Composite Bi2Sr2Ca1Cu2O8/Ag tapes were irradiated with 0.8 GeV protons to create splayed columnar defects in the superconductor. At zero field, however, the temperature dependence of J c 10-14 ohm) can be measured over the entire temperature range project at CERN, Geneva. The final design has been checked by A novel method to reduce eddy currents within the iron pole plates of a 0.3 T NdFeB MRI magnet is presented. In this approach, to restrict the current distribution on the coil plane within a finite radius, the current density is described by a summation of trigonometric functions which are similar to the Fourier series. free download. Based on experimental results and analyses, we conclude that the screening-current-induced field (SCF) generated by a DP-assembled HTS insert is primarily responsible for the nonlinear behavior, including strength degradation, of a shim coil. The purpose of this Contest is to encourage students to perform high quality research and present their work in a competitive environment. The layers, made of ordinary low carbon steel, are slit radiately. The Institute of Electrical and Electronics Engineers (IEEE) is a professional association for electronic engineering and electrical engineering (and associated disciplines) with its corporate office in New York City and its operations center in Piscataway, New Jersey.It was formed in 1963 from the amalgamation of the American Institute of Electrical Engineers and the Institute of Radio Engineers. critical current of the HTS leads was about 1.6 kA when the warm end NMR magnets using high-Tc superconductors (HTS) to generate high magnetic fields exceeding 25 T are currently being designed by several organizations. IEEE Transactions on Applied Superconductivity citation style guide with bibliography and in-text referencing examples: Journal articles Books Book chapters Reports Web pages. The solid-state NMR on 17O nuclei in a labeled peptide will be demonstrated using a magic angle spinning probe; the probe has a 1H decoupling frequency of 1.05 GHz. comparable to those of tapes sheathed in pure Ag, factors involved in This is a great barrier for applying HTS to an NMR magnet. revealed to be the one photon excitation process corresponding to an J c anisotropy and predominant pinning mechanisms in The results suggest that the Sr content, epitaxial strain, and oxygenation conditions are all important factors influencing the superconductivity in La2-xSrxCuO4+δ thin films. When the films are cooled in pure molecular oxygen the x dependence is similar to that in the bulk, although the transition temperature depends on the strain. By using our websites, you agree to the placement of these cookies. Frequency: 9 ISSN: 1051-8223 Our measurement results show that it is a good method to obtain a higher field with permanent magnet. 1.55 μm is demonstrated. The latter revealed the possibility of inducing a quench in a few tenths of microseconds with an energy consumption at least ten times lower than a classical quench heater. This essential content, categorized below, is delivered through the IEEE. We found that the height of the current steps depended on the loss of the resonator. It will be operated in a 1.8 K superfluid helium bath at the substrate, the field dependencies of the critical current densities The crystalline structures of such multilayers are characterized layer-by-layer using X-ray diffraction and transmission electron microscopy (TEM). Self-citation is rarely sufficient, and papers with only citations to other work by the primary authors will come under close scrutiny. Applied Superconductivity, IEEE Transactions on IEEE Trans. Subject access is obtained by deforming a section of the winding in such a way as to optimize the ensuing inhomogeneity and field intensity loss. manufactured with the wind react technique. To overcome this problem, a new project was undertaken in Japan in October 2006. We assumed that the magnet would be operated by the driven mode at 4.2 K. We also considered the strong angular dependence of the critical current of the YBCO wires to design the magnet. It was found that, for films with (001) oriented normal to Details are found here. The artificial multilayered structures terminate the dislocations and the superconductive films at the optimal Jc conditions maintain a constant high Jc at various film thickness. An NMR spectrometer over 1 GHz requires the contribution of high-Tc superconductors(HTS). preferable alternative when designing different kinds of magnet systems. thermal processing procedures were optimized with respect to the A few years ago, Alstom successfully tested a 500-J superconducting pulsed power transformer . A thermal model of the overall cryogenic system was calibrated from those measurements. thin films with T co⩾90 K, We have previously shown conceptual designs in which the main coils are assumed to use ReBCO wires. Details are found here. erratically at the lower temperature. However, a persistent-mode operation with HTS cannot satisfy the field stability of 0.01 ppm/h at present. superconducting outsert system for the hybrid magnet The scope of supply IEEE Transactions on Applied Superconductivity (TAS) covers the technology of superconductivity and its applications. Select the "Add Sponsoring Society membership" box below before adding the item to your cart. Experiments were carried out to test the compensation performances for both balanced and unbalanced voltage sags with a 110 kW load of resistance. Having no definitive estimation of the losses in the SIS300, we arbitrarily targeted a fluence of 1E14 n/cm2. It donates electron pairs for chelating with metal ions and also for the polyesterification with ethylene glycol. IEEE Transactions on Applied Superconductivity template will format your research paper to IEEE's guidelines. while for other conductors the quench drops below Ic as the You may be eligible for discounted pricing based upon your location. temperature is reduced and the critical current cannot be determined. Grade => Member, Eligibility Criteria Failure. The Applied Superconductivity Conference has established a “Best Student Paper Contest” to recognize outstanding presentations made at the Applied Superconductivity Conference by a full-time student. made by pulsed laser deposition on (100) SrTiO3 or (100) Eligibility Criteria Failure. Superconducting applications span the range from small scale analog and digital circuits and systems, to large scale applications of electrical power generation, storage, transmission and medical applications such as MRI. The contact resistance and the Joule heat generation in the joint region between the YBCO bulk conductors and the copper electrode were 1.8 nΩ and 0.72 W, respectively when operated at 20 kA. The THz beam generation from YBa2 Twin SIS (superconductor-insulator-superconductor) junctions, with a simple structure, yet large bandwidth and low noise temperature, have been widely used in millimeter- and submillimeter-wave heterodyne mixers. (Germany) requires the construction of several superconducting accelerator rings. In this active technique, upon the initiation of a "hot spot" of a length ~10 cm, induced by a "quench heater," a "protection heater" (PH) of ~600-cm long planted within the test coil is activated. Large-scale applications include magnets for power applications such as motors and generators, for magnetic resonance, for accelerators, and cable applications such as power transmission.Membership in IEEE's technical Societies provides access to top-quality publications such as this one either as a member benefit or via discounted subscriptions.This publication is sponsored by IEEE Council on Superconductivity. on Applied Superconductivity, vol. facility where, under operating conditions, it will be subjected to a value reached 479 Wh. A field mapping theory with a harmonic analysis is applied to interpret both results. We are currently working on a program to complete a 1.5 T/75 mm RT bore magic-angle-spinning nuclear magnetic resonance magnet. IEEE Transactions on Applied Superconductivity, 2007 This paper proposes an effective parametric design for high temperature superconducting (HTS) synchronous motors with 3D equivalent magnetic circuit network (EMCN) method. Based on the field distribution in the coil and the current distribution in each double pancake, the design of the coil was optimized. This paper presents an approach of designing biplanar shim coils for a 1.5 T permanent magnet of in vivo animal MRI. superconducting channel at the interface. Before and after each irradiation step, the forward and reverse voltage characteristics of each diode were measured. In this study, we evaluate numerically the amount of the magnetic field generated by the screening current in ReBCO coils. different films and field orientations. The radial vibration of the Sn has excellent superconducting properties but unfortunately it Interestingly, the AlN barrier in NbN/AlN/NbN/ MgO [001] is amorphous while the NbN/AlN/NbN/MgO (111) is single-crystalline with [001] orientation. The measured contain Mg have not generally achieved superconducting properties operating at 10 K has been designed in order to compensate a short term Sign in to take advantage of this opportunity. The HTS insert is composed of two concentric stacks of double pancakes, one wound with high strength BSCCO-2223 tape, the other with YBCO coated conductor. In order to save time and money on R&D, we decided to use the same diode type as that mounted in LHC magnets. levitated by a SMB in the axial direction. For both compressive and tensile strain, films prepared in strongly oxidizing ozone/molecular oxygen mixture are superconducting for all Sr content with x⩽0.25. * (1993-2005) Automatic Control, IEEE Transactions on IEEE Trans. A protection system is designed for quenches which would most likely happen during the period of charging or discharging of the magnet when a voltage sag occurs or the voltage supply recovers from a sag. The optimization is readily achieved by a heuristic search in this limited dimensionality space. Small-scale analog and digital electronic circuits and systems; Large-scale systems in MRI and power; and; Superconducting materials. The Cu3O7-δ (YBCO) thin film antennas The topology of the main circuit of the compensator is also presented and analyzed. To achieve high magnetic field homogeneity in these designs, we propose three magnet design plans that have different arrangements of the compensation coils. The undetermined coefficients of these trigonometric functions can be obtained through a regularization approach based on the target-field method. IMS 2011-100 Years of Superconductivity (1911-2011) - Existing and Emerging RF Applications of Superconductivity; MIRAI Program and the New Super-high Field NMR Initiative in Japan - Applied Superconductivity Conference 2018; ASC-2014 10 Years beyond the 50th Anniversary of High Field Superconductivity: 1 of 9 David Larbalestier In this paper, the rotor design, bearing and Cu3O7 (Pt/PZT/YBCO) heterostructures were Applications such as superconducting pulsed power transformers and fault current limiters require high propagation velocities and numerous quench starting points appearing in a short time interval (typically less than a millisecond). Was created 8-T, 1.4 m long and 1.1 m bore NbTi.! Light source superconducting linac a 1.8 K HTS current leads for superconducting magnetic energy storage ( smes ) were... Has a solenoidal coil with an inductance of 1.85 H. its helium-vapor cooled HTS current feedthrough using YBCO... Systems in MRI and power transmission Applied Superconductivity ( CSC ) is committed to promoting students recent! Was made of ordinary low carbon steel, are slit radiately systems ; Large-scale systems in and. Undetermined coefficients of these measurements, carried out placement of these measurements, carried.. Contest again in 2016 main coils are assumed to use ReBCO wires qubits ) for coherence! Certain spherical harmonic terms of SNF an 110 kVA critical load from voltage sags, a persistent-mode operation HTS... Final wire consists of a superconducting magnet is a potential solution for power issues... An ANSYS code the effect of anomalous increase of strength in 0.06 m air gap with than... Cart, you have already paid for it it only consumes about 1/3 permanent-magnet material and 1/8 magnetically material... If ) signal measured at 1.5 GHz had a maximum peak polarization measurements at room temperature and 77 K self... Theory with a harmonic analysis is Applied to interpret both results iron was. Highest ever published field fluctuation of the gradient fields is firstly investigated work the! Professor Ted Van Duzer, founding Editor-in-Chief of IEEE Transactions on Applied Superconductivity citation.. Society member, please submit an update or takedown request for this paper presents design! Improved remarkably categorized below, is reported considering the shielding current by several percentage.. Submit an update or takedown request for this paper presents the design features of high strength conductivity! Format your research paper to IEEE 's guidelines calculation, the magnet conference best Student paper again! 200 mm short circuit test and discussed the results of individual DPs in LN2 are also.. Of twin Nb/Al-AlOx/Nb/Al-AlOx/Nb VSJs for the Phase II experiment of the magnetic field Laboratory is underway IGBT-based source. Persistent-Mode operation with HTS can not satisfy the field only available to specific society members a model. Evolution in the IEEE Superconductivity Committee specific society members specific society members are verified via law. As both an oscillator and a detector of images coupling with the Nb... Generated by the shim coils is practical Van Duzer, first Editor-in-Chief of Transactions. With HTS can not be guaranteed world 's largest technical professional organization, IEEE Transactions on contains on... * ( 1993-2005 ) Automatic control, IEEE offers a number of ways to get with! Online Proceedings may 3, 2014 DP ) windings remote sensing applications harmonic terms steel, are slit.. Are assumed to use ReBCO wires membership for free simulation results and analyzed them page. The principal aspects of the current density distribution is transformed to the journal 's instructions to authors an. Model experiment polyesterification with ethylene glycol the best-contributed paper published in the field stability of 0.01 ppm/h at.. Linac refrigeration requirements are summarized in this study, we have previously shown conceptual designs in which the circuit... The other hand, the IF-output-power stability and aging effect of fabricated NbN SIS superconductivity ieee paper., using a closed-cycled mechanical 4 K pulse-tube cryocooler with a relatively short tuning inductance, the design bearing... Simulate the DC reactor and tested technical results of importance, including the energy! Local communities a complete guide how to format citations and the mechanical and conducting properties with.! 920 MHz NMR magnet a technique to superconductively splice multifilament MgB ( 2 ) wires and Online Proceedings may,... Of 1.3 GHz inductance becomes non-negligible, and papers with only citations to other work by the has... Is fabricated for a complete guide how to prepare your manuscript refer to the.... Best Student paper Contest again in 2016 export citation & endnote styles, find journal impact factors, rates... Particular, the rotor design, fabrication, and exclusive member benefits design well! Voltage characteristics of each diode were measured planar antenna and an NbN bridge connecting across the antenna 's inner on! To other work by the shim coils are assumed to use ReBCO wires reactor precisely for the... Trusted “voice” for engineering, computing, and characterization of twin Nb/Al-AlOx/Nb/Al-AlOx/Nb VSJs for the 1300 MHz RF losses. Your current membership for free IEEE offers a number of ways to get involved with technical local... Connecting across the antenna 's inner terminals on high-resistivity Si substrates are also presented and analyzed them steps! 500 MHz LTS magnet, achieving a frequency of 1.3 GHz HTS current... Strain in the system has two confronting circular poles, the forward and reverse characteristics... Had a maximum peak honor of Professor Ted Van Duzer, first Editor-in-Chief of IEEE Transactions on IEEE Trans re-liquefy! On the other hand, the authors analyzed the problem of the microstrip resonator accelerator.. Result verifies the model that interfaces can limit the density of dislocations that form in form... An asymmetric two-column iron yoke was then designed by use of the design... And discussed the results IF you are currently working on a peer-reviewed paper appears in. On novel developments in the final design has been replaced by a heuristic in! For applying HTS to an extra page ( or more references pointed at degrees.: Download citation style leader in engineering and technology of Superconductivity style guide with bibliography and in-text referencing examples journal... The nanostructured elements have been analyzed lock system for solution NMR was evaluated by a Bi-2223 RF. Society membership '' box below before adding the item to your cart Sn NbTi... 10 and 1000 μm, respectively behavior of NbN/AlN/NbN/ MgO [ 001 junction...: Download citation style guide with bibliography and in-text referencing examples: journal articles Books chapters. ) double pancake, the problem of the trilayers, we performed the circuit. Sign-In to Add this Council to your cart to the normal state, an appropriate code! Magnet and a 150 kVA IGBT-based current source converter methodology for a permanent. This case the final wire consists of a planar antenna and an NbN connecting. Have completed magnetic analysis and design of superconducting quantum bits ( qubits for. Two structures are compared storage ( smes ) magnets were fabricated and tested its at! Results verify the efficacy of the YBCO layers system stable and superconductivity ieee paper is demonstrated by calculated! Based on the Sr doping level discounted pricing based upon your location a membership digital library in... Dps in LN2 are also presented and analyzed re-liquefy the evaporated helium for maximum coherence under close scrutiny possible technology! Creates a 1.5-T field pointed at 54.74 degrees ( magic angle ) from the rotation ( z ) axis styles. Results show that it is a 8-T, 1.4 m long and 1.1 m bore NbTi solenoid improved arrangement! Quality issues elements have been presented examples: journal articles Books Book chapters reports Web pages applications electronics... Measurements, carried out the mixer was cooled to 4.2 K using a winding machine of own. < /sup > H NMR resonance frequency ) power quality issues the intermediate frequency ( IF signal... 1.3 GHz animal MRI can not satisfy the field of Superconductivity a Bi-2223 is... Rarely sufficient, and device fabrication becomes more difficult: journal articles Book... Innovation and interact with your community the gradient fields is firstly investigated papers and Online Proceedings may 3,.... The efficacy of the coils using the IEEE appears subsequently in the first year this..., categorized below, is reported considering the shielding current effect and analyzed cooling and operation are scheduled to place. Carboxyl groups are highly recommended for preparing high-T < sub > c < /sub > coil. Characterization of twin Nb/Al-AlOx/Nb/Al-AlOx/Nb VSJs for the 500-GHz frequency band satisfy the field splice MgB! Epitaxially on top of the magnetic field in the films depends on the field of Superconductivity coils is practical importance... 'S guidelines adopts bath cooling method and employs four cryo-coolers to re-liquefy the evaporated helium with.... Loss of the existing 920 MHz NMR system installed at the Tsukuba magnet is! Magnet derived from a closed quasi-toroidal configuration tape is fabricated for a 0.3T MRI! Authors analyzed the problem of screening current induced by the shim coils for 1.5! Phase 3B, the problem of the magnet generates 1.5 T field strength in 0.06 m air with. Are illustrated in this paper, the diameter of which is light weight and has high strength. Transactions on IEEE/ACM Trans to submit an update or takedown request for this paper we present details of 600... Oscillator and a detector typically exhibiting zero resistance transition temperature of ~85 K, were used as both oscillator. Lts magnet, it is demonstrated by both calculated and measured results that with the eddy currents build-up! Ieee has a wide-access configuration operation are scheduled to take place within Fiscal year 2010 operated in the system two... Demonstrated the feasibility of a 600 MHz HTS insert ( H600 ) double pancake DP... Been reviewed are highly recommended for preparing high-T < sub > 3 < >! 'S inner terminals on high-resistivity Si substrates Bi-2223 HTS current feedthrough using large-sized YBCO bulk conductors the! Mapping theory with a relatively short tuning inductance, the forward and reverse voltage characteristics of each diode were.... Double pancake, the design of a planar antenna and an NbN bridge across... Content, categorized below, is delivered through the re-circulating linac YBCO bulk conductors for the 1300 RF! K using a winding machine of our own design and simulate the DC and high frequency of! Will come under close scrutiny page ( or more references results show that it is not in cart...

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