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August 9, 2006 Design, Fabrication and Maintenance Considerations of Blanket Options for Magnetic Intervention G. Sviatoslavsky, I.N. Sviatoslavsky, M.

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Presentation on theme: "August 9, 2006 Design, Fabrication and Maintenance Considerations of Blanket Options for Magnetic Intervention G. Sviatoslavsky, I.N. Sviatoslavsky, M."— Presentation transcript:

1 August 9, 2006 Design, Fabrication and Maintenance Considerations of Blanket Options for Magnetic Intervention G. Sviatoslavsky, I.N. Sviatoslavsky, M. Sawan (UW), A.R. Raffray (UCSD),

2 August 9, 2006Fusion Technology Institute2 Outline Magnetic intervention chamber design Chamber maintenance SiC blanket module fabrication External dump housing concept Flibe blanket concepts

3 August 9, 2006Fusion Technology Institute3 Outline Magnetic intervention chamber design Chamber maintenance SiC blanket module fabrication External dump housing concept Flibe blanket concepts

4 August 9, 2006Fusion Technology Institute4 Blanket Design Overview PbLi Coolant Silicon Carbide Blanket structure Maximum FW temperature of 1000°C Maximum allowable PbLi/SiC Temp. 1000°C Concentric channel approach similar to earlier HAPL blanket designs Self-draining blanket modules Maintenance access is via removable shield modules at each pole

5 August 9, 2006Fusion Technology Institute5 Chamber Design Magnets Upper Blanket (single module) Upper-mid Blanket (16 modules) Lower-mid Blanket Lower Blanket Ring Cusp Armored Dump Polar Cusp Armored Dump Shield (50 cm thick)

6 August 9, 2006Fusion Technology Institute6 Chamber Shield (magnets not shown) 50 cm thick water-cooled shield Support I-beams Removable Pole Shield (contains polar cusp dump) Removable Upper Shield (contains upper blanket modules)

7 August 9, 2006Fusion Technology Institute7 Outline Magnetic intervention chamber design Chamber maintenance SiC blanket module fabrication External dump housing concept Flibe blanket concepts

8 August 9, 2006Fusion Technology Institute8 Chamber Maintenance Scheme Remove Pole ShieldRemove Upper ShieldRemove Ring Cusp SectionsRemove Blanket Modules

9 August 9, 2006Fusion Technology Institute9 Outline Magnetic intervention chamber design Chamber maintenance SiC blanket module fabrication External dump housing concept Flibe blanket concepts

10 August 9, 2006Fusion Technology Institute10 Blanket Sub-Module Cross- Sections A A B B C C A-A B-B C-C Concentric variable section channels SiC cooled by high velocity flow in gap Low velocity return flow in center channel

11 August 9, 2006Fusion Technology Institute11 Blanket Sub-Module Fabrication 1. inner channel form 2. Lay-up & infiltrate inner channel 3. Two-piece form fitted over inner channel 4. Lay-up & infiltrate outer channel 5. Consume both forms via chemical or thermal process Issue: Complex concentric walls prevent assembly of inner and outer channels Solution: Expendable core form fabrication (1.5 mm tolerance for un-machined surfaces)

12 August 9, 2006Fusion Technology Institute12 Outline Magnetic intervention chamber design Chamber maintenance SiC blanket module fabrication External dump housing concept Flibe blanket concepts

13 August 9, 2006Fusion Technology Institute13 Ion Ring Cusp Lifetime Concerns Issue 1: Ion ring cusp dump must absorb very high levels of ion energy –See R. Raffray ion dump issues presentation Solution 1: Wetted ring cusp dump surface –Dump surface continuously replenished Issue 2: Vapor interfering with optics, target injection and chamber evacuation Solution 2: Externally Housed Dump

14 August 9, 2006Fusion Technology Institute14 External Dump Concept Extended Ring Cusp Dump Extended Toroidal Dump Housing (independently pumped) Support Columns Magnets

15 August 9, 2006Fusion Technology Institute15 External Dump Issues Coil arrangement to divert ions through slot to external dump Difficulty limiting vapor entering chamber Complicates support of chamber upper half Complicates draining of mid-upper blanket modules

16 August 9, 2006Fusion Technology Institute16 Outline Magnetic intervention chamber design Chamber maintenance SiC blanket module fabrication External dump housing concept Flibe blanket concepts

17 August 9, 2006Fusion Technology Institute17 Sub-module cross-sections for two Flibe blanket concepts Be balls contained in a SiC screen Be rods SiC screen containing Be balls Restraints First Wall 3 cm effective Be zone 55% Be, 35% Flibe, 10% SiC Both Concepts Be rods

18 August 9, 2006Fusion Technology Institute18 Conclusions & Recommendations Chamber maintenance scheme has little/no impact on magnets or lasers Expendable core fabrication viable for concentric channel configuration Concern over armored dump lifetime due to high level of ion energy Wetted ring cusp dump – externally housed –Mitigating chamber vapor introduces other issues Flibe blanket concepts incorporate Be for breeding –Adds complexity to an already complex design

19 August 9, 2006Fusion Technology Institute19 Final Thoughts Designing a chamber for magnetic intervention is challenging … … Genius 99% perspiration … … Got deodorant?

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