In the case of tangential bombardment and a perpendicularly aligned magnetic field, the fundamental electron charge-to-mass ratio can be determined from the diameter of the observed beam pattern.
Dual Beam Tube D
Semi-evacuated electron tube filled with low-pressure helium and containing a tangential and axial electron gun.
In the case of axial bombardment and a co-axial magnetic field, kinetic gas theory (e.g. impact excitation) and particle collisions can be studied through observations of the
fine, luminescent beams resulting from excitation of the helium atoms. Product includes tube only. Instructions included.
EHT Power Supply
Digital Meter with two shunts included

Max. anode voltage: 300 V DC
Max. filament voltage: 7.5 V
Anode current: approx. 30 mA at 200 V (anode)
Max. deflection voltage: 50 V DC.

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