1. Evolving an ILC focused SCRF Facility from the XFEL Infrastructure
Lutz Lilje
DESY -MPY-
DESY 11/2006
XFEL Plans of direct relevance for the EU infrastructure
What ILC can offer

2. Remember:
Large labs can supply cryogenics and a good deal of test infrastructure
E.g. CERN Plant
Trade additional XFEL test hall test stand vs. Existing teststand
Several labs have infrastructure
Coupler testing
Horizontal test setups
Also usable for tuner tests
This is to a large degree the big money…
Lutz Lilje DESY -MPY-

3. XFEL Plans of direct relevance for an EU SCRF infrastructure
Setting up a significant test infrastructure besides TTF
AMTF: Accelerator Module Test Facility for XFEL Production
CMTB: Cryomodule Test Bench (exists already)
Outsourcing of long electropolishing (EP) step in preparation process to industry
Pursuing ILC alternatives with large-grain niobium material
Mono- and Multi-cells
Demonstrates that there is still some (limited) flexibility within XFEL cavity program
Lutz Lilje DESY -MPY-

4. XFEL Accelerator Module Test Facility (AMTF)
From XFEL-TDR
Lutz Lilje DESY -MPY-

5. Cryomodule Test Bench (CMTB)
Currently preparing for high-gradient module M6
Lutz Lilje DESY -MPY-

6. Outsourcing of EP to Industry
The two EP steps are a bottleneck in the current cavity preparation process
Industry is in principle capable of doing this process
See EP single-cells coming up in this talk (and more…)
Done by industry in Japan since many years
To start the industrialization process XFEL has requested bids from companies for the first rough EP step of ~100um on 30 cavities
Benefits
Industry gets experience
Reduces load on DESY EP facility
Lutz Lilje DESY -MPY-

7. Lutz Lilje DESY -MPY-

8. Large-Grain Single-cell: 1AC3
Test 3 after EP and bake
40 MV/m at high Q0
Test 4 BCP ~40 um ?
Test 5 Bake
Lutz Lilje DESY -MPY-

9. Large-Grain Multi-Cells
Lutz Lilje DESY -MPY-

10. A Synergetic Scenario for a ILC-XFEL
Basic assumptions
Staging must be possible
Funding restrictions
Assume dedicated larger infrastructure later (second bid)
ILC requirements
Focus on high-gradient programme
Adaption to ongoing R&D programme
Needs dedicated material i.e. cavities
XFEL requirements
Low impact in terms of scheduling
Compatibility of components
Would profit from added test capacity
Lutz Lilje DESY -MPY-

11. ILC-XFEL synergy: Cavities, Modules etc.
ILC could offer (finance) additional
Cavities for XFEL
ILC gets/‘buys‘ right to select cavities out of XFEL process line for high gradient program
XFEL modules
spares
ILC gets/‘buys‘ right to do S2 specific tests
Benefits
Cost: XFEL discount
Additional cavities available for process setup
Lutz Lilje DESY -MPY-

12. ILC-XFEL synergy: Cavity Preparation
XFEL started to outsource EP to a large degree
Get pre-processed cavities for XFEL and ILC program
To support industrial EP process, ILC could
built second and improved EP facility in industry
Support re-treatment of cavities to recover performance
ILC could use existing facilities at TTF due changed load
Increase number of cavities prepared for low-power testing
But additional manpower from ILC (e.g. DESY-FH) is required to do extended shift operation
Complete new clean room -> second bid
Benefits
Preparation capacity more quickly available
Training scenario for European colleagues
Strong industrial involvement
Lutz Lilje DESY -MPY-

13. ILC-XFEL synergy: Test Infrastructure
Vertical testing capacity is a non-issue at DESY
Typically up to 4 tests/week could be done
Cavity preparation is the bottleneck
High-power testing
Provide testing capacity for XFEL modules
ILC could finance additional stand in AMTF hall using part of exist infrastructure (e.g. cryo!)
Get/‘buy‘ right to use existing CMTB for specific tests
String test using DESY infrastructure
Put spares (see above) in XFEL tunnel?
Alternative: Central ILC facility
Benefits
Cost: XFEL discount
Compatible frequencies: Klystrons etc. available
Quicker start-up
Lutz Lilje DESY -MPY-

14. International collaboration
Central activities
Module integration at central facility
Could be either a central ILC facility in Europe (e.g. CERN) or elsewhere
Outsource components
Cavities (DESY/XFEL)
Via XFEL
Tuner (INFN, CEA), Coupler (LAL), BPM (CEA), LLRF (Poland), Magnet (CIEMAT)
Module cryostat (INFN)
Outsource testing
High-power individual cavity tests e.g. at CEA
High-power module tests e.g. to DESY
Benefits
Could start on critical path items earlier
E.g. Niobium procurement, Cavity fabrication etc.
Could stretch schedule to match funding
Lutz Lilje DESY -MPY-

15. Time-line 1st call Money for Prototyping (money in 2008)
Buy niobium, cavities, couplers and tuners
Manpower
Improved second EP line in industry
Prepare for clean room bid
2nd call for Infrastructure (money in 2009)
Clean room for central facility
Trade additional AMTF test stand vs. CMTB
Module cryostats
Clean room for module integration e.g. at CERN
Lutz Lilje DESY -MPY-

16. Scheme of Cryomodule Production (1st call)
Fabrication of cavities
Procurement of couplers
Pre-treatment of cavities
In Industry
In Labs
Coupler Processing
Inspection
Final Cavity Preparation
Tuners
Low-power testing
High-power testing
Tuner Tests
Tank welding
BPM
Magnet
Module Test
Module Assembly Cleanroom
Cryostat
Lutz Lilje DESY -MPY-

17. Scheme of Cryomodule Production (1st call)
Fabrication of cavities
Procurement of couplers
Pre-treatment of cavities
In Industry
In Labs
Coupler Processing
ILC-XFEL
Inspection
LAL
Final Cavity Preparation
Tuners
CEA, INFN, CERN
Low-power testing
High-power testing
Tuner Tests
Tank welding
CEA
CEA
BPM
CIEMAT
Magnet
Module Test
Module Assembly Cleanroom
Cryostat
Lutz Lilje DESY -MPY-

18. Scheme of Cryomodule Production (2nd call)
Fabrication of cavities
Procurement of couplers
Pre-treatment of cavities
In Industry
In Labs
Coupler Processing
Inspection
Final Cavity Preparation
Tuners
Low-power testing
High-power testing
Tuner Tests
Tank welding
BPM
Magnet
Module Test
Module Assembly Cleanroom
Cryostat
Lutz Lilje DESY -MPY-

19. Scheme of Cryomodule Production (2nd call)
Fabrication of cavities
Procurement of couplers
Pre-treatment of cavities
In Industry
In Labs
Coupler Processing
Central Facility in Europe
Inspection
LAL
Final Cavity Preparation
Tuners
CEA, INFN, CERN
Low-power testing
High-power testing
Tuner Tests
Tank welding
CEA
CEA
BPM
CERN
CIEMAT
Magnet
Module Test
Module Assembly Cleanroom
Cryostat
INFN
Lutz Lilje DESY -MPY-

20. Summary Synergetic ILC-XFEL scenario shown
Allows staging to match funding
Assumes new clean room later
Location still to be defined
Quicker start-up
International collaboration
Outsourcing of work packages e.g. cavities, couplers etc.
Integration at central facility can be matched to funding situation
Lutz Lilje DESY -MPY-

21. Lutz Lilje DESY -MPY-