1

First wall mods status

NCSX SIT Meeting

July 1, 2002

•Points at 0, 30, 60 degrees from Art

•Points x 1.025 in cross sections

•RF launchers bigger issue than trim coils

2

Model

RF launcher locations, typ 6 places

FW panels, 360 deg shown

Modular coil partial assembly

Vessel with insulation

3

Plan cross section

10 deg

0 deg

20 deg

30 deg

40 deg

50 deg60 deg

RF launcher locations

Trim coils

4

Cross section at 0 degrees

Trim coils intersect this section

Almost all points are inside first wall

5

Cross section at 10, 20 degrees Points not available yet Trim coils intersect 10 deg section

20 deg

10 deg

6

Cross section at 30 degrees

Trim coils do not intersect this section

Closest approach to first wall

7

Cross section at 40, 50 degrees Points not available yet RF launchers intersect these sections

40 deg

50 deg

Co-ax

Faraday shield

8

Cross section at 60 degrees

Field joint and limiters are around this section

RF launchers on either side

Almost all points are inside first wall

9

Cross section at 60 degrees

Cross section changes abruptly

Limiter visible in this view

RF launchers on either side of this section mostly hidden by limiter

limiter

10

RF launcher options

Reduce number of launchers to 4 instead of 6 per section Less power?, unless strap lengths can be increased

Reduce coax to 4 inches instead of 6, maybe smaller

Move feeds farther out by running strap through “tunnels” to get straight-in shot at feed, but need more than 3 cm behind FW in these areas.

11

PFC panel / rib detail

Details for one concept for panel attachment developed with BFG Aerospace

Plasma

Vacuum vessel

Heated / Cooled RibThermally insulated connection to vessel

Panel installed

Panel ass’y retracted