NMR Mandhala Gradient

###NOTE: The most up-to-date version of this thing is [available here.](https://www.thingiverse.com/thing:3799946)

#####These are two parts of a gradient to be used with a Halbach Mandhala. The angle of the two gradient pieces relative to each other changes the gradient strength along the external homoegeneous field provided by the Mandhala.

This Thing has two distinct pieces that are designed to work together:

**Top**
+ 8cm inner diameter, 10cm outer diameter
+ 4 1/2" x 1/4" x 1" slots for [N42 magnet (poles on tall, narrow sides)](https://www.kjmagnetics.com/proddetail.asp?prod=BX048)

**Bottom**
+ 8cm inner diameter, 10cm outer diameter
+ 4 1/2" x 1/4" x 1" slots for [N42 magnet (poles on large faces)](https://www.kjmagnetics.com/proddetail.asp?prod=SB8X04-IN)

NOTE: The N42 magnets for the two pieces are different. See the third photo for the directions of the magnetization for the different magnets in order to generate a quadrupolar field.

This design is bas