Dixon I.R.,Florida State University |
Affinito L.,ENEA |
Bird M.D.,Florida State University |
Della Corte A.,ENEA |
And 6 more authors.
IEEE Transactions on Applied Superconductivity | Year: 2012
The outsert coils of the Series-Connected Hybrid magnets for the National High Magnetic Field Laboratory and Helmholtz Zentrum Berlin each contain approximately 4000 kg of Nb3Sn/Cu cable-in-conduit conductor (CICC). There are three different sizes of CICC that grades the amount of superconductor. Significant progress has been made in all aspects of the CICC fabrication. The Nb3Sn strand, consisting of high J\rm C RRP Nb3Sn, and conduit, composed of 316 LN with critical chemistry modifications, have been manufactured and quality control measurements made. The additional service to create the ten lengths of superconducting and three lengths of prototype, multi-stage twisted Cu cable is also complete. Jacketing of the cables has successfully been carried out at a new facility (subset of ICAS) for the insertion and compaction of fusion technology CICC using a weld and pull method. Fabrication processes and quality controls have been developed through a collaborative effort between the NHMFL, HZB, Criotec Impianti, and ENEA Superconductivity Division. © 2011 IEEE.
Frattolillo A.,ENEA |
Bombarda F.,ENEA |
Migliori S.,ENEA |
Podda S.,ENEA |
And 10 more authors.
Proceedings - Symposium on Fusion Engineering | Year: 2011
The control of the density profile during the initial plasma current rise is a critical issue to optimize ohmic and fusion heating rates of Ignitor plasmas. Simulations performed with the NGS ablation model, for the reference ignition plasma parameters (ne0 ≅ ni0 ≅ 10 21 m-3, Te0 ≅ Ti0 ≅ 11 keV), indicate that deuterium pellets of a few mm (≤ 4 mm) in size injected at 3-4 km/s from the low field side should ensure adequate deep fuelling. © 2011 IEEE.
De Salve M.,Polytechnic University of Turin |
Milani D.,CRIOTEC Impianti |
Panella B.,Polytechnic University of Turin |
Roveta G.,CRIOTEC Impianti
International Journal of Air-Conditioning and Refrigeration | Year: 2015
A prototype gas liquefaction plant has been designed and manufactured for Politecnico di Torino cryogenic laboratory and has been used for cryogenic applications like superconducting cables and low temperature refrigeration devices. The plant is able to liquefy nitrogen and, by means of little changes, hydrogen and other cryogenic fluids too. The thermal energy is removed by four high speed (up to 360 000 revolutions per minute) helium turbines that are connected in series. The gas liquefaction is carried out by the cooling condensation process of the gas flow that feeds a 0.15 m 3 super insulated tank that is cooled inside. The cryogenic system is based on the Claude and Collins cycles, fed with helium that provides the cold sink. The paper shows the characteristics of the plant main components, and the time history of the measured temperatures, pressures, and flow rates during the plant start-up, as well as the steady state liquefied gas production rate. From the energetic point of view, the plant performance is acceptable for a research laboratory and the plant efficiency is not far from that of commercial larger size plants. © 2015 World Scientific Publishing Company.