Demonstrate the negative polarity of electron beams through magnetic and electric deflection of the beams toward a laterally positioned Faraday cage connected with an electroscope. This tube also enables students to study electron beams in two perpendicularly aligned magnetic alternating fields (operation of a cathode-ray oscilloscope and Lissajous figures), and then estimate the specific electron charge e/m. Tube includes a fluorescent screen. The Tube Holder (WLS-1802-62), Helmholtz Coils (WLS-1802-63), and Power Supply (WLS-1802-07), required, are available separately. The Auxiliary Coil (WLS-1802-64) is also recommended. Size: 12 x 12 x 25cm; weight: 1.5 lbs. Specifications: Cathode heating voltage: Uh < 7.5 V, Ih = approx. 0.35 A Anode voltage: Ua < 5 kV Anode current: typically Ia = 150{mu lower case}A at Ua= 4.5 kV Beam current: typically Ia = 4 {mu lower case}A at Ua= 4.5 kV Deflection voltage: U < 350 V
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