1. Material for Crab cavities ordered and foreseen S. Langeslag & P. Freijedo Menendez Material summarized in https://edms.cern.ch/document/1549318/1 https://edms.cern.ch/document/1549318/1

2. Material summary (Ti-grade2) ITEMDimensions [mm] Ordered [n o ] Received [n o ] Comments Ti Gr.2 for helium tank 575 x 390 x 25 22 Machining at GRAEVEN; 452 x 390 x 25 22 570 x 484 x 30 22 Ø165 x 35 22 Ø215 x 35 11 Ø173 x 35 11 Ti Gr.2 for spare helium tank 575 x 390 x 25 22 Ultrasonic test performed at CERN, results OK 452 x 390 x 25 22 570 x 484 x 30 22 Ø165 x 35 22 Ø215 x 35 11 Ø173 x 35 11 1200 x 1000 x 2 11 Ti Gr.2 for tensile, metallographic and tightening tests (only 25 mm) 220 x 100 x 25 11 Tensile and metallographic samples have recently been machined, tests will be performed in the coming weeks. 220 x 100 x 30 11 220 x 100 x 35 11 400 x 200 x 25 11

3. Material summary (Ti-grade2 + 5) ITEMDimensions [mm] Ordered [n o ] Received [n o ] Comments Ti Gr.2 for ring screw caps He tank & tightening tests (only 3 mm) 500 x 575 x 2 11 Ultrasonic testing required? 590 x 530 x 3 11 Ti Gr.2 for shear and traction tests on bolts, tooling Ø30 x 140 88 Shear and traction tests foreseen for November Ø40 x 100 88 40 x 50 x 150 88 25 x 40 x 112.5 88 40 x 53 x 120.5 88 40 x 55.5 x 124 88 Ti Gr.2 for brazing test Ø100 x 30 33 Ø144 x 16 33 Bolts in Ti Gr.5 for prototype helium tank M5 x 20 150 Quick metallographic inspection of thread performed; Molycote vs. apiezon test performed M6 x 20 300

4. Material summary (Nb) ITEMDimensions [mm] Ordered [n o ] Received [n o ] Comments Nb for welding tests & qualification 520 x 520 x 4 77 (5.5 left) Ultrasonic test OK; 0.5 unit of 4 mm and 0.5 unit of 2 mm to be used for brazing and tightening tests 520 x 520 x 3 33 520 x 520 x 2 33 (2 left) Nb55Ti for welding tests & qualification 520 x 520 x 4 22 (1.5 left)Ultrasonic test OK Nb for HOM – DQW manufacturing 210 x 210 x 35 22Heraeus; UT currently being performed Ø60 L=100 33 Heraeus; UT performed on Ø50, unexploitable; Metallography currently being performed, very inhomogeneous grain structure, probably out of spec.; Ø25 too long, rest will be used for UT calibration Ø85 L=100 33 Ø50 L=100 33 Ø25 L=100 33 Ø60 L=100 10 NingXia; UT performed on Ø50, not fully exploitable due to grain directionality and lack in calibration material; Metallography currently being performed, results look promising. Ø85 L=100 10 Ø50 L=100 10 Ø25 L=40 10 210 x 100 x 40 77Ultrasonic test OK

5. Material summary (Nb + MISC) ITEMDimensions [mm] Ordered [n o ] Received [n o ] Comments Nb for HOM – RF manufacturing 272 x 70 x 20 4- Tender closed on the 25 th of September, material will be ordered this week 44 x 90 x 20 4- 310 x 160 x 4 3- 310 x 180 x 4 1- Ø85 L=30 4- Nb for calibration blocks Ø85 L=320 1- Nb for electro-hydro forming No dimensions -- Nb for high strain rate forming No dimensions --Study on various strain hardening rates Nb for cavity body DQW 4 mm thick plate -- Material for 2 cavities Nb for beam port cavity DQW 3 mm thick plate -- Nb55Ti for interface Nb-Ti for cavity DQW No dimensions -- 316LN for flanges cavity DQW No dimensions --

6. Additional material? Tuning system? Cryostat? Connections?