====Modified Halbach Arrays====
José Borges de Almeida
Universidade do Minho
Physics Department
[[josebda@gmail.com]]

**Description**

This Octave script models an infinite double layer of modified magnet arrays to produce a very strong trapezoidal field in the inter-magnet space. There are a number of user definable parameters and true Halbach arrays can be obtained by setting ''interMagnet = 0''. Halbach arrays are unstable and the magnets must be bound to backing plates in order to stay in place; in this model the backing plates are made of 1 mm thick steel but they could be made of non ferromagnetic material in the case of true Halbach arrays.

{{:upload:images:halbachfig1.png|HalbachFig1.png}}\\
Fig. 1 One module of the infinite Halbach array.

{{:upload:images:halbachfig2.png|HalbachFig2.png}}\\
Fig. 2 Normal flux density plot.


  * {{:upload:halbachexample:drawmagnet.m|drawMagnet.m}}
  * {{:upload:halbachexample:halbachgen.m|halbachgen.m}}