NMR Mandhala Gradient

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These are two distinct parts of a gradient to be used with a Halbach Mandhala, designed to work together seamlessly. The angle of the two gradient pieces relative to each other changes the gradient strength along the external homogeneous field provided by the Mandhala. This design has two key components that are meant to be used in tandem: **Top** + 8cm inner diameter, 10cm outer diameter + 4 1/2" x 1/4" x 1" slots for N42 magnet (poles on tall, narrow sides) **Bottom** + 8cm inner diameter, 10cm outer diameter + 4 1/2" x 1/4" x 1" slots for N42 magnet (poles on large faces) Note: The N42 magnets used in the two pieces are different. For optimal results, refer to the third photo to understand the correct orientation of the magnetization for each type of magnet. This design is inspired by an article published by Peter Blümler titled "Permanent Magnet System for MRI with Constant Gradient mechanically adjustable in Direction and Strength." The third photo provided is a representation of Figure 5 from this article, which can be accessed at https://www.researchgate.net/publication/282790159_Permanent_Magnet_System_for_MRI_with_Constant_Gradient_mechanically_adjustable_in_Direction_and_Strength. To use this gradient effectively, place the bottom piece over the Halbach Mandhala and then slide the top gradient into the open spaces in the bottom. Adjusting the top gradient will change the strength of the gradient. The maximum gradient strength is achieved when all magnets are aligned at 45-degree increments. This design was created by Jeremiah O'Mahony, Nick Torres, and Ken Zhu with guidance from Merideth Frey, PhD, in Yonkers, New York.