Deflection of electrons in a closed circular path inside a magnetic field.
Determination of specific charge of an electron e/m.
For examining the deflection of electron beams in a uniform magnetic field using a pair of Helmholtz coils (1000906) and for the quantitative determination of the specific charge of the electron e/m. Glass vessel with integrated electron beam system, consisting of an indirectly heated oxide cathode, a Wehnelt cylinder and a perforated anode, in neon residual gas atmosphere with precisely set gas pressure and with integrated measurement marks for parallax-free determination of the diameter of the fine beam. Gas atoms are ionized along the electron path and produce a sharply defined, visible fluorescent beam. Tube mounted on base with colour coded connectors.
Gas filling: Neon
Gas pressure: 1.3x10-5 hPa
Filament voltage: 5 – 7 V DC
Filament current: < 350 mA
Wehnelt voltage: 0 – -50 V
Anode voltage: 200 – 300 V
Anode current: < 3 mA
Circular path diameter: 20 – 120 mm
Division spacing: approx. 20 mm
Tube diameter: approx. 160 mm
Dimensions connection base: Ø approx. 103 mm; height: 78 mm
Weight: approx. 820 g
![DC Power Supply 0-500 V, 1003307 [U33000-115], Power Supplies](/thumblibrary/U33000-115/U33000-115_01_140_140_DC-Power-Supply-0-500-V.jpg)
![DC Power Supply 0-500 V (230 V, 50/60 Hz), 1003308 [U33000-230], Power Supplies](/thumblibrary/U33000-230/U33000-230_01_140_140_DC-Power-Supply-0-500-V-230-V-5060-Hz.jpg)
![Helmholtz Coils, 300 mm, 1000906 [U8481500], Induction](/thumblibrary/U8481500/U8481500_01_140_140_Helmholtz-Coils-300-mm.jpg)
![Experiment: Fine-Beam Tube (115 V, 50/60 Hz), 8000667 [UE3070700-115], Experiments with Electron Tubes](/thumblibrary/UE3070700-115/UE3070700-115_01_140_140_Experiment-Fine-Beam-Tube-115-V-5060-Hz.jpg)
![Experiment: Fine-Beam Tube (230 V, 50/60 Hz), 8000668 [UE3070700-230], Experiments with Electron Tubes](/thumblibrary/UE3070700-230/UE3070700-230_01_140_140_Experiment-Fine-Beam-Tube-230-V-5060-Hz.jpg)
![Set of 15 Safety Experiment Leads, 75 cm, 2.5 mm², 1002843 [U138021], Circuits](/thumblibrary/U138021/U138021_01_140_140_Set-of-15-Safety-Experiment-Leads-75-cm-25-mm.jpg)
![Analogue Multimeter ESCOLA 100, 1013527 [U8557380], Hand-held Analog Measuring Instruments](/thumblibrary/U8557380/U8557380_01_140_140_Analogue-Multimeter-ESCOLA-100.jpg)
![Safety Experiment Leads, 75 cm, 2.5 mm², blue, red, (2 pcs), 1017718 [U13816], Experiment Leads and Cables](/thumblibrary/U13816/U13816_01_140_140_Safety-Experiment-Leads-75-cm-25-mm-blue-red-2-pcs.jpg)
![Pocket Measuring Tape, 2 m, 1002603 [U10073], Measurement of Length](/thumblibrary/U10073/U10073_01_140_140_Pocket-Measuring-Tape-2-m.jpg)
![Set of 15 Experiment Leads, 75 cm 1 mm², 1002840 [U13800], Circuits](/thumblibrary/U13800/U13800_01_140_140_Set-of-15-Experiment-Leads-75-cm-1-mm.jpg)
![Barrel Foot, 1 kg, 1002834 [U13265], Bases](/thumblibrary/U13265/U13265_01_140_140_Barrel-Foot-1-kg.jpg)
![Digital Counter (230 V, 50/60 Hz), 1001033 [U8533341-230], Digital Counters](/thumblibrary/U8533341-230/U8533341-230_01_140_140_Digital-Counter-230-V-5060-Hz.jpg)
![Tubing, Silicone 6 mm, 1002622 [U10146], Hose, Flow hose](/thumblibrary/U10146/U10146_01_140_140_Tubing-Silicone-6-mm.jpg)
![HF Patch Cord, BNC/4 mm Plug, 1002748 [U11257], Experiment Leads and Cables](/thumblibrary/U11257/U11257_01_140_140_HF-Patch-Cord-BNC4-mm-Plug.jpg)
![Digital Multimeter P3340, 1002785 [U118091], Hand-held Digital Measuring Instruments](/thumblibrary/U118091/U118091_01_140_140_Digital-Multimeter-P3340.jpg)
![PC Oscilloscope 2x25 MHz, 1020857 [U11830], Oscilloscopes](/thumblibrary/U11830/U11830_01_140_140_PC-Oscilloscope-2x25-MHz.jpg)
![K-Type NiCr-Ni Immersion Sensor, -65°C – 550°C, 1002804 [U11854], Thermometers](/thumblibrary/U11854/U11854_01_140_140_K-Type-NiCr-Ni-Immersion-Sensor-65-C-550-C.jpg)
![Tube Holder S -
for the experimental setup of tubes of series S, 1014525 [U185002], Electron Tubes S](/thumblibrary/U185002/U185002_01_140_140_Tube-Holder-S-for-the-experimental-setup-of-tubes-of-series-S.jpg)
![Function Generator FG 100 (230 V, 50/60 Hz), 1009957 [U8533600-230], Function Generators](/thumblibrary/U8533600-230/U8533600-230_01_140_140_Function-Generator-FG-100-230-V-5060-Hz.jpg)
![Analogue Multimeter ESCOLA 30, 1013526 [U8557330], Hand-held Analog Measuring Instruments](/thumblibrary/U8557330/U8557330_01_140_140_Analogue-Multimeter-ESCOLA-30.jpg)
![Clamp with Hook, 1002828 [U13252], Clamps](/thumblibrary/U13252/U13252_01_140_140_Clamp-with-Hook.jpg)
![Tripod Stand 185 mm, 1002836 [U13271], Bases](/thumblibrary/U13271/U13271_01_140_140_Tripod-Stand-185-mm.jpg)
![Linear Resistor, 47 Ohm, 1012908 [U333016], Plug-In Component System](/thumblibrary/U333016/U333016_01_140_140_Linear-Resistor-47-Ohm.jpg)