ARIES Documents -- Meetings ArchiveARIES Conference Call, 13 November 2003
Documented by L. Waganer
Arrangements for the next ARIES-CS project meeting to be held at PPPL were discussed. The meeting would be held on Wednesday, 3 December and Thursday, 4 December. The first day would be devoted to summary physics, systems code, and engineering talks with inputs and presentations from other Stellarator experts, either at the meeting or participating via phone. Thursday’s agenda would be devoted more to project specific presentations and action item reporting. PPPL would handle inviting the experts. Les Waganer and John Schmidt would prepare a draft agenda. PPPL has already set up a web site for meeting arrangements and security access information, ARIES PPPL Meeting Information. PPPL and UCSD will post electronic files on their web sites for access during the meeting.
Status of ARIES-CS Action Items Identified in September 2003 Meeting
Update Fabrication Cost Algorithms - Les Waganer provided updated cost values to Jim Lyon, who is incorporating them into his code. He said it was not an easy thing to do and it was not complete yet. He needs cost input data for the coils from Leslie Bromberg. He suggested Leslie make a presentation on this subject at the December meeting and provide Jim the data ASAP.
Determine Key Coil Data for the 2-Field MHH2 Case – Long-Poe Ku said he had worked with Paul Garabedian and this had been accomplished with the data being forwarded to UCSD for incorporation into the engineering design/analysis and CAD drawings. Xueren Wang said the updated CAD drawings are posted on the ARIES web site.
Survey 2- and 3-field period system parameters for maximum b values – Jim Lyon said he had not found any viable system solutions at the provided b values. He stressed that he needed to know the maximum b values for both machines. Paul Garabedian said the 2-field case could operate with a b of 4.5 to 5.0 and Long-Poe Ku said the 3-field case could operate with a b of 4.4 to 6.0. Jim said these ranges of b would allow configuration solutions. When asked about acceptable alpha losses, he said this was not a key driver, although it would cause engineering problems at high values. Jim would document his findings and engineering constraints in a memo to be issued shortly.
Provide best current estimate of engineering parameters – Results for this is related to the prior action item regarding configurations and b limits. Jim Lyon is using 95 cm as the thinnest BS+½Coil distance. These data was discussed some and Laila El-Guebaly agreed to send Jim her latest data on this topic. She will also include the variation of the shield thickness with the neutron wall loading data. There was a discussion on the 20-cm thickness quoted by Leslie Bromberg and it was decided this was a radial coil thickness only, not a 20x20 coil cross-section value.
Define coil engineering data – Bromberg not available, hence no update, however data is urgently needed.
Post data on ARIES Web – All data provided is on the web. This will be updated after receipt of Jim’s update.
Refine Maintenance Clearances – Malang and Wang have refined the CAD drawings. The shield has to be thinned everywhere and a local area needs to be reduced to accomplish toroidal removal of the modules.
Define/refine FWBSVV and support structure for both approaches – UCSD is waiting on Jim’s parametric results. Jim said that on the 2-field cases he has run, the coil cases are almost touching on the inner regions. He is allowing 1 cm gap for each of the coils (2 cm total).
Cost Optimization Studies of 2-field and 3-field cases – Jim said he is not funded yet to do anything, but he will try to get this analysis completed by the December meeting.