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Slika:Crookes tube.jpg - Wikipedija, prosta enciklopedija

Slika:Crookes tube.jpg

Iz Wikipedije, proste enciklopedije

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[edit] Summary

Description

An early Crookes x-ray tube on display in the lobby of the Science Building at Winthrop University. These first generation 'cold cathode' tubes were used until about 1920. The electrode on the right is the cathode or negative electrode. The slanted electrode in the center of the bulb is the platinum anode or target. The electrode to the left is the auxiliary anode. The two projections on the neck of the tube to the right is a 'softening device' to control the pressure in the tube. With time the residual gas in Crookes tubes was adsorbed by the walls, increasing the vacuum. This reduced the amount of x-rays produced and resulted in 'harder' more energetic x-rays, until finally the tube stopped working. The 'softeners' used various techniques to release a small amount of gas into the tube, restoring it's function.

Source

Photo by Y. Trottier

Date

April 10th, 2006

Author

Y. Trottier

Permission
(Reusing this image)

See below



[edit] Licensing

I, the copyright holder of this work, hereby publish it under the following licenses:
GNU head Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation license, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation license".

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Datum in časDimenzijeUporabnikKomentar
trenutno05:52, 10. april 20062.288 × 1.712 (494 KB)Ytrottier (An "electron tube" on display in the lobby of the Science Building at Winthrop University. Photo by Y. Trottier, April 10th, 2006.)

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