provide a flexible oxide superconducting cable which is reduced in AC loss, tape-shaped superconducting wires covered with a stabilizing metal are wound on a flexible former. The superconducting wires are preferably laid on the former at a bending strain of not more than 0.2%. In laying on the former, a number of tape-shaped superconducting wires are laid on a core member in a side-by-side manner, to form a first layer. A prescribed number of tape-shaped superconducting wires are laid on top of the first layer in a side-by-side manner, to form a second layer. The former may be made of a metal, plastic, reinforced plastic, polymer, or a composite and provides flexibility to the superconducting wires and the cable formed therewith.

  4. TESLA Report 2003-08 Cavity control system

    E-Print Network [OSTI]

    with signal and power considerations is presented. Two alternative simulation models of cavity control systemTESLA Report 2003-08 Cavity control system essential modeling for TESLA linear accelerator Tomasz' interaction point and high beam luminosity. The complex control system for the relativistic beam has been

  5. Single-Bunch Electron Cloud Effects in the GLC/NLC, US-Cold and TESLA Low Emittance Transport Lines

    SciTech Connect (OSTI)

    Bates, D.

    2005-04-12T23:59:59.000Z

    This paper examines the severity of the electron cloud effects in the Low Emittance Transport (LET) of linear colliders including the Bunch-Compressor System (BCS) and Beam Delivery System (BDS). We examine the electron cloud effects in the normal-conducting GLC/NLC or X-Band, and the super-conducting US-Cold and TESLA linear collider designs through the use of specially developed computer simulation codes. An estimate of the critical cloud density is given for the BDS and BCS of the X-Band collider.

  6. Edison vs. Tesla | Department of Energy

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power AdministrationField Campaign:INEA :Work4/11ComputationalEd Westcott: LegacyEdison vs. Tesla

  7. Tesla Motors Inc | Open Energy Information

    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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro Industries PvtStratosolar JumpTennessee/Wind Resources <70079°,Terryville,Tesla Motors Inc

  8. Superconducting borides

    SciTech Connect (OSTI)

    Fisk, Z.

    1990-01-01T23:59:59.000Z

    A number of superconductors are found among binary and ternary boride compounds. The highest {Tc}'s are often fund near a limiting composition for the compound's stability. Ternary borides have been a fertile area for exploring the interaction between superconductivity and magnetism, and appear to be the area in which further aspects of boride superconductivity will be pursued. 25 refs., 3 tabs.

  9. Wakefield and RF Kicks Due to Coupler Asymmetry in TESLA-Type Accelerating Cavities

    SciTech Connect (OSTI)

    Bane, K.L.F.; Adolphsen, C.; Li, Z.; /SLAC; Dohlus, M.; Zagorodnov, I.; /DESY; Gonin, I.; Lunin, A.; Solyak, N.; Yakovlev, V.; /Fermilab; Gjonaj, E.; Weiland, T.; /Darmstadt, Tech. Hochsch.

    2008-07-07T23:59:59.000Z

    In a future linear collider, such as the International Linear Collider (ILC), trains of high current, low emittance bunches will be accelerated in a linac before colliding at the interaction point. Asymmetries in the accelerating cavities of the linac will generate fields that will kick the beam transversely and degrade the beam emittance and thus the collider performance. In the main linac of the ILC, which is filled with TESLA-type superconducting cavities, it is the fundamental (FM) and higher mode (HM) couplers that are asymmetric and thus the source of such kicks. The kicks are of two types: one, due to (the asymmetry in) the fundamental RF fields and the other, due to transverse wakefields that are generated by the beam even when it is on axis. In this report we calculate the strength of these kicks and estimate their effect on the ILC beam. The TESLA cavity comprises nine cells, one HM coupler in the upstream end, and one (identical, though rotated) HM coupler and one FM coupler in the downstream end (for their shapes and location see Figs. 1, 2) [1]. The cavity is 1.1 m long, the iris radius 35 mm, and the coupler beam pipe radius 39 mm. Note that the couplers reach closer to the axis than the irises, down to a distance of 30 mm.

  10. Superconducting structure

    DOE Patents [OSTI]

    Kwon, Chuhee (Los Alamos, NM); Jia, Quanxi (Los Alamos, NM); Foltyn, Stephen R. (Los Alamos, NM)

    2003-04-01T23:59:59.000Z

    A superconductive structure including a dielectric oxide substrate, a thin buffer layer of a superconducting material thereon; and, a layer of a rare earth-barium-copper oxide superconducting film thereon the thin layer of yttrium-barium-copper oxide, the rare earth selected from the group consisting of samarium, gadolinium, ytterbium, erbium, neodymium, dysprosium, holmium, lutetium, a combination of more than one element from the rare earth group and a combination of one or more elements from the rare earth group with yttrium, the buffer layer of superconducting material characterized as having chemical and structural compatibility with the dielectric oxide substrate and the rare earth-barium-copper oxide superconducting film is provided.

  11. Superconducting Structure

    DOE Patents [OSTI]

    Kwon, Chuhee (Los Alamos, NM); Jia, Quanxi (Los Alamos, NM); Foltyn, Stephen R. (Los Alamos, NM)

    2005-09-13T23:59:59.000Z

    A superconductive structure including a dielectric oxide substrate, a thin buffer layer of a superconducting material thereon; and, a layer of a rare earth-barium-copper oxide superconducting film thereon the thin layer of yttrium-barium-copper oxide, the rare earth selected from the group consisting of samarium, gadolinium, ytterbium, erbium, neodymium, dysprosium, holmium, lutetium, a combination of more than one element from the rare earth group and a combination of one or more elements from the rare earth group with yttrium, the buffer layer of superconducting material characterized as having chemical and structural compatibility with the dielectric oxide substrate and the rare earth-barium-copper oxide superconducting film is provided.

  12. DESY, February 2001, TESLA Report 2001-04 Concept of the High Power e

    E-Print Network [OSTI]

    DESY, February 2001, TESLA Report 2001-04 Concept of the High Power e± Beam Dumps for TESLA W. Bialowons, M. Maslov, M. Schmitz, V. Sytchev #12;1 Concept of the High Power e± Beam Dumps for TESLA W............................................................................................................... 19 #12;2 1 Introduction The TESLA accelerator is equipped with quite a number of extraction lines

  13. DAPNIA/SEA-00-15 TESLA Linear Collider : Status Report

    E-Print Network [OSTI]

    DAPNIA/SEA-00-15 TESLA Linear Collider : Status Report O. Napoly for the TESLA Collaboration CEA) October 24-28, 2000, FNAL, Batavia, IL, USA #12;#12;TESLA Linear Collider : Status Report O. Napoly for the TESLA Collaboration CEA/Saclay, DAPNIA/SEA 91191 Gif-sur-Yvette, FRANCE Abstract. We review the current

  14. TESLA Report 2003-29 Functional analysis of DSP blocks in FPGA chips

    E-Print Network [OSTI]

    TESLA Report 2003-29 Functional analysis of DSP blocks in FPGA chips for application in TESLA LLRF blocks. The new functionalities are well suited for the application in the TESLA LLRF cavity simulation in the FPGA chips of Altera and Xilinx. There were compared the results for a few different chips. The TESLA

  15. TESLA Report No. 2000-26 September 2000 Fiber Optic Radiation Sensing Systems

    E-Print Network [OSTI]

    TESLA Report No. 2000-26 September 2000 Fiber Optic Radiation Sensing Systems for TESLA by H, Germany F. Wulf Hahn-Meitner-Institut HMI, Germany #12;Fiber Optic Radiation Sensing Systems for TESLA of refractive index at high radiation doses 4 3. Fiber optic dosimeter types for different TESLA sections 4 3

  16. TESLA Report 2003-19 THE SHORT-RANGE TRANSVERSE WAKE

    E-Print Network [OSTI]

    TESLA Report 2003-19 THE SHORT-RANGE TRANSVERSE WAKE FUNCTION FOR TESLA ACCELERATING STRUCTURE T of a Free Electron Laser in TESLA project requires very short bunches. It results in a very long interaction calculate the short-range transverse wakefields of the TESLA linac accelerating structure. Wake fields

  17. TESLA Report 2005-05 Software Layer for SIMCON ver. 1.1.

    E-Print Network [OSTI]

    TESLA Report 2005-05 Software Layer for SIMCON ver. 1.1. FPGA-based TESLA Cavity Control System to control FPGA-based LLRF electronic equipment for TESLA. There is presented a universal solution (SIMCON) for TESLA experiment (Test Facility) in DESY. The examples of the build and tested software

  18. Superconducting phase qubits

    E-Print Network [OSTI]

    Martinis, John M.

    2009-01-01T23:59:59.000Z

    frequency noise in dc superconducting quantum interfer- enceeld enhancement of superconductivity in ultranarrow wires.Transformed dissipation in superconducting quantum circuits.

  19. SUPERCONDUCTING MAGNETIC ENERGY STORAGE

    E-Print Network [OSTI]

    Hassenzahl, W.

    2011-01-01T23:59:59.000Z

    and R. W . BOOIll, "Superconductive Energy Storage Inducand H. A. Peterson, "Superconductive E nergy S torage forMeeting, Janua ry N. Mohan, "Superconductive Energy S torage

  20. Superconducting phase qubits

    E-Print Network [OSTI]

    Martinis, John M.

    2009-01-01T23:59:59.000Z

    frequency noise in dc superconducting quantum interfer- enceTransformed dissipation in superconducting quantum circuits.two-level system noise in superconducting microreson- ators.

  1. SUPERCONDUCTING MAGNETIC ENERGY STORAGE

    E-Print Network [OSTI]

    Hassenzahl, W.

    2011-01-01T23:59:59.000Z

    Design of the BPA Superconducting 30-MJ Energy Storagefor a Utility Scale Superconducting Magnetic Energy Storagefor a Lnrge Scale Superconducting Magnetic Energy Storage

  2. Final Report: Levitated Dipole Experiment

    SciTech Connect (OSTI)

    Kesner, Jay; Mauel, Michael

    2013-03-10T23:59:59.000Z

    Since the very first experiments with the LDX, research progress was rapid and significant. Initial experiments were conducted with the high-field superconducting coil suspended by three thin rods. These experiments produced long-pulse, quasi-steady-state microwave discharges, lasting more than 10 s, having peak beta values of 20% [Garnier, Phys. Plasmas, v13, p. 056111, 2006]. High-beta, near steady-state discharges have been maintained in LDX for more than 20 seconds, and this capability makes LDX the longest pulse fusion confinement experiment now operating in the U.S. fusion program. In both supported and levitated configurations, detailed measurements are made of discharge evolution, plasma dynamics and instability, and the roles of gas fueling, microwave power deposition profiles, and plasma boundary shape. High-temperature plasma is created by multifrequency electron cyclotron resonance heating allowing control of heating profiles. Depending upon neutral fueling rates, the LDX discharges contain a fraction of energetic electrons, with mean energies above 50 keV. Depending on whether or not the superconducting dipole is levitated or supported, the peak thermal electron temperature is estimated to exceed 500 eV and peak densities reach 1.0E18 (1/m3). Several significant discoveries resulted from the routine investigation of plasma confinement with a magnetically-levitated dipole. For the first time, toroidal plasma with pressure approaching the pressure of the confining magnetic field was well-confined in steady-state without a toroidal magnetic field. Magnetic levitation proved to be reliable and is now routine. The dipole's cryostat allows up to three hours of "float time" between re-cooling with liquid helium and providing scientists unprecedented access to the physics of magnetizd plasma. Levitation eliminates field-aligned particle sources and sinks and results in a toroidal, magnetically-confined plasma where profiles are determined by cross-field transport. We find levitation causes the central plasma density to increase dramatically and to significantly improve the confinement of thermal plasma [Boxer, Nature-Physics, v8, p. 949, 2010]. Several diagnostic systems have been used to measure plasma fluctuations, and these appear to represent low-frequency convection that may lead to adiabatic heating and strongly peaked pressure profiles. These experiments are remarkable, and the motivate wide-ranging studies of plasma found in space and confined for fusion energy. In the following report, we describe: (i) observations of the centrally-peaked density profile that appears naturally as a consequence of a strong turbulent pinch, (ii) observations of overall density and pressure increases that suggest large improvements to the thermal electron confinement time result occur during levitation, and (iii) the remarkable properties of low-frequency plasma fluctuations that cause magnetized plasma to "self-organize" into well-confined, centrally-peaked profiles that are relative to fusion and to space.

  3. High-field magnets using high-critical-temperature superconducting thin films

    DOE Patents [OSTI]

    Mitlitsky, Fred (Livermore, CA); Hoard, Ronald W. (Livermore, CA)

    1994-01-01T23:59:59.000Z

    High-field magnets fabricated from high-critical-temperature superconducting ceramic (HTSC) thin films which can generate fields greater than 4 Tesla. The high-field magnets are made of stackable disk-shaped substrates coated with HTSC thin films, and involves maximizing the critical current density, superconducting film thickness, number of superconducting layers per substrate, substrate diameter, and number of substrates while minimizing substrate thickness. The HTSC thin films are deposited on one or both sides of the substrates in a spiral configuration with variable line widths to increase the field.

  4. High-field magnets using high-critical-temperature superconducting thin films

    DOE Patents [OSTI]

    Mitlitsky, F.; Hoard, R.W.

    1994-05-10T23:59:59.000Z

    High-field magnets fabricated from high-critical-temperature superconducting ceramic (HTSC) thin films which can generate fields greater than 4 Tesla are disclosed. The high-field magnets are made of stackable disk-shaped substrates coated with HTSC thin films, and involves maximizing the critical current density, superconducting film thickness, number of superconducting layers per substrate, substrate diameter, and number of substrates while minimizing substrate thickness. The HTSC thin films are deposited on one or both sides of the substrates in a spiral configuration with variable line widths to increase the field. 4 figures.

  5. Noncommutative Dipole Field Theories

    E-Print Network [OSTI]

    K. Dasgupta; M. M. Sheikh-Jabbari

    2002-02-05T23:59:59.000Z

    Assigning an intrinsic constant dipole moment to any field, we present a new kind of associative star product, the dipole star product, which was first introduced in [hep-th/0008030]. We develop the mathematics necessary to study the corresponding noncommutative dipole field theories. These theories are sensible non-local field theories with no IR/UV mixing. In addition we discuss that the Lorentz symmetry in these theories is ``softly'' broken and in some particular cases the CP (and even CPT) violation in these theories may become observable. We show that a non-trivial dipole extension of N=4, D=4 gauge theories can only be obtained if we break the SU(4) R (and hence super)-symmetry. Such noncommutative dipole extensions, which in the maximal supersymmetric cases are N=2 gauge theories with matter, can be embedded in string theory as the theories on D3-branes probing a smooth Taub-NUT space with three form fluxes turned on or alternatively by probing a space with R-symmetry twists. We show the equivalences between the two approaches and also discuss the M-theory realization.

  6. A New Method to Detect the High Impedance Dipole Modes of TESLA Cavities

    E-Print Network [OSTI]

    previously mentioned. CEA DAPNIA SEA-98-18 #12;#12;1 Introduction and Recalls out N BPM BPM Module ACC1 non-powered N S S x0 in inBPM BPM x(t) Module ACC1 non-powered out a b Figure 1: a: Experiment I; b: Experiment, it can be shown that the transverse beam displacement is ampli ed at the BPM location by an amount which

  7. TESLA*HERA as Lepton (Photon)-Hadron Collider

    E-Print Network [OSTI]

    O. Yavas; A. K. Ciftci; S. Sultansoy

    2000-04-11T23:59:59.000Z

    New facilities for particle and nuclear physics research, which will be available due to constructing the TESLA linear electron-positron collider tangentially to the HERA proton ring, are discussed.

  8. Tesla Demonstration for Happy Valley Elementary Tuesday, November 20th

    E-Print Network [OSTI]

    California at Santa Cruz, University of

    Tesla Demonstration for Happy Valley Elementary Tuesday, November 20th Schedule Load Time: 11: ___________________________________________________________ Contact: Chris McGriff, cmcgriff@santacruz.k12.ca.us Address: Happy Valley Elementary School, Branciforte

  9. Nanoantenna enhancement for telecom-wavelength superconducting single photon detectors

    E-Print Network [OSTI]

    Heath, Robert M; Drysdale, Timothy D; Miki, Shigehito; Giannini, Vincenzo; Maier, Stefan A; Hadfield, Robert H

    2015-01-01T23:59:59.000Z

    Superconducting nanowire single photon detectors are rapidly emerging as a key infrared photon-counting technology. Two front-side-coupled silver dipole nanoantennas, simulated to have resonances at 1480 nm and 1525 nm, were fabricated in a two-step process. An enhancement of 50% to 130% in the system detection efficiency was observed when illuminating the antennas. This offers a pathway to increasing absorption into superconducting nanowires, creating larger active areas, and achieving more efficient detection at longer wavelengths.

  10. A Wire Position Monitor System for the 1.3 FHZ Tesla-Style Cryomodule at the Fermilab New-Muon-Lab Accelerator

    SciTech Connect (OSTI)

    Eddy, N.; Fellenz, B.; Prieto, P.; Semenov, A.; Voy, D.C.; Wendt, M.; /Fermilab

    2011-08-17T23:59:59.000Z

    The first cryomodule for the beam test facility at the Fermilab New-Muon-Lab building is currently under RF commissioning. Among other diagnostics systems, the transverse position of the helium gas return pipe with the connected 1.3 GHz SRF accelerating cavities is measured along the {approx}15 m long module using a stretched-wire position monitoring system. An overview of the wire position monitor system technology is given, along with preliminary results taken at the initial module cooldown, and during further testing. As the measurement system offers a high resolution, we also discuss options for use as a vibration detector. An electron beam test facility, based on superconducting RF (SRF) TESLA-style cryomodules is currently under construction at the Fermilab New-Muon-Lab (NML) building. The first, so-called type III+, cryomodule (CM-1), equipped with eight 1.3 GHz nine-cell accelerating cavities was recently cooled down to 2 K, and is currently under RF conditioning. The transverse alignment of the cavity string within the cryomodule is crucial for minimizing transverse kick and beam break-up effects, generated by the high-order dipole modes of misaligned accelerating structures. An optimum alignment can only be guaranteed during the assembly of the cavity string, i.e. at room temperatures. The final position of the cavities after cooldown is uncontrollable, and therefore unknown. A wire position monitoring system (WPM) can help to understand the transverse motion of the cavities during cooldown, their final location and the long term position stability after cryo-temperatures are settled, as well as the position reproducibility for several cold-warm cycles. It also may serve as vibration sensor, as the wire acts as a high-Q resonant detector for mechanical vibrations in the low-audio frequency range. The WPM system consists out of a stretched-wire position detection system, provided with help of INFN-Milano and DESY Hamburg, and RF generation and read-out electronics, developed at Fermilab.

  11. Microwave probes Dipole Blockade and van der Waals Forces in a Cold Rydberg Gas

    E-Print Network [OSTI]

    R. Celistrino Teixeira; C. Hermann-Avigliano; Thanh Long Nguyen; T. Cantat-Moltrecht; Jean-Michel Raimond; S. Haroche; S. Gleyzes; M. Brune

    2015-02-14T23:59:59.000Z

    We show that microwave spectroscopy of a dense Rydberg gas trapped on a superconducting atom chip in the dipole blockade regime reveals directly the dipole-dipole many-body interaction energy spectrum. We use this method to investigate the expansion of the Rydberg cloud under the effect of repulsive van der Waals forces and the breakdown of the frozen gas approximation. This study opens a promising route for quantum simulation of many-body systems and quantum information transport in chains of strongly interacting Rydberg atoms.

  12. Microwave probes Dipole Blockade and van der Waals Forces in a Cold Rydberg Gas

    E-Print Network [OSTI]

    Teixeira, R Celistrino; Nguyen, Thanh Long; Cantat-Moltrecht, T; Raimond, Jean-Michel; Haroche, S; Gleyzes, S; Brune, M

    2015-01-01T23:59:59.000Z

    We show that microwave spectroscopy of a dense Rydberg gas trapped on a superconducting atom chip in the dipole blockade regime reveals directly the dipole-dipole many-body interaction energy spectrum. We use this method to investigate the expansion of the Rydberg cloud under the effect of repulsive van der Waals forces and the breakdown of the frozen gas approximation. This study opens a promising route for quantum simulation of many-body systems and quantum information transport in chains of strongly interacting Rydberg atoms.

  13. Electromagnetically superconducting phase of QCD vacuum induced by strong magnetic field

    SciTech Connect (OSTI)

    Chernodub, M. N. [CNRS, Laboratoire de Mathematiques et Physique Theorique, Universite Francois-Rabelais Tours, Federation Denis Poisson, Parc de Grandmont, 37200 Tours (France); Department of Physics and Astronomy, University of Gent, Krijgslaan 281, S9, B-9000 Gent (Belgium)

    2011-05-23T23:59:59.000Z

    In this talk we discuss our recent suggestion that the QCD vacuum in a sufficiently strong magnetic field (stronger than 10{sup 16} Tesla) may undergo a spontaneous transition to an electromagnetically superconducting state. The possible superconducting state is anisotropic (the vacuum exhibits superconductivity only along the axis of the uniform magnetic field) and inhomogeneous (in the transverse directions the vacuum structure shares similarity with the Abrikosov lattice of an ordinary type-II superconductor). The electromagnetic superconductivity of the QCD vacuum is suggested to occur due to emergence of specific quark-antiquark condensates which carry quantum numbers of electrically charged rho mesons. A Lorentz-covariant generalization of the London transport equations for the magnetic-field-induced superconductivity is given.

  14. Superconducting magnets for SCRF cryomodules at front end of linear accelerators

    SciTech Connect (OSTI)

    Kashikhin, V.S.; Andreev, N.; Orlov, Y.; Orris, D.F.; Tartaglia, M.A.; /Fermilab

    2010-05-01T23:59:59.000Z

    Linear accelerators based on a superconducting technology need various superconducting magnets mounted inside SCRF Cryomodules. Relatively weak iron-dominated magnets are installed at the front end of linear accelerators. The focusing quadrupoles have integrated gradients in the range of 1-4 T, and apertures in the range 35-90 mm. Superconducting dipole correctors and quadrupoles were designed at Fermilab for various projects. In this paper these magnet designs, and test results of a fabricated dipole corrector, are presented. Also briefly discussed are magnetic and mechanical designs, quench protection, cooling, fabrication, and assembly into cryomodule.

  15. Mapping local hippocampal changes in Alzheimer's disease and normal ageing with MRI at 3 Tesla

    E-Print Network [OSTI]

    Thompson, Paul

    Mapping local hippocampal changes in Alzheimer's disease and normal ageing with MRI at 3 Tesla and Alzheimer's disease based on high resolution MRI at 3 Tesla. T1-weighted images were acquired from 19

  16. SEX DIFFERENCES IN THE HUMAN CONNECTOME: 4-TESLA HIGH ANGULAR RESOLUTION DIFFUSION IMAGING (HARDI)

    E-Print Network [OSTI]

    Thompson, Paul

    SEX DIFFERENCES IN THE HUMAN CONNECTOME: 4-TESLA HIGH ANGULAR RESOLUTION DIFFUSION IMAGING (HARDI diffusion imaging at 4 Tesla, we scanned 234 young adult twins and siblings (mean age: 23.4 ± 2.0 SD years

  17. LEFT VERSUS RIGHT HEMISPHERE DIFFERENCES IN BRAIN CONNECTIVITY: 4-TESLA HARDI TRACTOGRAPHY IN 569 TWINS

    E-Print Network [OSTI]

    Thompson, Paul

    LEFT VERSUS RIGHT HEMISPHERE DIFFERENCES IN BRAIN CONNECTIVITY: 4-TESLA HARDI TRACTOGRAPHY IN 569) and 112 adolescents (age 12-16) with 4-Tesla 105-gradient high- angular resolution diffusion imaging. We

  18. Strongest non-destructive magnetic field: world record set at 100-tesla level

    E-Print Network [OSTI]

    - 1 - Strongest non-destructive magnetic field: world record set at 100-tesla level March 22, 2012), the scientists achieved a whopping 100.75 tesla--a magnetic field nearly 100 times more powerful than a junkyard and insulators. The 100-tesla level is roughly equivalent to 2 million times Earth's magnetic field. #12;- 2

  19. Forschung an Lepton Collidern Abbildung 49: Perspektivische Ansicht des TESLA-Detektors.

    E-Print Network [OSTI]

    Forschung an Lepton Collidern Abbildung 49: Perspektivische Ansicht des TESLA-Detektors. 86 #12An- strengung vieler Gruppen und Institute der ,,Tech- nical Design Report" fĂŒr TESLA veröffentlicht wer- den von TESLA, besonders in Bereichen, die im TDR nicht ausreichend behandelt werden konnten, und die

  20. Tesla: A Transparent, Extensible Session-Layer Framework for End-to-end Network Services

    E-Print Network [OSTI]

    Gummadi, Ramakrishna

    Tesla: A Transparent, Extensible Session-Layer Framework for End-to-end Network Services by . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Arthur C. Smith Chairman, Department Committee on Graduate Students #12;2 #12;Tesla: A Transparent of these services, we describe Tesla, a transparent and extensible framework that allows session-layer services

  1. TESLA: A Transparent, Extensible Session-Layer Architecture for End-to-end Network Services

    E-Print Network [OSTI]

    TESLA: A Transparent, Extensible Session-Layer Architecture for End-to-end Network Services Jon describes TESLA, a transparent and extensible framework allowing session- layer services to be developed using a high-level flow- based abstraction. TESLA services can be deployed transparently using dynamic

  2. The TESLA Broadcast Authentication Protocol Adrian Perrig Ran Canetti J. D. Tygar Dawn Song

    E-Print Network [OSTI]

    Xu, Wenyuan

    The TESLA Broadcast Authentication Protocol Adrian Perrig Ran Canetti J. D. Tygar Dawn Song presents the TESLA (Timed Efficient Stream Loss-tolerant Authentication) broadcast au- thentication numbers of receivers, and tolerates packet loss. TESLA is based on loose time synchro- nization between

  3. LCnote LCPHSM2005001 Determination of beam energy at TESLA using radiative

    E-Print Network [OSTI]

    LCPHSM2005001 Determination of beam energy at TESLA using radiative return events ARND HINZE DESY Zeuthen at TESLA. It was suggested to use this method to cross check and calibrate the magnet spectrometer used for measurement of the beam energy at TESLA. A preliminary assessment of the statistical and systematic errors

  4. The TESLA Broadcast Authentication Protocol Adrian Perrig Ran Canetti J. D. Tygar Dawn Song

    E-Print Network [OSTI]

    Tygar, Doug

    The TESLA Broadcast Authentication Protocol Adrian Perrig Ran Canetti J. D. Tygar Dawn Song presents the TESLA (Timed Efficient Stream Loss-tolerant Authentication) broadcast authentication protocol of receivers, and tolerates packet loss. TESLA is based on loose time synchronization between the sender

  5. Wakefield induced Losses in the Manual Valves of the TESLA Cryomodule

    E-Print Network [OSTI]

    1 Wakefield induced Losses in the Manual Valves of the TESLA Cryomodule M.Dohlus,H.-P.Wedekind,K.Zapfe DeutschesElektronenSynchrotron Notkestr.85,D-22603Hamburg,Germany Abstract The beam pipe of the TESLA valves with spring type rf-shield which are presently used in the linac of the TESLA Test Facility

  6. The TESLA Broadcast Authentication Protocol # Adrian Perrig Ran Canetti J. D. Tygar Dawn Song

    E-Print Network [OSTI]

    Perrig, Adrian

    The TESLA Broadcast Authentication Protocol # Adrian Perrig Ran Canetti J. D. Tygar Dawn Song presents the TESLA (Timed Efficient Stream Loss­tolerant Authentication) broadcast au­ thentication numbers of receivers, and tolerates packet loss. TESLA is based on loose time synchro­ nization between

  7. LAL/RT 04-03 THE TESLA HIGH POWER COUPLER PROGRAM AT ORSAY

    E-Print Network [OSTI]

    Boyer, Edmond

    LAL/RT 04-03 April 2004 1 THE TESLA HIGH POWER COUPLER PROGRAM AT ORSAY T. Garvey, H. Borie, L, Université de Paris-Sud, B.P. 34, 91898 Orsay, France Abstract Within the general TESLA collaboration-Orsay are centred on the development of RF input couplers for the cavities of the TESLA linear collider study

  8. Tesla coil discharges guided by femtosecond laser filaments in air Yohann Brelet1

    E-Print Network [OSTI]

    Boyer, Edmond

    1 Tesla coil discharges guided by femtosecond laser filaments in air Yohann Brelet1 , Aurélien, Palaiseau, France A Tesla coil generator was designed to produce high voltage pulses oscillating at 100 k experiments of laser guided discharges obtained in air by high voltage bursts delivered by a compact Tesla

  9. TESLA-Based Defense Against Pollution Attacks in P2P Systems with Network Coding

    E-Print Network [OSTI]

    Markopoulou, Athina

    TESLA-Based Defense Against Pollution Attacks in P2P Systems with Network Coding Anh Le, Athina and time asymmetry (as in TESLA [1]) to provide source authentication for the detection scheme and non; pollution; detection; identification; TESLA; homomorphic MAC. I. INTRODUCTION Peer-to-peer (P2P) systems

  10. TESLA Report 2005-04 Modular & reconfigurable common PCB-platform of

    E-Print Network [OSTI]

    TESLA Report 2005-04 Modular & reconfigurable common PCB-platform of FPGA based LLRF control system for TESLA Test Facility Krzysztof T. Pozniak, Ryszard S. Romaniuk Institute of Electronic Systems in a universal motherboard (MB) for the next generation of LLRF control system for TESLA. The motherboard bases

  11. Tesla: A Transparent, Extensible Session-Layer Framework for End-to-end Network Services

    E-Print Network [OSTI]

    Tesla: A Transparent, Extensible Session-Layer Framework for End-to-end Network Services by . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Arthur C. Smith Chairman, Department Committee on Graduate Students #12; 2 #12; Tesla: A Transparent of these services, we describe Tesla, a transparent and extensible framework that allows session-layer services

  12. Study of the TESLA preaccelerator for the polarised electron beam Aline Curtoni, Marcel Jablonka,

    E-Print Network [OSTI]

    Study of the TESLA preaccelerator for the polarised electron beam Aline Curtoni, Marcel Jablonka, CEA, DSM/DAPNIA, Saclay, France Abstract In the mainframe of the TESLA Technical Design Report a study assumed. Figure 1 : Schematic of the TESLA injector complex. This report deals with the bottom injector

  13. BRIEF COMMUNICATION A 7 Tesla fMRI Study of Amygdala Responses to Fearful Faces

    E-Print Network [OSTI]

    Hadjikhani, Nouchine

    BRIEF COMMUNICATION A 7 Tesla fMRI Study of Amygdala Responses to Fearful Faces Wietske van der field strength. In this study, the feasibility of fMRI in the amygdalae at 7 Tesla was investigated in a fearful face depends on stimulus duration. Keywords Amygdala Á fMRI Á 7 Tesla Á Fear Á Face perception

  14. Electrical axes of TESLA-type cavities (Theoretical background, development of measurement equipment, measurement results)

    E-Print Network [OSTI]

    - 1 - Electrical axes of TESLA-type cavities (Theoretical background, development of measurement equipment, measurement results) Anton Labanc, MHF-SL, DESY, January 2008 Abstract Cells in TESLA cavities. A short overview was already published at the TESLA Report 2007-01. This paper brings more details about

  15. NHMFL Breaks the 100 Tesla Barrier Gregory S. Boebinger, National High Magnetic Field Laboratory

    E-Print Network [OSTI]

    Weston, Ken

    NHMFL Breaks the 100 Tesla Barrier Gregory S. Boebinger, National High Magnetic Field Laboratory. 109no. 31 12404-12407 On March 22nd 2012, the NHMFL ­ Pulsed Field Facility broke the 100T tesla barrier, setting a world record of 100.75 tesla for a non-destructive magnet. By using advanced

  16. Proving Correctness of the Basic TESLA Multicast Stream Authentication Protocol with TAME

    E-Print Network [OSTI]

    Proving Correctness of the Basic TESLA Multicast Stream Authentication Protocol with TAME Presented, Washington, DC 20375 E-mail: archer@itd.nrl.navy.mil The TESLA multicast stream authentication protocol just been revealed. While an informal argument for the correctness of TESLA has been published

  17. TESLA: A Transparent, Extensible Session-Layer Architecture for End-to-end Network Services

    E-Print Network [OSTI]

    Gummadi, Ramakrishna

    TESLA: A Transparent, Extensible Session-Layer Architecture for End-to-end Network Services Jon describes TESLA, a transparent and extensible framework allowing session- layer services to be developed using a high-level €ow- based abstraction. TESLA services can be deployed transparently using dynamic

  18. Bunch Compressor for the TESLA Linear Collider W. Decking, G. Hoffstaetter, T. Limberg

    E-Print Network [OSTI]

    Hoffstaetter, Georg

    Bunch Compressor for the TESLA Linear Collider W. Decking, G. Hoffstaetter, T. Limberg DESY compression systems for the TESLA collider. The best alternative is a wiggler type compressor, where we list' R56 = z/: R56 needed = 2 zi - 2 zf f . (2) The basic parameters for the TESLA bunch compressor

  19. Refrigeration options for the Advanced Light Source Superbend Dipole Magnets

    SciTech Connect (OSTI)

    Green, M.A.; Hoyer, E.H.; Schlueter, R.D.; Taylor, C.E.; Zbasnik, J.; Wang, S.T.

    1999-07-09T23:59:59.000Z

    The 1.9 GeV Advance Light Source (ALS) at the Lawrence Berkeley National Laboratory (LBNL) produces photons with a critical energy of about 3.1 kev at each of its thirty-six 1.3 T gradient bending magnets. It is proposed that at three locations around the ring the conventional gradient bending magnets be replaced with superconducting bending magnets with a maximum field of 5.6 T. At the point where the photons are extracted, their critical energy will be about 12 keV. In the beam lines where the SuperBend superconducting magnets are installed, the X ray brightness at 20 keV will be increased over two orders of magnitude. This report describes three different refrigeration options for cooling the three SuperBend dipoles. The cooling options include: (1) liquid helium and liquid nitrogen cryogen cooling using stored liquids, (2) a central helium refrigerator (capacity 70 to 100 W) cooling all of the SuperBend magnets, (3) a Gifford McMahon (GM) cryocooler on each of the dipoles. This paper describes the technical and economic reasons for selecting a small GM cryocooler as the method for cooling the SuperBend dipoles on the LBNL Advanced Light Source.

  20. Time Synchronization in Hierarchical TESLA Wireless Sensor Networks

    SciTech Connect (OSTI)

    Jason L. Wright; Milos Manic

    2009-08-01T23:59:59.000Z

    Time synchronization and event time correlation are important in wireless sensor networks. In particular, time is used to create a sequence events or time line to answer questions of cause and effect. Time is also used as a basis for determining the freshness of received packets and the validity of cryptographic certificates. This paper presents secure method of time synchronization and event time correlation for TESLA-based hierarchical wireless sensor networks. The method demonstrates that events in a TESLA network can be accurately timestamped by adding only a few pieces of data to the existing protocol.

  1. Superconducting Magnet Division

    E-Print Network [OSTI]

    Superconducting Magnet Division DOE NP Program Review - July 06 1 Brookhaven Magnet Division - Nuclear Physics Program Support Activities Superconducting Magnet Program RHIC Operations Support Spin Summary Peter Wanderer, DOE review, July 25, 2006 Acting Head, Superconducting Magnet Division #12

  2. Superconducting Spintronics

    E-Print Network [OSTI]

    Linder, Jacob; Robinson, Jason W. A.

    2015-01-01T23:59:59.000Z

    such as the uranium based heavy- fermion compounds [35, 36] . This includes the creation of spin cur- rents without resistance [37–41] and spin-valve devices controlling the resistance of the junction via the superconducting critical temper- ature Tc [42]. There are... for each spin species [109]. Outlook and perspectives We end the review by offering our perspective on possible direc- tions that may be fruitful to explore in order to develop supercon- ducting spintronics. While progress has been most pronounced...

  3. Dipole-strength

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power AdministrationField Campaign: Potential ApplicationYu,EnergyDimitri KusnezovDipole-strength

  4. SUPERCONDUCTING MAGNETIC ENERGY STORAGE

    E-Print Network [OSTI]

    Hassenzahl, W.

    2011-01-01T23:59:59.000Z

    Superconducting 30-MJ Energy Storage Coil", Proc. 19 80 ASC,Superconducting Magnetic Energy Storage Plant", IEEE Trans.SlIperconducting Magnetic Energy Storage Unit", in Advances

  5. Superconducting Topological Insulators

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

    Superconducting Topological Insulators Superconducting Topological Insulators Print Wednesday, 26 January 2011 00:00 Three-dimensional topological insulators (TIs), discovered...

  6. (Final Draft) Superconducting

    E-Print Network [OSTI]

    ANDAND (Final Draft) Achieving Advanced Electrical Wires From Superconducting Coatings Prepared and Development Roadmap to Achieve Electrical Wire Advancements from Superconducting Coatings (Final Draft) Edited

  7. A Tree-Based TESLA Broadcast Authentication for Sensor Networks Donggang Liu Peng Ning Sencun Zhu Sushil Jajodia

    E-Print Network [OSTI]

    Zhu, Sencun

    A Tree-Based ”TESLA Broadcast Authentication for Sensor Networks Donggang Liu Peng Ning Sencun Zhu to multiple nodes in an authenticated way. ”TESLA and multi-level ”TESLA have been proposed to provide of senders. Though multi-level ”TESLA schemes can scale up to large sensor networks (in terms of receivers

  8. A POUR IAYER, TWO INCH BORE, SUPERCONDUCTING DIPOLE MAGNET

    E-Print Network [OSTI]

    Hassenzahl, W.V.

    2011-01-01T23:59:59.000Z

    C. Peters, W. Gilbert, C. Taylor and R. M user e LawrencePeters, W. Gilbert, C. Taylor, and R. Meuser November 19829A magnet. References I. C. Taylor, R. Meuser, S. Caspl, W.

  9. Passive correction of persistent current multipoles in superconducting accelerator dipoles

    SciTech Connect (OSTI)

    Fisk, H.E.; Hanft, R.A.; Kuchnir, M.; McInturff, A.D.

    1986-07-01T23:59:59.000Z

    Correction of the magnetization sextupole and decapole fields with strips of superconductor placed just inside the coil winding is discussed. Calculations have been carried out for such a scheme, and tests have been conducted on a 4 cm aperture magnet. The calculated sextupole correction at the injection excitation of 330 A, 5% of full field, was expected to be 77% effective, while the measured correction is 83%, thus suggesting the scheme may be useful for future accelerators such as SSC and LHC.

  10. TESLA Report 2001-34 DESY, November 2001

    E-Print Network [OSTI]

    such as hydrogen, nitrogen, oxygen or carbon. After this procedure the titanium is removed from the surfaceTESLA Report 2001-34 DESY, November 2001 Bulk and Grain Boundary Diffusion of Titanium in High of the quenched cavity. This is done chemically in acid mixtures. To remove the whole quantity of titanium

  11. Pulse Cable for TESLA Modulators Hans-Jrg Eckoldt

    E-Print Network [OSTI]

    to the radiation inside the TESLA tunnel and the accessibility of the units the power part of the modulators shall be installed into the service halls. However the transformer tank and the klystrons have to be inside ..........................................................................................................................8 #12;1 Introduction Modulators are used to generate the pulsed power for the klystrons

  12. Developmentof the 15 T Nb3Sn dipole HD2

    SciTech Connect (OSTI)

    Caspi, S.; Cheng, D.W.; Dietderich, D.R.; Hafalia, A.R.; Hannaford, C.R.; Higley, H.; Lietzke, A.F.; Lizarazo, J.; McInturff, A.D.; Sabbi, G.; Ferracin, P.

    2008-06-01T23:59:59.000Z

    The Superconducting Magnet Program at Lawrence Berkeley National Laboratory (LBNL) is continuing the development of HD2, a 1 m long Nb{sub 3}Sn dipole generating a dipole field of 15 T in a 36 mm clear bore. With tilted (flared) ends to avoid obstructing the beam path, HD2 represents a step towards the development of cost effective accelerator quality magnets. The design has been optimized to minimize geometric harmonics and to address iron saturation and conductor magnetization effects. The support structure is based on an external aluminum shell, pre-tensioned with pressurized bladders and interference keys. Aluminum axial rods and stainless steel end plates provide longitudinal support to the coil ends during magnet excitation. This paper reports on field quality optimization and magnet parameters. The design and fabrication of the coil and structure components, and results from coil winding, reaction, and potting are also presented.

  13. Radiation effects in a muon collider ring and dipole magnet protection

    E-Print Network [OSTI]

    Mokhov, N V; Novitski, I; Zlobin, A V

    2011-01-01T23:59:59.000Z

    The requirements and operating conditions for a Muon Collider Storage Ring (MCSR) pose significant challenges to superconducting magnets. The dipole magnets should provide a high magnetic field to reduce the ring circumference and thus maximize the number of muon collisions during their lifetime. One third of the beam energy is continuously deposited along the lattice by the decay electrons at the rate of 0.5 kW/m for a 1.5-TeV c.o.m. and a luminosity of 1034 cm-2s-1. Unlike dipoles in proton machines, the MCSR dipoles should allow this dynamic heat load to escape the magnet helium volume in the horizontal plane, predominantly towards the ring center. This paper presents the analysis and comparison of radiation effects in MCSR based on two dipole magnets designs. Tungsten masks in the interconnect regions are used in both cases to mitigate the unprecedented dynamic heat deposition and radiation in the magnet coils.

  14. Superconductivity for Electric Systems

    E-Print Network [OSTI]

    1 Superconductivity for Electric Systems Superconductivity Program Quarterly Progress Report For the Period October 1, 2006, to December 31, 2006 #12;2 Superconductivity Program Quarterly Progress Report Superconductivity Program Oak Ridge National Laboratory For U.S. Department of Energy Office of Electricity Delivery

  15. Superconductivity for Electric Systems

    E-Print Network [OSTI]

    Superconductivity for Electric Systems Superconductivity Program Quarterly Progress Report For the Period January 1, 2007 to March 31, 2007 #12;2 Superconductivity Program Quarterly Progress Report Superconductivity Program Oak Ridge National Laboratory For: Department of Energy Office of Electricity Delivery

  16. Superconductivity for Electric Systems

    E-Print Network [OSTI]

    Superconductivity for Electric Systems Superconductivity Program Quarterly Progress Report For the Period April 1, 2007, to June 30, 2007 #12;2 Superconductivity Program Quarterly Progress Report Superconductivity Program Oak Ridge National Laboratory For: Department of Energy Office of Electricity Delivery

  17. Harmonic Analysis Errors in Calculating Dipole,

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

    to reduce the harmonic field calculation errors. A conformal transfor- mation of a multipole magnet into a dipole reduces these errors. Dipole Magnet Calculations A triangular...

  18. QUENCHES IN LARGE SUPERCONDUCTING MAGNETS

    E-Print Network [OSTI]

    Eberhard, P.H.

    2010-01-01T23:59:59.000Z

    QUENCHES IN LARGE SUPERCONDUCTING MAGNETS. P. H. Eberhard,Study of an Unprotected Superconducting Coil Going Normal,"Method for Testing Superconducting Magnets," LBL Physics

  19. Novel Approach to Linear Accelerator Superconducting Magnet System

    SciTech Connect (OSTI)

    Kashikhin, Vladimir; /Fermilab

    2011-11-28T23:59:59.000Z

    Superconducting Linear Accelerators include a superconducting magnet system for particle beam transportation that provides the beam focusing and steering. This system consists of a large number of quadrupole magnets and dipole correctors mounted inside or between cryomodules with SCRF cavities. Each magnet has current leads and powered from its own power supply. The paper proposes a novel approach to magnet powering based on using superconducting persistent current switches. A group of magnets is powered from the same power supply through the common, for the group of cryomodules, electrical bus and pair of current leads. Superconducting switches direct the current to the chosen magnet and close the circuit providing the magnet operation in a persistent current mode. Two persistent current switches were fabricated and tested. In the paper also presented the results of magnetic field simulations, decay time constants analysis, and a way of improving quadrupole magnetic center stability. Such approach substantially reduces the magnet system cost and increases the reliability.

  20. Alternative Approach to the Provision of the High-field Dipole for FCC-hh

    E-Print Network [OSTI]

    Taylor, Thomas

    2015-01-01T23:59:59.000Z

    This paper describes a possible approach to reducing the complexity and cost of the high field dipole magnets. In addition the cooling of the winding could be improved in the proposed design, with a consequent reduction in the shielding requirements. The correction of multipoles is also addressed: this feature may impact on the dynamic range of operation of the magnets. Noting that it would be possible to add a small gradient component to the dipole, it is suggested that a (partially) combined function lattice should be considered. The proposals lead to a brief re-appraisal of how best to apply superconductivity to magnets for large accelerators.

  1. The Superconducting TESLA Cavities Dedicated to the memory of Bjrn H. Wiik

    E-Print Network [OSTI]

    Boyer, Edmond

    . Wolff4 and K. Zapfe4 1 CEA Saclay, Gif-sur-Yvette, France 2 CERN, Geneve, Switzerland 3 Cornellšur Experimentalphysik, Universitšat Hamburg, Germany 9 I.P.N. Orsay, Orsay, France 10 Now at ACCEL Instruments Gmb and detailed investigation of new elementary particles and their interactions. The highly successful Standard

  2. Nb-Pb superconducting RF-gun TESLA-FEL Report 2005-09

    E-Print Network [OSTI]

    continuous wave (cw) or near-cw operation of far future x-ray free electron laser facilities (XFELs) driven Jefferson National Accelerator Facility, 12000 Jefferson Ave., Newport News, VA 23606, USA J. Langner, P to operate at high duty factors also and provide good quality electron beams. An example of such an injector

  3. Failure Analysis of the Beam Vacuum in the Superconducting Cavities of the TESLA Main Linear Accelerator

    E-Print Network [OSTI]

    cryogenic units, resulting in 2.5 km long beam vacuum sections. There is considerable concern, that due - the beam vacuum and a separate input coupler vacuum; the other separates the input coupler vac- uum from the wave guide, which is supposedly filled with nitrogen or dry air. The beam vacuum systems at both sides

  4. Overview of Superconductivity and Challenges in Applications

    E-Print Network [OSTI]

    Flükiger, Rene

    2012-01-01T23:59:59.000Z

    Considerable progress has been achieved during the last few decades in the various fields of applied superconductivity, while the related low temperature technology has reached a high level. Magnetic resonance imaging (MRI) and nuclear magnetic resonance (NMR) are so far the most successful applications, with tens of thousands of units worldwide, but high potential can also be recognized in the energy sector, with high energy cables, transformers, motors, generators for wind turbines, fault current limiters and devices for magnetic energy storage. A large number of magnet and cable prototypes have been constructed, showing in all cases high reliability. Large projects involving the construction of magnets, solenoids as well as dipoles and quadrupoles are described in the present book. A very large project, the LHC, is currently in operation, demonstrating that superconductivity is a reliable technology, even in a device of unprecedented high complexity. A project of similar complexity is ITER, a fusion device...

  5. From Tesla's Lab to Los Alamos: Powerful Magnets Come Full Circle

    Broader source: Energy.gov [DOE]

    Learn about the most powerful non-destructive magnet in the world -- and how Nikola Tesla's work more than a century ago makes it possible.

  6. Superconducting materials for large scale applications

    SciTech Connect (OSTI)

    Scanlan, Ronald M.; Malozemoff, Alexis P.; Larbalestier, David C.

    2004-05-06T23:59:59.000Z

    Significant improvements in the properties ofsuperconducting materials have occurred recently. These improvements arebeing incorporated into the latest generation of wires, cables, and tapesthat are being used in a broad range of prototype devices. These devicesinclude new, high field accelerator and NMR magnets, magnets for fusionpower experiments, motors, generators, and power transmission lines.These prototype magnets are joining a wide array of existing applicationsthat utilize the unique capabilities of superconducting magnets:accelerators such as the Large Hadron Collider, fusion experiments suchas ITER, 930 MHz NMR, and 4 Tesla MRI. In addition, promising newmaterials such as MgB2 have been discovered and are being studied inorder to assess their potential for new applications. In this paper, wewill review the key developments that are leading to these newapplications for superconducting materials. In some cases, the key factoris improved understanding or development of materials with significantlyimproved properties. An example of the former is the development of Nb3Snfor use in high field magnets for accelerators. In other cases, thedevelopment is being driven by the application. The aggressive effort todevelop HTS tapes is being driven primarily by the need for materialsthat can operate at temperatures of 50 K and higher. The implications ofthese two drivers for further developments will be discussed. Finally, wewill discuss the areas where further improvements are needed in order fornew applications to be realized.

  7. Superconducting microfabricated ion traps

    E-Print Network [OSTI]

    Wang, Shannon Xuanyue

    We fabricate superconducting ion traps with niobium and niobium nitride and trap single [superscript 88]Sr ions at cryogenic temperatures. The superconducting transition is verified and characterized by measuring the ...

  8. DC Resistivity Survey (Dipole-Dipole Array) At Waunita Hot Springs...

    Open Energy Info (EERE)

    dipoles at each station. Injected currents of 6-8 amperes and a filtering frequency of 3.0 Hz were used. The profile dipole survey used a dipole with a length of 200 feet and...

  9. Superconducting RF Cryomodule Demagnetization

    E-Print Network [OSTI]

    Crawford, Anthony C

    2015-01-01T23:59:59.000Z

    This note presents measurements that support the proposition that it is feasible to demagnetize a fully assembled superconducting RF cryomodule.

  10. Basic principle of superconductivity

    E-Print Network [OSTI]

    Tian De Cao

    2009-11-10T23:59:59.000Z

    The basic principle of superconductivity is suggested in this paper. There have been two vital wrong suggestions on the basic principle, one is the relation between superconductivity and the Bose-Einstein condensation (BEC), and another is the relation between superconductivity and pseudogap.

  11. Superconducting Magnet Division

    E-Print Network [OSTI]

    McDonald, Kirk

    Superconducting Magnet Division Ramesh Gupta 20T Target Solenoid with HTS Insert Solenoid Capture Laboratory New York, USA http://www.bnl.gov/magnets/staff/gupta #12;Superconducting Magnet Division Ramesh of HTS may significantly reduce the amount of Tungsten shielding · Summary #12;Superconducting Magnet

  12. Zoomed Functional Imaging in the Human Brain at 7 Tesla with Simultaneous High Spatial and High Temporal Resolution

    E-Print Network [OSTI]

    Zoomed Functional Imaging in the Human Brain at 7 Tesla with Simultaneous High Spatial and High and is mainly limited by sensitivity. Here, signal-to-noise gains at high magnetic fields (7 Tesla

  13. Scripta Materialia 52 (2004) 461-466 Effect of 30 Tesla Magnetic Field on Transformations in a

    E-Print Network [OSTI]

    Cambridge, University of

    Scripta Materialia 52 (2004) 461-466 Effect of 30 Tesla Magnetic Field on Transformations transforms to ferrite. Thus, a 30 Tesla magnetic field can raise transformation temperatures by ~90°C during

  14. The cortical organization of audio-visual sentence comprehension: an fMRI study at 4 Tesla

    E-Print Network [OSTI]

    The cortical organization of audio-visual sentence comprehension: an fMRI study at 4 Tesla Cheryl M Tesla. Participants viewed the face and upper body of a speaker via a video screen while listening

  15. Cryogenic Test of a Coaxial Coupling Scheme for Fundamental and Higher Order Modes in Superconducting Cavities

    SciTech Connect (OSTI)

    J.K. Sekutowicz, P. Kneisel

    2009-05-01T23:59:59.000Z

    A coaxial coupling device located in the beam pipe of the TESLA type superconducting cavities provides for better propagation of Higher Order Modes (HOMs) and their strong damping in appropriate HOM couplers. Additionally, it also provides efficient coupling for fundamental mode RF power into the superconducting cavity. The whole coupling device can be designed as a detachable system. If appropriately dimensioned, the magnetic field can be minimized to a negligible level at the flange position. This scheme, presented previously*, provides for several advantages: strong HOM damping, flangeable solution, exchangeability of the HOM damping device on a cavity, less complexity of the superconducting cavity, possible cost advantages. This contribution will describe the results of the first cryogenic test.

  16. Protective link for superconducting coil

    DOE Patents [OSTI]

    Umans, Stephen D. (Belmont, MA)

    2009-12-08T23:59:59.000Z

    A superconducting coil system includes a superconducting coil and a protective link of superconducting material coupled to the superconducting coil. A rotating machine includes first and second coils and a protective link of superconducting material. The second coil is operable to rotate with respect to the first coil. One of the first and second coils is a superconducting coil. The protective link is coupled to the superconducting coil.

  17. Superconducting microfabricated ion traps

    E-Print Network [OSTI]

    Shannon X. Wang; Yufei Ge; Jaroslaw Labaziewicz; Eric Dauler; Karl Berggren; Isaac L. Chuang

    2010-12-14T23:59:59.000Z

    We fabricate superconducting ion traps with niobium and niobium nitride and trap single 88Sr ions at cryogenic temperatures. The superconducting transition is verified and characterized by measuring the resistance and critical current using a 4-wire measurement on the trap structure, and observing change in the rf reflection. The lowest observed heating rate is 2.1(3) quanta/sec at 800 kHz at 6 K and shows no significant change across the superconducting transition, suggesting that anomalous heating is primarily caused by noise sources on the surface. This demonstration of superconducting ion traps opens up possibilities for integrating trapped ions and molecular ions with superconducting devices.

  18. Relaxation Time Constants and Apparent Diffusion Coefficients of Rat Retina at 7 Tesla

    E-Print Network [OSTI]

    Duong, Timothy Q.

    Relaxation Time Constants and Apparent Diffusion Coefficients of Rat Retina at 7 Tesla Govind Nair* and ADC of the rat eyes were measured at 50 3 50 3 800 lm at 7 Tesla. Profiles of T1, T2, T2* and ADC

  19. Magnet Design of a Prototype Structure for the X-ray FELs at TESLA

    E-Print Network [OSTI]

    Magnet Design of a Prototype Structure for the X-ray FELs at TESLA M. Tischer, J. PflĂŒger Hamburger Synchrotronstrahlungslabor HASYLAB, DESY, Notkestr. 85, D-22603 Hamburg, Germany Abstract XFEL undulators for the TESLA device is suggested so that both field integrals are trimmed close to zero for all gaps. TESLA­FEL 2000

  20. THE VUV FREE ELECTRON LASER BASED ON THE TESLA TEST FACILITY AT DESY

    E-Print Network [OSTI]

    THE VUV FREE ELECTRON LASER BASED ON THE TESLA TEST FACILITY AT DESY J. Rossbach, for the TESLA FEL Collaboration Deutsches Elektronen-Synchrotron, DESY, 22603 Hamburg , Germany Abstract A Free-Electron Laser exceptionally well suited for a short-wavelength Free-Electron Laser: Excellent beam quality, mandatory

  1. Manufacturing Considerations of the Magnetic Structures for the Undulators for the X-FEL at TESLA

    E-Print Network [OSTI]

    1 Manufacturing Considerations of the Magnetic Structures for the Undulators for the X-FEL at TESLA DESY / HASYLAB Notkestr. 85, 22607 Hamburg, Germany TESLA-FEL 2000-10 Abstract A study is presented FELs. The total magnetic length of the magnet structures is 1405m. It is proposed to produce these huge

  2. TESLA-FEL 2003-04 Waveguide Monitors -a New Type of Beam Position

    E-Print Network [OSTI]

    TESLA-FEL 2003-04 Waveguide Monitors - a New Type of Beam Position Monitors for the TTF FEL U. Hahn Laser (FEL) at the TESLA Test Facilty (TTF) requires the electron trajectory to be aligned bench in the laboratory and with beam. TTF FEL measurement results are also presented and possible

  3. Field Accuracy Requirements for the Undulator Systems of the X-ray FEL's at TESLA

    E-Print Network [OSTI]

    Field Accuracy Requirements for the Undulator Systems of the X-ray FEL's at TESLA B. Faatz, J. 85, 22607 Hamburg, Germany Abstract In SASE FELs, the radiation power has to saturate in a single. The influence of the electron beam quality has been studied in detail in many papers. For the TESLA X-ray FEL

  4. TESLA Report 2004-02 Anti-multipactor TiN coating of RF power

    E-Print Network [OSTI]

    N layers generation on surfaces which were not protected in this way previously. Thin TiN films on ceramicTESLA Report 2004-02 1 Anti-multipactor TiN coating of RF power coupler components for TESLA performance of couplers) J. Lorkiewicz1 , The Andrzej Soltan Institute for Nuclear Studies, Pl 05-400 Otwock

  5. The Design and Dimensional Analysis of a Tesla Turbine

    E-Print Network [OSTI]

    Richardson, Bobby Dean

    1960-01-01T23:59:59.000Z

    . 12 square feet, 2024-T3 slclad aluminum alloy sheet. . 040 inch thick 10. 9 scluare feet. 5AE 30303 stainless steel sheet, . 025-inch thick 11. 2, ~KF, 6USOOS flange type self-aligning ball bearings The turbine case was formed by welding 1/4-inch...THE DESIGN AND DIMENSIONAL ANALYSIS OF A TESLA TURBINE A Thesis By BOBBY DEAN RICHARDBON Submitted to the Graduate School of the Agricultural and mechanical College of Texas in psrtial fulfillment of the requirements for the degree of ASTER...

  6. Fisker, Tesla, and American Auto Innovation | 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 DataDepartment of Energy Your Density Isn't YourTransport inEnergy June 6-7, 2013 MeetingEA #FebruaryFisker, Tesla, and American Auto

  7. Probabilistic Non-Repudiation for Source Authentication with TESLA Certificates in Hybrid Satellite/Wireless Networks and

    E-Print Network [OSTI]

    Baras, John S.

    Probabilistic Non-Repudiation for Source Authentication with TESLA Certificates in Hybrid Satellite describe a novel non-repudiation mechanism for an authentication protocol based on the extended TESLA to this problem, we have proposed a new class of lightweight, symmetric key certificates called extended TESLA

  8. 300 MHz RF coils for MR studies of Macaca mulatta brain at 7 Tesla Hellmut Merkle2

    E-Print Network [OSTI]

    Jegelka, Stefanie

    300 MHz RF coils for MR studies of Macaca mulatta brain at 7 Tesla Hellmut Merkle2 , Josef Pfeuffer, customized for a vertical ultra high field 7 Tesla system develop for vision research in the alert, trained macaque. Methods A prototype primate chair was designed and built for the vertical 7-Tesla/60-cm BRUKER

  9. Real-time magnetic resonance imagingguided radiofrequency atrial ablation and visualization of lesion formation at 3 Tesla

    E-Print Network [OSTI]

    Utah, University of

    of lesion formation at 3 Tesla Gaston R. Vergara, MD,* Sathya Vijayakumar, MS,* Eugene G. Kholmovski, Ph. In this study, we report a novel 3-Tesla RT -RI based porcine RF ablation model and visuali- zation of lesion-Tesla RT MRI-based catheter ablation and lesion visualization system. METHODS RF energy was delivered

  10. Influence of different focusing solutions for the TESLA X-ray FEL's on debunching of the electron beam

    E-Print Network [OSTI]

    Influence of different focusing solutions for the TESLA X-ray FEL's on debunching of the electron), Notkestr. 85, 22607 Hamburg, Germany Abstract For SASE-FELs the total undulator length increases different types of focusing for the TESLA X-ray FEL parameters will be discussed. 1. Introduction The TESLA

  11. Gravity waves from vortex dipoles and jets

    E-Print Network [OSTI]

    Wang, Shuguang

    2009-05-15T23:59:59.000Z

    The dissertation first investigates gravity wave generation and propagation from jets within idealized vortex dipoles using a nonhydrostatic mesoscale model. Several initially balanced and localized jets induced by vortex dipoles are examined here...

  12. Coaxial Coupling Scheme for TESLA/ILC-type Cavities

    SciTech Connect (OSTI)

    J.K. Sekutowicz, P. Kneisel

    2010-05-01T23:59:59.000Z

    This paper reports about our efforts to develop a flangeable coaxial coupler for both HOM and fundamental coupling for 9-cell TESLA/ILC-type cavities. The cavities were designed in early 90‘s for pulsed operation with a low duty factor, less than 1 %. The proposed design of the coupler has been done in a way, that the magnetic flux B at the flange connection is minimized and only a field of <5 mT would be present at the accelerating field Eacc of ~ 36 MV/m (B =150 mT in the cavity). Even though we achieved reasonably high Q-values at low field, the cavity/coupler combination was limited in the cw mode to only ~ 7 MV/m, where a thermally initiated degradation occurred. We have improved the cooling conditions by initially drilling radial channels every 30 degrees, then every 15 degrees into the shorting plate. The modified prototype performed well up to 9 MV/m in cw mode. This paper reports about our experiences with the further modified coaxial coupler and about test results in cw and low duty cycle pulsed mode, similar to the TESLA/ILC operation conditions.

  13. Collapse of Bose-Einstein condensates with dipole-dipole interactions Pavel M. Lushnikov*

    E-Print Network [OSTI]

    Lushnikov, Pavel

    * Theoretical Division, Los Alamos National Laboratory, MS-B284, Los Alamos, New Mexico 87545 and Landau. The net contribution of dipole-dipole interactions can be either repulsive positive dipole-dipole interactions can dominate provided polar molecules are oriented by strong enough electric field. Simi- lar

  14. Electric Dipole Moment of Magnetic Monopole

    E-Print Network [OSTI]

    Makoto Kobayashi

    2007-03-07T23:59:59.000Z

    The electric dipole moment of magnetic monopoles with spin is studied in the N=2 supersymmetric gauge theory. The dipole moments of the electric charge distributions, as well as the dipole moments due to the magnetic currents, are calculated. The contribution of charge distribution of the fermion to the gyroelectric ratio is expressed by using zeta(3).

  15. Philosophy 26 High Temperature Superconductivity

    E-Print Network [OSTI]

    Callender, Craig

    Philosophy 26 High Temperature Superconductivity By Ohm's Law, resistance will dim. Low temperature superconductivity was discovered in 1911 by Heike was explained by BCS theory. BCS theory explains superconductivity microscopically

  16. Superconductive radiofrequency window assembly

    DOE Patents [OSTI]

    Phillips, H.L.; Elliott, T.S.

    1998-05-19T23:59:59.000Z

    The present invention is a superconducting radiofrequency window assembly for use in an electron beam accelerator. The SRF window assembly has a superconducting metal-ceramic design. The SRF window assembly comprises a superconducting frame, a ceramic plate having a superconducting metallized area, and a superconducting eyelet for sealing plate into frame. The plate is brazed to eyelet which is then electron beam welded to frame. A method for providing a ceramic object mounted in a metal member to withstand cryogenic temperatures is also provided. The method involves a new metallization process for coating a selected area of a ceramic object with a thin film of a superconducting material. Finally, a method for assembling an electron beam accelerator cavity utilizing the SRF window assembly is provided. The procedure is carried out within an ultra clean room to minimize exposure to particulates which adversely affect the performance of the cavity within the electron beam accelerator. 11 figs.

  17. Superconducting radiofrequency window assembly

    DOE Patents [OSTI]

    Phillips, H.L.; Elliott, T.S.

    1997-03-11T23:59:59.000Z

    The present invention is a superconducting radiofrequency window assembly for use in an electron beam accelerator. The srf window assembly has a superconducting metal-ceramic design. The srf window assembly comprises a superconducting frame, a ceramic plate having a superconducting metallized area, and a superconducting eyelet for sealing plate into frame. The plate is brazed to eyelet which is then electron beam welded to frame. A method for providing a ceramic object mounted in a metal member to withstand cryogenic temperatures is also provided. The method involves a new metallization process for coating a selected area of a ceramic object with a thin film of a superconducting material. Finally, a method for assembling an electron beam accelerator cavity utilizing the srf window assembly is provided. The procedure is carried out within an ultra clean room to minimize exposure to particulates which adversely affect the performance of the cavity within the electron beam accelerator. 11 figs.

  18. Search for: superconduct* | DOE PAGES

    Office of Scientific and Technical Information (OSTI)

    superconduct* Find + Advanced Search Advanced Search All Fields: superconduct* Title: Full Text: Bibliographic Data: Creator Author: Name Name ORCID Search Authors Type: All...

  19. Report on the TESLA engineering study/review

    SciTech Connect (OSTI)

    C. Boffo et al.

    2002-07-18T23:59:59.000Z

    A team from Argonne National Lab, Cornell, Fermilab, Jefferson Lab, and SLAC has studied the TESLA TDR and its associated cost and manpower estimates, concentrating on the five largest cost sub-systems (Main Linac Modules, Main Linac RF Systems, Civil Engineering, Machine Infrastructure, and XFEL Incremental). These elements were concerned mainly with providing energy reach. We did not study the lower cost, but still technically challenging elements providing luminosity and physics capability, namely damping rings, beam delivery system, beam injection system, positron production, polarized beams, etc. The study did not attempt to validate the TDR cost estimates, but rather its purpose was to understand the technology and status of the large cost items, and the methodology by which their estimated cost was determined. In addition, topics of project oversight were studied.

  20. The NHMFL 60 tesla, 100 millisecond pulsed magnet

    SciTech Connect (OSTI)

    Boenig, H.J.; Campbell, L.J.; Rickel, D.G.; Rogers, J.D.; Schillig, J.B.; Sims, J.R. (Los Alamos National Lab., NM (United States)); Pernambuco-Wise, P.; Schneider-Muntau, H.J. (Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab.)

    1992-11-09T23:59:59.000Z

    Among the new facilities to be offered by the National Science Foundation through the National High Magnetic Field Laboratory (NHMFL) are pulsed fields that can only be achieved at a national user facility by virtue of their strength, duration, and volume. In particular, a 44 mm bore pulsed magnet giving a 60 tesla field for 100 ms is in the final design stage. This magnet will be powered by a 1.4 GW motor-generator at Los Alamos and is an important step toward proving design principles that will be needed for the higher field quasi-stationary pulsed magnets that this power source is capable of driving. This report will discuss specifications and parameters of this magnet.

  1. TESTING OF ACCELERATOR DIPOLES IN PRESSURIZED SUPERFLUID HELIUM

    E-Print Network [OSTI]

    Gilbert, W.S.

    2010-01-01T23:59:59.000Z

    Energy under Contract W-7405-ENG-48 TESTING OF ACCELERATOREnergy under Contract W-7405-ENG-48. B(tesla) Fig 3. ESD-10:

  2. RHIC spin flipper AC dipole controller

    SciTech Connect (OSTI)

    Oddo, P.; Bai, M.; Dawson, C.; Gassner, D.; Harvey, M.; Hayes, T.; Mernick, K.; Minty, M.; Roser, T.; Severino, F.; Smith, K.

    2011-03-28T23:59:59.000Z

    The RHIC Spin Flipper's five high-Q AC dipoles which are driven by a swept frequency waveform require precise control of phase and amplitude during the sweep. This control is achieved using FPGA based feedback controllers. Multiple feedback loops are used to and dynamically tune the magnets. The current implementation and results will be presented. Work on a new spin flipper for RHIC (Relativistic Heavy Ion Collider) incorporating multiple dynamically tuned high-Q AC-dipoles has been developed for RHIC spin-physics experiments. A spin flipper is needed to cancel systematic errors by reversing the spin direction of the two colliding beams multiple times during a store. The spin flipper system consists of four DC-dipole magnets (spin rotators) and five AC-dipole magnets. Multiple AC-dipoles are needed to localize the driven coherent betatron oscillation inside the spin flipper. Operationally the AC-dipoles form two swept frequency bumps that minimize the effect of the AC-dipole dipoles outside of the spin flipper. Both AC bumps operate at the same frequency, but are phase shifted from each other. The AC-dipoles therefore require precise control over amplitude and phase making the implementation of the AC-dipole controller the central challenge.

  3. TESLA*HERA Based gamma-p and gamma-A Colliders

    E-Print Network [OSTI]

    A. K. Ciftci; S. Sultansoy; O. Yavas

    2000-07-05T23:59:59.000Z

    Main parameters and physics search potential of gamma-p and gamma-A colliders, which will be available due to constructing the TESLA linear electron-positron collider tangentially to the HERA proton ring, are discussed.

  4. Top 11 Things You Didn't Know About Nikola Tesla | Department...

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

    at 12:30 p.m. EST. 11. Tesla was born on July 10, 1856, in the Austrian Empire, now Croatia. He was the fourth of five children. After a checkered academic career in Europe, he...

  5. TESLA FEL Report 200602 Finite Element Analyses for RF Photoinjector Gun Cavities

    E-Print Network [OSTI]

    Cavities F. Marhauser BESSY GmbH #12;TESLA FEL Report 200602 Contents 1. INTRODUCTION. Marhauser BESSY, AlbertEinstein Straße 15, D12489 Berlin, Germany Abstract This paper details

  6. Beyond Tesla and Edison: Other Luminaries from the Age of Electricity

    Broader source: Energy.gov [DOE]

    From electric chairs to machine guns to Gila monsters, learn more about the great minds and eccentric characters who were contemporaries of Edison and Tesla in the early days of electricity.

  7. Design of a horizontal test cryostat for superconducting RF cavities for the FREIA facility at Uppsala University

    SciTech Connect (OSTI)

    Chevalier, N. R.; Thermeau, J.-P.; Bujard, P.; Junquera, T. [Accelerators and Cryogenic Systems (ACS), 86 rue de Paris, 91400 Orsay (France); Hermansson, L.; Kern, R. Santiago; Ruber, R. [Uppsala University, Department of Physics and Astronomy, 75120 Uppsala (Sweden)

    2014-01-29T23:59:59.000Z

    Uppsala University is constructing a large scale facility, called FREIA (Facility for Research Instrumentation and Accelerator Development). FREIA includes a helium liquefier and an accelerator test facility and has the capacity to test superconducting radio-frequency (RF) cavities with the same RF system and RF power level as in an accelerator. A central element of FREIA is a horizontal test cryostat connected in closed loop to a helium liquefier. This cryostat can house two fully equipped (tuners, piezo, power coupler, helium tank) superconducting cavities to perform full RF high power tests and operate at temperatures between 1.8 K and 4.2 K. The cryostat is designed to accommodate a large array of superconducting cavities and magnets, among which the European Spallation Source (ESS) type spoke and high-? elliptical cavities as well as TESLA/ILC type elliptical cavities. The present status of the project and the design of the cryostat are reported.

  8. Beamstrahlung Photon Load on the TESLA Extraction Septum Blade(LCC-0104)

    SciTech Connect (OSTI)

    Seryi, A

    2003-10-02T23:59:59.000Z

    This note describes work performed in the framework of the International Linear Collider Technical Review Committee [1] to estimate the power load on the TESLA extraction septum blade due to beamstrahlung photons. It is shown, that under realistic conditions the photon load can be several orders of magnitude higher than what was estimated in the TESLA TDR [2] for the ideal Gaussian beams, potentially representing a serious limitation of the current design.

  9. Superconducting Radiofrequency (SRF) Accelerator Cavities

    ScienceCinema (OSTI)

    Reece, Charlie

    2014-05-22T23:59:59.000Z

    Charlie Reece, an accelerator technology scientist, explains how superconducting radiofrequency accelerator cavities work.

  10. Superconducting Magnet Technology for Future Hadron Colliders

    E-Print Network [OSTI]

    Scanlan, R.M.

    2011-01-01T23:59:59.000Z

    I. Superconducting Magnet Technology for Future Hadl"On1994. M.N. Wilson, Superconducting Magnets (Clarendon Press,The application of superconducting magnets to large-scale

  11. Superconducting vortex pinning with artificially prepared nanostructures

    E-Print Network [OSTI]

    Rosen, Yaniv Jacob

    K. Schuller, “Enhanced superconducting vortex pinning withat T/Tc = 0.99 of a superconducting Nb thin film on aof the triangles. The superconducting critical temperature

  12. NLO evolution of color dipoles

    SciTech Connect (OSTI)

    Ian Balitsky; Giovanni Chirilli

    2008-01-01T23:59:59.000Z

    The small-x deep inelastic scattering in the saturation region is governed by the non-linear evolution of Wilson-lines operators. In the leading logarithmic approximation it is given by the BK equation for the evolution of color dipoles. In the next-to-leaing order the BK equation gets contributions from quark and gluon loops as well as from the tree gluon diagrams with quadratic and cubic nonlinearities. We calculate the gluon contribution to small-x evolution of Wilson lines (the quark part was obtained earlier).

  13. NLO evolution of color dipoles

    E-Print Network [OSTI]

    Ian Balitsky; Giovanni A. Chirilli

    2007-10-23T23:59:59.000Z

    The small-$x$ deep inelastic scattering in the saturation region is governed by the non-linear evolution of Wilson-line operators. In the leading logarithmic approximation it is given by the BK equation for the evolution of color dipoles. In the next-to-leading order the BK equation gets contributions from quark and gluon loops as well as from the tree gluon diagrams with quadratic and cubic nonlinearities. We calculate the gluon contribution to small-x evolution of Wilson lines (the quark part was obtained earlier).

  14. Electric dipole moments, from e to tau

    E-Print Network [OSTI]

    A. G. Grozin; I. B. Khriplovich; A. S. Rudenko

    2008-12-12T23:59:59.000Z

    We derive an upper limit on the electric dipole moment (EDM) of the tau-lepton, which follows from the precision measurements of the electron EDM.

  15. Electric dipole moments, from e to tau

    E-Print Network [OSTI]

    Grozin, A G; Rudenko, A S

    2008-01-01T23:59:59.000Z

    We derive an upper limit on the electric dipole moment (EDM) of the tau-lepton, which follows from the precision measurements of the electron EDM.

  16. Electric dipole moments, from e to {tau}

    SciTech Connect (OSTI)

    Grozin, A. G., E-mail: A.G.Grozin@inp.nsk.su; Khriplovich, I. B., E-mail: khriplovich@inp.nsk.su; Rudenko, A. S., E-mail: saber_@inbox.r [Budker Institute of Nuclear Physics (Russian Federation)

    2009-07-15T23:59:59.000Z

    We derive an upper limit on the electric dipole moment (EDM) of the {tau}-lepton, which follows from the precision measurements of the electron EDM.

  17. Axion Induced Oscillating Electric Dipole Moments

    E-Print Network [OSTI]

    Hill, Christopher T

    2015-01-01T23:59:59.000Z

    The axion electromagnetic anomaly induces an oscillating electric dipole for any static magnetic dipole. Static electric dipoles do not produce oscillating magnetic moments. This is a low energy theorem which is a consequence of the space-time dependent cosmic background field of the axion. The electron will acquire an oscillating electric dipole of frequency $m_a$ and strength $\\sim 10^{-32}$ e-cm, two orders of magnitude above the nucleon, and within four orders of magnitude of the present standard model DC limit. This may suggest sensitive new experimental venues for the axion dark matter search.

  18. Fluctuations in systemsFluctuations in systems with superconducting islandswith superconducting islands

    E-Print Network [OSTI]

    Fominov, Yakov

    Fluctuations in systemsFluctuations in systems with superconducting islandswith superconductingTwo mechanism of TTcc suppressionsuppression #12;SuperconductingSuperconductingmetal transitionsmetal: Superconductive transitionGrains: Superconductive transition #12;Islands on a film: what's the difference

  19. Superconducting active impedance converter

    DOE Patents [OSTI]

    Ginley, D.S.; Hietala, V.M.; Martens, J.S.

    1993-11-16T23:59:59.000Z

    A transimpedance amplifier for use with high temperature superconducting, other superconducting, and conventional semiconductors allows for appropriate signal amplification and impedance matching to processing electronics. The amplifier incorporates the superconducting flux flow transistor into a differential amplifier configuration which allows for operation over a wide temperature range, and is characterized by high gain, relatively low noise, and response times less than 200 picoseconds over at least a 10-80 K. temperature range. The invention is particularly useful when a signal derived from either far-IR focal plane detectors or from Josephson junctions is to be processed by higher signal/higher impedance electronics, such as conventional semiconductor technology. 12 figures.

  20. Introduction to Color Superconductivity

    E-Print Network [OSTI]

    G. Nardulli

    2006-10-23T23:59:59.000Z

    At high nuclear density and small temperature, due to the asymptotic freedom property of Quantum ChromoDynamics and to the existence of an attractive channel in the color interaction, diquark condensates might be formed. Since these condensates break the color gauge symmetry, this phenomenon has the name of color superconductivity. In the last few years this has become a very active field of research. While a direct experimental test is still missing, color superconductivity might have implications in astrophysics because for some compact stars, e.g. pulsars, the baryon densities necessary for color superconductivity can probably be reached.

  1. Superconducting active impedance converter

    DOE Patents [OSTI]

    Ginley, David S. (Albuquerque, NM); Hietala, Vincent M. (Placitas, NM); Martens, Jon S. (Albuquerque, NM)

    1993-01-01T23:59:59.000Z

    A transimpedance amplifier for use with high temperature superconducting, other superconducting, and conventional semiconductor allows for appropriate signal amplification and impedance matching to processing electronics. The amplifier incorporates the superconducting flux flow transistor into a differential amplifier configuration which allows for operation over a wide temperature range, and is characterized by high gain, relatively low noise, and response times less than 200 picoseconds over at least a 10-80 K. temperature range. The invention is particularly useful when a signal derived from either far-IR focal plane detectors or from Josephson junctions is to be processed by higher signal/higher impedance electronics, such as conventional semiconductor technology.

  2. MAPPING HUMAN BRAIN FUNCTION WITH MRI AT 7 TESLA Xiaoping HU, Essa YACOUB, Josef PFEUFFER, Amir SCHUMEL,

    E-Print Network [OSTI]

    in a group of subjects at both 7 Tesla and 4 Telsa[1]. Functional MRI data were collected with multiple TEs

  3. Design and Test of a Nb3Sn Subscale Dipole Magnet for Training Studies

    SciTech Connect (OSTI)

    Felice, Helene; Caspi, Shlomo; Dietderich, Daniel R.; Felice, Helene; Ferracin, Paolo; Gourlay, Steve A.; Hafalia, Aurelo R.; Lietzke, Alan F.; Mailfert, Alain; Sabbi, GainLuca; Vedrine, Pierre

    2007-06-01T23:59:59.000Z

    As part of a collaboration between CEA/Saclay and the Superconducting Magnet Group at LBNL, a subscale dipole structure has been developed to study training in Nb3Sn coils under variable pre-stress conditions. This design is derived from the LBNL Subscale Magnet and relies on the use of identical Nb{sub 3}Sn racetrack coils. Whereas the original LBNL subscale magnet was in a dual bore 'common-coil' configuration, the new subscale dipole magnet (SD) is assembled as a single bore dipole made of two superposed racetrack coils. The dipole is supported by a new mechanical structure developed to withstand the horizontal and axial Lorentz forces and capable of applying variable vertical, horizontal and axial preload. The magnet was tested at LBNL as part of a series of training studies aiming at understanding of the relation between pre-stress and magnet performance. Particular attention is given to the coil ends where the magnetic field peaks and stress conditions are the least understood. After a description of SD design, assembly, cool-down and tests results are reported and compared with the computations of the OPERA3D and ANSYS magnetic and mechanical models.

  4. Radiation effects in a muon collider ring and dipole magnet protection

    SciTech Connect (OSTI)

    Mokhov, N.V.; Kashikhin, V.V.; Novitski, I.; Zlobin, A.V.; /Fermilab

    2011-03-01T23:59:59.000Z

    The requirements and operating conditions for a Muon Collider Storage Ring (MCSR) pose significant challenges to superconducting magnets. The dipole magnets should provide a high magnetic field to reduce the ring circumference and thus maximize the number of muon collisions during their lifetime. One third of the beam energy is continuously deposited along the lattice by the decay electrons at the rate of 0.5 kW/m for a 1.5-TeV c.o.m. and a luminosity of 10{sup 34} cm{sup -2}s{sup -1}. Unlike dipoles in proton machines, the MCSR dipoles should allow this dynamic heat load to escape the magnet helium volume in the horizontal plane, predominantly towards the ring center. This paper presents the analysis and comparison of radiation effects in MCSR based on two dipole magnets designs. Tungsten masks in the interconnect regions are used in both cases to mitigate the unprecedented dynamic heat deposition and radiation in the magnet coils.

  5. Superconducting thermoelectric generator

    DOE Patents [OSTI]

    Metzger, J.D.; El-Genk, M.S.

    1998-05-05T23:59:59.000Z

    An apparatus and method for producing electricity from heat is disclosed. The present invention is a thermoelectric generator that uses materials with substantially no electrical resistance, often called superconductors, to efficiently convert heat into electrical energy without resistive losses. Preferably, an array of superconducting elements is encased within a second material with a high thermal conductivity. The second material is preferably a semiconductor. Alternatively, the superconducting material can be doped on a base semiconducting material, or the superconducting material and the semiconducting material can exist as alternating, interleaved layers of waferlike materials. A temperature gradient imposed across the boundary of the two materials establishes an electrical potential related to the magnitude of the temperature gradient. The superconducting material carries the resulting electrical current at zero resistivity, thereby eliminating resistive losses. The elimination of resistive losses significantly increases the conversion efficiency of the thermoelectric device. 4 figs.

  6. Superconducting thermoelectric generator

    DOE Patents [OSTI]

    Metzger, John D. (Eaton's Neck, NY); El-Genk, Mohamed S. (Albuquerque, NM)

    1998-01-01T23:59:59.000Z

    An apparatus and method for producing electricity from heat. The present invention is a thermoelectric generator that uses materials with substantially no electrical resistance, often called superconductors, to efficiently convert heat into electrical energy without resistive losses. Preferably, an array of superconducting elements is encased within a second material with a high thermal conductivity. The second material is preferably a semiconductor. Alternatively, the superconducting material can be doped on a base semiconducting material, or the superconducting material and the semiconducting material can exist as alternating, interleaved layers of waferlike materials. A temperature gradient imposed across the boundary of the two materials establishes an electrical potential related to the magnitude of the temperature gradient. The superconducting material carries the resulting electrical current at zero resistivity, thereby eliminating resistive losses. The elimination of resistive losses significantly increases the conversion efficiency of the thermoelectric device.

  7. Superconducting thermoelectric generator

    DOE Patents [OSTI]

    Metzger, J.D.; El-Genk, M.S.

    1996-01-01T23:59:59.000Z

    An apparatus and method for producing electricity from heat. The present invention is a thermoelectric generator that uses materials with substantially no electrical resistance, often called superconductors, to efficiently convert heat into electrical energy without resistive losses. Preferably, an array of superconducting elements is encased within a second material with a high thermal conductivity. The second material is preferably a semiconductor. Alternatively, the superconducting material can be doped on a base semiconducting material, or the superconducting material and the semiconducting material can exist as alternating, interleaved layers of waferlike materials. A temperature gradient imposed across the boundary of the two materials establishes an electrical potential related to the magnitude of the temperature gradient. The superconducting material carries the resulting electrical current at zero resistivity, thereby eliminating resistive losses. The elimination of resistive losses significantly increases the conversion efficiency of the thermoelectric device.

  8. Superconducting transmission line particle detector

    DOE Patents [OSTI]

    Gray, Kenneth E. (Naperville, IL)

    1989-01-01T23:59:59.000Z

    A microvertex particle detector for use in a high energy physic collider including a plurality of parallel superconducting thin film strips separated from a superconducting ground plane by an insulating layer to form a plurality of superconducting waveguides. The microvertex particle detector indicates passage of a charged subatomic particle by measuring a voltage pulse measured across a superconducting waveguide caused by the transition of the superconducting thin film strip from a superconducting to a non-superconducting state in response to the passage of a charged particle. A plurality of superconducting thin film strips in two orthogonal planes plus the slow electromagnetic wave propogating in a superconducting transmission line are used to resolve N.sup.2 ambiguity of charged particle events.

  9. Superconducting transmission line particle detector

    DOE Patents [OSTI]

    Gray, K.E.

    1988-07-28T23:59:59.000Z

    A microvertex particle detector for use in a high energy physic collider including a plurality of parallel superconducting thin film strips separated from a superconducting ground plane by an insulating layer to form a plurality of superconducting waveguides. The microvertex particle detector indicates passage of a charged subatomic particle by measuring a voltage pulse measured across a superconducting waveguide caused by the transition of the superconducting thin film strip from a superconducting to a non- superconducting state in response to the passage of a charged particle. A plurality of superconducting thin film strips in two orthogonal planes plus the slow electromagnetic wave propagating in a superconducting transmission line are used to resolve N/sup 2/ ambiguity of charged particle events. 6 figs.

  10. The Pygmy Dipole Resonance -history and overview

    E-Print Network [OSTI]

    Zilges, Andreas

    Dipole Resonance (GDR) Phys. Rev. 71 (1947) 3 1947: Photo-Fission in Uranium #12;Giant Dipole Resonance of symmetry energy in EoS A. Carbone et al. PRC 81 (2010) 041301(R) #12;Relevance of PDR · Universal collective excitation mode · Connection to neutron radius, neutron skin · Slope of symmetry energy in EoS

  11. Lithium electric dipole polarizability M. Puchalski

    E-Print Network [OSTI]

    Pachucki, Krzysztof

    Lithium electric dipole polarizability M. Puchalski Faculty of Chemistry, Adam Mickiewicz, 00-681 Warsaw, Poland The electric dipole polarizability of the lithium atom in the ground state phenomena, such as van der Waals interactions in ultra-cold collisions [1­3] and Bose- Einstein condensation

  12. High temperature interfacial superconductivity

    DOE Patents [OSTI]

    Bozovic, Ivan (Mount Sinai, NY); Logvenov, Gennady (Port Jefferson Station, NY); Gozar, Adrian Mihai (Port Jefferson, NY)

    2012-06-19T23:59:59.000Z

    High-temperature superconductivity confined to nanometer-scale interfaces has been a long standing goal because of potential applications in electronic devices. The spontaneous formation of a superconducting interface in bilayers consisting of an insulator (La.sub.2CuO.sub.4) and a metal (La.sub.1-xSr.sub.xCuO.sub.4), neither of which is superconducting per se, is described. Depending upon the layering sequence of the bilayers, T.sub.c may be either .about.15 K or .about.30 K. This highly robust phenomenon is confined to within 2-3 nm around the interface. After exposing the bilayer to ozone, T.sub.c exceeds 50 K and this enhanced superconductivity is also shown to originate from a 1 to 2 unit cell thick interfacial layer. The results demonstrate that engineering artificial heterostructures provides a novel, unconventional way to fabricate stable, quasi two-dimensional high T.sub.c phases and to significantly enhance superconducting properties in other superconductors. The superconducting interface may be implemented, for example, in SIS tunnel junctions or a SuFET.

  13. Superconducting radiofrequency window assembly

    DOE Patents [OSTI]

    Phillips, Harry L. (Seaford, VA); Elliott, Thomas S. (Yorktown, VA)

    1997-01-01T23:59:59.000Z

    The present invention is a superconducting radiofrequency window assembly for use in an electron beam accelerator. The srf window assembly (20) has a superconducting metal-ceramic design. The srf window assembly (20) comprises a superconducting frame (30), a ceramic plate (40) having a superconducting metallized area, and a superconducting eyelet (50) for sealing plate (40) into frame (30). The plate (40) is brazed to eyelet (50) which is then electron beam welded to frame (30). A method for providing a ceramic object mounted in a metal member to withstand cryogenic temperatures is also provided. The method involves a new metallization process for coating a selected area of a ceramic object with a thin film of a superconducting material. Finally, a method for assembling an electron beam accelerator cavity utilizing the srf window assembly is provided. The procedure is carried out within an ultra clean room to minimize exposure to particulates which adversely affect the performance of the cavity within the electron beam accelerator.

  14. Superconductive radiofrequency window assembly

    DOE Patents [OSTI]

    Phillips, Harry Lawrence (Seaford, VA); Elliott, Thomas S. (Yorktown, VA)

    1998-01-01T23:59:59.000Z

    The present invention is a superconducting radiofrequency window assembly for use in an electron beam accelerator. The srf window assembly (20) has a superconducting metal-ceramic design. The srf window assembly (20) comprises a superconducting frame (30), a ceramic plate (40) having a superconducting metallized area, and a superconducting eyelet (50) for sealing plate (40) into frame (30). The plate (40) is brazed to eyelet (50) which is then electron beam welded to frame (30). A method for providing a ceramic object mounted in a metal member to withstand cryogenic temperatures is also provided. The method involves a new metallization process for coating a selected area of a ceramic object with a thin film of a superconducting material. Finally, a method for assembling an electron beam accelerator cavity utilizing the srf window assembly is provided. The procedure is carried out within an ultra clean room to minimize exposure to particulates which adversely affect the performance of the cavity within the electron beam accelerator.

  15. Decay Processes in the Presence of Thin Superconducting Films

    E-Print Network [OSTI]

    Per K. Rekdal; Bo-Sture K. Skagerstam

    2006-09-20T23:59:59.000Z

    In a recent paper [Phys. Rev. Lett. 97, 070401 (2006)] the transition rate of magnetic spin-flip of a neutral two-level atom trapped in the vicinity of a thick superconducting body was studied. In the present paper we will extend these considerations to a situation with an atom at various distances from a dielectric film. Rates for the corresponding electric dipole-flip transition will also be considered. The rates for these atomic flip transitions can be reduced or enhanced, and in some situations they can even be completely suppressed. For a superconducting film or a thin film of a perfect conducting material various analytical expressions are derived that reveals the dependence of the physical parameters at hand.

  16. Higgs-boson production at the Photon Collider at TESLA

    E-Print Network [OSTI]

    Piotr Niezurawski

    2005-03-31T23:59:59.000Z

    In this thesis feasibility of the precise measurement of the Higgs-boson production cross section gamma+gamma->higgs->b+bbar at the Photon Collider at TESLA is studied in detail. The study is based on the realistic luminosity spectra simulation. The heavy quark background is estimated using the dedicated code based on NLO QCD calculations. Other background processes, which were neglected in the earlier analyses, are also studied. Also the contribution from the overlaying events, gamma+gamma->hadrons, is taken into account. The non-zero beam crossing angle and the finite size of colliding bunches are included in the event generation. The analysis is based on the full detector simulation with realistic b-tagging, and the criteria of event selection are optimized separately for each considered Higgs-boson mass. For the Standard-Model Higgs boson with mass of 120 to 160 GeV the partial width \\Gamma(h->gamma+gamma)BR(h->b+bbar) can be measured with a statistical accuracy of 2.1-7.7% after one year of the Photon Collider running. The systematic uncertainties of the measurement are estimated to be of the order of 2%. For MSSM Higgs bosons A and H, for M_A=200-350 GeV and tan(beta)=7, the statistical precision of the cross-section measurement is estimated to be 8--34%, for four considered MSSM parameters sets. As heavy neutral Higgs bosons in this scenario may not be discovered at LHC or at the first stage of the e+e- collider, an opportunity of being a discovery machine is also studied for the Photon Collider.

  17. Dipole gravity waves from unbound quadrupoles

    E-Print Network [OSTI]

    Felber, Franklin

    2010-01-01T23:59:59.000Z

    Dipole gravitational disturbances from gravitationally unbound mass quadrupoles propagate to the radiation zone with signal strength at least of quadrupole order if the quadrupoles are nonrelativistic, and of dipole order if relativistic. Angular distributions of parallel-polarized and transverse-polarized dipole power in the radiation zone are calculated for simple unbound quadrupoles, like a linear-oscillator/stress-wave pair and a particle storage ring. Laboratory tests of general relativity through measurements of dipole gravity waves in the source region are proposed. A NASA G2 flywheel module with a modified rotor can produce a post-Newtonian dc bias signal at a gradiometer up to 1 mE. At peak luminosity, the repulsive dipole impulses of proton bunches at the LHC can produce an rms velocity of a high-Q detector surface up to 4 micron/s. Far outside the source region, Newtonian lunar dipole gravity waves can produce a 1-cm displacement signal at LISA. Dipole signal strengths of astrophysical events invol...

  18. Dipole gravity waves from unbound quadrupoles

    E-Print Network [OSTI]

    Franklin Felber

    2010-06-10T23:59:59.000Z

    Dipole gravitational disturbances from gravitationally unbound mass quadrupoles propagate to the radiation zone with signal strength at least of quadrupole order if the quadrupoles are nonrelativistic, and of dipole order if relativistic. Angular distributions of parallel-polarized and transverse-polarized dipole power in the radiation zone are calculated for simple unbound quadrupoles, like a linear-oscillator/stress-wave pair and a particle storage ring. Laboratory tests of general relativity through measurements of dipole gravity waves in the source region are proposed. A NASA G2 flywheel module with a modified rotor can produce a post-Newtonian dc bias signal at a gradiometer up to 1 mE. At peak luminosity, the repulsive dipole impulses of proton bunches at the LHC can produce an rms velocity of a high-Q detector surface up to 4 micron/s. Far outside the source region, Newtonian lunar dipole gravity waves can produce a 1-cm displacement signal at LISA. Dipole signal strengths of astrophysical events involving unbound quadrupoles, like near collisions and neutron star kicks in core-collapse supernovae, are estimated.

  19. Witten Index and Superconducting Strings

    E-Print Network [OSTI]

    V. K. Oikonomou

    2010-01-14T23:59:59.000Z

    The Yukawa interaction sector of superstring inspired models that give superconducting strings, can be described in terms of a supersymmetric quantum mechanics algebra. We relate the Witten index of susy quantum mechanics with an index characteristic to superconducting string models.

  20. Specific Absorption Rate Studies of the Parallel Transmission of Inner-Volume Selective Excitations at 7 Tesla A. C. ZELINSKI

    E-Print Network [OSTI]

    Goyal, Vivek K

    at 7 Tesla A. C. ZELINSKI 1 , L. M. ANGELONE 2 , V. K. GOYAL 1 , G. BONMASSAR 2 , E. ADALSTEINSSON 1 excitations via regional cancellation. Here, we study average and local SAR in a head model at 7 Tesla for 2D

  1. Inhomogeneity Mitigation at 7 Tesla using Sparsity-Enforced Spatially-Tailored Slice-Selective Excitation Pulses A. C. ZELINSKI

    E-Print Network [OSTI]

    Goyal, Vivek K

    In Vivo B1 + Inhomogeneity Mitigation at 7 Tesla using Sparsity-Enforced Spatially-Tailored Slice's duration & B1 + is in Tesla/volt. Let R(r) (r)·B1 - (r). With a reset pulse [5], IV(r) = c·R(r)·[1-E1(r

  2. Test of a NbTi Superconducting Quadrupole Magnet Based on Alternating Helical Windings

    SciTech Connect (OSTI)

    Caspi, S.; Trillaud, F.; Godeke, A.; Dietderich, D.; Ferracin, P.; Sabbi, G.; Giloux, C.; Perez, J. G.; Karppinen, M.

    2009-08-16T23:59:59.000Z

    It has been shown that by superposing two solenoid-like thin windings, that are oppositely skewed (tilted) with respect to the bore axis, the combined current density on the surface is cos({theta})-like and the resulting magnetic field in the bore is a pure dipole field. Following a previous test of such a superconducting dipole magnet, a quadrupole magnet was designed and built using similar principles. This paper describes the design, construction and test of a 75 mm bore 600 mm long superconducting quadrupole made with NbTi wire. The simplicity of the design, void of typical wedges, end-spacers and coil assembly, is especially suitable for future high field insert coils using Nb{sub 3}Sn as well as HTS wires. The 3 mm thick coil reached 46 T/m but did not achieve its current plateau.

  3. HUMAN BRAIN IMAGING AT 9.4 TESLA USING A COMBINATION OF TRAVELING WAVE EXCITATION WITH A 15-CHANNEL RECEIVE-ONLY ARRAY

    E-Print Network [OSTI]

    HUMAN BRAIN IMAGING AT 9.4 TESLA USING A COMBINATION OF TRAVELING WAVE EXCITATION WITH A 15-CHANNEL is a successful setup for routine human brain imaging at 7 Tesla. For reception, the use of multiple surface coils multichannel transmit coils. At 9.4 Tesla, however, the even shorter RF wavelength in tissue causes the B1

  4. Design Parameters for a 7.2 Tesla Bending Magnet for a 1.5 GeV Compact Light Source

    E-Print Network [OSTI]

    Green, M.A.

    2011-01-01T23:59:59.000Z

    a Central Induction of 7 tesla [l] D. B. Cline A. A. Gmen.Design Parameters for a 7.2 Tesla Bending Magnet for a 1.5Design Parameters for a 7.2 Tesla Bending Magnet for a 1.5

  5. Superconductivity and Magnetism: Materials Properties

    E-Print Network [OSTI]

    .g. within high-Tc superconductivity, magnetic superconductors, MgB2, CMR materials, nanomagnetism and spin#12;#12;Superconductivity and Magnetism: Materials Properties and Developments #12;Copyright 2003 RisĂž National Laboratory Roskilde, Denmark ISBN 87-550-3244-3 ISSN 0907-0079 #12;Superconductivity

  6. Interplay of superconductivity, magnetism, and density waves in rare-earth tritellurides and iron-based superconducting materials

    E-Print Network [OSTI]

    Zocco, Diego Andrés

    2011-01-01T23:59:59.000Z

    B. Superconductivity . . . . . . . . . . . . . . . . .IV Superconductivity and Magnetism in Iron-PnictideSearch for Pressure Induced Superconductivity in Undoped Ce-

  7. Orbit Spaces in Superconductivity

    E-Print Network [OSTI]

    Vittorino Talamini

    2006-07-30T23:59:59.000Z

    In the framework of Landau theory of phase transitions one is interested to describe all the possible low symmetry ``superconducting'' phases allowed for a given superconductor crystal and to determine the conditions under which this crystal undergoes a phase transition. These problems are best described and analyzed in the orbit space of the high symmetry group of the ``normal, non-superconducting'' phase of the crystal. In this article it is worked out a simple example concerning superconductivity, that shows the P-matrix method to determine the equations and inequalities defining the orbit space and its stratification. This approach is of general validity and can be used in all physical problems that make use of invariant functions, as long as the symmetry group is compact.

  8. Supertubes versus superconducting tubes

    E-Print Network [OSTI]

    Ruben Cordero; Efrain Rojas

    2005-05-13T23:59:59.000Z

    In this paper we show the relationship between cylindrical D2-branes and cylindrical superconducting membranes described by a generic effective action at the bosonic level. In the first case the extended objects considered, arose as blown up type IIA superstrings to D2-branes, named supertubes. In the second one, the cosmological objects arose from some sort of field theories. The Dirac-Born-Infeld action describing supertubes is shown to be equivalent to the generic effective action describing superconducting membranes via a special transformation.

  9. Magnetic dipole discharges. III. Instabilities

    SciTech Connect (OSTI)

    Stenzel, R. L.; Urrutia, J. M. [Department of Physics and Astronomy, University of California Los Angeles, California 90095-1547 (United States)] [Department of Physics and Astronomy, University of California Los Angeles, California 90095-1547 (United States); Ionita, C.; Schrittwieser, R. [Institute for Ion Physics and Applied Physics, University of Innsbruck A-6020 Innsbruck (Austria)] [Institute for Ion Physics and Applied Physics, University of Innsbruck A-6020 Innsbruck (Austria)

    2013-08-15T23:59:59.000Z

    Instabilities in a cross-field discharge around a permanent magnet have been investigated. The permanent magnet serves as a cold cathode and the chamber wall as an anode. The magnet is biased strongly negative and emits secondary electrons due to impact of energetic ions. The electrons outside the sheath are confined by the strong dipolar magnetic field and by the ion-rich sheath surrounding the magnet. The electron energy peaks in the equatorial plane where most ionization occurs and the ions are trapped in a negative potential well. The discharge mechanism is the same as that of cylindrical and planar magnetrons, but here extended to a 3-D cathode geometry using a single dipole magnet. While the basic properties of the discharge are presented in a companion paper, the present focus is on various observed instabilities. The first is an ion sheath instability which oscillates the plasma potential outside the sheath below the ion plasma frequency. It arises in ion-rich sheaths with low electron supply, which is the case for low secondary emission yields. Sheath oscillations modulate the discharge current creating oscillating magnetic fields. The second instability is current-driven ion sound turbulence due to counter-streaming electrons and ions. The fluctuations have a broad spectrum and short correlation lengths in all directions. The third type of fluctuations is spiky potential and current oscillations in high density discharges. These appear to be due to unstable emission properties of the magnetron cathode.

  10. Infinite volume limit for the dipole gas

    E-Print Network [OSTI]

    J. Dimock

    2009-04-28T23:59:59.000Z

    We consider a classical dipole gas in with low activity and show that the pressure has a limit as the volume goes to infinity. The result is obtained by a renormalization group analysis of the model.

  11. PERFORMANCE OF DIPOLE MAGNETS IN HELIUM II

    E-Print Network [OSTI]

    Althaus, R.

    2010-01-01T23:59:59.000Z

    in Pressurized Superfluid Helium", EX5 40 11th InternationalOF DIPOLE MAGNETS IN HELIUM II R. Althaus, S. Cacpi, W.S.OF DIMLE NMMETS IN HELIUM II* R. Althaus, S. Caspl, W.S.

  12. Axion Induced Oscillating Electric Dipole Moments

    E-Print Network [OSTI]

    Christopher T. Hill

    2015-04-10T23:59:59.000Z

    The axion electromagnetic anomaly induces an oscillating electric dipole for {\\em any} static magnetic dipole. Static electric dipoles do not produce oscillating magnetic moments. This is a low energy theorem which is a consequence of the space-time dependent cosmic background field of the axion in the limit that it is only locally time dependent $(\\overrightarrow{\\beta}=0)$. The electron will acquire an oscillating electric dipole of frequency $m_a$ and strength $\\sim 10^{-32}$ e-cm, three orders of magnitude above the nucleon, and within four orders of magnitude of the present standard model DC limit. This may suggest sensitive new experimental venues for the axion dark matter search.

  13. Design of A Conduction-cooled 4T Superconducting Racetrack for Multi-field Coupling Measurement System

    E-Print Network [OSTI]

    Chen, Yuquan; Wu, Wei; Guan, Mingzhi; Wu, Beimin; Mei, Enming; Xin, Canjie

    2015-01-01T23:59:59.000Z

    A conduction-cooled superconducting magnet producing a transverse field of 4 Tesla has been designed for the new generation multi-field coupling measurement system, which was used to study the mechanical behavior of superconducting samples at cryogenic temperature and intense magnetic fields. Considering experimental costs and coordinating with system of strain measurements by contactless signals (nonlinear CCD optics system), the racetrack type for the coil winding was chosen in our design, and a compact cryostat with a two-stage GM cryocooler was designed and manufactured for the superconducting magnet. The magnet was composed of a pair of flat racetrack coils wound by NbTi/Cu superconducting composite wires, a copper and stainless steel combinational form and two Bi2Sr2CaCu2Oy superconducting current leads. All the coils were connected in series and can be powered with a single power supply. The maximum central magnetic field is 4 T. In order to support the high stress and uniform thermal distribution in t...

  14. Dipole Bands in {sup 196}Hg

    SciTech Connect (OSTI)

    Lawrie, J. J.; Lawrie, E. A.; Newman, R. T.; Sharpey-Schafer, J. F.; Smit, F. D. [iThemba LABS, PO Box 722, Somerset West 7129 (South Africa); Msezane, B. [iThemba LABS, PO Box 722, Somerset West 7129 (South Africa); Physics Department, University of Zululand, Private Bag X1001, Kwadlangezwa 3886 (South Africa); Benatar, M.; Mabala, G. K.; Mutshena, K. P. [iThemba LABS, PO Box 722, Somerset West 7129 (South Africa); Physics Department, University of Cape Town, Rondebosch 7700 (South Africa); Federke, M.; Mullins, S. M. [Physics Department, University of Cape Town, Rondebosch 7700 (South Africa); Ncapayi, N. J.; Vymers, P. [iThemba LABS, PO Box 722, Somerset West 7129 (South Africa); Physics Department, University of the Western Cape, Private Bag X17, Belleville 7535 (South Africa)

    2011-10-28T23:59:59.000Z

    High spin states in {sup 196}Hg have been populated in the {sup 198}Pt({alpha},6n) reaction at 65 MeV and the level scheme has been extended. A new dipole band has been observed and a previously observed dipole has been confirmed. Excitation energies, spins and parities of these bands were determined from DCO ratio and linear polarization measurements. Possible quasiparticle excitations responsible for these structures are discussed.

  15. Superconducting Magnets for Particle Accelerators

    E-Print Network [OSTI]

    Rossi, L

    2012-01-01T23:59:59.000Z

    Superconductivity has been the most influential technology in the field of accelerators in the last 30 years. Since the commissioning of the Tevatron, which demonstrated the use and operability of superconductivity on a large scale, superconducting magnets and rf cavities have been at the heart of all new large accelerators. Superconducting magnets have been the invariable choice for large colliders, as well as cyclotrons and large synchrotrons. In spite of the long history of success, superconductivity remains a difficult technology, requires adequate R&D and suitable preparation, and has a relatively high cost. Hence, it is not surprising that the development has also been marked by a few setbacks. This article is a review of the main superconducting accelerator magnet projects; it highlights the main characteristics and main achievements, and gives a perspective on the development of superconducting magnets for the future generation of very high energy colliders.

  16. SUPERCONDUCTIVITY PROGRAM RESEARCH AND DEVELOPMENT High Temperature Superconductivity (HTS) is a technology with the potential

    E-Print Network [OSTI]

    #12;SUPERCONDUCTIVITY PROGRAM RESEARCH AND DEVELOPMENT High Temperature Superconductivity (HTS-of-way. The Department of Energy's efforts to advance High Temperature Superconductivity combine major national strengths: the Superconductivity Partnership Initiative (SPI), the 2nd Generation Wire Initiative

  17. Superconducting thermoelectric generator

    DOE Patents [OSTI]

    Metzger, J.D.; El-Genk, M.S.

    1994-01-01T23:59:59.000Z

    Thermoelectricity is produced by applying a temperature differential to dissimilar electrically conducting or semiconducting materials, thereby producing a voltage that is proportional to the temperature difference. Thermoelectric generators use this effect to directly convert heat into electricity; however, presently-known generators have low efficiencies due to the production of high currents which in turn cause large resistive heating losses. Some thermoelectric generators operate at efficiencies between 4% and 7% in the 800{degrees} to 1200{degrees}C range. According to its major aspects and bradly stated, the present invention is an apparatus and method for producing electricity from heat. In particular, the invention is a thermoelectric generator that juxtaposes a superconducting material and a semiconducting material - so that the superconducting and the semiconducting materials touch - to convert heat energy into electrical energy without resistive losses in the temperature range below the critical temperature of the superconducting material. Preferably, an array of superconducting material is encased in one of several possible configurations within a second material having a high thermal conductivity, preferably a semiconductor, to form a thermoelectric generator.

  18. Competition between Superconductivity

    E-Print Network [OSTI]

    Fominov, Yakov

    . Liu, D.V. Haviland, B. Nease, and A.M. Goldman, PRB 47, 5931 (1993)S I Bi films Rc = 6.45 k } M ? 0.M. Goldman, PRB 47, 5931 (1993) } M ? metal Drude conductivity + quantum corrections G ln T SMIT #12;Suppression of Superconductivity by Disorder MoxSi1-x films S. Okuma, T. Terashima, and Kokubo, PRB 58, 2816

  19. Langmuir vacuum and superconductivity

    SciTech Connect (OSTI)

    Veklenko, B. A. [Russian Academy of Sciences, Joint Institute for High Temperatures (Russian Federation)

    2012-06-15T23:59:59.000Z

    It is shown that, in the 'jelly' model of cold electron-ion plasma, the interaction between electrons and the quantum electromagnetic vacuum of Langmuir waves involves plasma superconductivity with an energy gap proportional to the energy of the Langmuir quantum.

  20. seshadri@mrl Superconductivity

    E-Print Network [OSTI]

    Akhmedov, Azer

    Superconducting magnets and MRI The rudiments of Bardeen-Cooper-Schrieffer theory High TC Newer systems #12 are they achieved: Cascaded refrigeration processes involving the successive compression and expansion of different?ng 273.15 32 0 Water boiling 373.15 212 100 Refrigeration in a nutshell: Compress a fluid isothermally

  1. 7 Tesla fMRI Reveals Systematic Functional Organization for Binocular Disparity in Dorsal Visual Cortex

    E-Print Network [OSTI]

    Goncalves, Nuno R.; Ban, Hiroshi; Sánchez-Panchuelo, Rosa M.; Francis, Susan T.; Schluppeck, Denis; Welchman, Andrew E.

    2015-02-18T23:59:59.000Z

    animal models, comparatively little is known about the local architecture of stereoscopic processing in the human brain. Here, we take advantage of the high spatial specificity and image contrast offered by 7 tesla fMRI to test for systematic organization...

  2. BUNCH COMPRESSOR II AT THE TESLA TEST FACILITY M. Geitz, A. Kabel

    E-Print Network [OSTI]

    BUNCH COMPRESSOR II AT THE TESLA TEST FACILITY M. Geitz, A. KabelŁ , G. Schmidt, H. Weise Deutsches the required peak current. The second stage of the bunch compression sys- tem, bunch compressor II, has been taken into operation recently. We describe design and instrumentation of the bunch compressor II

  3. Proton MR Spectroscopy at 7 Tesla in the Macaque monkey J. Pfeuffer1

    E-Print Network [OSTI]

    Jegelka, Stefanie

    Proton MR Spectroscopy at 7 Tesla in the Macaque monkey J. Pfeuffer1 , C. Juchem1 , H. Merkle2 , N was demonstrated to provide significant sensitivity and resolution gains at high magnetic field [1,2]. MR imaging. K. Logothetis1 1 Max Planck Institute for biological Cybernetics, Tuebingen, D, Germany, 2 LFMI, NIH

  4. Localized 1H MR Spectroscopy in the alert monkey at 7 Tesla J. Pfeuffer1

    E-Print Network [OSTI]

    Jegelka, Stefanie

    Localized 1H MR Spectroscopy in the alert monkey at 7 Tesla J. Pfeuffer1 , C. Juchem1 , H. Merkle2-voxel 1 H MRS in the alert monkey using a 7 T MR system with a vertical bore. Typically , N. K. Logothetis1 1 Department Physiology of Cognitive Processes, Max Planck Institute

  5. TESLA FEL 2004-06 Expected properties of the radiation from VUV-FEL at DESY

    E-Print Network [OSTI]

    TESLA FEL 2004-06 July 2004 Expected properties of the radiation from VUV-FEL at DESY (femtosecond pulse" (200 fs) mode of FEL operation at VUV- FEL, based on a linearized bunch compression that pro- duces FEL radiation. Such a mode of operation was successfully tested at VUV-FEL, Phase I

  6. TESLA-FEL Report 2004-08 LINAC BASED FREE-ELECTRON LASER

    E-Print Network [OSTI]

    TESLA-FEL Report 2004-08 1 LINAC BASED FREE-ELECTRON LASER J. Rossbach Universität Hamburg, Hamburg, Germany Abstract A basic treatment of the principle of the linac-driven free-electron laser (FEL) is given. The first part of the paper describes the FEL in low-gain approximation, and in the second part the high

  7. TESLA-FEL 2004-01 Silica Aerogel Radiators for Bunch Length

    E-Print Network [OSTI]

    TESLA-FEL 2004-01 Silica Aerogel Radiators for Bunch Length Measurements J. Bšahr a , V. Djordjadze aerogel are used to measure the electron bunch length at the photo injector test facility at DESY Zeuthen by the usage of aerogel is calculated analytically and Monte Carlo simulations are performed. It is shown

  8. Capacitive Stress Gauges in Model Dipole Magnets

    E-Print Network [OSTI]

    Ragland, R. Blake

    2009-06-09T23:59:59.000Z

    Capacitive transducers are used to measure mechanical stress in the windings of superconducting magnets. The transducer consists of a bonded laminate of alternating thin foils of stainless steel and high-strength polymer (polyimide). The thin...

  9. Controllable microwave three-wave mixing via a single three-level superconducting quantum circuit

    E-Print Network [OSTI]

    Yu-xi Liu; Hui-Chen Sun; Z. H. Peng; Adam Miranowicz; J. S. Tsai; Franco Nori

    2014-12-21T23:59:59.000Z

    Three-wave mixing in second-order nonlinear optical processes cannot occur in atomic systems due to the electric-dipole selection rules. In contrast, we demonstrate that second-order nonlinear processes can occur in a superconducting quantum circuit (i.e., a superconducting artificial atom) when the inversion symmetry of the potential energy is broken by simply changing the applied magnetic flux. In particular, we show that difference- and sum-frequencies (and second harmonics) can be generated in the microwave regime in a controllable manner by using a single three-level superconducting flux quantum circuit (SFQC). For our proposed parameters, the frequency tunability of this circuit can be achieved in the range of about 17 GHz for the sum-frequency generation, and around 42 GHz (or 26 GHz) for the difference-frequency generation. Our proposal provides a simple method to generate second-order nonlinear processes within current experimental parameters of SFQCs.

  10. Dipole-dipole broadening of Rb ns-np microwave transitions

    SciTech Connect (OSTI)

    Park, Hyunwook; Tanner, P. J.; Claessens, B. J.; Shuman, E. S.; Gallagher, T. F. [Department of Physics, University of Virginia, Charlottesville, Virginia 22904-0714 (United States)

    2011-08-15T23:59:59.000Z

    The dipole-dipole broadening of ns-np microwave transitions of cold Rb Rydberg atoms in a magneto-optical trap has been recorded for 28{<=}n{<=}51. Since the electric dipole transition matrix elements scale as n{sup 2}, a broadening rate scaling as n{sup 4} is expected and a broadening rate of 8.2x10{sup -15}n{sup 4} MHz cm{sup 3} is observed. The observed broadening is smaller than expected from a classical picture due to the spin-orbit interaction in the np atoms. The broadened resonances are asymmetric and cusp shaped, and their line shapes can be reproduced by a diatomic model which takes into account the dipole-dipole interaction, including the spin-orbit interaction, the strengths of the allowed microwave transitions, and the distribution of the atomic spacings in the trap.

  11. Superconducting vortex pinning with artificially prepared nanostructures

    E-Print Network [OSTI]

    Rosen, Yaniv Jacob

    E. Dubin, Physica C: Superconductivity 369, 21 (2002). R. D.P. G. De Gennes, Superconductivity of Metals and Alloys (W.Schuller, Journal of Superconductivity and Novel Magnetism

  12. Superconductivity: the Gift that Keeps on Giving

    E-Print Network [OSTI]

    Goldberg, Bennett

    Superconductivity: the Gift that Keeps on Giving Superconductivity, first discovered recently the discovery of high superconducting transition temperatures in the ceramic copper oxides has superconductors. In the underdoped or pseudogap phase of the cuprate superconductors, a significant portion

  13. Superconducting ``metals'' and ``insulators'' Smitha Vishveshwara

    E-Print Network [OSTI]

    Superconducting ``metals'' and ``insulators'' Smitha Vishveshwara Department of Physics, University to the distinction between normal metals and insulators: the superconducting ``metal'' with delocalized qua- siparticle excitations and the superconducting ``insulator'' with localized quasiparticles. We describe

  14. Superconducting solenoids for the Muon collider

    E-Print Network [OSTI]

    Green, M.A.

    2011-01-01T23:59:59.000Z

    muon collider has superconducting solenoids as an integralLBNL-44303 SCMAG-690 Superconducting Solenoids for the MuonDE-AC03-76SFOOO98. J Superconducting Solenoids for the Muon

  15. SUPERCONDUCTING SHIELDING By W. O. HAMILTON,

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    41. SUPERCONDUCTING SHIELDING By W. O. HAMILTON, Stanford University, Department of Physics, Stanford, California (U.S.A.). Abstract. 2014 Superconducting shields offer the possibility of obtaining shielding from external time varying fields. Various techniques of superconducting shielding

  16. HIGH-FIELD SUPERCONDUCTING ACCELERATOR MAGNETS

    E-Print Network [OSTI]

    Taylor, C.

    2011-01-01T23:59:59.000Z

    D. C. 'Niobium-Titanium Superconducting Material s ', in S.14, 1982 HIGH-FIELD SUPERCONDUCTING ACCELERATOR MAGNETS C.SUMAG-68 HIGH-FIELD SUPERCONDUCTING ACCELERATOR MAGNETS* C.

  17. Superconductivity in graphite intercalation compounds

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

    Smith, Robert P. [Univ. of Cambridge (United Kingdom); Dean, Mark P. M. [Brookhaven National Lab. (BNL), Upton, NY (United States); Weller, Thomas E. [Univ. College of London (United Kingdom); Howard, Christopher A. [Univ. College of London (United Kingdom); Rahnejat, Kaveh C. [Univ. College of London (United Kingdom); Saxena, Siddharth S. [Univ. of Cambridge (United Kingdom); Ellerby, Mark [Univ. College of London (United Kingdom)

    2015-07-01T23:59:59.000Z

    The field of superconductivity in the class of materials known as graphite intercalation compounds has a history dating back to the 1960s This paper recontextualizes the field in light of the discovery of superconductivity in CaC? and YbC? in 2005. In what follows, we outline the crystal structure and electronic structure of these and related compounds. We go on to experiments addressing the superconducting energy gap, lattice dynamics, pressure dependence, and how this relates to theoretical studies. The bulk of the evidence strongly supports a BCS superconducting state. However, important questions remain regarding which electronic states and phonon modes are most important for superconductivity and whether current theoretical techniques can fully describe the dependence of the superconducting transition temperature on pressure and chemical composition.

  18. Superconductivity in graphite intercalation compounds

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

    Smith, Robert P.; Dean, Mark P. M.; Weller, Thomas E.; Howard, Christopher A.; Rahnejat, Kaveh C.; Saxena, Siddharth S.; Ellerby, Mark

    2015-07-01T23:59:59.000Z

    The field of superconductivity in the class of materials known as graphite intercalation compounds has a history dating back to the 1960s This paper recontextualizes the field in light of the discovery of superconductivity in CaC? and YbC? in 2005. In what follows, we outline the crystal structure and electronic structure of these and related compounds. We go on to experiments addressing the superconducting energy gap, lattice dynamics, pressure dependence, and how this relates to theoretical studies. The bulk of the evidence strongly supports a BCS superconducting state. However, important questions remain regarding which electronic states and phonon modes aremore »most important for superconductivity and whether current theoretical techniques can fully describe the dependence of the superconducting transition temperature on pressure and chemical composition.« less

  19. Cryogenic techniques for large superconducting magnets in space

    SciTech Connect (OSTI)

    Green, M.A.

    1988-12-01T23:59:59.000Z

    A large superconducting magnet is proposed for use in a particle astrophysics experiment, ASTROMAG, which is to be mounted on the United States Space Station. This experiment will have a two-coil superconducting magnet with coils which are 1.3 to 1.7 meters in diameter. The two-coil magnet will have zero net magnetic dipole moment. The field 15 meters from the magnet will approach earth's field in low earth orbit. The issue of high Tc superconductor will be discussed in the paper. The reasons for using conventional niobium-titanium superconductor cooled with superfluid helium will be presented. Since the purpose of the magnet is to do particle astrophysics, the superconducting coils must be located close to the charged particle detectors. The trade off between the particle physics possible and the cryogenic insulation around the coils is discussed. As a result, the ASTROMAG magnet coils will be operated outside of the superfluid helium storage tank. The fountain effect pumping system which will be used to cool the coil is described in the report. Two methods for extending the operating life of the superfluid helium dewar are discussed. These include: operation with a third shield cooled to 90 K with a sterling cycle cryocooler, and a hybrid cryogenic system where there are three hydrogen-cooled shields and cryostat support heat intercept points. Both of these methods will extend the ASTROMAG cryogenic operating life from 2 years to almost 4 years. 14 refs., 8 figs., 4 tabs.

  20. Landscape of superconducting membranes

    E-Print Network [OSTI]

    Frederik Denef; Sean A. Hartnoll

    2009-03-20T23:59:59.000Z

    The AdS/CFT correspondence may connect the landscape of string vacua and the `atomic landscape' of condensed matter physics. We study the stability of a landscape of IR fixed points of N=2 large N gauge theories in 2+1 dimensions, dual to Sasaki-Einstein compactifications of M theory, towards a superconducting state. By exhibiting instabilities of charged black holes in these compactifications, we show that many of these theories have charged operators that condense when the theory is placed at a finite chemical potential. We compute a statistical distribution of critical superconducting temperatures for a subset of these theories. With a chemical potential of one milliVolt, we find critical temperatures ranging between 0.24 and 165 degrees Kelvin.

  1. Pursuit and Synchronization in Hydrodynamic Dipoles

    E-Print Network [OSTI]

    Kanso, Eva

    2015-01-01T23:59:59.000Z

    We study theoretically the behavior of a class of hydrodynamic dipoles. This study is motivated by recent experiments on synthetic and biological swimmers in microfluidic \\textit{Hele-Shaw} type geometries. Under such confinement, a swimmer's hydrodynamic signature is that of a potential source dipole, and the long-range interactions among swimmers are obtained from the superposition of dipole singularities. Here, we recall the equations governing the positions and orientations of interacting asymmetric swimmers in doubly-periodic domains, and focus on the dynamics of swimmer pairs. We obtain two families of `relative equilibria'-type solutions that correspond to pursuit and synchronization of the two swimmers, respectively. Interestingly, the pursuit mode is stable for large tail swimmers whereas the synchronization mode is stable for large head swimmers. These results have profound implications on the collective behavior reported in several recent studies on populations of confined microswimmers.

  2. Theory of Dipole Induced Electromagnetic Transparency

    E-Print Network [OSTI]

    Puthumpally-Joseph, Raiju; Sukharev, Maxim; Charron, Eric

    2015-01-01T23:59:59.000Z

    A detailed theory describing linear optics of vapors comprised of interacting multi-level quantum emitters is proposed. It is shown both by direct integration of Maxwell-Bloch equations and using a simple analytical model that at large densities narrow transparency windows appear in otherwise completely opaque spectra. The existence of such windows is attributed to overlapping resonances. This effect, first introduced for three-level systems in [R. Puthumpally-Joseph, M. Sukharev, O. Atabek and E. Charron, Phys. Rev. Lett. 113, 163603 (2014)], is due to strongly enhanced dipole-dipole interactions at high emitters' densities. The presented theory extends this effect to the case of multilevel systems. The theory is applied to the D1 transitions of interacting Rb-85 atoms. It is shown that at high atomic densities, Rb-85 atoms can behave as three-level emitters exhibiting all the properties of dipole induced electromagnetic transparency. Applications including slow light and laser pulse shaping are also propose...

  3. Competition between singlet and triplet superconductivity

    E-Print Network [OSTI]

    Tian De Cao; Tie Bang Wang

    2009-10-04T23:59:59.000Z

    The competition between singlet and triplet superconductivity is examined in consideration of correlations on an extended Hubbard model. It is shown that the triplet superconductivity may not be included in the common Hubbard model since the strong correlation favors the singlet superconductivity, and thus the triplet superconductivity should be induced by the electron-phonon interaction and the ferromagnetic exchange interaction. We also present a superconducting qualification with which magnetism is unbeneficial to superconductivity.

  4. Equilibrium Distributions and Superconductivity

    E-Print Network [OSTI]

    Ashot Vagharshakyan

    2011-06-07T23:59:59.000Z

    In this article two models for charges distributions are discussed. On the basis of our consideration we put different points of view for stationary state. We prove that only finite energy model for charges' distribution and well-known variation principle explain some well-known experimental results. A new model for superconductivity was suggested, too. In frame of that model some characteristic experimental results for superconductors is possible to explain.

  5. Superconducting magnet wire

    DOE Patents [OSTI]

    Schuller, Ivan K. (Woodridge, IL); Ketterson, John B. (Evanston, IL); Banerjee, Indrajit (San Jose, CA)

    1986-01-01T23:59:59.000Z

    A superconducting tape or wire with an improved critical field is formed of alternating layers of a niobium-containing superconductor such as Nb, NbTi, Nb.sub.3 Sn or Nb.sub.3 Ge with a thickness in the range of about 0.5-1.5 times its coherence length, supported and separated by layers of copper with each copper layer having a thickness in the range of about 170-600 .ANG..

  6. Helical superconducting black holes

    E-Print Network [OSTI]

    Aristomenis Donos; Jerome P. Gauntlett

    2012-05-17T23:59:59.000Z

    We construct novel static, asymptotically $AdS_5$ black hole solutions with Bianchi VII$_0$ symmetry that are holographically dual to superconducting phases in four spacetime dimensions with a helical p-wave order. We calculate the precise temperature dependence of the pitch of the helical order. At zero temperature the black holes have vanishing entropy and approach domain wall solutions that reveal homogenous, non-isotropic dual ground states with emergent scaling symmetry.

  7. Superconducting VAR control. [Patent application

    DOE Patents [OSTI]

    Boenig, H.J.; Hassenzahl, W.V.

    1980-12-05T23:59:59.000Z

    Static VAR control means are described employing an asymmetrically controlled Graetz bridge and a superconducting direct current coil having low losses and low cost characteristics.

  8. Superconducting electric power applications

    SciTech Connect (OSTI)

    Blaugher, R.D. [National Renewable Energy Lab., Golden, CO (United States)

    1997-06-01T23:59:59.000Z

    The application of superconductors to electric power systems has been actively pursued over the past 30 years. Following the realization of high-field, high-current superconductors in 1961, researchers applied these type II materials, such as Nb-Ti and Nb{sub 3}Sn, to laboratory magnets, followed by generators, motors, and transmission cables. Successful prototypes for the latter were constructed and tested by the mid-1980s. It is fair to assume that widespread utility acceptance of these low-temperature superconducting (LTS) power applications was compromised by the necessity for liquid helium cooling. The discovery of the high-temperature superconductors (HTS) in 1986, which offered the prospect for liquid nitrogen cooling, provided renewed interest and impetus and spurred the development of HTS power components. The expectations for HTS power components are, in fact, near realization, as a result of the rapid worldwide progress in HTS wire and tape development. This paper will review the history and present status of superconducting power-system-related applications. The major problems facing this technology and the prospects for commercialization and eventual integration into the utility sector will be discussed. General acceptance for superconducting power equipment by the electric utilities and other end-users will ultimately be based on the respective system performance, efficiency, reliability and maintenance, operational lifetime, and installed cost compared to conventional technologies.

  9. Superconducting dark energy

    E-Print Network [OSTI]

    Shi-Dong Liang; Tiberiu Harko

    2015-04-10T23:59:59.000Z

    Based on the analogy with superconductor physics we consider a scalar-vector-tensor gravitational model, in which the dark energy action is described by a gauge invariant electromagnetic type functional. By assuming that the ground state of the dark energy is in a form of a condensate with the U(1) symmetry spontaneously broken, the gauge invariant electromagnetic dark energy can be described in terms of the combination of a vector and of a scalar field (corresponding to the Goldstone boson), respectively. The gravitational field equations are obtained by also assuming the possibility of a non-minimal coupling between the cosmological mass current and the superconducting dark energy. The cosmological implications of the dark energy model are investigated for a Friedmann-Robertson-Walker homogeneous and isotropic geometry for two particular choices of the electromagnetic type potential, corresponding to a pure electric type field, and to a pure magnetic field, respectively. The time evolution of the scale factor, matter energy density and deceleration parameter are obtained for both cases, and it is shown that in the presence of the superconducting dark energy the Universe ends its evolution in an exponentially accelerating vacuum de Sitter state. By using the formalism of the irreversible thermodynamic processes for open systems we interpret the generalized conservation equations in the superconducting dark energy model as describing matter creation. The particle production rates, the creation pressure and the entropy evolution are explicitly obtained.

  10. Superconductivity and Superfluidity

    E-Print Network [OSTI]

    B. V. Vasiliev

    2013-10-31T23:59:59.000Z

    Currently there is a common belief that the explanation of superconductivity phenomenon lies in understanding the mechanism of the formation of electron pairs. Paired electrons, however, cannot form a superconducting condensate spontaneously. These paired electrons perform disorderly zero-point oscillations and there are no force of attraction in their ensemble. In order to create a unified ensemble of particles, the pairs must order their zero-point fluctuations so that an attraction between the particles appears. As a result of this ordering of zero-point oscillations in the electron gas, superconductivity arises. This model of condensation of zero-point oscillations creates the possibility of being able to obtain estimates for the critical parameters of elementary superconductors, which are in satisfactory agreement with the measured data. On the another hand, the phenomenon of superfluidity in He-4 and He-3 can be similarly explained, due to the ordering of zero-point fluctuations. It is therefore established that both related phenomena are based on the same physical mechanism.

  11. Flavor Superconductivity & Superfluidity

    E-Print Network [OSTI]

    Matthias Kaminski

    2010-02-25T23:59:59.000Z

    In these lecture notes we derive a generic holographic string theory realization of a p-wave superconductor and superfluid. For this purpose we also review basic D-brane physics, gauge/gravity methods at finite temperature, key concepts of superconductivity and recent progress in distinct realizations of holographic superconductors and superfluids. Then we focus on a D3/D7-brane construction yielding a superconducting or superfluid vector-condensate. The corresponding gauge theory is 3+1-dimensional N=2 supersymmetric Yang-Mills theory with SU(N) color and SU(2) flavor symmetry. It shows a second order phase transition to a phase in which a U(1) subgroup of the SU(2) symmetry is spontaneously broken and typical superconductivity signatures emerge, such as a conductivity (pseudo-)gap and the Meissner-Ochsenfeld effect. Condensates of this nature are comparable to those recently found experimentally in p-wave superconductors such as a ruthenate compound. A string picture of the pairing mechanism and condensation is given using the exact knowledge of the corresponding field theory degrees of freedom.

  12. Comparison of electromagnetic, thermal and mechanical calculations with rf test results in rf-dipole deflecting/crabbing cavities

    SciTech Connect (OSTI)

    Park, HyeKyoung [JLAB, ODU; De Silva, Subashini U. [ODU; Delayen, Jean R. [ODU, JLAB

    2013-12-01T23:59:59.000Z

    The current requirements of higher gradients and strict dimensional constraints in the emerging applications have required the designing of compact deflecting and crabbing rf structures. The superconducting rf-dipole cavity is one of the first novel compact designs with attractive properties such as higher gradients, higher shunt impedance and widely separated higher order modes. The recent tests performed on proof-of-principle designs of the rf-dipole geometry at 4.2 K and 2.0 K in the vertical test area at Jefferson Lab have proven the designs to achieve higher gradients with higher intrinsic quality factors and easily processed multipacting conditions. The cavity characteristics, such as pressure sensitivity and Lorentz force detuning, were studied using ANSYS before the fabrication. These characteristics were measured during the cavity test. The comparison between the simulation and the measurement provides insight how the simulation can be used for design and fabrication of future cavities.

  13. Test Results of HD2, A High Field Nb3Sn Dipole with A 36 MM Bore

    SciTech Connect (OSTI)

    Ferracin, Paolo

    2008-05-19T23:59:59.000Z

    The Superconducting Magnet Program at Lawrence Berkeley National Laboratory (LBNL) has developed the 1 m long Nb{sub 3}Sn dipole magnet HD2. With tilted (flared) ends to avoid obstructing a 36 mm clear bore, HD2 represents a step towards the use of block-type coils in high-field accelerator magnets. The coil design has been optimized to minimize geometric harmonics and reduce the conductor peak field in the end region, resulting in an expected short sample dipole field of 15 T. The support structure is composed by an external aluminum shell pre-tensioned with pressurized bladders and interference keys, and by two stainless steel end plates compressing the coil ends through four aluminum axial rods. We report on magnet design, assembly, and test results, including training performance, quench locations, and strain gauge measurements.

  14. Real Compton Scattering via Color Dipoles

    E-Print Network [OSTI]

    B. Z. Kopeliovich; Ivan Schmidt; M. Siddikov

    2009-08-24T23:59:59.000Z

    We study photoabsorption reaction and real Compton scattering (RCS) within the color dipole model. We rely on a photon wave function derived in the instanton vacuum model, and on the energy dependent phenomenological elastic dipole amplitude. Data for the photoabsorption cross section at high energies agree with our parameter free calculations. We also provide predictions for the differential RCS cross section. Although no data for small angle Compton scattering are available so far, this process can be measured in ultra-peripheral hadronic and nuclear collisions at the LHC.

  15. High-Temperature Superconducting Composite Conductors

    DOE Patents [OSTI]

    Holesinger, Terry G. (Los Alamos, NM); Foltyn, Stephen R. (Los Alamos, NM); Arendt, Paul N. (Los Alamos, NM); Groves, James R. (Los Alamos, NM); Jia, Quanxi (Los Alamos, NM); Ayala, Alicia (Santa Fe, NM)

    2005-01-18T23:59:59.000Z

    Copper or excess copper is added to one or more layers of a superconducting composite structure to reduce migration of copper form a copper based superconducting layer.

  16. Surface Superconductivity in Niobium for Superconducting RF Cavities0

    E-Print Network [OSTI]

    Surface Superconductivity in Niobium for Superconducting RF Cavities0 S. Casalbuoni1,2 , E) parameters of the ultrapure niobium used for the fabrication of the nine-cell 1.3 GHz cavities for the lin.3 GHz nine-cell cavities which are made from pure niobium and cooled by superfluid helium at 2 K. The 0

  17. Optimization of superconducting tiling pattern for superconducting bearings

    DOE Patents [OSTI]

    Hull, J.R.

    1996-09-17T23:59:59.000Z

    An apparatus and method for reducing magnetic field inhomogeneities which produce rotational loss mechanisms in high temperature superconducting magnetic bearings are disclosed. Magnetic field inhomogeneities are reduced by dividing high temperature superconducting structures into smaller structures, and arranging the smaller structures into tiers which stagger the magnetic field maximum locations of the smaller structures. 20 figs.

  18. Optimization of superconducting tiling pattern for superconducting bearings

    DOE Patents [OSTI]

    Hull, John R. (Hinsdale, IL)

    1996-01-01T23:59:59.000Z

    An apparatus and method for reducing magnetic field inhomogeneities which produce rotational loss mechanisms in high temperature superconducting magnetic bearings. Magnetic field inhomogeneities are reduced by dividing high temperature superconducting structures into smaller structures, and arranging the smaller structures into tiers which stagger the magnetic field maximum locations of the smaller structures.

  19. The Pygmy Dipole Resonance status and new experimental developments

    E-Print Network [OSTI]

    Zilges, Andreas

    Dipole Resonance (GDR) Phys. Rev. 71 (1947) 3 1947: Photo-Fission in Uranium #12;Giant Dipole Resonance radius · Slope of symmetry energy in EoS · Impact on nucleosynthesis S. Goriely, PLB 436 (1998) 10 E

  20. Floating coil position detection system for the Levitated Dipole Experiment

    E-Print Network [OSTI]

    Roach, Austin Hayes

    2005-01-01T23:59:59.000Z

    The Levitated Dipole Experiment (LDX) is a joint Columbia University/MIT research collaboration sited at MIT's Plasma Science and Fusion Center. LDX is investigating the physics of a plasma confined in a dipole magnetic ...

  1. Studies of the superconducting traveling wave cavity for high gradient LINAC

    E-Print Network [OSTI]

    Avrakhov, Pavel; Kanareykin, Alexei; Solyak, Nikolay; Yakovlev, Vyacheslav P

    2015-01-01T23:59:59.000Z

    Use of a traveling wave (TW) accelerating structure with a small phase advance per cell instead of standing wave may provide a significant increase of accelerating gradient in a superconducting linear accelerator. The TW section achieves an accelerating gradient 1.2-1.4 larger than TESLA-shaped standing wave cavities for the same surface electric and magnetic fields. Recent tests of an L-band single-cell cavity with a waveguide feedback demonstrated an accelerating gradient comparable to the gradient in a single-cell ILC-type cavity from the same manufacturer. This article presents the next stage of the 3- cell TW resonance ring development which will be tested in the traveling wave regime. The main simulation results of the microphonics and Lorentz Force Detuning (LFD) are also considered.

  2. Method of constructing a superconducting magnet

    DOE Patents [OSTI]

    Satti, John A. (Naperville, IL)

    1981-01-01T23:59:59.000Z

    A superconducting magnet designed to produce magnetic flux densities of the order of 4 to 5 Webers per square meter is constructed by first forming a cable of a plurality of matrixed superconductor wires with each wire of the plurality insulated from each other one. The cable is shaped into a rectangular cross-section and is wound with tape in an open spiral to create cooling channels. Coils are wound in a calculated pattern in saddle shapes to produce desired fields, such as dipoles, quadrupoles, and the like. Wedges are inserted between adjacent cables as needed to maintain substantially radial placement of the long dimensions of cross sections of the cables. After winding, individual strands in each of the cables are brought out to terminals and are interconnected to place all of the strands in series and to maximize the propagation of a quench by alternating conduction from an inner layer to an outer layer and from top half to bottom half as often as possible. Individual layers are separated from others by spiraled aluminum spacers to facilitate cooling. The wound coil is wrapped with an epoxy tape that is cured by heat and then machined to an interference fit with an outer aluminum pipe which is then affixed securely to the assembled coil by heating it to make a shrink fit. In an alternate embodiment, one wire of the cable is made of copper or the like to be heated externally to propagate a quench.

  3. Gravitational Radiation from Oscillating Gravitational Dipole

    E-Print Network [OSTI]

    Fran De Aquino

    2002-10-05T23:59:59.000Z

    The concept of Gravitational Dipole is introduced starting from the recent discovery of negative gravitational mass (gr-qc/0005107 and physics/0205089). A simple experiment, a gravitational wave transmitter, to test this new concept of gravitational radiation source is presented.

  4. Colour dipoles and deeply virtual Compton scattering

    E-Print Network [OSTI]

    R. Sandapen

    2002-07-01T23:59:59.000Z

    I report on an analysis of Deeply Virtual Compton Scattering (DVCS) within the dipole model, done in collaboration with M. McDermott and G. Shaw. The two models considered here are distinct in their structure and implications. They both agree with the available cross-section data on DVCS from HERA. Predictions for various asymmetries are also given.

  5. Dipole nano-laser: Theory and properties

    SciTech Connect (OSTI)

    Ghannam, T., E-mail: gtalal@hotmail.com [King Abdullah Institute for Nano-Technology, King Saud University, PO Box 2454, Riyadh 11451 (Saudi Arabia)

    2014-03-31T23:59:59.000Z

    In this paper we outline the main quantum properties of the system of nano-based laser called Dipole Nano-Laser emphasizing mainly on its ability to produce coherent light and for different configurations such as different embedding materials and subjecting it to an external classical electric field.

  6. Giant Skyrmions Stabilized by Dipole-Dipole Interactions in Thin Ferromagnetic Films

    E-Print Network [OSTI]

    Ezawa, Motohiko

    2011-01-01T23:59:59.000Z

    Motivated by a recent magnetization reversal experiment on a TbFeCo thin film, we study a topological excitation in the anisotropic nonlinear sigma model together with the Zeeman and magnetic dipole-dipole interactions. Dipole-dipole interactions turn a ferromagnet into a frustrated spin system, which allows a nontrivial spin texture such as a giant skyrmion. We derive an analytic formula for the skyrmion radius. The radius is controllable by the external magnetic field. It is intriguing that a skyrmion may have already been observed as a magnetic domain. A salient feature is that a single skyrmion can be created or destroyed experimentally. An analysis is made also on skyrmions in chiral magnets.

  7. Giant Skyrmions Stabilized by Dipole-Dipole Interactions in Thin Ferromagnetic Films

    SciTech Connect (OSTI)

    Ezawa, Motohiko [Department of Applied Physics, University of Tokyo, Hongo 7-3-1, 113-8656 (Japan)

    2010-11-05T23:59:59.000Z

    Motivated by a recent magnetization reversal experiment on a TbFeCo thin film, we study a topological excitation in the anisotropic nonlinear sigma model together with the Zeeman and magnetic dipole-dipole interactions. Dipole-dipole interactions turn a ferromagnet into a frustrated spin system, which allows a nontrivial spin texture such as a giant Skyrmion. We derive an analytic formula for the Skyrmion radius. The radius is controllable by the external magnetic field. It is intriguing that a Skyrmion may have already been observed as a magnetic domain. A salient feature is that a single Skyrmion can be created or destroyed experimentally. An analysis is made also on Skyrmions in chiral magnets.

  8. Giant Skyrmions Stabilized by Dipole-Dipole Interactions in Thin Ferromagnetic Films

    E-Print Network [OSTI]

    Motohiko Ezawa

    2010-11-03T23:59:59.000Z

    Motivated by a recent magnetization reversal experiment on a TbFeCo thin film, we study a topological excitation in the anisotropic nonlinear sigma model together with the Zeeman and magnetic dipole-dipole interactions. Dipole-dipole interactions turn a ferromagnet into a frustrated spin system, which allows a nontrivial spin texture such as a giant skyrmion. We derive an analytic formula for the skyrmion radius. The radius is controllable by the external magnetic field. It is intriguing that a skyrmion may have already been observed as a magnetic domain. A salient feature is that a single skyrmion can be created or destroyed experimentally. An analysis is made also on skyrmions in chiral magnets.

  9. Power superconducting power transmission cable

    DOE Patents [OSTI]

    Ashworth, Stephen P. (Cambridge, GB)

    2003-01-01T23:59:59.000Z

    The present invention is for a compact superconducting power transmission cable operating at distribution level voltages. The superconducting cable is a conductor with a number of tapes assembled into a subconductor. These conductors are then mounted co-planarly in an elongated dielectric to produce a 3-phase cable. The arrangement increases the magnetic field parallel to the tapes thereby reducing ac losses.

  10. High critical current superconducting tapes

    DOE Patents [OSTI]

    Holesinger, Terry G. (Los Alamos, NM); Jia, Quanxi (Los Alamos, NM); Foltyn, Stephen R. (Los Alamos, NM)

    2003-09-23T23:59:59.000Z

    Improvements in critical current capacity for superconducting film structures are disclosed and include the use of a superconducting RE-BCO layer including a mixture of rare earth metals, e.g., yttrium and europium, where the ratio of yttrium to europium in the RE-BCO layer ranges from about 3 to 1 to from about 1.5 to 1.

  11. EXPERIMENT E951 POWER SUPPLY TO PULSE A 14.5 TESLA SOLENOID MAGNET

    E-Print Network [OSTI]

    McDonald, Kirk

    .1 15.2 Cases 2 and 3 require the same power supply, but differ in the magnet cooling scheme. #12;0 4 8EXPERIMENT E951 POWER SUPPLY TO PULSE A 14.5 TESLA SOLENOID MAGNET IOANNIS MARNERIS BOOSTER supply. #12;0 4 8 12 16 20 24 28 32 36 40 0 2 4 6 8 10 -500 -400 -300 -200 -100 0 100 200 300 400 500

  12. TESLA-FEL 2004-05 The Potential for Extending the Spectral

    E-Print Network [OSTI]

    TESLA-FEL 2004-05 The Potential for Extending the Spectral Range Accessible to the European X electron beam energy of 17.5 GeV can be covered by operating the SASE FEL with three undulators which have. There are at least two possible sources of the VUV radiation associated with the X-ray FEL: the "low (2.5 GeV) energy

  13. TESLA-FEL 2006-04 Far-Infrared Transition and Diffraction Radiation

    E-Print Network [OSTI]

    TESLA-FEL 2006-04 Far-Infrared Transition and Diffraction Radiation Part II: The THz Beamline at the VUV-FEL Linac Sara Casalbuoni1 , Bernhard Schmidt1 , Peter Schmšuser1,2 , Bernd Steffen1,2 1 Deutsches-Electron Laser (VUV-FEL) at DESY has recently been up- graded to a maximum electron energy of 700 MeV, allowing

  14. Short cycle pulse sequence for dynamical decoupling of local fields and dipole-dipole interactions

    E-Print Network [OSTI]

    S. A. Moiseev; V. A. Skrebnev

    2014-12-11T23:59:59.000Z

    We propose a new pulse sequence for dynamical averaging of the dipole-dipole interactions and inhomogeneities of the magnetic fields in the nuclear spin system. The sequence contains a short cycle of the periodic resonant pulse excitation that offers new possibilities for implementing the long-lived multi-qubit quantum memory on the condensed spin ensembles that are so important for construction of universal quantum computer and long-distance quantum communications.

  15. Three-cell traveling wave superconducting test structure

    SciTech Connect (OSTI)

    Avrakhov, Pavel; Kanareykin, Alexei; /Euclid Techlabs, Solon; Kazakov, Sergey; Solyak, Nikolay; Wu, Genfa; Yakovlev, Vyacheslav P.; /Fermilab

    2011-03-01T23:59:59.000Z

    Use of a superconducting traveling wave accelerating (STWA) structure with a small phase advance per cell rather than a standing wave structure may provide a significant increase of the accelerating gradient in the ILC linac. For the same surface electric and magnetic fields the STWA achieves an accelerating gradient 1.2 larger than TESLA-like standing wave cavities. The STWA allows also longer acceleration cavities, reducing the number of gaps between them. However, the STWA structure requires a SC feedback waveguide to return the few hundreds of MW of circulating RF power from the structure output to the structure input. A test single-cell cavity with feedback was designed, manufactured and successfully tested demonstrating the possibility of a proper processing to achieve a high accelerating gradient. These results open way to take the next step of the TW SC cavity development: to build and test a travelingwave three-cell cavity with a feedback waveguide. The latest results of the single-cell cavity tests are discussed as well as the design of the test 3-cell TW cavity.

  16. Bohr - Planck quantum theory, (Tesla) magnetic monopoles and fine structure constant

    E-Print Network [OSTI]

    Vladan Pankovic; Darko V. Kapor; Stevica Djurovic; Miodrag Krmar

    2014-10-17T23:59:59.000Z

    In this work we apply Bohr-Planck (Old quantum atomic and radiation) theory, i.e. and quasi-classical methods for analysis of the magnetic monopoles and other problems. We reproduce exactly some basic elements of the Dirac magnetic monopoles theory, especially Dirac electric/magnetic charge quantization condition. Also, we suggest a new, effective, simply called Tesla model (for analogy with positions of the solenoids by Tesla inductive motor) of the magnetic monopole instead of usual effective Dirac model (half-infinite, very tinny solenoid) of the magnetic monopole. In our, i.e. Tesla model we use three equivalent tiny solenoids connected in series with a voltage source. One end of any solenoid is placed at the circumference of a circle and solenoids are directed radial toward circle center. Length of any solenoid is a bit smaller than finite circle radius so that other end of any solenoid is very close to the circle center. Angles between neighboring solenoids equal $120^{\\circ}$. All this implies that, practically, there is no magnetic field, or, magnetic pole, e.g. $S$, in the circle center, and that whole system holds only other, $N$ magnetic pole, at the ends of the solenoids at circle circumference. Finally, we reproduce relatively satisfactory value of the fine structure constant using Planck, i.e. Bose-Einstein statistics and Wien displacement law.

  17. An 8-GW long-pulse generator based on Tesla transformer and pulse forming network

    SciTech Connect (OSTI)

    Su, Jiancang; Zhang, Xibo; Li, Rui; Zhao, Liang, E-mail: zhaoliang0526@163.com; Sun, Xu; Wang, Limin; Zeng, Bo; Cheng, Jie; Wang, Ying; Peng, Jianchang; Song, Xiaoxin [Science and Technology on High Power Microwave Laboratory, Northwest Institute of Nuclear Technology, Xi'an, Shaanxi 710024 (China)

    2014-06-15T23:59:59.000Z

    A long-pulse generator TPG700L based on a Tesla transformer and a series pulse forming network (PFN) is constructed to generate intense electron beams for the purpose of high power microwave (HPM) generation. The TPG700L mainly consists of a 12-stage PFN, a built-in Tesla transformer in a pulse forming line, a three-electrode gas switch, a transmission line with a trigger, and a load. The Tesla transformer and the compact PFN are the key technologies for the development of the TPG700L. This generator can output electrical pulses with a width as long as 200 ns at a level of 8 GW and a repetition rate of 50 Hz. When used to drive a relative backward wave oscillator for HPM generation, the electrical pulse width is about 100 ns on a voltage level of 520 kV. Factors affecting the pulse waveform of the TPG700L are also discussed. At present, the TPG700L performs well for long-pulse HPM generation in our laboratory.

  18. Coherent dipole-dipole coupling between two single atoms at a Förster resonance

    E-Print Network [OSTI]

    Sylvain Ravets; Henning Labuhn; Daniel Barredo; Lucas Béguin; Thierry Lahaye; Antoine Browaeys

    2014-05-30T23:59:59.000Z

    Resonant energy transfers, i.e. the non-radiative redistribution of an electronic excitation between two particles coupled by the dipole-dipole interaction, lie at the heart of a variety of chemical and biological phenomena, most notably photosynthesis. In 1948, F\\"orster established the theoretical basis of fluorescence resonant energy transfer (FRET), paving the ground towards the widespread use of FRET as a "spectroscopic ruler" for the determination of nanometer-scale distances in biomolecules. The underlying mechanism is a coherent dipole-dipole coupling between particles, as already recognized in the early days of quantum mechanics, but this coherence was not directly observed so far. Here, we study, both spectroscopically and in the time domain, the coherent, dipolar-induced exchange of electronic excitations between two single Rydberg atoms separated by a controlled distance as large as 15 microns, and brought into resonance by applying a small electric field. The coherent oscillation of the system between two degenerate pair states occurs at a frequency that scales as the inverse third power of the distance, the hallmark of dipole-dipole interactions. Our results not only demonstrate, at the most fundamental level of two atoms, the basic mechanism underlying FRET, but also open exciting prospects for active tuning of strong, coherent interactions in quantum many-body systems.

  19. 2003 Annual Superconductivity2003 Annual Superconductivity Peer ReviewPeer Review

    E-Print Network [OSTI]

    2003 Annual Superconductivity2003 Annual Superconductivity Peer ReviewPeer Review Raghu;Superconductivity Program at NREL for Electric SystemsSuperconductivity Program at NREL for Electric Systems Non) Industry CRADA:Industry CRADA: Oxford Superconducting Technologies (Ken Marken, Miao Hanping) *University

  20. Superconducting Topological Insulators

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over Our InstagramStructure of All-Polymer.Supercomputing on aSuperconducting Topological

  1. Superconducting Topological Insulators

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over Our InstagramStructure of All-Polymer.Supercomputing on aSuperconducting

  2. Superconducting Topological Insulators

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over Our InstagramStructure of All-Polymer.Supercomputing onSuperconducting Topological

  3. Superconductivity Centennial | Jefferson Lab

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over Our InstagramStructure of All-Polymer.Supercomputing onSuperconducting

  4. Normal-state transport in electron-doped La2-xCexCuO4 thin films in magnetic fields up to 40 Tesla

    E-Print Network [OSTI]

    Moshchalkov, Victor V.

    Normal-state transport in electron-doped La2-xCexCuO4 thin films in magnetic fields up to 40 Tesla.17 are studied in magnetic fields up to 40 Tesla. For the whole doping region investigated, the negative, the upper critical mag- netic field Bc2 order of 100 Tesla 8 is too high to be achieved. The n-type HTSCs

  5. Ramp-rate sensitivity of SSC dipole magnet prototypes

    SciTech Connect (OSTI)

    Devred, A.; Ogitsu, T.

    1994-07-01T23:59:59.000Z

    One of the major achievements of the magnet R&D program for the Superconducting Super Collider (SSC) is the fabrication and test of a series of 20 5-cm aperture, 15-m long dipole magnet prototypes. The ramp rate sensitivity of these magnets appears to fall in at least two categories that can be correlated to the manufacturer and production batch of the strands used for the inner-coil cables. The first category, referred to as type-A, is characterized by a strong quench current degradation at high ramp rates, usually accompanied by large distortions of the multipole fields and large energy losses. The second category, referred to as type-B, is characterized by a sudden drop of quench current at low ramp rates, followed by a much milder degradation at larger rates. The multipole fields of the type-B magnets show little ramp-rate sensitivity, and the energy losses are smaller than for the type-A magnets. The behavior of the Type-A magnets can be explained in terms of inter-strand eddy currents arising from low and non-uniform resistances at the crossovers between the strands of the two-layer Rutherford-type cable. Anomalies in the transport-current repartition among the cable strands are suggested as a possible cause for the type-B behavior. The origins of these anomalies have not yet been clearly identified. The SSC project was canceled by decision of the United States Congress on October 21, 1994.

  6. Tests of an RF Dipole Crabbing Cavity for an Electron-Ion Collider

    SciTech Connect (OSTI)

    Castilla Loeza, Alejandro [ODU, JLAB; Delayen, Jean R. [ODU, JLAB

    2013-12-01T23:59:59.000Z

    On the scheme of developing a medium energy electron-ion collider (MEIC) at Jefferson Lab, we have designed a compact superconducting rf dipole cavity at 750 MHz to crab both electron and ion bunches and increase luminosities at the interaction points (IP) of the machine. Following the design optimization and characterization of the electromagnetic properties such as peak surface fields and shunt impedance, along with field nonuniformities, multipole components content, higher order modes (HOM) and multipacting, a prototype cavity was built by Niowave Inc. The 750 MHz prototype crab cavity has been tested at 4 K and is ready for re-testing at 4 K and 2 K at Jefferson Lab. In this paper we present the detailed results of the rf tests performed on the 750 MHz crab cavity prototype.

  7. Overview on superconducting photoinjectors

    E-Print Network [OSTI]

    Arnold, A

    2011-01-01T23:59:59.000Z

    The success of most of the proposed energy recovery linac (ERL) based electron accelerator projects for future storage ring replacements (SRR) and high power IR–free-electron lasers (FELs) largely depends on the development of an appropriate source. For example, to meet the FEL specifications [J.W. Lewellen, Proc. SPIE Int. Soc. Opt. Eng. 5534, 22 (2004)] electron beams with an unprecedented combination of high brightness, low emittance (0.1 ”mrad), and high average current (hundreds of mA) are required. An elegant way to create a beam of such quality is to combine the high beam quality of a normal conducting rf photoinjector with the superconducting technology, i.e., to build a superconducting rf photoinjector (SRF gun). SRF gun R&D programs based on different approaches have been launched at a growing number of institutes and companies (AES, Beijing University, BESSY, BNL, DESY, FZD, TJNAF, Niowave, NPS, Wisconsin University). Substantial progress was achieved in recent years and the first long term ...

  8. Overview of Superconducting Photoinjectors

    E-Print Network [OSTI]

    Arnold, A

    2009-01-01T23:59:59.000Z

    The success of most of the proposed ERL based electron accelerator projects for future storage ring replacements (SRR) and high power IR-FELs is contingent upon the development of an appropriate source. Electron beams with an unprecedented combination of high brightness, low emittance (0.1 ”m rad) and high average current (hundreds of mA) are required to meet the FEL specification [1]. An elegant way to create such an unique beam is to combine the high beam quality of a normal conducting RF photo injector with the superconducting technology to get a superconducting RF photo injector (SRF gun). SRF gun R&D programs based on different approaches are under investigation at a growing number of institutes and companies (AES, Beijing University, BESSY, BNL, DESY, FZD, JLab, Niowave, NPS, Wisconsin University). Lot of progress could be achieved during the last years and first long term operation was demonstrated at the FZD [2]. In the near future, this effort will lead to SRF guns, which are indispensab...

  9. Preliminary Test Results for the MICE Spectrometer Superconducting Solenoids

    E-Print Network [OSTI]

    Virostek, Steve P.

    2009-01-01T23:59:59.000Z

    Transactions on Applied Superconductivity 19, No. 3 MICETransactions on Applied Superconductivity 15, No. 2, p 1259,Transactions on Applied Superconductivity 18, No. 2, p 937,

  10. Quantum State Protection and Transfer Using Superconducting Qubits

    E-Print Network [OSTI]

    Keane, Kyle Michael

    2012-01-01T23:59:59.000Z

    relaxation . . . . . . . . .1.5 Superconducting ? ux-biasedCorrection Algorithms for Superconducting Qubits,” APS Marchand correction for superconducting qubits,” Phys. Rev. A,

  11. SUPERCONDUCTING TRANSITION EDGE BOLOMETER AND NOISE IN THIN FILMS

    E-Print Network [OSTI]

    Yeh, Nan-Hsiung

    2011-01-01T23:59:59.000Z

    a) Composite Al superconducting bolometer (b) Composite SNSLBL-8019 SUPERCONDUCTING TRANSITION EDGE BOLOMETER AND INrights . LBL-8019 SUPERCONDUCTING TRANSITION EDGE BOLOMETER

  12. Special issue on quantum computing with superconducting qubits

    E-Print Network [OSTI]

    Korotkov, Alexander N.

    2009-01-01T23:59:59.000Z

    on quantum computing with superconducting qubits 10. Shaw,quantum computing with superconducting qubits Alexander N.years ago the ?rst superconducting qubit was demonstrated

  13. FORCED TWO PHASE HELIUM COOLING OF LARGE SUPERCONDUCTING MAGNETS

    E-Print Network [OSTI]

    Green, M.A.

    2010-01-01T23:59:59.000Z

    DIAMETER TPC THIN SUPERCONDUCTING SOLENOID . 'i.A. Green,and Construction of a Superconducting Stabilized AluminumM.A. Green, "Large Superconducting Detector Magnets with

  14. Exotic superconducting phases of ultracold atom mixtures on triangular lattices

    E-Print Network [OSTI]

    Mathey, Ludwig; Tsai, Shan-Wen; Castro Neto, Antonio H.

    2007-01-01T23:59:59.000Z

    Exotic Superconducting Phases of Ultracold Atom Mixtures onlattice contain exotic superconducting phases. For spin-1/2competition between superconducting phases with di?erent

  15. GROUND PLANE INSULATION FAILURE IN THE FIRST TPC SUPERCONDUCTING COIL

    E-Print Network [OSTI]

    Green, M.A.

    2010-01-01T23:59:59.000Z

    FAILURE IN THE FIRST TPC SUPERCONDUCTING COIL M. A. Green,Time Projection Cnamber) thin superconducting solenoid. Thefailure of the first superconducting coil at the Lawrence

  16. A Superconducting transformer system for high current cable testing

    E-Print Network [OSTI]

    Godeke, A.

    2010-01-01T23:59:59.000Z

    A Superconducting Transformer System for High Current Cablea Direct-Current (DC) superconducting transformer system forhigh current test of superconducting cables. The transformer

  17. Progress on Superconducting Magnets for the MICE Cooling Channel

    E-Print Network [OSTI]

    Green, Michael A

    2010-01-01T23:59:59.000Z

    274 Progress on the Superconducting Magnets for the MICEM. A Green and J. M. Rey, “Superconducting Solenoids for anG, “Supercritically Cooled Superconducting Muon Channel,”

  18. Certification of Superconducting Solenoid-Based Focusing Lenses

    SciTech Connect (OSTI)

    DiMarco, E.Joseph; Hemmati, Ali M.; Orris, Darryl F.; Page, Thomas M.; Rabehl, Roger H.; Tartaglia, Michael A.; Terechkine, Iouri; Tompkins, John C.

    2010-07-29T23:59:59.000Z

    The first production focusing lens for the HINS beam line at Fermilab has been assembled into a cryostat and tested. A total of 5 devices will be tested before they are installed in the low energy section of the HINS beam line, which uses copper Crossbar-H (CH) style RF cavities. One of the tested CH-section lens assemblies includes a pair of weak orthogonal steering dipoles nested within a strong focusing solenoid, and has six vapor cooled power leads. The other device has only the strong focusing solenoid, and utilizes a single pair of HTS power leads. The production test program is designed to measure the thermal performance of the cryostat, minimum cooling requirements for the HTS leads, quench performance of all superconducting components, and precise determination of the magnetic axis and field angles. Results and future plans for the first production device tests are presented.

  19. Superconducting helical solenoid systems for muon cooling experiment at Fermilab

    SciTech Connect (OSTI)

    Kashikhin, Vladimir S.; Andreev, Nikolai; /Fermilab; Johnson, Rolland P.; /MUONS Inc., Batavia; Kashikhin, Vadim V.; Lamm, Michael J.; Romanov, Gennady; Yonehara, Katsuya; Zlobin, Alexander V.; /Fermilab

    2007-08-01T23:59:59.000Z

    Novel configurations of superconducting magnet system for Muon Beam Cooling Experiment is under design at Fermilab. The magnet system has to generate longitudinal and transverse dipole and quadrupole helical magnetic fields providing a muon beam motion along helical orbit. It was found that such complicated field configuration can be formed by a set of circular coils shifted in transverse directions in such a way that their centers lay on the center of the helical beam orbit. Closed beam orbit configurations were also proposed and investigated. This paper describes the magnetic and mechanical designs and parameters of such magnetic system based on a NbTi Rutherford type cable. The helical solenoid fabrication, assembly and quench protection issues are presented.

  20. Tests of prototype SSC (Superconducting Super Collider) magnets

    SciTech Connect (OSTI)

    Strait, J.; Brown, B.C.; Hanft, R.; Koepke, K.; Kuchnir, M.; Lundy, R.; Mantsch, P.; Mazur, P.O.; McInturff, A.; Orr, J.R.

    1987-09-21T23:59:59.000Z

    Results are presented from tests of the third full scale development dipole magnet for the Superconducting Super Collider and from a retest of a 4.5 m model magnet of the same design mounted in an SSC cryostat. The 4.5 m magnet shows consistent quench performance between its original tests in boiling liquid helium in a vertical dewar and the current tests in forced flow helium in a horizontal cryostat. Little or no retraining is observed over several thermal cycles. The full length magnet requires 12 quenches to train to its short sample limit of 6800 A and displays a reasonably stable quench plateau following training. This represents a great improvement over the performance of the first two full length magnets. Data are presented on quench behavior as a function of current and temperature and on azimuthal and longitudinal loading of the coil by the support structure. 14 refs., 7 figs.

  1. Radio Broadcasts from Superconducting Strings

    E-Print Network [OSTI]

    Yi-Fu Cai; Eray Sabancilar; Daniele A. Steer; Tanmay Vachaspati

    2012-05-14T23:59:59.000Z

    Superconducting cosmic strings can give transient electromagnetic signatures that we argue are most evident at radio frequencies. We investigate the three different kinds of radio bursts from cusps, kinks, and kink-kink collisions on superconducting strings. We find that the event rate is dominated by kink bursts in a range of parameters that are of observational interest, and can be quite high (several a day at 1 Jy flux) for a canonical set of parameters. In the absence of events, the search for radio transients can place stringent constraints on superconducting cosmic strings.

  2. Production and study of high-beta plasma confined by a superconducting dipole magneta...

    E-Print Network [OSTI]

    Mauel, Michael E.

    , Columbia University, New York, New York 10027 A. C. Boxer, J. Ellsworth, I. Karim, J. Kesner, S. Mahar. Kesner et al., in Fusion Energy 1998, 1165 1999 is a new research facility that is exploring heating at 2.45 and 6.4 GHz, and a population of energetic electrons, with mean energies above 50 ke

  3. DESIGN OF A 10-T SUPERCONDUCTING DIPOLE MAGNET USING NIOBIUM-TIN CONDUCTOR

    E-Print Network [OSTI]

    Taylor, C.

    2011-01-01T23:59:59.000Z

    NIOBIUM-TIN CONOOCTOR' C. Taylor, R. Meuser. S. Caspi. W.NIOBIUM-TIN CONDUCTOR C. Taylor, R. Meuser, S. Caspi, W.NIOBIUM-TIN CONDUCTOR* C. Taylor, R. Meuser, S. Caspi, W.

  4. Ramp Rate Sensitivities of Several Superconducting Dipole Magnets Operated in He I and Superfluid He II

    E-Print Network [OSTI]

    Caspi, S.

    2011-01-01T23:59:59.000Z

    Correlation with Measured Heat Inputs and Reat Transfer Theas a calorimeter, deducing the heat Input directly from theand o-7G, with doubled heat input, are almost the same . We

  5. Instantaneous Power Radiated from Magnetic Dipole Moments

    E-Print Network [OSTI]

    Peter D. Morley; Douglas J. Buettner

    2014-07-04T23:59:59.000Z

    We compute the power radiated per unit solid angle of a moving magnetic dipole moment, and its instantaneous radiated power, both non-relativistically and relativistically. This is then applied to various interesting situations: solar neutrons, electron synchrotrons and cosmological Dirac neutrinos. Concerning the latter, we show that hypothesized early-universe Big Bang conditions allow for neutrino radiation cooling and provide an energy loss-mechanism for subsequent neutrino condensation.

  6. Multiple frequency printed slot and dipole antennas

    E-Print Network [OSTI]

    Kolsrud, Arild

    1997-01-01T23:59:59.000Z

    . Analysis. . D. Single Frequency Slot Antenna. , , , 32 . 41 E. Dual Frequency Slot Antenna. F. Chapter Summary. 48 Page CHAPTER IV PRINTED CPW-FED CPS DIPOLE. . . . . . . 53 A. Introduction. 53 B. Background. 54 C. Analysis. . D. Single... on the structure affects the performance by looking at the current distribution. Far-field radiation patterns of a structure can be calculated from the current distribution output data file. C. Chapter Summary Sonnet is mainly used for circuit structures, since...

  7. Homogenisation of a Row of Dislocation Dipoles

    E-Print Network [OSTI]

    Stephen Jonathan Chapman; Yang Xiang; Yichao Zhu

    2015-04-27T23:59:59.000Z

    Conventional discrete-to-continuum approaches have seen their limitation in describing the collective behaviour of the multi-polar configurations of dislocations, which are widely observed in crystalline materials. The reason is that dislocation dipoles, which play an important role in determining the mechanical properties of crystals, often get smeared out when traditional homogenisation methods are applied. To address such difficulties, the collective behaviour of a row of dislocation dipoles is studied by using matched asymptotic techniques. The discrete-to-continuum transition is facilitated by introducing two field variables respectively describing the dislocation pair density potential and the dislocation pair width. It is found that the dislocation pair width evolves much faster than the pair density. Such hierarchy in evolution time scales enables us to describe the dislocation dynamics at the coarse-grained level by an evolution equation for the slowly varying variable (the pair density) coupled with an equilibrium equation for the fast varying variable (the pair width). The time-scale separation method adopted here paves a way for properly incorporating dipole-like (zero net Burgers vector but non-vanishing) dislocation structures, known as the statistically stored dislocations (SSDs) into macroscopic models of crystal plasticity in three dimensions. Moreover, the natural transition between different equilibrium patterns found here may also shed light on understanding the emergence of the persistent slip bands (PSBs) in fatigue metals induced by cyclic loads.

  8. Dynamics of two-dimensional dipole systems

    SciTech Connect (OSTI)

    Golden, Kenneth I.; Kalman, Gabor J.; Hartmann, Peter; Donko, Zoltan [Department of Mathematics and Statistics, Department of Physics, University of Vermont, Burlington, Vermont 05401 (United States); Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467 (United States); Research Institute for Solid State Physics and Optics, Hungarian Academy of Sciences, P.O. Box 49, H-1525 Budapest, Hungary and Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467 (United States)

    2010-09-15T23:59:59.000Z

    Using a combined analytical/molecular dynamics approach, we study the current fluctuation spectra and longitudinal and transverse collective mode dispersions of the classical two-dimensional (point) dipole system (2DDS) characterized by the {phi}{sub D}(r)={mu}{sup 2}/r{sup 3} repulsive interaction potential; {mu} is the electric dipole strength. The interest in the 2DDS is twofold. First, the quasi-long-range 1/r{sup 3} interaction makes the system a unique classical many-body system, with a remarkable collective mode behavior. Second, the system may be a good model for a closely spaced semiconductor electron-hole bilayer, a system that is in the forefront of current experimental interest. The longitudinal collective excitations, which are of primary interest for the liquid phase, are acoustic at long wavelengths. At higher wave numbers and for sufficiently high coupling strength, we observe the formation of a deep minimum in the dispersion curve preceded by a sharp maximum; this is identical to what has been observed in the dispersion of the zero-temperature bosonic dipole system, which in turn emulates so-called roton-maxon excitation spectrum of the superfluid {sup 4}He. The analysis we present gives an insight into the emergence of this apparently universal structure, governed by strong correlations. We study both the liquid and the crystalline solid state. We also observe the excitation of combination frequencies, resembling the roton-roton, roton-maxon, etc. structures in {sup 4}He.

  9. Direct amplitude detuning measurement with ac dipole

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

    White, S.; Maclean, E.; Tomás, R.

    2013-07-01T23:59:59.000Z

    In circular machines, nonlinear dynamics can impact parameters such as beam lifetime and could result in limitations on the performance reach of the accelerator. Assessing and understanding these effects in experiments is essential to confirm the accuracy of the magnetic model and improve the machine performance. A direct measurement of the machine nonlinearities can be obtained by characterizing the dependency of the tune as a function of the amplitude of oscillations (usually defined as amplitude detuning). The conventional technique is to excite the beam to large amplitudes with a single kick and derive the tune from turn-by-turn data acquired with beam position monitors. Although this provides a very precise tune measurement it has the significant disadvantage of being destructive. An alternative, nondestructive way of exciting large amplitude oscillations is to use an ac dipole. The perturbation Hamiltonian in the presence of an ac dipole excitation shows a distinct behavior compared to the free oscillations which should be correctly taken into account in the interpretation of experimental data. The use of an ac dipole for direct amplitude detuning measurement requires careful data processing allowing one to observe the natural tune of the machine; the feasibility of such a measurement is demonstrated using experimental data from the Large Hadron Collider. An experimental proof of the theoretical derivations based on measurements performed at injection energy is provided as well as an application of this technique at top energy using a large number of excitations on the same beam.

  10. Mechanical Behaviour of the Short Models of LHC Main Dipole Magnets

    E-Print Network [OSTI]

    Andreyev, N I; Casarejos, E; Kurtyka, T; Rathjen, C; Perini, D; Siegel, N; Tommasini, D; Vanenkov, I

    1998-01-01T23:59:59.000Z

    A series of single and twin aperture 1 metre magnet models has been built and tested in the framework of the R&D program of main superconducting dipole magnets for the Large Hadron Collider project. The se models, designed for a nominal field of 8.3 T at 1.8 K, have been constructed to test the performance of SC coils and to optimise various design options for the full length 15 metre long dipoles. T he models have been extensively equipped with a specially developed mechanical instrumentation, enabling both the control of main assembly parameters - like coil azimuthal and axial pre-load, stress i n the outer shrinking cylinder - and also the monitoring of magnet behaviour during cooling and energising, under the action of electromagnetic forces. The instrumentation used, mainly based on strain gauge transducers, is described and the results of mechanical measurements obtained during power tests of the models are discussed and compared with the design predictions based on Finite Element calc ulations.

  11. Superconducting dark energy

    E-Print Network [OSTI]

    Liang, Shi-Dong

    2015-01-01T23:59:59.000Z

    Based on the analogy with superconductor physics we consider a scalar-vector-tensor gravitational model, in which the dark energy action is described by a gauge invariant electromagnetic type functional. By assuming that the ground state of the dark energy is in a form of a condensate with the U(1) symmetry spontaneously broken, the gauge invariant electromagnetic dark energy can be described in terms of the combination of a vector and of a scalar field (corresponding to the Goldstone boson), respectively. The gravitational field equations are obtained by also assuming the possibility of a non-minimal coupling between the cosmological mass current and the superconducting dark energy. The cosmological implications of the dark energy model are investigated for a Friedmann-Robertson-Walker homogeneous and isotropic geometry for two particular choices of the electromagnetic type potential, corresponding to a pure electric type field, and to a pure magnetic field, respectively. The time evolution of the scale fact...

  12. Superconducting magnetic energy storage

    SciTech Connect (OSTI)

    Hassenzahl, W.

    1988-08-01T23:59:59.000Z

    Recent programmatic developments in Superconducting Magnetic Energy Storage (SMES) have prompted renewed and widespread interest in this field. In mid 1987 the Defense Nuclear Agency, acting for the Strategic Defense Initiative Office, issued a request for proposals for the design and construction of SMES Engineering Test Model (ETM). Two teams, one led by Bechtel and the other by Ebasco, are now engaged in the first phase of the development of a 10 to 20 MWhr ETM. This report presents the rationale for energy storage on utility systems, describes the general technology of SMES, and explains the chronological development of the technology. The present ETM program is outlined; details of the two projects for ETM development are described in other papers in these proceedings. The impact of high T/sub c/ materials on SMES is discussed. 69 refs., 3 figs., 3 tabs.

  13. Superconducting magnetic coil

    DOE Patents [OSTI]

    Aized, D.; Schwall, R.E.

    1999-06-22T23:59:59.000Z

    A superconducting magnetic coil includes a plurality of sections positioned axially along the longitudinal axis of the coil, each section being formed of an anisotropic high temperature superconductor material wound about a longitudinal axis of the coil and having an associated critical current value that is dependent on the orientation of the magnetic field of the coil. The cross section of the superconductor, or the type of superconductor material, at sections along the axial and radial axes of the coil are changed to provide an increased critical current at those regions where the magnetic field is oriented more perpendicularly to the conductor plane, to thereby increase the critical current at these regions and to maintain an overall higher critical current of the coil. 15 figs.

  14. Superconducting energy storage

    SciTech Connect (OSTI)

    Giese, R.F.

    1993-10-01T23:59:59.000Z

    This report describes the status of energy storage involving superconductors and assesses what impact the recently discovered ceramic superconductors may have on the design of these devices. Our description is intended for R&D managers in government, electric utilities, firms, and national laboratories who wish an overview of what has been done and what remains to be done. It is assumed that the reader is acquainted with superconductivity, but not an expert on the topics discussed here. Indeed, it is the author`s aim to enable the reader to better understand the experts who may ask for the reader`s attention, support, or funding. This report may also inform scientists and engineers who, though expert in related areas, wish to have an introduction to our topic.

  15. Superconductivity, Superfluidity and Holography

    E-Print Network [OSTI]

    Alberto Salvio

    2013-01-16T23:59:59.000Z

    This is a concise review of holographic superconductors and superfluids. We highlight some predictions of the holographic models and the emphasis is given to physical aspects rather than to the technical details, although some references to understand the latter are systematically provided. We include gapped systems in the discussion, motivated by the physics of high-temperature superconductivity. In order to do so we consider a compactified extra dimension (with radius R), or, alternatively, a dilatonic field. The first setup can also be used to model cylindrical superconductors; when these are probed by an axial magnetic field a universal property of holography emerges: while for large R (compared to the other scales in the problem) non-local operators are suppressed, leading to the so called Little-Parks periodicity, the opposite limit shows non-local effects, e.g. the uplifting of the Little-Parks periodicity. This difference corresponds in the gravity side to a Hawking-Page phase transition.

  16. Spinning superconducting electrovacuum soliton

    E-Print Network [OSTI]

    Irina Dymnikova

    2006-07-24T23:59:59.000Z

    In nonlinear electrodynamics coupled to general relativity and satisfying the weak energy condition, a spherically symmetric electrically charged electrovacuum soliton has obligatory de Sitter center in which the electric field vanishes while the energy density of electromagnetic vacuum achieves its maximal value. De Sitter vacuum supplies a particle with the finite positive electromagnetic mass related to breaking of space-time symmetry from the de Sitter group in the origin. By the G\\"urses-G\\"ursey algorithm based on the Newman-Trautman technique it is transformed into a spinning electrovacuum soliton asymptotically Kerr-Newman for a distant observer. De Sitter center becomes de Sitter equatorial disk which has both perfect conductor and ideal diamagnetic properties. The interior de Sitter vacuum disk displays superconducting behavior within a single spinning soliton. This behavior found for an arbitrary nonlinear lagrangian ${\\cal L}(F)$, is generic for the class of regular spinning electrovacuum solutions describing both black holes and particle-like structures.

  17. Superconducting magnetic coil

    DOE Patents [OSTI]

    Aized, Dawood (Marlboro, MA); Schwall, Robert E. (Northborough, MA)

    1999-06-22T23:59:59.000Z

    A superconducting magnetic coil includes a plurality of sections positioned axially along the longitudinal axis of the coil, each section being formed of an anisotropic high temperature superconductor material wound about a longitudinal axis of the coil and having an associated critical current value that is dependent on the orientation of the magnetic field of the coil. The cross section of the superconductor, or the type of superconductor material, at sections along the axial and radial axes of the coil are changed to provide an increased critical current at those regions where the magnetic field is oriented more perpendicularly to the conductor plane, to thereby increase the critical current at these regions and to maintain an overall higher critical current of the coil.

  18. Facilities: NHMFL 14.5 Tesla Fourier Transform Ion Cyclotron Resonance Mass Spectrometer Citation: A Pseudoatomic Model of the COPII Cage Obtained from Cryo-Electron Microscopy and Mass Spectrometry,

    E-Print Network [OSTI]

    Weston, Ken

    Facilities: NHMFL 14.5 Tesla Fourier Transform Ion Cyclotron Resonance Mass Spectrometer Citation ultrahigh-resolution 14.5 tesla Fourier transform ion cyclotron resonance mass spectrometry. The Mag

  19. Mixed-mu superconducting bearings

    DOE Patents [OSTI]

    Hull, J.R.; Mulcahy, T.M.

    1998-03-03T23:59:59.000Z

    A mixed-mu superconducting bearing is disclosed including a ferrite structure disposed for rotation adjacent a stationary superconductor material structure and a stationary permanent magnet structure. The ferrite structure is levitated by said stationary permanent magnet structure. 9 figs.

  20. Mixed-mu superconducting bearings

    DOE Patents [OSTI]

    Hull, John R. (Hinsdale, IL); Mulcahy, Thomas M. (Western Springs, IL)

    1998-01-01T23:59:59.000Z

    A mixed-mu superconducting bearing including a ferrite structure disposed for rotation adjacent a stationary superconductor material structure and a stationary permanent magnet structure. The ferrite structure is levitated by said stationary permanent magnet structure.

  1. EIS-0138: Superconducting Super Collider

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy developed this EIS to analyze the potential environmental impacts of constructing the Superconducting Super Collider, a large proton accelerator, at each of seven alternative locations.

  2. On the theory of superconductivity 

    E-Print Network [OSTI]

    Cheng, Kai-Chia

    The phenomenon of superconductivity has so for defied all attempts of explanation since it was first discovered in 1911. Although two phenomenological theories have been put forward and proved very successful, yet no atomic theories based on quantum...

  3. Process for producing clad superconductive materials

    DOE Patents [OSTI]

    Cass, Richard B. (Ringoes, NJ); Ott, Kevin C. (Los Alamos, NM); Peterson, Dean E. (Los Alamos, NM)

    1992-01-01T23:59:59.000Z

    A process for fabricating superconducting composite wire by the steps of placing a superconductive precursor admixture capable of undergoing a self propagating combustion in stoichiometric amounts sufficient to form a superconductive product within a metal tube, sealing one end of said tube, igniting said superconductive precursor admixture whereby said superconductive precursor admixture endburns along the length of the admixture, and cross-section reducing said tube at a rate substantially equal to the rate of burning of said superconductive precursor admixture and at a point substantially planar with the burnfront of the superconductive precursor mixture, whereby a clad superconductive product is formed in situ, the product characterized as superconductive without a subsequent sintering stage, is disclosed.

  4. The challenge of unconventional superconductivity.

    SciTech Connect (OSTI)

    Norman, M. R. (Materials Science Division)

    2011-04-08T23:59:59.000Z

    During the past few decades, several new classes of superconductors have been discovered that do not appear to be related to traditional superconductors. The source of the superconductivity of these materials is likely different from the electron-ion interactions that are at the heart of conventional superconductivity. Developing a rigorous theory for any of these classes of materials has proven to be a difficult challenge and will remain one of the major problems in physics in the decades to come.

  5. Electrodynamics of superconducting pnictide superlattices

    SciTech Connect (OSTI)

    Perucchi, A.; Pietro, P. Di [INSTM Udr Trieste-ST and Elettra - Sincrotrone Trieste S.C.p.A., Area Science Park, I-34012 Trieste (Italy); Capitani, F. [Dipartimento di Fisica, Università di Roma Sapienza, Piazzale Aldo Moro 2, I-00185 Rome (Italy); Lupi, S. [CNR-IOM and Dipartimento di Fisica, Università di Roma Sapienza, P.le Aldo Moro 2, I-00185 Roma (Italy); Lee, S.; Kang, J. H.; Eom, C. B. [Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706 (United States); Jiang, J.; Weiss, J. D.; Hellstrom, E. E. [Applied Superconductivity Center, National High Magnetic Field Laboratory, Florida State University, 2031 East Paul Dirac Drive, Tallahassee, Florida 32310 (United States); Dore, P. [CNR-SPIN and Dipartimento di Fisica, Università di Roma Sapienza, P.le Aldo Moro 2, I-00185 Roma (Italy)

    2014-06-02T23:59:59.000Z

    It was recently shown that superlattices where layers of the 8% Co-doped BaFe{sub 2}As{sub 2} superconducting pnictide are intercalated with non superconducting ultrathin layers of either SrTiO{sub 3} or of oxygen-rich BaFe{sub 2}As{sub 2}, can be used to control flux pinning, thereby increasing critical fields and currents, without significantly affecting the critical temperature of the pristine superconducting material. However, little is known about the electron properties of these systems. Here, we investigate the electrodynamics of these superconducting pnictide superlattices in the normal and superconducting state by using infrared reflectivity, from THz to visible range. We find that multigap structure of these superlattices is preserved, whereas some significant changes are observed in their electronic structure with respect to those of the original pnictide. Our results suggest that possible attempts to further increase the flux pinning may lead to a breakdown of the pnictide superconducting properties.

  6. Beam Based Alignment of the TESLA X-ray FEL undulators Deutsches Elektronen-Synchrotron (DESY), Notkestr. 85, 22607 Hamburg, Germany

    E-Print Network [OSTI]

    Beam Based Alignment of the TESLA X-ray FEL undulators B. Faatz Deutsches Elektronen the performance of the FEL is the overlap between electron beam and radiation field during the amplification The TESLA X-ray FEL laboratory is a proposed user facility in the wavelength range between Œ Ć and 6 nm

  7. Mechanical Design of HD2, a 15 T Nb3Sn Dipole Magnet with a 35 mm Bore

    SciTech Connect (OSTI)

    Ferracin, P.; Bartlett, S.E.; Caspi, S.; Dietderich, D.R.; Gourlay, S.A.; Hafalia, A.R.; Hannaford, C.R.; Lietzke, A.F.; Mattafirri, S.; McInturff, A.D.; Sabbi, G.L.

    2006-06-01T23:59:59.000Z

    After the fabrication and test of HD1, a 16 T Nb{sub 3}Sn dipole magnet based on flat racetrack coil configuration, the Superconducting Magnet Program at Lawrence Berkeley National Laboratory (LBNL) is developing the Nb{sub 3}Sn dipole HD2. With a dipole field above 15 T, a 35 mm clear bore, and nominal field harmonics within a fraction of one unit, HD2 represents a further step towards the application of block-type coils to high-field accelerator magnets. The design features tilted racetrack-type ends, to avoid obstructing the beam path, and a 4 mm thick stainless steel tube, to support the coil during the preloading operation. The mechanical structure, similar to the one used for HD1, is based on an external aluminum shell pretensioned with pressurized bladders. Axial rods and stainless steel plates provide longitudinal support to the coil ends during magnet excitation. A 3D finite element analysis has been performed to evaluate stresses and deformations from assembly to excitation, with particular emphasis on conductor displacements due to Lorentz forces. Numerical results are presented and discussed.

  8. Detection of pico-Tesla magnetic fields using magneto-electric sensors at room temperature

    SciTech Connect (OSTI)

    Zhai Junyi; Xing Zengping; Dong Shuxiang; Li Jiefang; Viehland, D. [Department of Materials Science and Engineering, Virginia Tech, Blacksburg, Virginia 24061 (United States)

    2006-02-06T23:59:59.000Z

    The measurement of low-frequency (10{sup -2}-10{sup 3} Hz) minute magnetic field variations (10{sup -12} Tesla) at room temperature in a passive mode of operation would be critically enabling for deployable neurological signal interfacing and magnetic anomaly detection applications. However, there is presently no magnetic field sensor capable of meeting all of these requirements. Here, we present new bimorph and push-pull magneto-electric laminate composites, which incorporate a charge compensation mechanism (or bridge) that dramatically enhances noise rejection, enabling achievement of such requirements.

  9. Experimental determination of magnetohydrodynamic seawater thruster performance in a two Tesla test facility

    SciTech Connect (OSTI)

    Picologlou, B.; Doss, E.; Black, D. (Argonne National Lab., IL (United States)); Sikes, W.C. (Newport News Shipbuilding and Dry Dock Co., VA (United States))

    1992-01-01T23:59:59.000Z

    A two Tesla test facility was designed, built, and operated to investigate the performance of magnetohydrodynamic (MHD) seawater thrusters. The results of this investigation are used to validate MHD thruster performance computer models. The facility test loop, its components, and their design are presented in detail. Additionally, the test matrix and its rational are discussed. finally, representative experimental results of the test program are presented, and are compared to pretest computer model predictions. Good agreement between predicted and measured data has served to validate the thruster performance computer models.

  10. Experimental determination of magnetohydrodynamic seawater thruster performance in a two Tesla test facility

    SciTech Connect (OSTI)

    Picologlou, B.; Doss, E.; Black, D. [Argonne National Lab., IL (United States); Sikes, W.C. [Newport News Shipbuilding and Dry Dock Co., VA (United States)

    1992-09-01T23:59:59.000Z

    A two Tesla test facility was designed, built, and operated to investigate the performance of magnetohydrodynamic (MHD) seawater thrusters. The results of this investigation are used to validate MHD thruster performance computer models. The facility test loop, its components, and their design are presented in detail. Additionally, the test matrix and its rational are discussed. finally, representative experimental results of the test program are presented, and are compared to pretest computer model predictions. Good agreement between predicted and measured data has served to validate the thruster performance computer models.

  11. Characterization of Ballistocardiogram Recorded at 1.5 and 3.0 Tesla in Simultaneous EEG-fMRI Zempel, J. M., Vincent, J. L., Larson-Prior, L. J., and Snyder, A. Z.

    E-Print Network [OSTI]

    Larson-Prior, Linda

    Characterization of Ballistocardiogram Recorded at 1.5 and 3.0 Tesla in Simultaneous EEG of BKG at 1.5 and 3.0 Tesla: ·3 subjects Experimental protocol: ·Functional images were simultaneously in the scanner (1.5 and 3 Tesla) with the same EEG equipment (amplifier, cap, cables) in consecutive sessions. ·3

  12. High Performance Superconducting Wire in High Applied Magnetic Fields via Nanoscale Defect Engineering

    SciTech Connect (OSTI)

    Goyal, Amit [ORNL; Wee, Sung Hun [ORNL; Zuev, Yuri L [ORNL; Cantoni, Claudia [ORNL

    2008-01-01T23:59:59.000Z

    High temperature superconducting (HTS) wires capable of carrying large critical currents with low dissipation levels in high applied magnetic fields are needed for a wide range of applications. In particular, for electric power applications involving rotating machinery, such as large-scale motors and generators, a high critical current, Ic, and a high engineering critical current density, JE, in applied magnetic fields in the range of 3 5 Tesla (T) at 65 K are required. In addition, exceeding the minimum performance requirements needed for these applications results in a lower fabrication cost, which is regarded as crucial to realize or enable many large-scale bulk applications of HTS materials. Here we report the fabrication of short segments of a potential superconducting wire comprised of a 4 m thick YBa2Cu3O7? (YBCO) layer on a biaxially textured substrate with a 50% higher Ic and JE than the highest values reported previously. The YBCO film contained columns of self-assembled nanodots of BaZrO3 (BZO) roughly oriented along the c-axis of YBCO. Although the YBCO film was grown at a high deposition rate, three-dimensional self-assembly of the insulating BZO nanodots still occurred. For all magnetic field orientations, minimum Ic and JE at 65 K, 3 T for the wire were 353 A cm?1 and 65.4 kA cm?2, respectively.

  13. A technique for monitoring fast tuner piezoactuator preload forces for superconducting rf cavities

    SciTech Connect (OSTI)

    Pischalnikov, Y.; Branlard, J.; Carcagno, R.; Chase, B.; Edwards, H.; Orris, D.; Makulski, A.; McGee, M.; Nehring, R.; Poloubotko, V.; Sylvester, C.; /Fermilab

    2007-06-01T23:59:59.000Z

    The technology for mechanically compensating Lorentz Force detuning in superconducting RF cavities has already been developed at DESY. One technique is based on commercial piezoelectric actuators and was successfully demonstrated on TESLA cavities [1]. Piezo actuators for fast tuners can operate in a frequency range up to several kHz; however, it is very important to maintain a constant static force (preload) on the piezo actuator in the range of 10 to 50% of its specified blocking force. Determining the preload force during cool-down, warm-up, or re-tuning of the cavity is difficult without instrumentation, and exceeding the specified range can permanently damage the piezo stack. A technique based on strain gauge technology for superconducting magnets has been applied to fast tuners for monitoring the preload on the piezoelectric assembly. The design and testing of piezo actuator preload sensor technology is discussed. Results from measurements of preload sensors installed on the tuner of the Capture Cavity II (CCII)[2] tested at FNAL are presented. These results include measurements during cool-down, warmup, and cavity tuning along with dynamic Lorentz force compensation.

  14. Prompt dipole radiation in fusion reactions

    E-Print Network [OSTI]

    Brunella Martin; Dimitra Pierroutsakou; Concetta Agodi; Rosa Alba; Virgil Baran; Alfonso Boiano; Giuseppe Cardella; Maria Colonna; Rosa Coniglione; Enrico De Filippo; Antonio Del Zoppo; Massimo Di Toro; Gianni Inglima; Tudor Glodariu; Marco La Commara; Concetta Maiolino; Marco Mazzocco; Angelo Pagano; Paolo Piattelli; Sara Pirrone; Carmelo Rizzo; Mauro Romoli; Mario Sandoli; Domenico Santonocito; Piera Sapienza; Cosimo Signorini

    2007-10-08T23:59:59.000Z

    The prompt gamma ray emission was investigated in the 16A MeV energy region by means of the 36,40Ar+96,92Zr fusion reactions leading to a compound nucleus in the vicinity of 132Ce. We show that the prompt radiation, which appears to be still effective at such a high beam energy, has an angular distribution pattern consistent with a dipole oscillation along the symmetry axis of the dinuclear system. The data are compared with calculations based on a collective bremsstrahlung analysis of the reaction dynamics.

  15. The measurement and analysis of the magnetic field of a synchrotron light source magnet 

    E-Print Network [OSTI]

    Graf, Udo Werner

    1994-01-01T23:59:59.000Z

    In this thesis a unique system is used to measure the magnetic field of a superconducting synchrotron light source magnet. The magnet measured is a superferric dipole C-magnet designed to produce a magnetic field up to 3 Tesla in magnitude. Its...

  16. High resolution low-temperature superconductivity superconducting quantum interference device microscope for imaging magnetic fields

    E-Print Network [OSTI]

    Weiss, Benjamin P.

    -temperature superconducting niobium wire coupled to the input circuit of a superconducting quantum interference device SQUID-stated advantages of high-temperature superconductivity HTS over the more advanced low- temperature superconductivity LTS is that the higher oper- ating temperature, typically around 77 K, allows HTS SQUIDs

  17. Suppressed Superconductivity on the Surface of Superconducting RF Quality Niobium for

    E-Print Network [OSTI]

    Suppressed Superconductivity on the Surface of Superconducting RF Quality Niobium for Particle 32310, USA Abstract. Significant performance degradation of superconducting RF (radio frequency) niobium superconductivity at chemically treated RF-quality niobium. We found that pinning of vortices along GBs is weaker

  18. Chapter 54. Superconducting Circuits and Quantum Computing Superconducting Circuits and Quantum Computing

    E-Print Network [OSTI]

    Chapter 54. Superconducting Circuits and Quantum Computing 54-1 Superconducting Circuits. William D. Oliver (MIT Lincoln Laboratory Senior Staff Member, RLE affiliate) Overview: Superconducting computer. Our qubit species of choice is the superconducting persistent-current (PC) qubit (also known

  19. OUT Success Stories: The Superconductivity Partnership Initiative

    SciTech Connect (OSTI)

    Reeca, L.; Platt, C.

    2000-08-05T23:59:59.000Z

    The U.S. Department of Energy's (DOE's) Superconductivity Partnership Initiative (SPI) stands at the forefront of worldwide efforts to advance research and development of superconducting power equipment for energy transmission, distribution, and industrial use.

  20. ORNL/HTSPC-12 ORNL Superconducting Technology

    E-Print Network [OSTI]

    ORNL/HTSPC-12 ORNL Superconducting Technology Program for Electric Power Systems Annual Report States Government or any agency thereof. #12;ORNL/HTSPC-12 ORNL SUPERCONDUCTING TECHNOLOGY PROGRAM

  1. ORNL/HTSPC-18 ORNL Superconducting Technology

    E-Print Network [OSTI]

    ORNL/HTSPC-18 ORNL Superconducting Technology Program for Electric Power Systems Annual Report Government or any agency thereof. #12;ORNL/HTSPC-18 ORNL SUPERCONDUCTING TECHNOLOGY PROGRAM FOR ELECTRIC

  2. ORNL/HTSPC-14 ORNL Superconducting Technology

    E-Print Network [OSTI]

    ORNL/HTSPC-14 ORNL Superconducting Technology Program for Electric Power Systems Annual Report States Government or any agency thereof. #12;ORNL/HTSPC-14 ORNL SUPERCONDUCTING TECHNOLOGY PROGRAM

  3. HIGH-FIELD SUPERCONDUCTING ACCELERATOR MAGNETS

    E-Print Network [OSTI]

    Taylor, C.

    2011-01-01T23:59:59.000Z

    D. C. 'Niobium-Titanium Superconducting Material s ', in S.Nb -Ti and Nb3Sn superconductors. , •• ,""" s. S. Clamp, Tie14, 1982 HIGH-FIELD SUPERCONDUCTING ACCELERATOR MAGNETS C.

  4. Superconducting Partnership with Readiness Review Update

    E-Print Network [OSTI]

    1 Superconducting Partnership with Industry: Readiness Review Update Mike Gouge, ORNL Steve Ashworth, LANL Paul Bakke, DOE-Golden DOE 2004 Superconductivity Peer Review July 27-29, 2004 #12;2 SPI

  5. ORNL/HTSPC-10 ORNL Superconducting

    E-Print Network [OSTI]

    ORNL/HTSPC-10 ORNL Superconducting Technology Program for Electric Power Systems Annual Report http://www.doe.gov/bridge #12;ORNL/HTSPC-10 ORNL SUPERCONDUCTING TECHNOLOGY PROGRAM FOR ELECTRIC POWER

  6. A SUPERCONDUCTING-SOLENOID ISOTOPE SPECTROMETER

    E-Print Network [OSTI]

    O'Donnell, Tom

    A SUPERCONDUCTING-SOLENOID ISOTOPE SPECTROMETER FOR PRODUCTION OF NEUTRON-RICH NUCLEI ( 136 Xe Superconducting Cyclotron Laboratory's weekly \\Green Sheet," 30 July 1999 #12; c Thomas W. O'Donnell 2000 All

  7. Improved superconducting magnet wire

    DOE Patents [OSTI]

    Schuller, I.K.; Ketterson, J.B.

    1983-08-16T23:59:59.000Z

    This invention is directed to a superconducting tape or wire composed of alternating layers of copper and a niobium-containing superconductor such as niobium of NbTi, Nb/sub 3/Sn or Nb/sub 3/Ge. In general, each layer of the niobium-containing superconductor has a thickness in the range of about 0.05 to 1.5 times its coherence length (which for Nb/sub 3/Si is 41 A) with each copper layer having a thickness in the range of about 170 to 600 A. With the use of very thin layers of the niobium composition having a thickness within the desired range, the critical field (H/sub c/) may be increased by factors of 2 to 4. Also, the thin layers of the superconductor permit the resulting tape or wire to exhibit suitable ductility for winding on a magnet core. These compositions are also characterized by relatively high values of critical temperature and therefore will exhibit a combination of useful properties as superconductors.

  8. Superconducting Cable Termination

    DOE Patents [OSTI]

    Sinha, Uday K. (Carrollton, GA); Tolbert, Jerry (Newnan, GA)

    2005-08-30T23:59:59.000Z

    Disclosed is a termination that connects high temperature superconducting (HTS) cable immersed in pressurized liquid nitrogen to high voltage and neutral (shield) external bushings at ambient temperature and pressure. The termination consists of a splice between the HTS power (inner) and shield (outer) conductors and concentric copper pipes which are the conductors in the termination. There is also a transition from the dielectric tape insulator used in the HTS cable to the insulators used between and around the copper pipe conductors in the termination. At the warm end of the termination the copper pipes are connected via copper braided straps to the conventional warm external bushings which have low thermal stresses. This termination allows for a natural temperature gradient in the copper pipe conductors inside the termination which enables the controlled flashing of the pressurized liquid coolant (nitrogen) to the gaseous state. Thus the entire termination is near the coolant supply pressure and the high voltage and shield cold bushings, a highly stressed component used in most HTS cables, are eliminated. A sliding seal allows for cable contraction as it is cooled from room temperature to ˜72-82 K. Seals, static vacuum, and multi-layer superinsulation minimize radial heat leak to the environment.

  9. A Synergy of Novel Experiments, Materials Science, Fundamental Physics, and Superconducting Magnets

    E-Print Network [OSTI]

    Godeke, Arno

    2007-01-01T23:59:59.000Z

    Fundamental Physics Superconducting Magnets Yields: Accuraterecord setting superconducting magnet systems ITER, NMRScience, Fundamental Physics, and Superconducting Magnets

  10. Fast superconducting magnetic field switch

    DOE Patents [OSTI]

    Goren, Yehuda (Mountain View, CA); Mahale, Narayan K. (The Woodlands, TX)

    1996-01-01T23:59:59.000Z

    The superconducting magnetic switch or fast kicker magnet is employed with electron stream or a bunch of electrons to rapidly change the direction of flow of the electron stream or bunch of electrons. The apparatus employs a beam tube which is coated with a film of superconducting material. The tube is cooled to a temperature below the superconducting transition temperature and is subjected to a constant magnetic field which is produced by an external dc magnet. The magnetic field produced by the dc magnet is less than the critical field for the superconducting material, thus, creating a Meissner Effect condition. A controllable fast electromagnet is used to provide a magnetic field which supplements that of the dc magnet so that when the fast magnet is energized the combined magnetic field is now greater that the critical field and the superconducting material returns to its normal state allowing the magnetic field to penetrate the tube. This produces an internal field which effects the direction of motion and of the electron stream or electron bunch. The switch can also operate as a switching mechanism for charged particles.

  11. A unified theory of superconductivity

    E-Print Network [OSTI]

    Xiuqing Huang

    2008-09-22T23:59:59.000Z

    In this paper, we study the reliability of BCS theory as a scientific explanation of the mystery of superconductivity. It is shown clearly that the phonon-mediated BCS theory is fundamentally incorrect. Two kinds of glues, pairing (pseudogap) glue and superconducting glue, are suggested based on a real space Coulomb confinement effect. The scenarios provide a unified explanation of the pairing symmetry, pseudogap and superconducting states, charge stripe order, spin density wave (SDW), checkerboard-type charge-ordered phase, magic doping fractions and vortex structures in conventional and unconventional (the high-Tc cuprates and MgB2) superconductors. The theory agrees with the existence of a pseudogap in high-temperature superconductors, while no pseudogap feature could be observed in MgB2 and most of the conventional superconductors. Our results indicate that the superconducting phase can coexist with a inclined hexagonal vortex lattice in pure MgB2 single crystal with a charge carrier density ps=1.49*10^{22}/cm^{3}. Finally, the physical reasons why the good conductors (for example, Ag, Au, and Cu) and the overdoped high-Tc superconductors are non-superconducting are also explored.

  12. Method and apparatus for fabricating superconducting wire

    SciTech Connect (OSTI)

    Kumar, N.

    1993-07-20T23:59:59.000Z

    A method is described for fabricating a superconducting wire comprising the steps of: in a first means, sputter depositing on a base wire a partial superconduction layer consisting of at least some, but not all, of the elements of an HTS material; and in a second means, reacting said partial superconduction layer with the other element or elements, including at least one metallic element, of the HTS material so that a complete superconduction layer is formed on said base wire.

  13. Superconducting wire with improved strain characteristics

    DOE Patents [OSTI]

    Luhman, Thomas (Westhampton Beach, NY); Klamut, Carl J. (E. Patchogue, NY); Suenaga, Masaki (Bellport, NY); Welch, David (Stony Brook, NY)

    1982-01-01T23:59:59.000Z

    A superconducting wire comprising a superconducting filament and a beryllium strengthened bronze matrix in which the addition of beryllium to the matrix permits a low volume matrix to exhibit reduced elastic deformation after heat treating which increases the compression of the superconducting filament on cooling and thereby improves the strain characteristics of the wire.

  14. Superconducting wire with improved strain characteristics

    DOE Patents [OSTI]

    Luhman, Thomas (Westhampton Beach, NY); Klamut, Carl J. (East Patchogue, NY); Suenaga, Masaki (Bellport, NY); Welch, David (Stony Brook, NY)

    1982-01-01T23:59:59.000Z

    A superconducting wire comprising a superconducting filament and a beryllium strengthened bronze matrix in which the addition of beryllium to the matrix permits a low volume matrix to exhibit reduced elastic deformation after heat treating which increases the compression of the superconducting filament on cooling and thereby improve the strain characteristics of the wire.

  15. ORNL/HTSPC-15 ORNL Superconducting Technology

    E-Print Network [OSTI]

    ORNL/HTSPC-15 ORNL Superconducting Technology Program for Electric Power Systems Annual Report government or any agency thereof. #12;ORNL/HTSPC-15 ORNL SUPERCONDUCTING TECHNOLOGY PROGRAM FOR ELECTRIC Manuscript Completed: March 2004 Date Published: June 2004 Prepared for the Superconductivity Program

  16. ORNL/HTSPC-16 ORNL Superconducting Technology

    E-Print Network [OSTI]

    ORNL/HTSPC-16 ORNL Superconducting Technology Program for Electric Power Systems Annual Report government or any agency thereof. #12;ORNL/HTSPC-16 ORNL SUPERCONDUCTING TECHNOLOGY PROGRAM FOR ELECTRIC ................................................................ 1-1 1.1 Ultera/ORNL HTS Cable Superconductivity Partnership with Industry (SPI

  17. Superconductivity in iron compounds G. R. Stewart

    E-Print Network [OSTI]

    Wu, Zhigang

    of the superconductivity in this new class of compounds. These iron pnictide and chalcogenide (FePn/Ch) superconductors-phonon coupled ``conventional'' superconductors. Clearly, superconductivity and magnetism or magnetic of magnetism and superconductivity in FePn/Ch superconductors 1606 D. Tc and TS=TSDW versus pressure 1607 1

  18. SUPERCONDUCTING MAGNETOMETERS By J. E. MERCEREAU,

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    13. SUPERCONDUCTING MAGNETOMETERS By J. E. MERCEREAU, California Institute of Technology, Alfred. P in superconducting tunnel junctions. Various structures have been fabricated in which this quantum relation dominates been the principal hallmark of the phenomena of superconductivity. It was, in fact, this effect which

  19. Flux Exclusion Superconducting Quantum Metamaterial: Towards

    E-Print Network [OSTI]

    Zheludev, Nikolay

    Flux Exclusion Superconducting Quantum Metamaterial: Towards Quantum-level Switching V. Savinov1, they require extremely high levels of nanofabrication. Here we introduce a new quantum superconducting properties of the mac- roscopic quantum state of superconducting carriers1 , and essentially plasmonic nature

  20. Bifurcation to vortex solutions in superconducting lms

    E-Print Network [OSTI]

    Chapman, Jon

    Bifurcation to vortex solutions in superconducting #12;lms T. Boeck #3; S.J. Chapman y Mathematical state to a superconducting state in a decreasing magnetic #12;eld is studied for a slab geometry of these behaviours will occur in practice. 1 Introduction If a superconducting body is placed in a suĂ?ciently strong

  1. Functional MR imaging of the awake monkey in a novel vertical large-bore 7 Tesla setup J. Pfeuffer1

    E-Print Network [OSTI]

    Jegelka, Stefanie

    Functional MR imaging of the awake monkey in a novel vertical large-bore 7 Tesla setup J. Pfeuffer1 , J. Pauls1 , M. Augath1 , T. Steudel1 , H. Merkle2 , N. K. Logothetis1 1 Max Planck InstituteMRI results in the awake trained monkey (Macaca mulatta) using a novel vertical 7T/60cm MR system are reported

  2. ECE alumnus Martin Eberhard and his all-electric Tesla Roadster NEWS FOR ECE ILLINOIS ALUMNI AND FRIENDS

    E-Print Network [OSTI]

    Liu, Gang "Logan"

    lighting that may have just as great an impact. Read more on page 4. Likewise, an all-electric car could change the world, too. The most attractive all-electric car I've ever seen is preparing to roll off Ford. When Tesla Motors is successful, as I predict it will be, many of us may drive an electric car

  3. Plasma expansion in the presence of a dipole magnetic field

    SciTech Connect (OSTI)

    Winske, D.; Omidi, N. [Applied Physics Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); SciberNet, Inc., Solana Beach, California 92075 (United States)

    2005-07-15T23:59:59.000Z

    Simulations of the initial expansion of a plasma injected into a stationary magnetized background plasma in the presence of a dipole magnetic field are carried out in two dimensions with a kinetic ion, massless fluid electron (hybrid) electromagnetic code. For small values of the magnetic dipole, the injected ions have large gyroradii compared to the scale length of the dipole field and are essentially unmagnetized. As a result, these ions expand, excluding the ambient magnetic field and plasma to form a diamagnetic cavity. However, for stronger magnetic dipoles, the ratio of the gyroradii of the injected ions to the dipole field scale length is small so that they remain magnetized, and hence trapped in the dipole field, as they expand. The trapping and expansion then lead to additional plasma currents and resulting magnetic fields that not only exclude the background field but also interact with the dipole field in a more complex manner that stretches the closed dipole field lines. A criterion to distinguish between the two regimes is derived and is then briefly discussed in the context of applying the results to the plasma sail scheme for the propulsion of small spacecraft in the solar wind.

  4. Novel Dipole Trapped Spheromak Configuration M. R. Brown,1,

    E-Print Network [OSTI]

    Brown, Michael R.

    Novel Dipole Trapped Spheromak Configuration M. R. Brown,1, * C. D. Cothran,1 J. Fung,1 M. J. Schaffer,2 and E. Belova3 We report the observation and characterization of a spheromak formed in the Swarthmore Spheromak Experiment (SSX) and trapped in a simple dipole magnetic field. The spheromak is studied

  5. Helium Catalyzed D-D Fusion in a Levitated Dipole

    E-Print Network [OSTI]

    instead of the magnetic shear and average good curvature. As a result, a dipole magnetic field can confinement. We find that a dipole based D-D power source can provide better utilization of magnetic field-D design w Plasma parameters w High Tc floating coil; neutronics, refrigeration ÿ Compare with DT tokamak

  6. Possible Constraints on Neutron Electric Dipole Moment from Pulsar Radiation

    E-Print Network [OSTI]

    C. Sivaram

    2010-02-12T23:59:59.000Z

    Even if only a small fraction of neutron dipole moments are aligned in a neutron star, observed pulsar radiation loses provide a stringent limit on the neutron electric dipole moment of <10-29 ecm, more stringent than best current experimental limits.

  7. Freely oriented portable superconducting magnet

    DOE Patents [OSTI]

    Schmierer, Eric N. (Los Alamos, NM); Prenger, F. Coyne (Los Alamos, NM); Hill, Dallas D. (Los Alamos, NM)

    2010-01-12T23:59:59.000Z

    A freely oriented portable superconducting magnet is disclosed. Coolant is supplied to the superconducting magnet from a repository separate from the magnet, enabling portability of the magnet. A plurality of support assemblies structurally anchor and thermally isolate the magnet within a thermal shield. A plurality of support assemblies structurally anchor and thermally isolate the thermal shield within a vacuum vessel. The support assemblies restrain movement of the magnet resulting from energizing and cooldown, as well as from changes in orientation, enabling the magnet to be freely orientable.

  8. Free-standing oxide superconducting articles

    DOE Patents [OSTI]

    Wu, X.D.; Muenchausen, R.E.

    1993-12-14T23:59:59.000Z

    A substrate-free, free-standing epitaxially oriented superconductive film including a layer of a template material and a layer of a ceramic superconducting material is provided together with a method of making such a substrate-free ceramic superconductive film by coating an etchable material with a template layer, coating the template layer with a layer of a ceramic superconductive material, coating the layer of ceramic superconductive material with a protective material, removing the etchable material by an appropriate means so that the etchable material is separated from a composite structure including the template layer.

  9. Few-Body Bound States of Dipole-Dipole Interacting Rydberg Atoms

    E-Print Network [OSTI]

    Martin Kiffner; Mingxia Huo; Wenhui Li; Dieter Jaksch

    2014-07-08T23:59:59.000Z

    We show that the resonant dipole-dipole interaction can give rise to bound states between two and three Rydberg atoms with non-overlapping electron clouds. The dimer and trimer states arise from avoided level crossings between states converging to different fine structure manifolds in the limit of separated atoms. We analyze the angular dependence of the potential wells, characterize the quantum dynamics in these potentials and discuss methods for their production and detection. Typical distances between the atoms are of the order of several micrometers which can be resolved in state-of-the-art experiments. The potential depths and typical oscillation frequencies are about one order of magnitude larger as compared to the dimer and trimer states investigated in [PRA $\\textbf{86}$ 031401(R) (2012)] and [PRL $\\textbf{111}$ 233003 (2014)], respectively. We find that the dimer and trimer molecules can be aligned with respect to the axis of a weak electric field.

  10. Electric Dipole Moments: A Global Analysis

    E-Print Network [OSTI]

    Timothy Chupp; Michael Ramsey-Musolf

    2014-07-03T23:59:59.000Z

    We perform a global analysis of searches for the permanent electric dipole moments (EDMs) of the neutron, neutral atoms, and molecules in terms of six leptonic, semileptonic, and nonleptonic interactions involving photons, electrons, pions, and nucleons. Translating the results into fundamental CP-violating effective interactions through dimension six involving Standard Model particles, we obtain rough lower bounds on the scale of beyond the Standard Model CP-violating interactions ranging from 1.5 TeV for the electron EDM to 1300 TeV for the nuclear spin-independent electron-quark interaction. We show that future measurements involving systems or combinations of systems with complementary sensitivities to the low-energy parameters may extend the mass reach by an order of magnitude or more.

  11. Electric Dipole Radiation from Spinning Dust Grains

    E-Print Network [OSTI]

    B. T. Draine; A. Lazarian

    1998-02-18T23:59:59.000Z

    We discuss the rotational excitation of small interstellar grains and the resulting electric dipole radiation from spinning dust. Attention is given to excitation and damping of rotation by: collisions with neutrals; collisions with ions; plasma drag; emission of infrared radiation; emission of microwave radiation; photoelectric emission; and formation of H_2 on the grain surface. We introduce dimensionless functions F and G which allow direct comparison of the contributions of different mechanisms to rotational drag and excitation. Emissivities are estimated for dust in different phases of the interstellar medium, including diffuse HI, warm HI, low-density photoionized gas, and cold molecular gas. Spinning dust grains can explain much, and perhaps all, of the 14-50 GHz background component recently observed in CBR studies. It should be possible to detect rotational emission from small grains by ground-based observations of molecular clouds.

  12. Superconducting flux flow digital circuits

    DOE Patents [OSTI]

    Hietala, V.M.; Martens, J.S.; Zipperian, T.E.

    1995-02-14T23:59:59.000Z

    A NOR/inverter logic gate circuit and a flip flop circuit implemented with superconducting flux flow transistors (SFFTs) are disclosed. Both circuits comprise two SFFTs with feedback lines. They have extremely low power dissipation, very high switching speeds, and the ability to interface between Josephson junction superconductor circuits and conventional microelectronics. 8 figs.

  13. Fractal Superconductivity near Localization Threshold

    E-Print Network [OSTI]

    Fominov, Yakov

    Fractal Superconductivity near Localization Threshold Mikhail Feigel'man Landau Institute, Moscow-electron states are extended but fractal and populate small fraction of the whole volume How BCS theory should be modified to account for eigenstates fractality ? #12;Mean-Field Eq. for Tc #12;#12;3D Anderson model: = 0

  14. Vacuum Technology for Superconducting Devices

    E-Print Network [OSTI]

    Chiggiato, P

    2014-01-01T23:59:59.000Z

    The basic notions of vacuum technology for superconducting applications are presented, with an emphasis on mass and heat transport in free molecular regimes. The working principles and practical details of turbomolecular pumps and cryopumps are introduced. The specific case of the Large Hadron Collider’s cryogenic vacuum system is briefly reviewed.

  15. D-zero rototrack: first stage of D-zero 2 Tesla solenoid field mapping device

    SciTech Connect (OSTI)

    Yamada, R.; Korienek, J.; Krider, J.; Lindenmeyer, C.; Miksa, D.; Miksa, R.

    1997-09-01T23:59:59.000Z

    A simple and portable field mapping device was developed at Fermilab and successfully used to test the D0 2 Tesla solenoid at Toshiba Works in Japan. A description of the mechanical structure, electric driving and control system, and software of the field mapping device is given. Four Hall probe elements of Group3 Digital Gaussmeters are mounted on the radial extension arm of a carriage, which is mounted on a central rotating beam. The system gives two dimensional motions (axial and rotational) to the Hall probes. To make the system compact and portable, we used a laptop computer with PCMCIA cards. For the control system we used commercially available software LabVIEW and Motion Toolbox, and for the data analysis we used Microsoft Excel.

  16. Numerical Analysis of Non-Uniformities and Anisotropy in High-Temperature Superconducting Coils

    E-Print Network [OSTI]

    Hu, Di; Ainslie, Mark D.; Zou, Jin; Cardwell, David A.

    2014-12-12T23:59:59.000Z

    , critical current density (superconductivity), high-temperature superconductors, numerical analysis, superconducting coils, transport ac loss....

  17. Superconducting Transitions in Wire Network under Spatially Modulated Magnetic Field

    E-Print Network [OSTI]

    Katsumoto, Shingo

    The nature of phase transition in artificially structured superconducting systems such as superconducting artificially structured superconducting systems]. Introduction of the checkerboard field with amplitude #12; to the Π1=2 case lifts the double degeneracy

  18. Superconducting Tunnel Junctions as Direct Detectors for Submillimeter Astronomy

    E-Print Network [OSTI]

    Superconducting Tunnel Junctions as Direct Detectors for Submillimeter Astronomy A Dissertation 2008 by John Daniel Teufel. All rights reserved. #12;Abstract Superconducting Tunnel Junctions on the of performance of superconducting tunnel junctions (STJ) as direct detectors for submillimeter radiation. Over

  19. Superconducting magnets for muon capture and phase rotation

    E-Print Network [OSTI]

    Green, M.A.

    2011-01-01T23:59:59.000Z

    LBNL-43998 SC-MAG-683 SUPERCONDUCTING MAGNETS FOR MUONDE-AC03-76SF00098. Green SUPERCONDUCTING MAGNETS FOR MUONet ai, "The Use of Superconducting Solenoids in a Muon

  20. anisotropic superconducting gap: Topics by E-print Network

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

    Research Laboratory of a spin-density wave SDW on s superconductivity in Fe-based superconduct- ors. We show that, contrary Vavilov, Maxim G 15 A Superconductive, Low Beta Single...