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

3
• Connect the auxiliary coil to the alternating
current source.
• Connect the Helmholtz coils to the function
generator and choose a sinusoidal wave form.
• Apply a voltage to the anode between 2 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.
5.4 Deflection in collinear alternating mag-
netic and electric fields
The following equipment is also required:
1 Function generator FG100 (115 V, 50/60 Hz)
1009956
or
1 Function generator FG100 (230 V, 50/60 Hz)
1009957
1 AC Power supply unit with an output of up to
250 V AC
Note: In this set-up the anode must be con-
nected to ground potential!
Caution! Contact-hazardous voltages may be
present at the connection field of the tube
holder.
• Set up the experiment as in fig. 6.
• Connect the Helmholtz coils to the function
generator and choose a sinusoidal signal.
• Apply a voltage to the anode between 2 kV
and 5 kV.
• Apply an alternating voltage of about 200 V
to the deflection plates 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