1. Baseline Technical Review – Central Region Accelerator Systems
Marc Ross, (Fermilab)
Nick Walker, (DESY)
and Akira Yamamoto (KEK)
Baseline Design definition for TDR
BTR Closing DESY
Marc Ross, Fermilab

2. Review Structure Basic format for each AS
Comprehensive review of design
Survey of risk-related R & D
Focus on identified key aspects
CFS requirements
Costs
Stakeholders must contribute!
BTR Closing DESY
Marc Ross, Fermilab

3. Key aspects to BTRs Comprehensive review of proposed design
Focus on changes with respect to RDR
“change control”
Attempt to make key design decisions where necessary
Report R & D
Review CFS requirements
Review of cost
Prepare baseline documents for EDMS
Written BTR Report
BTR Closing DESY
Marc Ross, Fermilab

4. BTRs July 2011 INFN Frascati October 2011 DESY January 2012 KEK
Damping Ring
October 2011 DESY
Electron source
Positron source
RTML (including bunch compressor)
BDS / MDI
Central region integration (general)
January 2012 KEK
Main linac and SCRF technology
March 2012 CERN
CFS (global)
BTR Closing DESY
Marc Ross, Fermilab

5. GDE Plenary meetings and Reviews - Schedule:
Baseline Reviews
Formalize Changes to 2007 Reference Design
DESY ( ), KEK ( ), CERN ( )
GDE Plenary meetings:
Korea Gyeongju ( )  Cost information
US Arlington Texas - LCWS ( )
TDR Workshop(?):
Review, assemble, rework initial drafts
Early summer, between plenary meetings
BTR Closing DESY
Marc Ross, Fermilab

6. 2012 - ILC TDR: Two Volumes R & D:
A description of the global risk-mitigating R & D program carried out during the Technical Design Phase.
Must include enough detail to support design changes and improvements made to the 2007 Reference Design for the new Baseline.
Design:
A definitive description of the Baseline Design
(similar in scope and expository tone to RDR)
BTR Closing DESY
Marc Ross, Fermilab

7. TDR  RDR AS: CFS: Beam Test Facilities R & D Both in Vol. 1… but
Vol. 2 must describe the effect of R & D on the design
CFS:
Mostly new
Substantial investment, to be reflected in a new design and improved cost estimate
Site-specific adaptation of the design  important
BTR Closing DESY
Marc Ross, Fermilab

8. TDP Accel. System R & D (Central region)
BDS:
Atf2 travelling down the convergence slope.
e+:
Flux concentrator
Target
e-:
Gun
RTML:
Emittance growth
Phase tolerances
MDI
BTR Closing DESY
Marc Ross, Fermilab

9. DESY BTR Action List
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10. Definition of lattice treaty points
Source (e-) to DR (e-)
DR (e±) to RTML (e±)
RTML (e±) to Main Linac (±)
Main linac (e-) to e+ source  needed
e+ source to BDS
e+ source to DR (e+)
Main Linac (e+) to BDS (e+)  needed ?
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11. Main Dump Physical space required for dump Shielding requirements
Integration into BDS CFS solution
...
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12. Integrated lattice design
Move DR transfer tunnel - BDS branch point upstream of Main Dump location
Adjustment of initial spin angle (PLTR/ELTR) and subsequent geometry, DR location etc
Cost impact
Solution/Requirements for RTML to match current CFS Main Linac cross section
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13. Review Central region tunnel solutions
Service tunnel solution
Transverse tunnel sections
...
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14. CFS (general) Produce list of lasers and their locations Gun
Polarimetry (BDS)
Profile monitors
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15. 5 GeV SCRF Booster Linacs
Review choice of gradient etc.
Rating to include current ‘overhead’ x1.5
Choice of HLRF and its layout in the tunnels
Not KCS
Cryogenic supply and transfer lines
...
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16. e+ source specific Remote handling requirements and shaft requirements
Reduced Field FC as TDR baseline
Spin flipping system
Evaluate space requirements; include space in LTR
Understand tolerances and systematics
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17. Check heat-load for capture RF @ 10Hz ...
e- source specific
Check heat-load for capture 10Hz
...
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18. Accelerator Parameter Table Updates
Update e+ parameters for reduced field FC
DR acceptance
5GeV booster parameters (incl. over-production)
Check energy spreads (two-stage compressor)
Consolidate LET emittance growth table
...
This is outstanding for over a year. Talk to Nikolay and Kubo about the status. Was it every completed?This is outstanding for over a year. Talk to Nikolay and Kubo about the status. Was it every completed?
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19. Compressor Assume two-stage for TDR baseline Consolidate CFS criteria
Subject to re-evaluation
Consolidate CFS criteria
Energy acceptance of extraction lines
Large energy-error beams
Cryomodule focusing magnet
...
I'm guessing Vic & Co have been working on the SB2009 assumption for a single-stage. All of this work will need to be reverted to RDR.I'm guessing Vic & Co have been working on the SB2009 assumption for a single-stage. All of this work will need to be reverted to RDR.
Needs review. Also needs discussion of what the acceptance requirement should be. This depends on commissioning, tuning and fast abort scenarios.Needs review. Also needs discussion of what the acceptance requirement should be. This depends on commissioning, tuning and fast abort scenarios.
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20. FD integration Polarimetry – near RTML?
Detector / MDI Issues
FD integration
Polarimetry – near RTML?
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21. Aux. e+ source Assume Kuriki style for TDR baseline
500 MeV s-band linac
incorporation of thick target: ‘MOSAIC’ to be studied
...
Understand how the source can best be used
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22. Operations and Commissioning Study
Need to form a task force: Charge?
Review of dumps, diagnostic stations etc.
Early commissioning
Machine development possibilities
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23. Dumps:; bandwidth CFS List (11.2009): Any lost dumps?
E+ fast abort 11 KW
Bandwidth requirement
Linac bandwidth: low end 50% E_0
BTR Closing DESY
Marc Ross, Fermilab

24. CFS agenda for Cern BTR:
Mountain Region Site development
BTR Closing DESY
Marc Ross, Fermilab

25. Friday, 28 October, 2011 Central Region CFS Integration
To be discussed:
09:00 – 11:00 and 14:00 – 15:30
From the Review:
Discrepancies and inconsistencies
Layouts: EDMS (Benno), US CFS drawings, beamline schematics
Dumps: location, usage scheme and capacity. Footprint. 10 Hz Source operation – dump scheme.
Tunnel enlargement profile: location of step changes, total volume. Transverse space requirements
Installation strategies for key components: HLRF and cryomodules
Critical support subsystems: HLRF, Cryo, lasers and magnet power
Service tunnel space usage (equipment types, totals and footprint)
Visit to Virtual Reality Room
Detector Hall:
11: :30
Shaft strategy
Utility requirements

26. DESY BTR – 27.10.2011 Reduced Field FC as TDR baseline
Two-stage for TDR baseline
Auxiliary Source with Kuriki parameters
Booster HLRF Rating to include current ‘overhead’ x1.5
Booster HLRF not KCS
BTR Closing DESY
Marc Ross, Fermilab