Coil Fabrication Status Miao Yu 04192018 Coil Working

Coil Fabrication Status Miao Yu 04/19/2018 Coil Working Group Meeting

General Fabrication Status 2 nd Gen. W&C Reaction Impregnation Inspection QXFA 101102, 104 -106 Status @LBNL Assembly QXFA 107 √ √ √ QXFA 108 √ √ Prep. QXFA 109 √ Prep. QXFA 110 Waiting for approved MIP by CERN √ MQXFA 2: 101 (cable to OL RE Saddle short 10 MΩ resistance at 10 V, OL-IL RE saddles short) 102, 104, 105 and 106 MQXFA 3: Pre-series • 107 -110 (107 cable to OL RE Saddle short, 125 kΩ resistance at 20 V) • 202 or 203 from BNL logo area 2

CTD 1202 during long coil curing 2 hrs curing at 150 deg. C QXFP 1 a to QXFP 5 (May 2015 to Jun. 2016) Good bonding QXFA 101 to 109 (Jul. , 2016 to now) Locally separated: L 1 and L 2, lead turn, multi turns from last conductor group Procurement record: • 2 kits, Jun. 2015: three parts kit • In July 2015, CTD switched to two parts kit • At least 12 kits were procured since then. logo area 3

Findings 1. CTD reviewed the raw material from the supplier in January 2016, and found that the composite was different, and after verification test on the mixed binder, the results met all CTD specs, so there was no further investigation. 2. The final product after 550 °C heat treatment remains the same, however the bonding effect during green curing is different. 3. It is very difficult to obtain the formula from the original CTD 1202, because CTD Inc. do not have any original binder. 4. To cure faster, CTD Inc. changed the catalyst from the high temperature catalyst in Part A to room temperature catalyst, designated it as CTD 1290. logo area 4

Actions Fermilab § Send the presentation to CTD § Provide CTD our recipes (turn at the coil ends curing and the whole coil curing) § 10 -stack measurement using CTD 1202 and 1290 § Continue using CTD 1202 and modify the saddles (adding slits and rounding the tips) CTD, Inc. § Investigate on CTD 1202 using Fermilab recipes § Send a quote and schedule for R&D program to investigate the formula of the original CTD 1202. logo area 5

Saddle Modification logo area