Material for Crab cavities ordered and foreseen S. Langeslag & P. Freijedo Menendez Material summarized in

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

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 Shear and traction tests foreseen for November Ø40 x x 50 x x 40 x x 53 x x 55.5 x Ti Gr.2 for brazing test Ø100 x Ø144 x Bolts in Ti Gr.5 for prototype helium tank M5 x Quick metallographic inspection of thread performed; Molycote vs. apiezon test performed M6 x

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 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= 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= Ø50 L= Ø25 L= Ø60 L= 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= Ø50 L= Ø25 L= x 100 x 40 77Ultrasonic test OK

Material summary (Nb + MISC) ITEMDimensions [mm] Ordered [n o ] Received [n o ] Comments Nb for HOM – RF manufacturing 272 x 70 x Tender closed on the 25 th of September, material will be ordered this week 44 x 90 x x 160 x x 180 x 4 1- Ø85 L=30 4- Nb for calibration blocks Ø85 L= 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 LN for flanges cavity DQW No dimensions --

Additional material? Tuning system? Cryostat? Connections?