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3B Scientific™ Fine Beam Tube
For examining the deflection of electron beams in a uniform magnetic field using a pair of Helmholtz coils and for the quantitative determination of the specific charge of the electron.
Supplier: 3B Scientific™ U8557540
Description
The gas atoms are ionized along the electron path and produce a sharply defined, visible fluorescent beam. The tube is mounted on a base with color coded connectors.
Experiment topics:
- Deflection of electrons in a closed circular path inside a magnetic field
- Determination of specific charge of an electron e/m
- an indirectly heated oxide cathode
- a Wehnelt cylinder and a perforated anode
- residual gas atmosphere with set gas pressure
- integrated measurement marks for parallax-free measurements
- Gas filling: Neon
- Gas pressure: 1.3 x 10-5 hPa
- Filament voltage: 4 to 10V AC/DC
- Filament current: 300 to 450mA
- Wehnelt voltage: 0 to -50V
- Anode voltage: 200 to 300V
- Anode current: <0.3mA
- Circular path diameter: 20 to 120mm
- Division spacing: approx. 20mm
- Tube diameter: approx. 160mm
Specifications
| Fine Beam Tube | |
| 26 cm | |
| 1.5 lb. | |
| <0.3mA, <150mA | |
| 16 cm | |
| Indirectly heated Oxide cathode, wehnelt cylinder and a perforated anode, residual Gas atmosphere with set Gas pressure, integrated measurement marks for parallax-free measurements, 16cm dia. tube mounted on a base with color coded connectors |
| 10.2 in. | |
| 4 to 10 VAC/VDC (filament), 0 to 50 V (fehnelt), 200 to 300 V (anode) | |
| 0.7 kg | |
| 1.3 x 10-5 hPa | |
| 6.2 in. |
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