Tel tron Perrin Tube D
Product Code : JA-APE-7305
The Tel tron Perrin Tube D (SKU JA-APE-7305) is a highly evacuated electron tube supplied by JaincoLab for studying how an electron beam responds to electric and magnetic fields. Its focusing gun sends a narrow beam across a fluorescent screen that is tilted relative to the beam axis, so the trace of the beam is visible along its length. In college practicals this Perrin tube for e/m work is used with the Helmholtz Coils D to measure the specific charge of the electron.
Specifications
The Perrin Tube D offers two ways of deflecting its beam: electrically, through the field of a built-in plate capacitor, and magnetically, through the external Helmholtz Coils D; its inclined fluorescent screen shows the resulting path. Voltages and dimensions are confirmed on the quotation.
| Product | Tel tron Perrin Tube D |
| SKU | JA-APE-7305 |
| Brand and series | Tel tron, D series |
| Tube type | Highly evacuated electron tube |
| Electron gun | Focusing |
| Screen | Fluorescent, inclined relative to the beam axis |
| Electric deflection | Built-in plate capacitor |
| Magnetic deflection | External Tel tron Helmholtz Coils D (listed separately) |
Applications of the Perrin tube in electron physics
The tube is used to compare electric and magnetic deflection of the same beam and, by adjusting the two fields until their effects cancel, to calculate the charge-to-mass ratio e/m and the mean velocity of the electrons.
- Tracing the path of an electron beam on the inclined fluorescent screen
- Electric deflection between the plates of the built-in capacitor
- Magnetic deflection with the external Helmholtz Coils D
- Field-cancellation measurement of e/m and mean electron velocity in B.Sc and engineering physics practicals
Scope of supply and ordering
This listing covers one Tel tron Perrin Tube D. The Helmholtz Coils D needed for magnetic deflection and the Tube Holder D that carries D-series tubes are separate listings, and the power supply is not included. Accessories, spares and quantities are confirmed on the quotation.
Minimum order quantity, lead time and packing are confirmed on each quotation for the number of tubes and the destination. JaincoLab handles single-tube orders for a physics department as well as bulk institutional and tender supply, including export to Africa, the Middle East and South and South-East Asia.
Frequently asked questions
How is the beam deflected in the Perrin Tube D?
In two ways: electrically, by the field of the built-in plate capacitor, and magnetically, by the external Tel tron Helmholtz Coils D.
Can e/m be measured with it?
Yes. By adjusting the fields so that the electric and magnetic deflections cancel, students can determine the charge-to-mass ratio e/m and study the mean velocity of the electrons.
What is needed besides the tube?
The Helmholtz Coils D for magnetic deflection, the Tube Holder D for mounting and a suitable power supply. The coils and holder are separate listings; the supply is confirmed on the quotation.
Related products
- Tel tron Helmholtz Pair of Coils D
- Tel tron Tube Holder D
- Tel tron Electron Deflection Tube D
- Tel tron Perrin Tube S
Further electron tubes are grouped under atomic physics equipment, part of the JaincoLab range of physics lab equipment.
Request a quote
For a price on the Tel tron Perrin Tube D, send the quantity and destination through the JaincoLab contact page or email [email protected]. Tender and project enquiries can be sent through the tenders page.
