Further Modifications to the ARIES T-tube Divertor Concept Jeremy Burke ARIES-Pathways Project Meeting Jan 26,

Summary of past work Design modifications Parameter design windows Detailed CFD analysis Detailed thermo-mechanical analysis Armor analysis Neutron irradiation effects 2

Design Modifications Inner cartridge tapered from 10 mm to 2.5 mm Armor thickness varied to determine effect Slot width varied to find optimal 3

Parameter Design Windows (Stress) 4

(Pressure Drop) 5

(Temperature) 6

Armor Thickness Compared two values for armor thickness 5 mm and 1 mm Determine effects of having more armor 5 mm caused a drop in max heat flux of ~3-5% Neutron Irradiation Will reduce thermal conductivity ~5-10% Want to determine how much this effects max heat flux Reduction of ~6% with a 10% reduction in thermal conductivity 7

Current work Further Design Modifications Steel cartridge Flow diverter in cartridge Detailed tapper Inlet/Outlet conditions Pumping power curves Joint analysis 8

Design Modifications DBTT temp of W ~ 700 C Currently inlet temp = 600 C Modify cartridge and outer wall design so that all materials are within proper temperature limits Steel cartridge Flow diverter Non-linear taper 9

Modified Outer Wall 10 Will make joint design much easier Steel cartridge will connect directly to manifold Inner walls removed Need a spacer to keep cartridge in place

Pumping Power Curves Tested 3 cases of inlet and outlet temperatures 600°C inlet – 677°C outlet 623°C inlet – 700°C outlet 650°C inlet – 700°C outlet Tapered cartridge 450 micron slot 1 mm armor 11

Pumping Power Fraction vs. Surface Heat Flux 12

Corresponding Temperature vs. Surface Heat Flux 13

Joint Analysis With the modified outer wall and cartridge, designing a transition joint will be much simpler Will be based on the plate joint Tungsten Tantalum Steel 14