ILC Re-baseling Joint CES & CLIC C&S WG 9 September 2009 J.Osborne / V.Kuchler / A.Enomoto

1. ILC Re-baseling Joint CES & CLIC C&S WG 9 September 2009 J.Osborne / V.Kuchler / A.Enomoto

2. Accelerator Design & Integration Meeting DESY 28-29th May 2009 • SB2009 alternatives : • Single tunnel (Klystron Cluster or Distributed RF (DRFS) configuration) • Central Region Integration • Positron Source – System moved to end of main linac • Damping Ring – 3.2km long • Ring to Main Linac – Single stage compressor

6. CFS Points-of-Contact • Electron Source • Axel Brachman & John Sheppard - Tom Lackowski (supported by M+W Zander) • Positron Source • Jim Clarke - John Osborne • Damping Ring • Susanna Guiducci - Tom Lackowski • Ring to Main Linac • Nikolay Solyak - Vic Kuchler (supported by M+W Zander) • Main Linac • Chris Adolphsen (Klystron Cluster) - Tom Lackowski • Shigeki Fukuda (DRFS) - Atsushi Enomoto • Beam Delivery System • Andrei Seryi, Deepa Angal-Kalinin - John Osborne 6

7. Material will be posted on Indico : http://ilcagenda.linearcollider.org/conferenceDisplay.py?confId=4146

8. 3.2km long ‘racetrack’ damping ring

9. Beam dumps have been added (all cavern dimensions to be reviewed)

11. 5.2m diameter Single tunnel beyond shafts 2 and 3

12. Tunnel enlargement (9.5m width) in Source areas

13. 5.2m diameter service tunnel and machine tunnel leading up to experimental area

14. Interaction Region

15. Main Beam dumps need to moved to ‘south side’ ie opposite side of DR pointing downwards on this drawing. This means, due to Muon radiation, level of service tunnel needs to be adjusted Note : Some of these issues at refinments of the RDR rather than SB2009 !

16. Service tunnel revised layout

17. Service tunnel revised layout – Dump is below service tunnel

19. Service tunnel revised layout – Dump is below service tunnel

20. This size of this enlargement needs to be revised : 3d model from Daresbury due this week (AUTOcad already available) Tunnel enlargement (9.5m width) in Source areas

21. Tunnel enlargement (9.5m width) in Source areas needs to be reviewed (transport corridor on one side is acceptable?)

22. Klystron Cluster power distribution system Long high-power waveguides RDR X 70 RDR X 64 A Klystron Cluster with 70 klystrons feeds 64 accelerator modules. 22

23. 5 Reference slides: RF Cluster Scheme, 23

24. Klystron Cluster Alternative • This Was the Process Used to Evaluate the Klystron Cluster Alternative 24

25. Working Assumptions (WA) for SB2009 - 2a • “Single tunnel solution for the Main Linacs and RTML, with two possible variants for the HLRF • (a. Klystron Cluster Scheme) • This Evaluation has been Completed for US • Civil Costs were reduced ~25% (~$300M) • 3 Shafts were Added • 4 Surface Sites were Added • 10 Buildings for Klystron Cluster Surface Equipment were Added • 28 Refuge Areas were Added in Accelerator Tunnel • Other Cavern Volume was Reduced 25% • Air Treatment Increased 25% • Process Water Decreased by 54% • Electrical Decreased 25% • Piped Utilities Increased by 370% for Sprinklers in Tunnel 25

26. (2) Distributed RF System (Tunnel view) 26

27. Area of Refuge Nov. 17, 2008 ILC08 Global Design Effort 27

30. CLIC 4.5m tunnel : Transversal Ventilation

31. Main actions/conclusions from Daresbury • 2d drawings to be updated and reviewed internally before release (FNAL) • Updated machine 3d models by Daresbury for positron source area (including BDS etc) awaited to allow sizing of the tunnel/alcoves • Drawings will be different for each region……. • Transport passage on one side of the machine ok • DR relatively well understood remains on north side. Cavern sizes adjusted. • RTML : one of the beam dumps can be deleted (On next 2d layout the beam dumps should be labelled ‘main dump, 17KW dump etc to avoid confusion.) • BDS : position and size of beam dumps unclear : 3d model by Norbert required.... • Main beam dumps need to be moved to other side of linac : may to put service tunnel at a higher level than beam tunnel due to muon beam radiation • 2nd tunnel for safety : Atsushi : Two possibilities: • 1. Fire shelters or compartments • 2. In Japan second tunnel option should not be excluded due to increase in safety requirements • this will be presented at Albuquerque? • do we need cryo vent pipe under pressure ? • Muon walls questions, getting equipment either side ? • Machine lines from main linac to DR transfer line is an issue • beam dumps cross transport lines, extra shafts ? • diameter of main linac 4.5 or 5.2m cost very similar = see cost curve from FNAL…. • services required for ML klystron electronics, instrumentation, shielding etc. needs better definition to update cross section • heat loads mostly understood by CFS…Emil….(DRFS full power/ low power confirmed by KEK 9 Sept) • For Albuquerque : • 2d's updated • Norbert to do 3ds for machine • 3d civil updated • Nick Walker asked for cost estimate for this new layout with respect to RDR………..

32. Upcoming CLIC Meetings • CLIC two-beam module review : • 15-16 September Talks on CE, CV and transport • CLIC Workshop : • 12-16 October • ….