f l i r e flowing liquid-surface illinois retention experiment critical design considerations
DESCRIPTION
F L I R E Flowing Liquid-Surface Illinois Retention Experiment Critical Design Considerations. Mark Boaz, David N. Ruzic , Ning Li, Jeff Norman and Jean-Paul Allain Department of Nuclear, Plasma, and Radiological Engineering University of Illinois at Urbana Champaign - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: F L I R E Flowing Liquid-Surface Illinois Retention Experiment Critical Design Considerations](https://reader034.vdocument.in/reader034/viewer/2022051018/56813cc9550346895da67233/html5/thumbnails/1.jpg)
F L I R EFlowing Liquid-Surface Illinois Retention
ExperimentCritical Design Considerations
Mark Boaz, David N. Ruzic, Ning Li,
Jeff Norman and Jean-Paul Allain
Department of Nuclear, Plasma, and Radiological Engineering
University of Illinois at Urbana Champaign
October 25, 2000 APS DPP Meeting
![Page 2: F L I R E Flowing Liquid-Surface Illinois Retention Experiment Critical Design Considerations](https://reader034.vdocument.in/reader034/viewer/2022051018/56813cc9550346895da67233/html5/thumbnails/2.jpg)
Outline
Motivation FLIRE Concept Experiment to Address Critical
Concern Results Conclusion Acknowledgements
![Page 3: F L I R E Flowing Liquid-Surface Illinois Retention Experiment Critical Design Considerations](https://reader034.vdocument.in/reader034/viewer/2022051018/56813cc9550346895da67233/html5/thumbnails/3.jpg)
Motivation
Flowing Liquid Metal Walls High heat flux capability Disruption resistant Low Z possible May have new plasma operating regimes
Can helium be removed ? What is the retention of He in liquid
metals?
![Page 4: F L I R E Flowing Liquid-Surface Illinois Retention Experiment Critical Design Considerations](https://reader034.vdocument.in/reader034/viewer/2022051018/56813cc9550346895da67233/html5/thumbnails/4.jpg)
Proposed Experiment
Flow Li down a ramp into a second vacuum system inside the large vacuum system
Have Li flow provide vacuum isolation
Aim He ion beam at flowing Li Look for He in inner chamber with a
He leak detector
![Page 5: F L I R E Flowing Liquid-Surface Illinois Retention Experiment Critical Design Considerations](https://reader034.vdocument.in/reader034/viewer/2022051018/56813cc9550346895da67233/html5/thumbnails/5.jpg)
![Page 6: F L I R E Flowing Liquid-Surface Illinois Retention Experiment Critical Design Considerations](https://reader034.vdocument.in/reader034/viewer/2022051018/56813cc9550346895da67233/html5/thumbnails/6.jpg)
![Page 7: F L I R E Flowing Liquid-Surface Illinois Retention Experiment Critical Design Considerations](https://reader034.vdocument.in/reader034/viewer/2022051018/56813cc9550346895da67233/html5/thumbnails/7.jpg)
![Page 8: F L I R E Flowing Liquid-Surface Illinois Retention Experiment Critical Design Considerations](https://reader034.vdocument.in/reader034/viewer/2022051018/56813cc9550346895da67233/html5/thumbnails/8.jpg)
![Page 9: F L I R E Flowing Liquid-Surface Illinois Retention Experiment Critical Design Considerations](https://reader034.vdocument.in/reader034/viewer/2022051018/56813cc9550346895da67233/html5/thumbnails/9.jpg)
Detectability Limits He leak detectors can see 2.7 x 109 s-1
Ion beam at 1 mA has 1.6 x 1016 s-1
(seven-orders-of-magnitude !)
Flow velocity = 1 m/s Fusion system will have same time in
chamber, 0.01 sec. If 1 ppm is seen, (six-orders-of-magnitude)
minimum observable retention time constant = 25 sec.
![Page 10: F L I R E Flowing Liquid-Surface Illinois Retention Experiment Critical Design Considerations](https://reader034.vdocument.in/reader034/viewer/2022051018/56813cc9550346895da67233/html5/thumbnails/10.jpg)
Critical Questions
Will surface layer with the implanted ions smoothly flow into the inner vacuum chamber or will the liquid metal pool at the opening?
If it does not pool, will a vacuum seal be maintained?
Is having two ramps sufficient to ensure this?
![Page 11: F L I R E Flowing Liquid-Surface Illinois Retention Experiment Critical Design Considerations](https://reader034.vdocument.in/reader034/viewer/2022051018/56813cc9550346895da67233/html5/thumbnails/11.jpg)
Prototype Design
Key is to have flow maintain contact with ramps.
Equation of motion for free flow: y(x) = x - bx2
Measure flow speed, find “b”, cut plywood.
Length of ramp determined by co-joining angle. Experiment, choose 25 degrees.
![Page 12: F L I R E Flowing Liquid-Surface Illinois Retention Experiment Critical Design Considerations](https://reader034.vdocument.in/reader034/viewer/2022051018/56813cc9550346895da67233/html5/thumbnails/12.jpg)
slotted holes in plywood allowed for adjustment of exit size
![Page 13: F L I R E Flowing Liquid-Surface Illinois Retention Experiment Critical Design Considerations](https://reader034.vdocument.in/reader034/viewer/2022051018/56813cc9550346895da67233/html5/thumbnails/13.jpg)
gap from reservoir controlled by teflon insert
![Page 14: F L I R E Flowing Liquid-Surface Illinois Retention Experiment Critical Design Considerations](https://reader034.vdocument.in/reader034/viewer/2022051018/56813cc9550346895da67233/html5/thumbnails/14.jpg)
Exit
width
is
3 mm
![Page 15: F L I R E Flowing Liquid-Surface Illinois Retention Experiment Critical Design Considerations](https://reader034.vdocument.in/reader034/viewer/2022051018/56813cc9550346895da67233/html5/thumbnails/15.jpg)
Assembled FLIRE prototype
![Page 16: F L I R E Flowing Liquid-Surface Illinois Retention Experiment Critical Design Considerations](https://reader034.vdocument.in/reader034/viewer/2022051018/56813cc9550346895da67233/html5/thumbnails/16.jpg)
Note brightness of exit when open
![Page 17: F L I R E Flowing Liquid-Surface Illinois Retention Experiment Critical Design Considerations](https://reader034.vdocument.in/reader034/viewer/2022051018/56813cc9550346895da67233/html5/thumbnails/17.jpg)
5 mm gap from reservoirs is too big !
![Page 18: F L I R E Flowing Liquid-Surface Illinois Retention Experiment Critical Design Considerations](https://reader034.vdocument.in/reader034/viewer/2022051018/56813cc9550346895da67233/html5/thumbnails/18.jpg)
4 mm gap still pools, but then settles down nicely
![Page 19: F L I R E Flowing Liquid-Surface Illinois Retention Experiment Critical Design Considerations](https://reader034.vdocument.in/reader034/viewer/2022051018/56813cc9550346895da67233/html5/thumbnails/19.jpg)
3 mm gap is just right
![Page 20: F L I R E Flowing Liquid-Surface Illinois Retention Experiment Critical Design Considerations](https://reader034.vdocument.in/reader034/viewer/2022051018/56813cc9550346895da67233/html5/thumbnails/20.jpg)
2 mm gap is okay, but some Cu is showing
![Page 21: F L I R E Flowing Liquid-Surface Illinois Retention Experiment Critical Design Considerations](https://reader034.vdocument.in/reader034/viewer/2022051018/56813cc9550346895da67233/html5/thumbnails/21.jpg)
3 mm gap again, different view
![Page 22: F L I R E Flowing Liquid-Surface Illinois Retention Experiment Critical Design Considerations](https://reader034.vdocument.in/reader034/viewer/2022051018/56813cc9550346895da67233/html5/thumbnails/22.jpg)
Conclusion
Through careful design, uniform “folding” flow can be achieved.
FLIRE experiment could determine critical parameters for the ALPS/ APEX programs
![Page 23: F L I R E Flowing Liquid-Surface Illinois Retention Experiment Critical Design Considerations](https://reader034.vdocument.in/reader034/viewer/2022051018/56813cc9550346895da67233/html5/thumbnails/23.jpg)
Acknowledgements
DOE ALPS program Undergraduate Research
Assistants Hussain Nomanbhai Shadi Beidas