August 9, 2006 Design, Fabrication and Maintenance Considerations of Blanket Options for Magnetic...
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![Page 1: August 9, 2006 Design, Fabrication and Maintenance Considerations of Blanket Options for Magnetic Intervention G. Sviatoslavsky, I.N. Sviatoslavsky, M.](https://reader034.fdocuments.us/reader034/viewer/2022051820/56649f525503460f94c75b1b/html5/thumbnails/1.jpg)
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),
![Page 2: August 9, 2006 Design, Fabrication and Maintenance Considerations of Blanket Options for Magnetic Intervention G. Sviatoslavsky, I.N. Sviatoslavsky, M.](https://reader034.fdocuments.us/reader034/viewer/2022051820/56649f525503460f94c75b1b/html5/thumbnails/2.jpg)
August 9, 2006 Fusion Technology Institute 2
Outline
• Magnetic intervention chamber design
• Chamber maintenance
• SiC blanket module fabrication
• External dump housing concept
• Flibe blanket concepts
![Page 3: August 9, 2006 Design, Fabrication and Maintenance Considerations of Blanket Options for Magnetic Intervention G. Sviatoslavsky, I.N. Sviatoslavsky, M.](https://reader034.fdocuments.us/reader034/viewer/2022051820/56649f525503460f94c75b1b/html5/thumbnails/3.jpg)
August 9, 2006 Fusion Technology Institute 3
Outline
• Magnetic intervention chamber design
• Chamber maintenance
• SiC blanket module fabrication
• External dump housing concept
• Flibe blanket concepts
![Page 4: August 9, 2006 Design, Fabrication and Maintenance Considerations of Blanket Options for Magnetic Intervention G. Sviatoslavsky, I.N. Sviatoslavsky, M.](https://reader034.fdocuments.us/reader034/viewer/2022051820/56649f525503460f94c75b1b/html5/thumbnails/4.jpg)
August 9, 2006 Fusion Technology Institute 4
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
![Page 5: August 9, 2006 Design, Fabrication and Maintenance Considerations of Blanket Options for Magnetic Intervention G. Sviatoslavsky, I.N. Sviatoslavsky, M.](https://reader034.fdocuments.us/reader034/viewer/2022051820/56649f525503460f94c75b1b/html5/thumbnails/5.jpg)
August 9, 2006 Fusion Technology Institute 5
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)
![Page 6: August 9, 2006 Design, Fabrication and Maintenance Considerations of Blanket Options for Magnetic Intervention G. Sviatoslavsky, I.N. Sviatoslavsky, M.](https://reader034.fdocuments.us/reader034/viewer/2022051820/56649f525503460f94c75b1b/html5/thumbnails/6.jpg)
August 9, 2006 Fusion Technology Institute 6
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)
![Page 7: August 9, 2006 Design, Fabrication and Maintenance Considerations of Blanket Options for Magnetic Intervention G. Sviatoslavsky, I.N. Sviatoslavsky, M.](https://reader034.fdocuments.us/reader034/viewer/2022051820/56649f525503460f94c75b1b/html5/thumbnails/7.jpg)
August 9, 2006 Fusion Technology Institute 7
Outline
• Magnetic intervention chamber design
• Chamber maintenance
• SiC blanket module fabrication
• External dump housing concept
• Flibe blanket concepts
![Page 8: August 9, 2006 Design, Fabrication and Maintenance Considerations of Blanket Options for Magnetic Intervention G. Sviatoslavsky, I.N. Sviatoslavsky, M.](https://reader034.fdocuments.us/reader034/viewer/2022051820/56649f525503460f94c75b1b/html5/thumbnails/8.jpg)
August 9, 2006 Fusion Technology Institute 8
Chamber Maintenance Scheme
Remove Pole Shield Remove Upper Shield Remove Ring Cusp Sections Remove Blanket Modules
![Page 9: August 9, 2006 Design, Fabrication and Maintenance Considerations of Blanket Options for Magnetic Intervention G. Sviatoslavsky, I.N. Sviatoslavsky, M.](https://reader034.fdocuments.us/reader034/viewer/2022051820/56649f525503460f94c75b1b/html5/thumbnails/9.jpg)
August 9, 2006 Fusion Technology Institute 9
Outline
• Magnetic intervention chamber design
• Chamber maintenance
• SiC blanket module fabrication
• External dump housing concept
• Flibe blanket concepts
![Page 10: August 9, 2006 Design, Fabrication and Maintenance Considerations of Blanket Options for Magnetic Intervention G. Sviatoslavsky, I.N. Sviatoslavsky, M.](https://reader034.fdocuments.us/reader034/viewer/2022051820/56649f525503460f94c75b1b/html5/thumbnails/10.jpg)
August 9, 2006 Fusion Technology Institute 10
Blanket Sub-ModuleCross-
SectionsA
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
![Page 11: August 9, 2006 Design, Fabrication and Maintenance Considerations of Blanket Options for Magnetic Intervention G. Sviatoslavsky, I.N. Sviatoslavsky, M.](https://reader034.fdocuments.us/reader034/viewer/2022051820/56649f525503460f94c75b1b/html5/thumbnails/11.jpg)
August 9, 2006 Fusion Technology Institute 11
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)
![Page 12: August 9, 2006 Design, Fabrication and Maintenance Considerations of Blanket Options for Magnetic Intervention G. Sviatoslavsky, I.N. Sviatoslavsky, M.](https://reader034.fdocuments.us/reader034/viewer/2022051820/56649f525503460f94c75b1b/html5/thumbnails/12.jpg)
August 9, 2006 Fusion Technology Institute 12
Outline
• Magnetic intervention chamber design
• Chamber maintenance
• SiC blanket module fabrication
• External dump housing concept
• Flibe blanket concepts
![Page 13: August 9, 2006 Design, Fabrication and Maintenance Considerations of Blanket Options for Magnetic Intervention G. Sviatoslavsky, I.N. Sviatoslavsky, M.](https://reader034.fdocuments.us/reader034/viewer/2022051820/56649f525503460f94c75b1b/html5/thumbnails/13.jpg)
August 9, 2006 Fusion Technology Institute 13
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
![Page 14: August 9, 2006 Design, Fabrication and Maintenance Considerations of Blanket Options for Magnetic Intervention G. Sviatoslavsky, I.N. Sviatoslavsky, M.](https://reader034.fdocuments.us/reader034/viewer/2022051820/56649f525503460f94c75b1b/html5/thumbnails/14.jpg)
August 9, 2006 Fusion Technology Institute 14
External Dump Concept
Extended Ring Cusp Dump
Extended Toroidal Dump Housing (independently pumped)
Support Columns
Magnets
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August 9, 2006 Fusion Technology Institute 15
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
![Page 16: August 9, 2006 Design, Fabrication and Maintenance Considerations of Blanket Options for Magnetic Intervention G. Sviatoslavsky, I.N. Sviatoslavsky, M.](https://reader034.fdocuments.us/reader034/viewer/2022051820/56649f525503460f94c75b1b/html5/thumbnails/16.jpg)
August 9, 2006 Fusion Technology Institute 16
Outline
• Magnetic intervention chamber design
• Chamber maintenance
• SiC blanket module fabrication
• External dump housing concept
• Flibe blanket concepts
![Page 17: August 9, 2006 Design, Fabrication and Maintenance Considerations of Blanket Options for Magnetic Intervention G. Sviatoslavsky, I.N. Sviatoslavsky, M.](https://reader034.fdocuments.us/reader034/viewer/2022051820/56649f525503460f94c75b1b/html5/thumbnails/17.jpg)
August 9, 2006 Fusion Technology Institute 17
Sub-module cross-sections for two Flibe blanket conceptsBe balls contained
in a SiC screen Be rods
SiC screen containing Be balls
RestraintsFirst Wall First Wall
• 3 cm effective Be zone• 55% Be, 35% Flibe,
10% SiC
Both Concepts
Be rods
![Page 18: August 9, 2006 Design, Fabrication and Maintenance Considerations of Blanket Options for Magnetic Intervention G. Sviatoslavsky, I.N. Sviatoslavsky, M.](https://reader034.fdocuments.us/reader034/viewer/2022051820/56649f525503460f94c75b1b/html5/thumbnails/18.jpg)
August 9, 2006 Fusion Technology Institute 18
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
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August 9, 2006 Fusion Technology Institute 19
Final Thoughts
Designing a chamber for magnetic intervention is challenging …
… Genius 99% perspiration …
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