Coil Fabrication Status at Fermilab Fred Nobrega March

Coil Fabrication Status at Fermilab Fred Nobrega March 25, 2020 Coil Working Group Meeting

§ § Cable is in quarantine due to tensioner issue with the Selva winding machine. Jerk in tensioner cause easy way bend of cable to about the same radius of curvature as the inner layer pole winding key. Strands came out of lay and later repaired. Insulation removed to inspect strands for damage; none was found. The cable was repaired and insulated Selva repaired and is using quarantined cable to re -commission winding machine. Cured coil will be stored as quarantined coil and dispositioned at some future date. Layer 1 winding has begun. The wedges are installed and 8 turns remain before coil curing. QXFA 120 Coil WG Mtg, March 25, 2020 — Coil Fabrication Status at Fermilab 2

QXFA 121 § The coil is epoxy impregnated and at inspection for CMM. § The coil is quarantined. The L 2 reacted lead was displaced 10 -20 mm along the surface of the mid-plane shim during lead soldering prep. § Test samples will be made and analyzed to help quantify cable degradation if any. § Disposition of coil will be made after the analysis is complete. Coil WG Mtg, March 25, 2020 — Coil Fabrication Status at Fermilab 3

Coil Fabrication Status at Fermilab § QXFA 122 § Soldering of power leads has started as part of the coil impregnation prep. § Winding mandrels were re-assembled with shims to straighten and used on this coil. § Final inspection with CMM may determine if the winding mandrel is the cause of the keyway shift. § QXFA 123 – The reaction cycle started on Friday March 20 then later that evening it was safely stopped during the ramp up to 210° C due the implementation of the Modified Min Safe Plan at Fermilab. The coil tooling temperature was 76° C. A DR was written and dispositioned with details of how to resume upon our return to Fermilab. § QXFA 124 winding prep is complete. Coil winding on the rotating table is next. § QXFP 03 & QXFP 04 – The P. O. is nearly ready to be placed for Tg analysis of the coils and other samples. Sectioning coils and harvesting test samples is next. § We used 2 m separation on the production floor for a week prior to the closing of Fermilab. Additional guidance was recently provided to use a HA with appropriate PPE if a task requires less than 2 m separation. It is reasonable to assume this approach will be used upon our return to Fermilab. Coil WG Mtg, March 25, 2020 — Coil Fabrication Status at Fermilab 4