05 December 2001

Presentations/Technical Reports

Minutes

Our weekly telecon was held on December 5.  Reiersen opened the meeting with a discussion of developments and plans in the area of coil design.  There will be a meeting on Friday, December 7, to discuss progress.  Engineering is expected to provide feedback on desirable and undesirable features of the M30 (Williamson) and Z05 (Brown) designs.  The plan is to choose among the candidate options on December 13.  Thereafter, Hudson will modify the modular coils to remove the islands.  The final coil set for the CDR will be provided by December 21.

The coil cooling calculations reported by Dahlgren at the November 30 meeting were reviewed.  The results did not change significantly.  Goranson will provide a cross-check on the calculations for the next meeting.  Nelson will provide a recommendation on what we should adopt as the basis for the conceptual design.  Subsequent to the meeting, Fan updated his calculation based on a revised insulation thickness and thermal conductivity.  The results are provided in the presentation link above.

Structural analysis for the CDR will be based on the 1102 design.  Williamson will provide modeling information to HM Fan, who will be providing analysis support to Williamson on the coils.

Nelson reported that he is planning on procuring a 1/12 scale stereo lithography model (SLM) of the stellarator core.  He indicated that some manipulation will be necessary to get the coils over the vessel.  The SLM will be for the 1102 design.  If time and resources permit, we may procure another model for the the CDR.

Nelson indicated that another meeting should be set up to discuss the insulation scheme.  From a winding viewpoint, it looks most convenient to bond the Kapton to the dry glass before winding the insulation on the conductor.  The dry glass/Kapton insulation would be half-lapped around the conductor.  The insulated conductor bends easily, like an "armadillo skin".  The concern is bonding Kapton-to-Kapton during the vacuum pressure impregnation.  Heitzenroeder indicated that etched Kapton would be required.

Nelson indicated that as part of the pre-CDR R&D, CTD would produce some "logs" and perhaps a "hairpin".  Conductor samples would be sent to CTD within the next 2 weeks.  By the first part of February, the potted samples would be available for testing and property determination.  Structural analyses would be repeated after this based on the newly determined properties.  It was noted that this schedule is very tight in order to wrap things up for the CDR.

Nelson indicated that development of the 1102 design for structural analysis and the manufacturing studies are progressing well.  The main outstanding issue is support of the TF coils.

The next meting is scheduled for December 12.

Please forward any comments or corrections to reiersen@pppl.gov

(last edited on 12/11/2001 07:09 AM )