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

University of Auckland: Growth-Induced Bending of 3D Printed Samples Based on PET-RAFT Polymerization

China: 3D Printed Vertebral Body Used to Reconstruct Upper Cervical Spine of 9 Patients



Categories

3D Design

3D Printed Art

3D Printed Food

3D Printed Guns


You May Also Like

3D Printing Review in Drug Delivery Systems: Pharmaceutical Particulates and Membranes

Researchers from Egypt, India, and the UK are studying the role of 3D printing in drug delivery systems. Their findings are detailed in the recently released ‘Pharmaceutical Particulates and Membranes...

Malaysia: Comparing 3D Printed and Conventionally Manufactured Ankle-Foot Orthoses

An ankle-foot orthosis (AFO) is a support brace, or splint, that surrounds the region above the ankle down to the foot, and is used to treat disorders like foot drop...

3D Scanning & 3D Printing Used in Digital Workflow to Design & Build Custom Neck Orthosis

Custom orthotics made through conventional manufacturing methods require casting, sculpting, molding, and fitting to be completed before they’re ready for the patient to wear. It can take up to six...

Characterization of Conventionally Manufactured & 3D Printed Acetabular Cup Implants

The use of 3D printed porous titanium implants in the orthopaedics field is growing, as they feature a similar design to components manufactured with traditional methods, but have a better...


Shop

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


Subscribe To Our Newsletter

Subscribe To Our Newsletter

Join our mailing list to receive the latest news and updates from our 3DPrint.com.

You have Successfully Subscribed!