Tel tron Dual Beam Tube S
Product Code : JA-APE-7298
The Tel tron Dual Beam Tube S (SKU JA-APE-7298) is a semi-evacuated electron tube filled with helium at low pressure and fitted with two electron guns, one tangential and one axial. Supplied by JaincoLab, this helium-filled dual beam tube makes the electron path visible as a fine glowing beam, so college students can measure the charge-to-mass ratio of the electron and observe collisions between electrons and gas atoms in the same tube.
Specifications
The Dual Beam Tube S contains low-pressure helium and two electron guns; when electrons excite the helium atoms the beam glows, which is what allows its path to be seen and measured. Electrical ratings and dimensions are not part of the listed data and are confirmed on the quotation.
| Product | Tel tron Dual Beam Tube S |
| SKU | JA-APE-7298 |
| Brand and series | Tel tron, S series |
| Tube type | Semi-evacuated electron tube |
| Gas filling | Helium at low pressure |
| Electron guns | One tangential and one axial |
| Beam visibility | Fine luminescent beam from excitation of the helium atoms |
| Mounting | Tel tron Tube Holder S (listed separately) |
Applications of the helium-filled dual beam tube
The tube supports two kinds of experiment depending on which gun is used and how the magnetic field is aligned: with the tangential gun and a field at right angles the beam bends into a circle for e/m work, and with the axial gun and a coaxial field it shows collision effects.
- Determining the specific charge e/m of the electron from the diameter of the circular beam (tangential gun, perpendicular magnetic field)
- Observing particle collisions and the kinetic theory of gases with the axial gun in a coaxial magnetic field
- Showing how a magnetic field bends a moving electron beam
- Modern physics practicals in B.Sc and engineering physics laboratories
Scope of supply and ordering
This listing is for one Tel tron Dual Beam Tube S. The magnetic field for the experiments comes from a Helmholtz coil pair such as the Tel tron Helmholtz Pair of Coils S, and the S-series tubes mount on the Tel tron Tube Holder S; both are separate listings. Power supplies, accessories, spares and quantities are confirmed on the quotation.
Minimum order quantity, lead time and packing are confirmed on each quotation according to the quantity and where the consignment is going. Single tubes for a college lab, sets for several benches and tender quantities can all be quoted, including export orders for Africa, the Middle East and South and South-East Asia.
Frequently asked questions
How is e/m measured with the Dual Beam Tube S?
Electrons from the tangential gun are bent into a circular path by a magnetic field at right angles to the beam, and the specific charge e/m is worked out from the diameter of the glowing circle.
Why is the tube filled with helium?
The low-pressure helium glows where the electrons strike its atoms, so the path of the beam is visible and its diameter can be measured.
Which coils and holder does it need?
Magnetic field experiments use a Helmholtz coil pair, such as the Tel tron Helmholtz Pair of Coils S, and the tube mounts on the Tel tron Tube Holder S. Both are listed separately.
Related products
Other electron tubes and modern physics apparatus are listed under atomic physics equipment; the wider JaincoLab catalogue is under physics lab equipment.
Request a quote
For a price on the Tel tron Dual Beam Tube S, send the quantity, any coils or holder required and the destination through the JaincoLab contact page or email [email protected]. Buying under a laboratory tender? Use our tenders page.
