File:Helmholtz coils in free radical experiment NBS 1957.jpg

From Wikimedia Commons, the free media repository
Jump to navigation Jump to search

Original file (1,114 × 848 pixels, file size: 276 KB, MIME type: image/jpeg)

Captions

Captions

Add a one-line explanation of what this file represents

Summary

[edit]
Description
English: Research on en:free radicals in 1957 at the US National Bureau of Standards (now NIST) The radicals are bombarded with electrons inside the vacuum chamber (center). The chamber is surrounded by Helmholtz coils (hoops) on three axes which are adjusted to cancel external magnetic fields in the chamber.

Caption: Apparatus for measuring the energy loss of bombarding electrons passing through a free radical condensate
Date
Source Retrieved January 30, 2014 from Annual Report 1957, Research Highlights of the National Bureau of Standards, miscellaneous publication 226, US Government Printing Office, p. 30 on Google Books
Author A. V. Astin, director of Bureau of Standards, is listed on title page

Licensing

[edit]
Public domain
This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code. Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See § 313.6(C)(1) of Compendium of U.S. Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current21:12, 30 January 2014Thumbnail for version as of 21:12, 30 January 20141,114 × 848 (276 KB)Chetvorno (talk | contribs)User created page with UploadWizard

You cannot overwrite this file.

There are no pages that use this file.

File usage on other wikis

The following other wikis use this file:

Metadata

This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.

Retrieved from "https://commons.wikimedia.org/w/index.php?title=File:Helmholtz_coils_in_free_radical_experiment_NBS_1957.jpg&oldid=911521267"