Wrapup and discussion Internal review Helene Felice for

  • Slides: 4
Download presentation
Wrap-up and discussion Internal review Helene Felice for the CEA team 23/07/2020

Wrap-up and discussion Internal review Helene Felice for the CEA team 23/07/2020

R 2 D 2 AT A GLANCE SMC + R 2 D 2 Goals:

R 2 D 2 AT A GLANCE SMC + R 2 D 2 Goals: • Validate fabrication process from winding to impregnation/instrumentation • Demonstrate grading technology while minimizing • Technical risks: • with external joints • With a simplified geometry => racetrack • Financial risks • Minimize amount of conductor => Single layer racetrack Operating Points Current value Central field (LL margin) Nominal at 4. 2 K (20% LL margin) 13772 A 10. 4 T Short sample at 4. 2 K 17215 A 12. 5 T Nominal at 1. 9 K (20% LL margin) 15055 A 11. 15 T Short sample at 1. 9 K 18819 A 13. 3 T Ultimate current 16500 A 12 T (4. 5% @ 4. 2 K 11. 3%@1. 9 K) Impact on design aspects Structure: Preload lowerbound Structure : Preload upperbound /components integrity Protection limit Possible stress limit R 2 D 2 internal review - 23/07/2020 Page 2

R 2 D 2 CHALLENGES But R 2 D 2 has some challenges =>

R 2 D 2 CHALLENGES But R 2 D 2 has some challenges => mitigation actions: • Coil geometry: • cable routing (exit jumps) => validation through mock-ups • Number of Nb 3 Sn/Nb. Ti joints in small volumes => validation through mock-ups • EMAG: peak fields location => iron and ends optimization to minimize Bend • Challenging Protection due to high Jcu => Definition of an ultimate operating point => beyond that point, R 2 D 2 becomes an opportunity to probe high MITTs regime • Mechanical: challenging mechanics toward SS => dedicated structure (F 2 D 2 was oversized) => Target ultimate WP: 12 T • Operation at 1. 9 K: concern on instabilities => Target nominal field 10. 5 T at 4. 2 K Some action items discussed previously… R 2 D 2 internal review - 23/07/2020 Page 3