Transcript Notes on Ramp-Up and Production LEP-II : Main Parameters (Nb/Cu) 288 Cavities Total…ILC 16,000, Active length = 500 m.

Notes on Ramp-Up and
Production
LEP-II : Main Parameters (Nb/Cu)
288 Cavities Total…ILC 16,000,
Active length = 500 m
4 cavity module, 11.3 m long
72 Modules Total..ILC = 2000
36 klystrons
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
Initial Cavity/Module Production
19 Modules delivered
12 accepted / 2years
50/year
< 20/year
50/year
6 years total
29/year
24/year
12/ year
4/year
Initial and Final LEP Cavity Performance
CEBAF, JLAB,
338 cavities, 40 modules (8-cavity)
1500 MHz, 5-cell cavities
8-cavity Cryomodules
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
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
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.
1200 cryomodules, 1 B$ scale, smaller but comparable to ILC Main Linac Scale
6 years = pre-construction and construction
2 years
LHC R&D and Production Phases
10000
Series1
LHC Project
Approval
100
1m
10
10m
12 m
1
19
91
19
92
19
93
19
94
19
95
19
96
19
97
19
98
19
99
20
00
20
01
20
02
20
03
20
04
20
05
20
06
Modules
1000