3B Scientific Teltron Luminescence Tube S - Manual

3B SCIENTIFIC® PHYSICS
1
Luminescence Tube S 1000615
Instruction sheet
12/12 ALF
1 2 3 4 5 6
6.4
7
6.1
6.2
6.3
1 Guide pin
2 Connection pins
3 Heater filament
4 Cathode
5 Anode
6 Luminescence screen
6.1 Zinc sulfide, activated with
silver
6.2 Yttrium vanadate, activated
with europium
6.3 Zinc sulfide, activated with
silver and cobalt
6.4 As 6.3 but graphite-coated
back to prevent heat radiation
7 4-mm plug for luminescence
screen
1. Safety instructions
Hot cathode tubes are thin-walled, highly evacu-
ated glass tubes. Treat them carefully as there
is a risk of implosion.
• Do not subject the tube to mechanical
stresses.
• Do not subject the connection leads to any
ten- sion.
• The tube may only be used with tube holder
S (1014525).
If voltage or current is too high or the cathode is
at the wrong temperature, it can lead to the tube
becoming destroyed.
• Do not exceed the stated operating parame-
ters.
• Only use safety experiment leads for con-
nect-ing circuits.
• Only change circuits with power supply
equipment switched off.
• Only exchange tubes with power supply
equipment switched off.
When the tube is in operation, the stock of the
tube may get hot.
• Allow the tube to cool before dismantling.
The compliance with the EC directive on elec-
tromagnetic compatibility is only guaranteed
when using the recommended power supplies.
2. Description
The luminescence tube serves to demonstrate
the luminescence of a phosphorous anode when
excited by electrons (cathodoluminescence) or
ultraviolet light (photoluminescence).
The luminescence tube is a highly evacuated
tube with an electron gun consisting of a pure
tungsten heater filament inside an apertured
“cathode can” and a cylindrical anode contained
in a clear glass bulb. A luminescence screen
with three mica flags with different phosphors is
mounted on a metal support.