Summary of NCSX SIT Meeting of Monday, Mar. 3, 2003

1. Announcements (Hutch)

* PCS Review went well last week.

2. Diagnostics-related Critical Issues (Dave J., Brent)

*  Port redesign to incorporate flaring at VV interface has been developed by Russ Feder. It is planned that this concept will be incorporated on a few of the ports.

ACTION: Dave/Russ to contact Mike Cole to work out interface details.

* Magnetic diagnostics: Vision of desired magnetic diagnsotic system has become clearer in recent weeks. There is a desire to have sensors on the interior and exterior of the vacuum vessel, and flux loops co-wound with each coil. Critical issues:

- Interior flux loops: Vacuum vessel and first wall geometry are being defined now: need to allow space (at least 1cm) for in-vessel magnetics. A strategy for feedthroughs and in-vessel cable routing is needed. A 2D mapping of the VV interior may be useful. Some accommodation for diagnostics in the design of the ribs or PFCs may be requested.

ACTION: Dave work with Paul Goranson on these issues.

- Exterior flux loops:  Difficult location due to presence of cooling tubes, tight assembly clearances, lack of access once machine is assembled. Diagnostic there should be minimized.

ACTION: Dave work with Paul Goranson on these issues.

- Co-wound flux loops: Requirements were discussed in recent meeting.

ACTION: Wayne post minutes.

- Integration with Machine Assembly plan. Exterior diagnostics apparently must be assembled before coils are installed over vacuum vessel. Interior diagnostics apparently should be installed later, after VV field welds are complete and ports installed. Integration is needed.

ACTION:  Dave work with Jim Chrzanowski on sequence for exterior diagnostics assembly.

ACTION:  System Engineering (Wayne, Bob) provide further guidance to be sure magnetic diagnostics are integrated into design and assembly planning.

* E-beam diagnostics: Issues include:

- What are the requirements (e.g., for port access, RT operation, field strength, steady state or pulsed scenarios)?

- What is the recovery strategy if flux surface problems are seen?

Further discussion is needed.

ACTION: Mike schedule a Thursday afternoon physics meeting on this topic.

3. Advanced Conceptual Design Critical Issues

* Smoothing the waviness in the modular coils. (Mike)

-PIES runs for current-optimized equilibria for EO1 and EO3 coils are seeing problems at the edge, attributed to local iota changes there. Fine tuning to fix the problem is in progress. We are still at least a few days away from finalizing this.

* Establishing the baseline VV geometry. (Brad)

-Still working on coming up with a smooth vacuum vessel geometry that meets Art's constraints for coil assembly. Trying to get a candidate first wall geometry by the end of the week.

4. Preparation for the PDR (Wayne, Ron)

It is time to focus on the details of preparations for the PDR, June 24-27.

* Engineering: Preparation guidelines will be issued to all the WBS managers in advance of a Project Engineering Meeting, planned for March 12, which will be the kickoff for the PDR (Wayne)

* Re-baselining: We will do an incremental update of the CDR baseline. More detail in the schedule logic will be requested. Ron will issue guidelines shortly. We are aiming for an update by the end of April. We should get as many systems as possible out of the way by then. (Ron)

5. Next SIT Meeting: Monday, Mar. 10.

Summary by:

Hutch Neilson