SE-9654
Zeeman Effect Experiment
14
012-14266B
9. Adjust the two black X - Y adjustment screws on the collimating lens side of the assembly so the polarizer is roughly par-
allel to the collimating lens plane. Do this by adjusting the gap between the collimating lens holder and the polarizer
holder. (The polarizer is then roughly parallel to the axis of the electromagnet.)
10. Rotate the polarizer so that the 90 degree mark on the rim of the polarizer is aligned with the white indicator mark at the
top of the assembly.
11. Position the polarizer/lens assembly at the 30 cm mark on the track.
12. The glass envelope of the pen-type mercury lamp has wires up two sides. Looking through the lens, rotate the mercury
lamp in its holder until the wires are out of the line of sight. NOTE: It helps to back-light the mercury lamp with a flash-
light (see Figure 10).
Mount the Interferometer and Filter
1. Screw the 546.1 nm (nanometer) filter onto one end of the interferometer.
Put the interferometer/filter assembly into the second precision kinematic
optical mount (see Figure 11).
2. Complete the assembly by fastening a post to the bottom of the kinematic
optical holder, and then inserting the post into a second adjustable post
holder. Screw the adjustable post holder into one of the optical carriers.
3. Mount the optical carrier of the interferometer assembly in the middle the
track so that the three adjustment screws on the interferometer face away
from the electromagnet.
4. Adjust the interferometer assembly in a manner similar to adjusting the
polarizer/lens assembly. First, loosen the two thumbscrews on the adjust-
able post holder. Raise the interferometer assembly so it is approximately at
the same height as the lens assembly.
5. Hold a book vertically against the base of the optical carrier. Rotate the assembly so that both of the black X - Y adjust-
ment screws on the filter side of the assembly touch the book as shown before. Tighten the upper thumbscrew.
6. Position the interferometer assembly on the track so that the white indicator mark on the optical carrier is at 40 cm on the
track scale.
7. Using the silver adjuster ring on the adjustable post holder, adjust the height of the assembly until its center (as indicated
by the horizontal white mark on the kinematic optical holder) is at the height of the axial iron core plug measured before.
Tighten the lower thumbscrew.
8. Adjust the two black X - Y adjustment screws on the filter side of the assembly so that the interferometer is roughly paral-
lel to the filter. Do this by adjusting the gap between the interferometer part of the holder and the filter part of the holder.
Connect Power to the Mercury Lamp and the Electromagnet
1. Plug the white plugs from the mercury lamp into the 1500 V outputs on the DC power supply.
2. Plug the red and black connecting cords between the red and black jacks on the electromagnet and the red and black out-
put ports on the power supply. (The next step is to turn on the power supply.)
CAUTION
:
Do not run the power supply at 3 A for more than 30 minutes or at 4 A for more than two min-
utes. Heat generated by the electromagnet will cause a built-in thermal switch to open, which will turn off
Set Screw
X - Y
Adjustment
Screw
546.1 nm
Filter
Interferometer
X - Y
Adjustment
Screw
Figure 10: Interferometer/Filter Assembly
