1. Notes on Ramp-Up and Production

2. LEP-II : Main Parameters (Nb/Cu)

3. 288 Cavities Total…ILC 16,000, Active length = 500 m

4. 4 cavity module, 11.3 m long

5. 72 Modules Total..ILC = 2000 36 klystrons

6. Cavity Development 1989: Nb cavity : Four prototypes at CERN
1992: 20 cavities, 3 vendors
1992: Change in technology from Nb to Nb-Cu,
3 Vendors selected
Initial production rate < 20 /year
Final production rate 50/year

7. Initial Cavity/Module Production
Modules delivered
12 accepted / 2years
50/year
< 20/year

8. 50/year

9. 6 years total
29/year
24/year
12/ year
4/year

10. Initial and Final LEP Cavity Performance

11. CEBAF, JLAB, 338 cavities, 40 modules (8-cavity)
1500 MHz, 5-cell cavities
8-cavity Cryomodules

12. Timeline (Initial Development to Installation – 6 years)
1987: 4 vendor competition, B&W, TRW, Dornier, Interatom (now ACCEL)
2 cavities each,
tested at Cornell
Facilities installation at Jlab started
1989: Order placed to Interatom (now ACCEL)
1990: Initial production rate 3 cav/month
Oct 1990 : Full production rate 12 cav/month
One vendor
Early 93: Cavity order completed (338 cavities)
May 93 : 28 modules installed in one linac

14. R&D With Industry Phase Before LHC Approval
Initial R&D with industry, 1991 – 1994
7 x 1.3m magnets/modules ordered from 5 firms
7 x 10 m long magnets/modules ordered from 4 firms
LHC approved in Dec 1994

17. After LHC Approval (1995) Initial Stages
The LHC requires 1200 cryomodules (15 m long) as compared to the ILC’s 2000 modules (12 m long).
There were three stages before the sizable “pre-construction” series of 90 modules in 2001.
Stage 1 start in October 1995:
After design and modeling work at CERN, 3 prototype coils were built in industry and modules assembled and tested at CERN.
Stage 2 (summer 1998):
Vendors assembled 9 modules (3 per vendor) at CERN using magnet assembly facilities installed at CERN.
Stage 3: Beginning of Pre-series of 90 modules (end of 2002)
Vendors then manufactured a total of about 20 modules (7 per vendor). About 6 of these were fully tested (2 per vendor). Pre-series production released
In all, a total of 32 modules were prepared by the CERN/industrial collaboration before releasing the pre-series production of 90.

18. 6 years = pre-construction and construction
1200 cryomodules, 1 B$ scale, smaller but comparable to ILC Main Linac Scale
6 years = pre-construction and construction
2 years

19. LHC R&D and Production Phases
LHC Project
Approval
1 m
10m
12 m