Berkeley Lab

Primary Program Element 1: High Field Dipoles

We aim to demonstrate the feasibility of an Nb3Sn magnet with a bore field of 16 T (at 90% of the conductor limit) with a bore greater than or equal to 50 mm. We are taking two complementary approaches: building a reference design based on the well-understood cosine-theta geometry traditionally used for accelerator magnets, and aggressively investigating innovative designs that may prove to have better performance at a lower cost. More…

Reference design based on the cosine-theta concept

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Cross section of 15-T cosine-theta dipole.

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Support structure for 15-T dipole.

A new cosine-theta design incorporating the latest superconductor and structure improvements should attain 16 T with a 50 mm aperture and will serve as a reference design for the program: an apex implementation of the presently mainstream approach. More…

Innovative designs

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We will explore novel approaches (initially emphasizing Canted Cosine Theta, shown at left) that hold the promise of two key attributes. One is addressing accumulation of Lorentz forces and resulting high mechanical stresses, so as to reduce “training” and quenches. The other is reducing the cost per tesla-meter (the measure of such a magnet’s cost-effectiveness). When sufficient experience has been gained through this program and the parallel technology development component of the USMDP, there will be a down-select or branch point to an alternative design path. More…

To Learn More…

Click here to get detailed information on these topics, view a chart of schedules and milestones, and meet the management team for this program element.