File:Tuve & Breit Tesla coil particle accelerator 1928.jpg
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Summary
| Description |
English: A 5 MV Tesla coil built by pioneering accelerator physicists Merle Tuve and Gregory Breit at the Carnegie Institution in 1928 for use as an early particle accelerator. It consists of a cylindrical secondary coil one meter long of 800 turns of fine wire on a pyrex tube, with spherical metal corona caps attached to each end, with a spiral primary of 5 turns of thick wire around the center. The pyrex secondary coil form was evacuated and used as the acceleration tube within which the electrons were accelerated. It was operated immersed in a tank of insulating oil pressurized to 500 psi to prevent air breakdown to reach high voltages. The coil reached voltages of 5.2 MV but did not work well as a particle accelerator because the high frequency AC voltage left only a small interval of time at the peak of each cycle to accelerate the particles. |
| Date | |
| Source | Retrieved April 22, 2015 from Alden P. Armagnac, "A five-million-volt gun built to smash atoms" in Popular Science magazine, Popular Science Publishing Co., New York, Vol. 114, No. 1, January 1929, p. 23 on Google Books |
| Author | Alden P. Armagnac |
| Permission (Reusing this file) |
This 1929 issue of Popular Science magazine would have the copyright renewed in 1957. Online page scans of the Catalog of Copyright Entries, published by the US Copyright Office can be found here. Search of the Renewals for Periodicals for 1956, 1957, and 1958 show no renewal entries for Popular Science. Therefore the copyright was not renewed and it is in the public domain. |
Licensing
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This work is in the public domain because it was published in the United States between 1929 and 1963, and although there may or may not have been a copyright notice, the copyright was not renewed. For further explanation, see Commons:Hirtle chart and the copyright renewal logs. Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (70 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 03:31, 16 August 2015 | | 372 × 174 (8 KB) | Chetvorno | {{Information |Description ={{en|1=W:Tesla coil used in particle accelerator. It consists of a cylindrical secondary coil of fine wire, attached at either end to spherical electrodes, with a spiral primary of a few turns of thick wire.}} |Sour... |
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