1 / 6

Pier Paolo Granieri, TE-CRG

Collimation Upgrade Specification Meeting #35 21 st March, 2014. Pier Paolo Granieri, TE-CRG. S teady -state cable quench limits of the 11 T dipole. Roadmap. Today’s presentation , using available data. Steady-state quench limits can be a conservative limit.

faith
Download Presentation

Pier Paolo Granieri, TE-CRG

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. Collimation Upgrade Specification Meeting #35 21st March, 2014 Pier Paolo Granieri, TE-CRG Steady-state cablequench limits of the 11 T dipole

  2. Roadmap Today’spresentation, usingavailable data Steady-statequenchlimits • canbe a conservative limit by means of simulation codes: Transientquenchlimits P.P. Granieri – Steady-state cablequenchlimits of the 11 T dipole Experimentalmeasurements of steady-stateheat extraction

  3. Steady-state heat extraction Tc (mid-plane, cable center) Tc (mid-plane, cableedge) Different position in the cable, Tbath, heating configuration : N.B. Heattransfermechanisms in Nb3Sn coils are muchsimplerthan in the current LHC Nb-Ticoils P.P. Granieri – Steady-state cablequenchlimits of the 11 T dipole Measurementsperformed in 2012, for the Nb3Sn MQXF magnet • differentelectricalinsulation, w/o mica glass • unreactedcable (effects on fiberglass thermal conductivity ?)

  4. Steady-statecablequenchlimits P.P. Granieri – Steady-state cablequenchlimits of the 11 T dipole Calculatedassuming the followinghypotheses: • nominal operating conditions • availableheattransfer data (MQXF, seeprevious slide) • fieldmap of the 11 T 1-in-1 demonstrator (around 10% optimistic)

  5. Follow-up To beperformedusing the 11 T (reacted) cable-typenextdays Steady-statequenchlimits • canbe a conservative limit by means of simulation codes: Transientquenchlimits P.P. Granieri – Steady-state cablequenchlimits of the 11 T dipole Experimentalmeasurements of steady-stateheat extraction

  6. Conclusion P.P. Granieri – Steady-state cablequenchlimits of the 11 T dipole • Steady-stateheat extraction determined for a Nb3Sn cable, similar but not equal to the 11 T one • Withthisassumption, cablequenchlimitaround110 mW/cm3 • steady-state (conservative, 20% ?) • uniformheatdeposit over cable cross-section • Measurement of the actual 11 T cablesoonavailable  update of the quenchlimitcalculation

More Related