Tel tron Electron Deflection Tube D
Product Code : JA-APE-7299
The Tel tron Electron Deflection Tube D (SKU JA-APE-7299) is a highly evacuated electron deflection tube with a focusing electron gun and a fluorescent screen set at an angle to the beam, so the whole path of the electrons shows up as a trace. Supplied by JaincoLab for college and senior-school physics, it is used to study how electric and magnetic fields deflect an electron beam and to find the specific charge e/m and the electron velocity.
Specifications
The tube combines a focusing gun, a built-in plate capacitor for electric deflection and an inclined fluorescent screen that makes the beam path visible; magnetic deflection needs the external Helmholtz coil pair D, and electrical ratings and dimensions are confirmed on the quotation.
| Product | Tel tron Electron Deflection Tube D |
| SKU | JA-APE-7299 |
| Brand and series | Tel tron, D series |
| Tube type | Highly evacuated electron tube |
| Electron gun | Focusing |
| Screen | Fluorescent, inclined to the beam axis so the beam path is visible |
| Electric deflection | Built-in plate capacitor |
| Magnetic deflection | Tel tron Helmholtz Pair of Coils D (listed separately) |
| Mounting | Tel tron Tube Holder D (listed separately) |
Uses of the electron deflection tube
The tube lets a class watch an electron beam bend in an electric field, in a magnetic field, and in both at once; when the electric field is set so that it exactly cancels the magnetic deflection, the beam runs straight and e/m and the electron velocity can be calculated.
- Showing deflection of an electron beam between the plates of the built-in capacitor
- Showing magnetic deflection with the Helmholtz coil pair D
- Balancing the two deflections to find the specific charge e/m and the electron velocity
- Cathode-ray and electron-beam topics in B.Sc and engineering physics practicals
Scope of supply and ordering
The listing covers one Tel tron Electron Deflection Tube D. The Helmholtz Pair of Coils D used for magnetic deflection and the Tube Holder D, which carries the complete D-series range, are separate listings; power supplies are not part of this listing. Accessories, spares and quantities are confirmed on the quotation.
Packing, minimum order quantity and lead time are confirmed on each quotation for the number of tubes and the delivery destination. JaincoLab quotes single tubes for a department as well as institutional and tender quantities, with export supply to Africa, the Middle East and South and South-East Asia.
Frequently asked questions
How does the tube give e/m?
The electric field of the built-in plate capacitor is adjusted until it cancels the deflection produced by the magnetic field of the Helmholtz coils. From the field values at balance the specific charge e/m and the velocity of the electrons can be found.
Is a magnetic field source included?
No. Magnetic deflection uses the Tel tron Helmholtz Pair of Coils D, which is a separate listing and can be quoted with the tube.
What is the tube mounted on?
The Tel tron Tube Holder D is the holder for the D-series tubes and accessories and is listed separately.
Related products
- Tel tron Helmholtz Pair of Coils D
- Tel tron Tube Holder D
- Tel tron Perrin Tube D
- Electrostatic Deflection Cathode Ray Tube
More electron tubes are listed in the atomic physics equipment range, part of the JaincoLab catalogue of physics lab equipment.
Request a quote
To get a quotation for the Tel tron Electron Deflection Tube D, send the quantity and delivery destination through the JaincoLab contact page or email [email protected]. Institutions and contractors buying under a tender can also reach us via the tenders page.
