For investigating electron beams in electric and magnetic fields and
determining specific charge e/m through compensation of magnetic
deflection by electrostatic deflection. 

Also for estimating the speed of
electrons. 

The integrated plate capacitor allows electron beams to be deflected
electrostatically and – by using a set of demonstration Helmholtz coils–
magnetically. 

The path taken by the electron beams is rendered visible
on a fluorescent screen with a centimeter grid inclined by 15° with
respect to the beam axis. Equipped with an integrated focusing
electrode system. 

 Electron beam deflection tube 

Heating: < 7.5 V AC/DC 

Anode voltage: 1000 V to 5000 V 

Anode current: typically 1 mA

 
Capacitor voltage: max. 5000 V 

Fluorescent screen: 90 mm x 60 mm 

Glass bulb: approx. 130 mm Ø

Total length: approx. 260 mm 

Tube holder : 250 x 160 x 300 mm 

Helmholtz coil : 320turn coil, dia.136mm

 DC Power supply(1) : 30V 3A
Kilovoltage power supply(2) : 15KV, 10mA(max)

Lead wire set

 Connect Jack(3)