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ELECTRON DEFLECTION TUBE SYSTEM 
Details

ELECTRON DEFLECTION TUBE SYSTEM

Objects
Thermionic emission of electrons
Deflection of electrons in electron and magnetic field
Estimate of specific change of an electron e/m

Principles
The electron-beam deflection tube is intended for investigating the deflection of electron beams in electrical and magnetic fields. It can be used to estimate the specific charge of an electron e/m and to determine the electron velocity v. The electron-beam deflection tube comprises an electron gun which emits a narrow, focused ribbon of cathode rays within an evacuated, clear glass bulb. A tungsten filament hot cathode is heated directly and the anode takes the form of a cylinder. The deflection of rays can be achieved electrostatically by means of a built-in plate capacitor formed by the pair of deflection plates or magnetically with the help of the Helmholtz coils (P338002) magnetically.
The cathode rays are intercepted by a flat mica sheet, one side of which is coated with a fluorescent screen and the other side of which
is printed with a centimeter graticule so that the path of the electrons can be easily traced. The mica sheet is held at 15 degree to the
axis of the tube by the two deflecting plates.  



SYSTEM D1 - ELECTRON DEFLECTION TUBE IN MAGNETIC FIELD




SYSTEM COMPOSITON
1 pc
1 pc
1 pc
1 pc
1 pc
Electron deflection tube
Helmholtz pair of coils
Tube holder
DC power supply
DC power supply

P318003
P338002
P348001
M10-HV5000A
M30-SP303E



SYSTEM D2 - ELECTRON DEFLECTION TUBE IN ELECTRO STATIC FIELD



SYSTEM COMPOSITON
1 pc
1 pc
1 pc
Electron deflection tube
Tube holder
DC power supply
P318003
P348001
M10-HV5000A


ELECTRON DEFLECTION TUBE P318003
Filament voltage:
Max. anode voltage:
Anode current:
Max. capacitor voltage:
Tube diameter:
Total length:
Weight:
6.3V AC
5000V
approx. 0.1mA at 4000V
5000V
130mm
240mm
0.3kg


P318003