Princeton Plasma Physics Laboratory Uses 3D Printing to Produce Parts for Microwave Launchers

Share this Article

As part of his daily work as a scientist at the Princeton Plasma Physics Laboratory (PPPL), Bob Ellis sometimes fields calls from organizations like the Korea Supercomputing Tokamak Advanced Research (KSTAR) facility. In this case, the need was for a water-cooled fixed mirror with an ability to stand up under intense heat for as long as five minutes as microwave beams are directed from launchers in order to fuel fusion reactions through heated plasma.

And that’s exactly the sort of thing that is right up Ellis’ alley.

14E1008_41

Ellis examines the plastic prototype for his mirror design.

Ellis has experience building mirrors that don’t use coolant for use in shorter experiments and that history led him to believe that 3D printing would be the best approach to creating this new component. What was new for Ellis was the approach of using 3D printing to create a metal component. Head of the Mechanical Engineering Division at PPPL, Phil Heitzenroeder, explained the decision to utilize metal printing, something that PPPL had not previously done:

“Metal came into 3D printing about five years ago and was sort of exotic then. Now 3D is beginning to drift down into real-world metal products.”

laser-meltWhile this may be the case, to most people, the creation of water-cooled mirrors capable of heating plasma to fuel fusion reactions may still seem somewhat other-worldly. In any case, the ability of 3D printing to create metal components that do not require much to finish their processing and are generated as a unified whole made it the ideal approach for such a high-stress component.

The first step was the creation of a CAD-CAM model that delineated the form of the shoebox-sized system. The model was then sent to Imperial Machine and Tool for production in stainless steel and copper via 3D printing. The 70-year-old machining company has embraced additive manufacturing technologies alongside its traditional metal working equipment. The president of the company, Christian Joest, reported that the system took approximately 20 hours to produce, from the addition of the talcum-powder-like substance to the printer to its removal from the machine.280HL

For this particular component, 3D printing was a perfect fit as it otherwise would have had to be produced in several pieces and then assembled. Those assembly points would create possibilities for weakness and would have required that the cooling channels could be drilled before assembly. Instead, a thin sheet of polished copper was layered directly on top of a base of stainless steel in a form that integrated the water cooling channels necessary for the component’s function.

KSTAR has been so satisfied with the result that they have come back to Ellis again to design a mirror that can be steered by computer in order to direct microwaves into particular areas of the heated plasma.  What do you think about this technology?  Discuss in the Microwave Launcher forum thread on 3DPB.com.

Share this Article


Recent News

VELO3D’s Metal 3D Printers Bought by Two Aerospace Customers

Wayland Additive Sells Electron Beam Metal 3D Printer to First Customer



Categories

3D Design

3D Printed Art

3D Printed Guns

3D Printer Reviews


You May Also Like

Featured

An Unforgettable AMUG | 3D Printing Leadership Redefined in 2021

“Please wear a mask in public spaces,” the Hilton Hotel lobby signage makes it pretty clear upon arrival that they want their guests to feel comfortable and safe while on...

Laser Wars: ScanLAB to Democratize Powder Bed Fusion?

We’ve all been a party to the laser wars, in which a tiny clique of powder bed fusion firms are outdoing each other on seeing how many lasers they can...

FIT AG and pro-beam Team up for (DED & PBF) Electron Beam Metal 3D Printing

The world of electron beam 3D printing is suddenly becoming larger. Whereas it was previously dominated by a single company, GE’s Arcam, there have been a number of new entrants...

AZO and AddUp Partner to Automate Powder Handling for Metal 3D Printing

Metal powders are some of the most finicky materials in the 3D printing industry in that, not only do the metal particles require a high level of consistency, sphericity, and...


Shop

View our broad assortment of in house and third party products.