Magnet holder D

Figure 5:

$\begin{array}{c@{\hspace{0.5in}}c} \includegraphics{figures/mag_hold.eps} & \includegraphics{figures/mag_hold_pic.eps} \end{array}$

1. 93 wide, 100 mm high.
2. A recess from the upper edge 55 mm tall and 14 mm wide.
3. On both sides a 5.5 mm hole, 55 mm from the upper edge, into which 40 mm M6 bolts are screwed in. The tip of each bolt needs to be filed flat.
4. Two rectangular neodymium magnets (8×5×3 mm³) are held in place magnetically to
5. the bolt tips.

For a horizontal magnetic field, the Magnet Holder is held vertically by two small clamps (see photographs). It can easily be moved along the string, and can also be rotated 90 degrees for a vertical magnetic field.