Type IV Cryomodule (T4CM) Design Team Formation & Technical Discussions: Summary

1. Type IV Cryomodule (T4CM) Design Team Formation & Technical Discussions: Summary H. Carter Fermilab Technical Division

2. Did We Achieve the Goals for this Meeting? • Formation of an international T4CM design team • Not exactly--- • but we have broad institutional interest in participation • Is an international team approach the right organizational model for this effort? • Do we need to establish regional coordinators ? • Should we only have discrete work packages with one coordinator/integrator? • Definition of what a T4CM is • Yes, we agreed that the T4CM should include the following features: • 283mm cavity iris-to-iris spacing • quadrupole in the center of the cryomodule beneath the center support post • Identification of a comprehensive list of tasks to be accomplished • Yes • Creation of work packages to address tasks • Need to define scope of word for each task in order to create work packages • Assignment of work packages to T4CM design team members • Not assignment, but rather expressions of interest by team members • Establish a timeline for T4CM design completion • Not exactly---a range of 12-24 months is still anticipated

3. Institutional Participation in T4CM InstitutionCoordinator • CERN V. Parma • DESY R. Lange • FNAL T. Peterson • INFN Milan C. Pagani • INFN Pisa F. Bedeschi • JLAB J. Prebyl • KEK N. Ohuchi • SLAC J. Weisend

4. Arriving at a T4CM Design (Revised) 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr 1st Qtr 2006 2007 2008 Define design features Perform engineering analyses Complete drawing packages Procure components All Components in house and ready for assembly

5. Who will build the T4CM? • FNAL plans: • The third cryomodule to be assembled at Fermilab will be a T4CM design, probably without a quadrupole/BPM package, though a predetermined space will be left for this package and an instrumented mockup (correct size and weight) will be installed. We will use 1200 mm for the quad/corrector/BPM package slot

6. Interactions: ILC Linac Layout • Per request from Chris Adolphsen: • One of the goals of the GDE meeting at KEK on Jan 19-20 is to better define the ILC linac layout. To this end, we have been asked to provide working assumptions as to: • 1) the length of cryomodules with and without quads 2) the external support of cryomodules (e.g. from the floor or ceiling) 3) beamline and insulating vacuum segmentation 4) cryogenic maintenance length and the additional space required between segments 5) the space required to convert from cold to warm sections 6) the refrigerator spacing, capacities and space requirements Have we provided enough information for the KEK meeting?

7. Conclusions and Announcements • We have 17 tasks listed for discussion in the next day and a half, and we want to give each one at least a cursory look, so we may have to table some of the more controversial discussions and return to them if time permits • Future meetings---format, when, where, frequency, etc. Are there any suggestions? • Cryogenic System Meeting Reminder: Tomorrow morning • Announcement by John Weisend

8. Announcements Cryogenic System Meeting Reminder: • When: Wednesday, 18 January 2006, from 9:00 to 12:30 • Where: Building 36 room 36/1-013.

9. Conclusions and Announcements • Future meetings---format, when, where, frequency, etc. Are there any suggestions? • Cryogenic System Meeting Reminder: Tomorrow morning • Announcement by John Weisend

10. Conclusions and Announcements • Thank you all for attending and helping to make this meeting successful. I believe we have made some good decisions that will enable us to proceed with the T4CM design effort. • Thanks to our CERN colleagues for hosting this meeting • Have a safe journey home (or to your next meeting location!)