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Scientific Instruments, Specimens, Books and Collectables

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  • Fine Beam Electron Tube for Weighing the Electron

    Fine Beam Electron Tube for Weighing the Electron

    Fine Beam Electron Tube with Helmholtz Coils of German manufacture likely in the 1960′s

    High Quality, Large Fine Beam Electron Tube with a Pair of Helmholtz coils on original demonstration stand. This device can be used in atomic physics for determining the charge-to-mass ratio e/m of the electron. The device can also be used for other experiments on the electrostatic and magnetic deflection of electron beams. The tube is hydrogen filled with an indirectly heated oxide cathode. The Pressure in the Tube is so adjusted that the electron beam produced remains sharply focused along its entire length at an anode Voltage of 200-300 Volts. The Helmholtz coils consist of 2 circular coils each of 150 Turns and 150mm radius arranged parallel to each other.

    Important Scientific Instrument

    $490.00

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