Inkbit

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

Eplus3D

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

3D Printing Webinar & Event Roundup: May 28, 2023

3D Printing News Briefs, May 27, 2023: Contract, Acquisition, Movie Prop, & More



Categories

3D Design

3D Printed Art

3D Printed Food

3D Printed Guns


You May Also Like

3D Printing News Briefs, May 25, 2023: Post-Processing, Osteoarthritis, & More

We’re starting out with business in 3D Printing News Briefs today, as Exentis appointed Eric Bert the President of Exentis Americas, and 3YOURMIND announced Alexandre Donnadieu has been promoted to...

Featured

Stratasys and Desktop Metal to Merge in $1.8 Billion Deal

After US stock markets closed on Wednesday, May 25, Bloomberg reported that “people familiar with the matter” told the website that 3D printing industry pioneer Stratasys (Nasdaq: SSYS) was “in...

Zeda Opens 3D Printing Facility in Cincinnati to Serve Regulated Industries

Today, California-based Zeda, Inc. announced that it has officially opened the doors to its new 75,000-square-foot advanced manufacturing facility in Cincinnati, Ohio. The company, which rebranded to Zeda from PrinterPrezz...

Featured

US and Australia Form Clean Energy Pact as WTO Head Calls for “Reglobalized” Supply Chains

Amidst the G7 summit in Hiroshima last weekend, CNBC interviewed the Director-General of the World Trade Organization (WTO), Ngozi Okonjo-Iweala, concerning her general outlook on the current state of international...