1. 1 NCSX radial build NCSX Project Meeting December 18, 2002 1.Modular coil build assumptions 2.Vessel build assumptions 3.FW/internal build assumptions 4.Unknowns

2. 2 Modular coil build assumptions  Mod coils are being updated  Current density should improve based on preliminary data DimensionCDR (M45) PDR (M50) W1- Width of winding incl. ground wrap 4.125 in W2 - Winding - center to bore 2.5 in C1- Width across outside of clamp (w/o rib) 4.685 in C2 - Outside of clamp - center to bore 2.75 in CR -sqrt((C1/2) 2 +C2 2 )3.612 in Tolerance on CM (1.5 mm winding+ 1mm clamp) +/- 0.1 in CRM- Max winding center to coil bore, with clamps 3.712 in (9.43 cm) Assume: 3.25 in CRM

3. 3 VV build assumptions  Vessel tolerance different on inboard and outboard  Coils must slide over vessel during assembly  Port stub length affects outboard, top, bottom Tolerance zone outboard: ~ 2.875 inches Tolerance zone inboard: ~ 1.75 inch

4. 4 VV to Plasma build  Gap needed for in-vessel components and scrape-off layer (SOL)  In-vessel components include trim coils, FW /divertor panels, magnetic diagnostics, RF antennas, etc.  CDR design allowed nominal space of 2.8 in (71 mm) at trim coil location  Space could be tighter away from trim coils  RF antennas are special case, require more space

5. 5 Net build assumptions DimensionInboardOutboard, top, bottom CRM- Max winding center to coil bore, with clamps 3.25 in 8.26 cm 3.25 in 8.26 cm Gap 1, includes space for assembly, thermal expansion 1 in min. 2.54 cm 1 in min. 2.54 cm VV envelope, includes tubing, VV shell, tolerance, thermal insulation 1.750 in 3.18 cm 2.875 in 7.30 cm IVC - In-vessel components, including trim coils, FW, etc. 2.750 in 7 cm 2.750 in 7 cm SOL – Scrape off layer2 cm min? Total, w/o SOL8.75 in 22.2 cm 9.875 in 25.1 cm Total, w/o SOL or Trim coils7.37 in 18.7 cm CRM Gap1 VV IVC SOL

6. 6 Unknowns  What is actual assembly clearance required?  What and where are RF antennas?  What will be radial and lateral build of new M50 coils?  Things we have not thought of