Hall probe Location on top or bottom of the inside of the Window Frame should detect field By up along the +y-axis for the e-beam to experience a force Fx along the +x-axis y Electron beam into the slide along +Z-axis By up x Fx along the +x-axis Summary: if you place the hall probe it should detect field UP for the e-beam to bend along the +x axis.

Hall probe Location on left or right of the inside of the Window Frame should detect Bx field along the –x-axis for the e-beam to experience a force Fy up along the +Y-axis +y Electron beam into the slide along +z-axis Bx along -x-axis x Fy along the +y-axis Summary: if you place the hall probe it should detect field to the right for the e-beam to bend along the +y axis UP.