Fine Beam e/m System, He - MCP - Not Currently Available
Fine Beam e/m System, He - MCP - Not Currently Available
TEL-8481SYS3/CS (NOT CURRENTLY AVAILABLE)
The fine beam tube is used for investigating the deflection of cathode rays in a uniform magnetic field. Tube is in Helium. Manufactured by MCP Shanghai.
NOT CURRENTLY AVAILABLE
TEL-8481SYS3/CS
Objects
Deflection of electrons in a closed circular path inside a magnetic field
Determination of specific change of an electron e/m
Principles
The fine beam tube is used for investigating the deflection of cathode rays in a uniform
magnetic field produced by a pair of Helmholtz coils (TEL-8481500/C). In addition, it can also be used for quantitative determination of the specific charge of an electron e/m.
Located inside a glass bulb with a helium residual gas atmosphere is an electron gun, which consists of an indirectly heated oxide cathode, a Wehnelt cylinder and a perforated anode. The gas atoms are ionized along the path of the electrons and a narrow, well-defined, luminescent beam is produced. Incorporated measurement marks facilitate a parallax-free determination of the diameter of the circular path of the beam deflected in the magnetic field.
SYSTEM INCLUDES:
1 pc Fine beam tube, He with base - TEL-8481435/C
1 pc Pair of Helmholtz coils -TEL-8481500/C
1 pc DC power supply – TEL-U33000/C
( The multimeter and cables shown are not included in the system. )
TEL-2525SYS3
Recreate the first experiment to measure the charge to mass ratio of the electron. Your students can deflect the electron beam with electrostatic forces, magnetic forces, or both. This experiment helped usher in modern physics at the turn of the twentieth century, and provides the ability to calculate the speed of the electron beam by balancing electrostatic and magnetic forces.