1 / 8

HTS Insert Coil Test in External Solenoid Field

HTS Insert Coil Test in External Solenoid Field. Emanuela Barzi. All Experimenters’ Meeting, July 11, 2011. Motivation of R&D. High Temperature Superconductors (HTS) are of interest for Muon Collider and/or Neutrino Factory accelerator magnets

ardith
Download Presentation

HTS Insert Coil Test in External Solenoid Field

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. HTS Insert Coil Test in External Solenoid Field EmanuelaBarzi All Experimenters’ Meeting, July 11, 2011

  2. Motivation of R&D • High Temperature Superconductors (HTS) are of interest for Muon Collider and/or Neutrino Factory accelerator magnets • The muons initially occupy a large 6D phase space, which must be cooled by a factor O(106). In the muon ionization cooling channel designs, the muons are confined within a lattice of high-field solenoids. The square-root of the final transverse emittance that is achievable is inversely proportional to the solenoid field at the end of the channel. The achievable luminosity in the collider is therefore proportional to this solenoid field, up to fields of about 50 T, beyond which the beam-beam tune shift is expected to limit the luminosity.

  3. Why HTS? “Angular Measurements of HTS Critical Current for High Field Solenoids”, D. Turrioni et al.. Advances in Cryogenic Engineering, V. 54, AIP, V. 986, pp. 451-458 (2008). “Study of HTS Wires at High Magnetic Fields” , D. Turrioni, E. Barzi, M. J. Lamm, R. Yamada, A. V. Zlobin, A. Kikuchi . IEEE Trans. On Appl. Superconductivity 19, No 3, Part 3, 3057-3060 (2009).

  4. HTS Work Directions 1. Magnet design studies - Since 2007, A. Zlobin, V. V. Kashikhin, E. Barzi, E. Terzini • “Study of High Field Superconducting Solenoids for Muon Beam Cooling”, V. V. Kashikhin et al.. IEEE Trans. Appl. Sup., V. 18, No. 2, p. 928 (2008). • “Towards 50T Solenoids”, E. Barzi- https://indico.fnal.gov/conferenceDisplay.py?confId=3148. • Analytical Study of Stress State in HTS Solenoids – Stress distribution in a solenoid was studied for various constraint configurations, max. stresses were produced as a function of coil self-field, and results compared with Finite Element Models. E Terzini, E. Barzi, FERMILAB-TM-2448-TD. 2. HTS Conductor R&D – Ongoing since 2005, E. Barzi, L. Del Frate, V. Lombardo, D. Turrioni • Conductor characterization – Studies of Je as a function of B, T, angle, and bending, longitudinal and transverse strains. • BSCCO-2212 cable development. • YBCO Roebelcable. 3. Insert Coil Development – Since 2008, E. Barzi, G. Norcia, A. Bartalesi, A. Cattabiani, G. Gallo, V. Lombardo • Winding methods and tooling, impregnation techniques, splicing procedures, R&D on thermally conductive insulation. • Development of modular test setup. • Magnetic models for insert and background field were developed to calculate short sample limits of insert coils. • Co-wound and impregnated YBCO coil were represented by meso-mechanic models. A. Bartalesi, FERMILAB-MASTERS-2009-04. • Insert Coil Test – Since 2009, D. Turrioni, P. Vicini, V. Lombardo • Development of instrumentation, DAQ, quench protection and detection systems for insert coil tests. Test pancake assemblies in 14 T/77 mm bore existing magnet and provide feedback to coil technology development.

  5. Double-Pancake Units

  6. Modular Insert Test Setup Modular Insert Test Facility 14 T solenoid with 77 mm bore Modular Test Facility for HTS Insert Coils”, V. Lombardo, A. Bartalesi, E. Barzi, M. Lamm, D. Turrioni and A.V. Zlobin”. IEEE Trans. Appl. Sup., V. 20, No. 3, p. 587 (2010). Coil1 Coil2 Coil3 Coil4

  7. Result - 21.2 T with 14 T Bkg. Field YBCO Insert Coil External Magnet

  8. What Next? • This insert coil produced 7.5 T in a 14 T background field (about 9 T at self-field). • This is an intermediate result with respect to our final goal. To develop a technology for 35 T+ solenoid, we need to double (~15 T) the field of the HTS insert in a background field of ~ 20 T provided by Nb3Sn/ NbTi hybrid coils.

More Related