3B Scientific Teltron Perrin Tube D - Manual (Page 3)

3
1 Function generator FG100 (115 V, 50/60 Hz)
1009956
or
1 Function generator FG100 (230 V, 50/60 Hz)
1009957
• Set up the experiment as in fig. 4.
• Place the auxiliary coil on the upper fork of
the tube holder. Push the jaw clamp over the
lip of the coil to secure it in place.
• Connect the auxiliary coil to the alternating
current source.
• Connect the Helmholtz coils to the function
generator and choose a sinusoidal signal.
• Apply a voltage to the anode between 3 kV
and 5 kV.
• Apply an alternating voltage up to 15 V to
the auxiliary coil and observe the horizontal
deflection.
• Set a frequency of e.g. 50 Hz at the function
generator, vary the amplitude of the sine-
signal and observe the Lissajous figures on
the fluorescent screen.
DC POWER SUPPLY 0 ... 5 kV
0
1 2 3 4
5
KV
0 ... 5 kV
Z
A
U
F
U
A
0 1 2 3
4
5
6
Z
A
-
Fig. 1 Evidence of the particle nature of cathode beam and establishment of their polarity
r
Fig. 2 Definition of the curvature radius r