1. ITPA12 Diagnostics - PPPL - 3/26-30/07 1 US ITER Project Plans David Johnson Diagnostics Team Leader March 26, 2007 ITPA12 Design Basis US Scope Port Plugs and Integration Assessment Studies Schedule/Milestones

2. ITPA12 Diagnostics - PPPL - 3/26-30/07 2 Scope Definition DWG Agreement Forms Basis for Sharing 2004 DWG Sharing Agreement is basis for defining US diagnostic share at 16% – Features ‘port-based’ repackaging - different arrangement of diagnostics from 2001 – Also places responsibility for integration of diagnostics with plug providers – Revision underway to accommodate India -- Not yet fully endorsed When compared with 2001 Basis for determining ITER ‘credit’, some scope ambiguity exists, e.g. – DWG added scope for MSE (2 vs 1 view) and for plug integration relative to 2001 Design – US scope/credit may change to accommodate India New procurement arrangements, incorporating ‘port-based packaging’ need to be negotiated to remove ambiguity. USIPO will not be able to place large design contracts until ambiguities are better resolved.

3. ITPA12 Diagnostics - PPPL - 3/26-30/07 3 US Diagnostic Packages

4. ITPA12 Diagnostics - PPPL - 3/26-30/07 4 Diagnostic Front-End Integration Design constraints – Intermingling of numerous labyrinths, many with precision optics – Provide access while limiting neutron streaming – Provide attachments and cooling to blanket shield modules Plug E3 is a US responsibility (DWG Sharing Agreement) – Many other diagnostics need to be integrated into plug E3  > 2 visible/IR camera views(EU)  2 edge CXRS views (RF)  2 H  arrays (RF)  X-ray crystal views (possible)(??) The division of integration design responsibility between the IT and the parties has not been fully negotiated.

5. ITPA12 Diagnostics - PPPL - 3/26-30/07 5 Development of Radial Diagnostic Cassettes Radial cassettes may make integration and testing easier. May also make maintenance easier.

6. ITPA12 Diagnostics - PPPL - 3/26-30/07 6 Central Tube Development for Upper Ports Metal seal, removable back plate gives access to central tubes. Back plate has only windows. “Hard” feedthrus on side panels

7. ITPA12 Diagnostics - PPPL - 3/26-30/07 7 Developing Neutronics Capability with ATILLA ATILLA, a discrete-ordinates, radiation transport code produced by Transpire, Inc., is being benchmarked for use on ITER. In the US, this work is a joint PPPL/UCLA effort well connected to IO and EU efforts. (See Talk by R. Feder later today) Potentially essential tool for qualifying diagnostic labyrinth designs. Tetrahedral Mesh - 496k Cells

8. ITPA12 Diagnostics - PPPL - 3/26-30/07 8 Assessment Studies For the US instrument development, near-term priorities were presented to the community and widely distributed last Spring. Priorities stressed better definition of instrument front-end configurations, performance assessments, consideration of alternate approaches and tool development. ~ 40 discussions with experts concerning these priority issues and relevant capabilities were documented. Awards for a total of 14 studies (including 2 cost studies) were made in summer and fall. Results will be presented at this meeting. All studies are completed or nearing completion  75% of reports have been submitted. Final reports will be placed on ITER IDM system.

9. ITPA12 Diagnostics - PPPL - 3/26-30/07 9 Assessment Studies

10. ITPA12 Diagnostics - PPPL - 3/26-30/07 10 Next Round of Studies Large procurements to design and fabricate US ITER diagnostics will begin in FY08. To advance front-end design and integration, there will be a second round of studies, beginning this Summer. Plan discussions over the next month regarding new design tasks and potential R&D areas. – These will be documented as before in ‘Records of Discussion’. As designs become better defined, also plan to fund costing studies to improve confidence as Project Cost Baseline is established.

11. ITPA12 Diagnostics - PPPL - 3/26-30/07 11 Schedule/Milestones A prerequisite for major diagnostic design effort is the renegotiation of new procurement arrangements to resolve existing scope ambiguities and clarify stakeholder roles. Definition of mutually agreeable integration of front-end components within the plugs will facilitate many parallel detailed design efforts. FY2014 delivery of qualified port plugs is consistent with top level IO schedule – Detailed plan will likely feature plug delivery phased over a multi-year period.