Agenda Project Office updates Closeout slides of the

Agenda • Project Office updates • Close-out slides of the Review of HL-LHC IT Quads at CERN • Report of Pre-Series magnets PRR • MQXFAP 1 b set screw torque check • MQXFAP 1 b disassembly at BNL • Plans for T_g measurements • Reports from L 3 s • AOB G. Ambrosio 12/20/2021 1

https: //indico. cern. ch/event/828604/timetable/#20190715 G. Ambrosio 12/20/2021 2

Status of Program: Production Tooling, finalization of design and procurement Components procurement, status and plans • Findings • Production tooling design and procurement is progressing reasonably • Component procurement is progressing as planned • Comments • The financial failure of one vendor has caused a delay in the delivery of production parts. The actions taken to address this issue were reasonable. • Durability of the plasma coating on parts at the coil ends is an issue • Recommendations • Reconsider whether plasma-coated end parts are a technical necessity 3

Status of Program: Risk registry and mitigation measures • Findings • Risk management is approached somewhat differently by the US and CERN teams • Both the US and CERN teams have robust and mature risk management plans • Comments • Some issues need to be resolved on the US side before CD-3, for example: • Acceptance Criteria • Number of pre-series magnets • Recommendations • None 4

Other Issues • Assess the long-term stability of the quench heaters including epoxy impregnation issues (elimination of bubbles and dry spots) • We recommend that no magnets be rejected if they achieve nominal field + margin (% TBD), but not ultimate field • Quench Protection: • Magnets can be safely protected with either 8 QH or with 1 CLIQ • CLIQ firing circuit has 2 x redundancy • Above 3 k. A: If any number of QH fail, the magnet will be protected by CLIQ • If CLIQ fails, further analysis of the protection by QH is required a It is critical to validate the assumptions and model (including scatter in coil properties) utilized in the simulation. 5

Agenda • Project Office updates • Close-out slides of the Review of HL-LHC IT Quads at CERN • Report of Pre-Series magnets PRR • MQXFAP 1 b set screw torque check • MQXFAP 1 b disassembly at BNL • Plans for T_g measurements • Reports from L 3 s • AOB G. Ambrosio 12/20/2021 6

GOALS for T_g measurements 1. Verify if there is correlation btw glass transition temperature (T_g) and coil quench performance By measurement of T_g (average and spread) in coil S 08 (good quench perf. ) and coil P 3 (poor quench perf. In MQXFAP 1 b) G. Ambrosio 12/20/2021 7

MQXFS 03 QH 20 A/s at 4. 5 K 100 -200 A/s at 1. 9 K G. Ambrosio 12/20/2021 8

GOALS for T_g measurements 2. Assess T_g distribution along MQXF coils and compare with vendor nominal value Coil S 08: 3 locations (near LE, center, near RE) Coil P 03: 7 locations Control sample (2 -cable stack): 1 G. Ambrosio 12/20/2021 9

GOALS for T_g measurements 3. Assess correlation btw DMA (dynamic mechanical analysis) and DSC (differential scanning calorimetry) for planning production tests Note: DMA requires large samples, therefore only DSC may be performed on production coils with present tooling G. Ambrosio 12/20/2021 10

• DMA Test Dynamic Mechanical Analysis (DMA) tests will be performed on supplied 2 x 2 stack samples fabricated at FNAL per ASTM D 7028 to determine the glass transition and stiffness properties. A “standard” sample along with eight additional samples taken from coils manufactured at FNAL will be tested. For reference, DMA specimens should nominally be 2. 25 in. L x 0. 47 in. W x 0. 1 to 0. 125 in. thick. Specimens will be tested using a 3 -point bend method. Tests will be performed from 20°C to +200°C at a rate of 5°C/min. Data deliverables will include tabular and graphical representation of the storage modulus, loss modulus, and the Tan Delta versus temperature, as well as the glass transition temperature (Tg). • DSC Test Differential Scanning Calorimetry (DSC) tests will be performed on supplied material specimens per ASTM D 7426 to determine the glass transition and extent of cure properties. Any sized sample weighing more than 5 grams can be used for this test and eight samples will be extracted and tested by CTD from coil sections supplied by FNAL. Tests will be performed from 20°C to +300°C. Data deliverables will include tabular and graphical representation of the heat flow vs. temperature, the residual heat of reaction, the glass transition temperature (Tg), and the extent of cure. G. Ambrosio 12/20/2021 11

Plans • Phase 1: prepare and test S 08 and control samples ASAP, in order to debug procedures • Phase 2: prepare and test P 3 samples as soon as coil P 3 becomes available DMA DSC Coil S 08 3 3 Coil P 3 7 7 2 -cable stack 1 1 Total 11 11 G. Ambrosio 12/20/2021 12

MQXFA Fabrication L 3 updates • • Hi. Lumi – Gian. Luca Conductor – Lance, Vito Cables – Ian, Charlie Coil parts – Miao Coils at FNAL – Fred Coils at BNL – Jesse, Mike QXF Structure – Soren, Dan G. Ambrosio 12/20/2021 13